Fix documentation

.github/workflows/pages.yml

@@ -0,0 +1,37 @@
+name: Deploy Documentation
+on:
+  push:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  GitHubPages:
+    name: GitHub Pages
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload Artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: 'doc/'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -1,6 +1,7 @@
 /.phpdoc/cache/
 /.vscode/
 /vendor/
+.php-cs-fixer.cache
 .php-cs-fixer.php
 composer.lock
 phpcs.xml

.phpdoc/guide/changelog.rst

@@ -0,0 +1,34 @@
+.. title:: Changelog
+
+Changelog
+#########
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+v1.1.0
+======
+
+**New Features:**
+
+* Extended `documentation <https://opencultureconsulting.github.io/psr-15/>`_
+
+**Minor Changes:**
+
+* Added Composer commands for development tools (PHP_CodeSniffer, PHP-CS-Fixer, PHPStan, Psalm and phpDocumentor)
+
+**Maintencance:**
+
+* Updated dependencies
+
+v1.0.1
+======
+
+**Maintenance:**
+
+* Updated dependencies
+
+v1.0.0
+======
+
+**Initial Release**

.phpdoc/guide/index.rst

@@ -0,0 +1,11 @@
+.. title:: PSR-15 Queue
+
+Documentation
+#############
+
+.. toctree::
+  :maxdepth: 2
+
+  overview/index
+  usage/index
+  changelog

.phpdoc/guide/overview/abstractmiddleware.rst

@@ -0,0 +1,52 @@
+.. title:: AbstractMiddleware
+
+AbstractMiddleware
+##################
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+The `AbstractMiddleware` is a little helper for creating your own middlewares. It processes the incoming request before
+handing it over to the next middleware in line, and later processes the response before returning it to the previous
+middleware. Originally both methods just return their argument unchanged, so you should implement either one of them or
+both as needed.
+
+The `AbstractMiddleware` implements the `Psr\Http\Server\MiddlewareInterface` following PHP-FIG's recommendation
+`PSR-15: HTTP Server Request Handlers <https://www.php-fig.org/psr/psr-15/>`_.
+
+Properties
+==========
+
+The `AbstractMiddleware` has a single protected property `AbstractMiddleware::requestHandler` referencing the request
+handler which called the middleware. This can be used to access the request and/or response object (as properties of
+:doc:`queuerequesthandler`) when they are otherwise not available.
+
+Methods
+=======
+
+The `AbstractMiddleware` provides one public API method and two protected methods. While the former is final and makes
+sure it implements the `Psr\Http\Server\MiddlewareInterface`, the latter are intended to be extended in your own class.
+
+The main :php:method:`OCC\PSR15\AbstractMiddleware::process()` method implements the interface and is also called when
+invoking the middleware object directly. It first passes the incoming request to the
+:php:method:`OCC\PSR15\AbstractMiddleware::processRequest()` method, then hands over the result to the request handler
+to receive a response, which is then processed by :php:method:`OCC\PSR15\AbstractMiddleware::processResponse()` before
+returning it back to the request handler again.
+
+Processing a Request
+--------------------
+
+The default method of `AbstractMiddleware` just returns the request unchanged. If you need to process the request, you
+have to implement your own `processRequest()` method. It takes a request object as only argument and must return a
+valid request object as well. Just make sure it follows PHP-FIG's standard recommendation
+`PSR-7: HTTP Message Interfaces <https://www.php-fig.org/psr/psr-7/>`_ and implements the
+`Psr\Http\Message\ServerRequestInterface`.
+
+Processing a Response
+---------------------
+
+The default method of `AbstractMiddleware` just returns the response unchanged. If you need to process the response,
+you have to implement your own `processResponse()` method. It takes a response object as only argument and must return
+a valid response object as well. Just make sure it follows PHP-FIG's standard recommendation
+`PSR-7: HTTP Message Interfaces <https://www.php-fig.org/psr/psr-7/>`_ and implements the
+`Psr\Http\Message\ResponseInterface`.

.phpdoc/guide/overview/index.rst

@@ -0,0 +1,22 @@
+.. title:: Overview
+
+Overview
+########
+
+The package contains an implementation of `PSR-15: HTTP Server Request Handlers <https://www.php-fig.org/psr/psr-15/>`_
+in a queue-based variant. A :doc:`queuerequesthandler` handles an incoming HTTP request by passing it through a queue
+of one or more middlewares. The :doc:`middlewarequeue` provides the middlewares in first-in, first-out (FIFO) order,
+i.e. the HTTP request is passed from middleware to middleware preserving the order in which the middlewares were added
+to the queue. An :doc:`abstractmiddleware` helps developing your own middlewares, but you can also use any middleware
+implementing the `Psr\Http\Server\MiddlewareInterface <https://packagist.org/packages/psr/http-server-middleware>`_.
+
+All files share the highest coding standards of `PHPStan <https://phpstan.org/>`_ and `Psalm <https://psalm.dev/>`_,
+and full `PSR-12 <https://www.php-fig.org/psr/psr-12/>`_ compliance to make sure they can be combined and easily used
+in other projects.
+
+.. toctree::
+  :maxdepth: 2
+
+  queuerequesthandler
+  middlewarequeue
+  abstractmiddleware

.phpdoc/guide/overview/middlewarequeue.rst

@@ -0,0 +1,66 @@
+.. title:: MiddlewareQueue
+
+MiddlewareQueue
+###############
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+The `MiddlewareQueue` manages the middlewares involved in processing a server request. It makes sure they are called in
+first-in, first-out (FIFO) order, i.e. the same order they were added to the queue. It also ensures all middlewares are
+implementing the `PSR-15: HTTP Server Request Handlers <https://www.php-fig.org/psr/psr-15/>`_ specification for the
+`Psr\Http\Server\MiddlewareInterface`.
+
+When instantiating a `MiddlewareQueue` it defaults to being empty. But you can optionally pass an iterable set of
+middlewares to the constructor which are then put into the queue. To demonstrate, the following examples both have
+exactly the same result.
+
+  Examples:
+
+  .. code-block:: php
+    use OCC\PSR15\MiddlewareQueue;
+
+    $middlewares = [
+        new MiddlewareOne(),
+        new MiddlewareTwo()
+    ];
+
+    $queue = new MiddlewareQueue($middlewares);
+
+  .. code-block:: php
+    use OCC\PSR15\MiddlewareQueue;
+
+    $queue = new MiddlewareQueue();
+
+    $queue->enqueue(new MiddlewareOne());
+    $queue->enqueue(new MiddlewareTwo());
+
+The `MiddlewareQueue` is based on a `OCC\Basics\DataStructures\StrictQueue`.
+
+Methods
+=======
+
+The `MiddlewareQueue` provides a set of API methods, with `MiddlewareQueue::enqueue()` and `MiddlewareQueue::dequeue()`
+being the most relevant ones. The former will add a new item at the end of the queue while the latter removes and
+returns the first item from the queue.
+
+For a complete API documentation have a look at the
+`StrictQueue <https://opencultureconsulting.github.io/php-basics/classes/OCC-Basics-DataStructures-StrictQueue.html>`_.
+
+Adding a Middleware
+-------------------
+
+Invoking `MiddlewareQueue::enqueue()` will add a middleware at the end of the queue. The only argument must be a
+middleware object implementing the `Psr\Http\Server\MiddlewareInterface`. If the given argument does not meet the
+criterion an `OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException` is thrown.
+
+Have a look at the :doc:`abstractmiddleware` for an easy way to create your own middlewares!
+
+Fetching the next in line
+-------------------------
+
+Calling `MiddlewareQueue::dequeue()` will return the first middleware from the queue, i.e. the oldest one on the queue.
+Also, this middleware is removed from the queue.
+
+If the queue is empty a `RuntimeException` is thrown, so make sure to check the queue's length (e.g. with `count()`)
+before trying to dequeue an item!

.phpdoc/guide/overview/queuerequesthandler.rst

@@ -0,0 +1,108 @@
+.. title:: QueueRequestHandler
+
+QueueRequestHandler
+###################
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+The `QueueRequestHandler` is the core piece of this package. It fetches incoming HTTP requests, passes them through a
+queue of middlewares and finally sends the response back to the client. It also catches any exceptions not handled by
+a middleware and turns them into a proper HTTP error response.
+
+The `QueueRequestHandler` implements the `Psr\Http\Server\RequestHandlerInterface` following PHP-FIG's recommendation
+`PSR-15: HTTP Server Request Handlers <https://www.php-fig.org/psr/psr-15/>`_.
+
+For a minimal working example have a look at :doc:`../usage/usage`.
+
+Properties
+==========
+
+The `QueueRequestHandler` has three **read-only** properties. They are initially set at instantiation and can be
+directly accessed from the object via magic methods (e.g. `$requestHandler->queue`).
+
+Middleware Queue
+----------------
+
+The queue of middlewares can be accessed as `QueueRequestHandler::queue` and offers a handy API to `enqueue()`,
+`dequeue()` or otherwise manipulate its contents. All middlewares must implement `Psr\Http\Server\MiddlewareInterface`.
+Have a look at :doc:`middlewarequeue` for more details.
+
+When instantiating a `QueueRequestHandler` the queue defaults to being empty. But you can optionally pass an iterable
+set of middlewares to the constructor which are then put into the queue. To demonstrate, the following examples both
+have exactly the same result.
+
+  Examples:
+
+  .. code-block:: php
+    use OCC\PSR15\QueueRequestHandler;
+
+    $middlewares = [
+        new MiddlewareOne(),
+        new MiddlewareTwo()
+    ];
+
+    $requestHandler = new QueueRequestHandler($middlewares);
+
+  .. code-block:: php
+    use OCC\PSR15\QueueRequestHandler;
+
+    $requestHandler = new QueueRequestHandler();
+
+    $requestHandler->queue->enqueue(new MiddlewareOne());
+    $requestHandler->queue->enqueue(new MiddlewareTwo());
+
+HTTP Server Request
+-------------------
+
+The server request is always available as `QueueRequestHandler::request`. It follows PHP-FIG's standard recommendation
+`PSR-7: HTTP Message Interfaces <https://www.php-fig.org/psr/psr-7/>`_ and implements the
+`Psr\Http\Message\ServerRequestInterface`.
+
+When instantiating a `QueueRequestHandler` the `$request` property is initially set by fetching the actual server
+request data from superglobals. The property is reset each time the request is passed through a middleware and thus
+always represents the current state of the request.
+
+HTTP Response
+-------------
+
+The response can be read as `QueueRequestHandler::response`. It also follows PHP-FIG's standard recommendation
+`PSR-7: HTTP Message Interfaces <https://www.php-fig.org/psr/psr-7/>`_ and implements the
+`Psr\Http\Message\ResponseInterface`.
+
+When instantiating a `QueueRequestHandler` the `$response` property is initially set as a blank HTTP response with
+status code `200`. The property is reset each time the response is passed through a middleware and thus
+always represents the latest state of the response.
+
+Both, request and response, use the awesome implementations of `Guzzle <https://github.com/guzzle/psr7>`_.
+
+Methods
+=======
+
+The `QueueRequestHandler` provides two public API methods, :php:method:`OCC\PSR15\QueueRequestHandler::handle()` and
+:php:method:`OCC\PSR15\QueueRequestHandler::respond()`. As their names suggest, the former handles the server request
+while the latter sends the response back to the client. Invoking the request handler object directly does the same as
+calling the `handle()` method.
+
+Handling a Server Request
+-------------------------
+
+After adding at least one middleware to the queue, you can start handling a request by simply calling
+:php:method:`OCC\PSR15\QueueRequestHandler::handle()`. Optionally, you can pass a request object as argument, but since
+the actual server request was already fetched in the constructor and will be used by default, most of the time you
+don't need to. All request objects must implement `Psr\Http\Message\ServerRequestInterface`.
+
+The `handle()` method returns the final response after passing it through all middlewares. The response object always
+implements `Psr\Http\Message\ResponseInterface`.
+
+In case of an error the request handler catches any exception and creates a response with the exception code as status
+code (if it's within the valid range of HTTP status codes, otherwise it's set to `500 (Internal Server Error)`), and
+the exception message as body.
+
+Sending the Response
+--------------------
+
+Sending the final response to the client is as easy as calling :php:method:`OCC\PSR15\QueueRequestHandler::respond()`.
+Optionally, you can provide an exit code as argument (an integer in the range `0` to `254`). If you do so, script
+execution is stopped after sending out the response and the given exit status is set. The status `0` means the request
+was handled successfully, every other status is considered an error.

.phpdoc/guide/usage/index.rst

@@ -0,0 +1,15 @@
+.. title:: User Guide
+
+User Guide
+##########
+
+The *Queue-based HTTP Server Request Handler* is a library package, not a stand-alone application. The following
+documentation of requirements and installation procedures describes how to make use of the classes within your own
+application. For a detailed description of the package's contents have a look at the :doc:`../overview/index` page.
+
+.. toctree::
+  :maxdepth: 2
+
+  requirements
+  installation
+  usage

.phpdoc/guide/usage/installation.rst

@@ -0,0 +1,59 @@
+.. title:: Installation
+
+Installation
+############
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+Composer
+========
+
+The intended and recommended way of re-using this package is via `Composer <https://getcomposer.org/>`_. The following
+command will get you the latest version and make it a dependency of your project. It will also request all dependencies
+and register all classes with the autoloader to make them available inside the application.
+
+.. code-block:: shell
+
+  # This will install the latest stable version suitable for your project
+  composer require "opencultureconsulting/psr15"
+
+If you want to use a specific version other than the latest available for your environment, you can do so by appending
+the desired version constraint:
+
+.. code-block:: shell
+
+  # This will install the latest patch level version of 1.1 (i. e. >=1.1.0 && <1.2.0)
+  composer require "opencultureconsulting/psr15:~1.1"
+
+All available versions as well as further information about :doc:`requirements` and dependencies can be found on
+`Packagist <https://packagist.org/packages/opencultureconsulting/psr15>`_.
+
+Git
+===
+
+Alternatively, you can fetch the files from `GitHub <https://github.com/opencultureconsulting/psr-15>`_ and add them to
+your project manually. The best way is by cloning the repository, because then you can easily update to a newer version
+by just pulling the changes and checking out a different version tag.
+
+.. code-block:: shell
+
+  # This will clone the repository into the "psr15" directory
+  git clone https://github.com/opencultureconsulting/psr-15.git psr15
+
+If you want to use a specific version other than the latest development state, you have to specify the desired tag as
+well:
+
+.. code-block:: shell
+
+  # This will clone the repository state at version "1.1.0" into the "psr15" directory
+  git clone --branch=v1.1.0 https://github.com/opencultureconsulting/psr-15.git psr15
+
+Be aware that you also need to make the classes available in your application by either adding them to your autoloader
+or by including all files individually in PHP. Also don't forget to do the same for all :doc:`requirements`.
+
+Download
+========
+
+As a last resort you can also just download the files. You can find all available versions as well as the current
+development state on the `GitHub release page <https://github.com/opencultureconsulting/psr-15/releases>`_.

.phpdoc/guide/usage/requirements.rst

@@ -0,0 +1,27 @@
+.. title:: Requirements
+
+Requirements
+############
+
+Environment
+===========
+
+This package requires at least **PHP 8.1**.
+
+It is highly recommended to use `Composer <https://getcomposer.org/>`_ for dependency management and autoloading,
+although it is technically not strictly required for using any of these classes. But it certainly makes it a lot
+easier!
+
+Dependencies
+============
+
+This package obviously depends on `psr/http-server-handler <https://packagist.org/packages/psr/http-server-handler>`_
+and `psr/http-server-middleware <https://packagist.org/packages/psr/http-server-middleware>`_ which define the standard
+`PSR-15: HTTP Server Request Handlers <https://www.php-fig.org/psr/psr-15/>`_ interfaces.
+
+It uses the `PSR-7: HTTP Message <https://www.php-fig.org/psr/psr-7/>`_ implementations for server request and response
+of the great `guzzlehttp/psr7 <https://packagist.org/packages/guzzlehttp/psr7>`_ library.
+
+The middleware queue is based on a `StrictQueue <https://opencultureconsulting.github.io/php-basics/guides/overview/datastructures.html#strictqueue>`_
+of the `opencultureconsulting/basics <https://packagist.org/packages/opencultureconsulting/basics>`_ package which also
+provides some useful traits.

.phpdoc/guide/usage/usage.rst

@@ -0,0 +1,157 @@
+.. title:: Usage
+
+Usage
+#####
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+The following example shows a very basic *Queue-based HTTP Server Request Handler* using just two simple middlewares
+(called `MiddlewareOne` and `MiddlewareTwo`).
+
+Middlewares
+===========
+
+First of all, we need some middlewares to process our server request. Although we could use any middleware implementing
+the `Psr/Http/Server/MiddlewareInterface` (e.g. from `this great collection <https://github.com/middlewares>`_), we
+will write our own using the :doc:`../overview/abstractmiddleware` provided by this package.
+
+The abstract middleware already implements a complete middleware, but it will just pass requests through without doing
+anything. In order to have it do something, we need to implement our own :php:method:`OCC\PSR15\AbstractMiddleware::processRequest()`
+or :php:method:`OCC\PSR15\AbstractMiddleware::processResponse()` method, or both of them.
+
+The logic here is the same as with every `PSR-15: HTTP Server Request Handlers <https://www.php-fig.org/psr/psr-15/>`_
+middleware: The request gets passed through all middlewares' `processRequest()` methods in order of their addition to
+the queue, then a response is created and passed through all `processResponse()` methods, **but in reverse order**! So
+the first middleware in the queue gets the request first, but the response last.
+
+Our first middleware is very simple and just adds an attribute to the server request.
+
+.. code-block:: php
+  use OCC\PSR15\AbstractMiddleware;
+  use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+
+  class MiddlewareOne extends AbstractMiddleware
+  {
+      /**
+       * Process an incoming server request before delegating to next middleware.
+       *
+       * @param ServerRequest $request The incoming server request
+       *
+       * @return ServerRequest The processed server request
+       */
+      protected function processRequest(ServerRequest $request): ServerRequest
+      {
+          // Let's just add a new attribute to the request to later check
+          // which middleware was passed last.
+          return $request->withAttribute('LastMiddlewarePassed', 'MiddlewareOne');
+      }
+  }
+
+For a queue to make sense we need at least a second middleware, so let's create another one. Again, we will add an
+attribute to the request, but with the same name. So, whichever middleware handles the request last overwrites the
+attribute with its value. This way we can later check if our middlewares were passed in the correct order.
+
+.. code-block:: php
+  use OCC\PSR15\AbstractMiddleware;
+  use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+
+  class MiddlewareTwo extends AbstractMiddleware
+  {
+      /**
+       * Process an incoming server request before delegating to next middleware.
+       *
+       * @param ServerRequest $request The incoming server request
+       *
+       * @return ServerRequest The processed server request
+       */
+      protected function processRequest(ServerRequest $request): ServerRequest
+      {
+          // We add the same request attribute as in MiddlewareOne, effectively
+          // overwriting its value.
+          return $request->withAttribute('LastMiddlewarePassed', 'MiddlewareTwo');
+      }
+  }
+
+Also, we want to set the status code of the response according to the final value of our request attribute. Therefore,
+we need to implement `processResponse()` as well. We can do that in either one of our middlewares because it's the only
+response manipulation in our example, so the order of processing doesn't make a difference (remember: `MiddlewareTwo`
+gets to handle the response before `MiddlewareOne`). Let's go with `MiddlewareTwo`.
+
+.. code-block:: php
+  use OCC\PSR15\AbstractMiddleware;
+  use Psr\Http\Message\ResponseInterface as Response;
+  use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+
+  class MiddlewareTwo extends AbstractMiddleware
+  {
+      // MiddlewareTwo::processRequest() remains unchanged (see above).
+
+      /**
+       * Process an incoming response before returning it to previous middleware.
+       *
+       * @param Response $response The incoming response
+       *
+       * @return Response The processed response
+       */
+      protected function processResponse(Response $response): Response
+      {
+          // First we need to get the request attribute.
+          $lastMiddlewarePassed = $this->requestHandler->request->getAttribute('LastMiddlewarePassed');
+          if ($lastMiddlewarePassed === 'MiddlewareTwo') {
+              // Great, MiddlewareTwo was passed after MiddlewareOne,
+              // let's return status code 200!
+              return $response->withStatus(200);
+          } else {
+              // Oh no, something went wrong! We'll send status code 500.
+              return $response->withStatus(500);
+          }
+      }
+  }
+
+Well done! We now have two middlewares.
+
+Request Handler
+===============
+
+Let's use a :doc:`../overview/queuerequesthandler` to pass a server request through both of our middlewares in the
+correct order.
+
+.. code-block:: php
+  use OCC\PSR15\QueueRequestHandler;
+
+  // First of all, we instantiate the request handler.
+  // At this point we could already provide an array of middlewares as argument and
+  // skip the next step, but then we wouldn't learn how to use the MiddlewareQueue.
+  $requestHandler = new QueueRequestHandler();
+
+  // We can access the MiddlewareQueue as a property of the request handler.
+  // Let's add both of our middlewares, MiddlewareOne and MiddlewareTwo. Since
+  // this is a FIFO queue, the order is very important!
+  $requestHandler->queue->enqueue(new MiddlewareOne());
+  $requestHandler->queue->enqueue(new MiddlewareTwo());
+
+  // And we are ready to handle incoming requests!
+  // We don't even need to pass the server request to this method, because
+  // the constructor already took care of that!
+  $finalResponse = $requestHandler->handle();
+
+  // Now we can pass the final response back to our application.
+  // Alternatively, we can also return it directly to the client.
+  $requestHandler->respond();
+
+  // If we did everything right, the client should now receive an HTTP response
+  // with status code 200 (OK).
+
+And that's it!
+
+Diving Deeper
+=============
+
+To familiarize yourself with the FIFO principle of the middleware queue, you can try to exchange the two lines adding
+the middlewares to the queue, i.e. add `MiddlewareTwo` first and `MiddlewareOne` second. This will result in an HTTP
+response with status code `500 (Internal Server Error)`.
+
+This is exactly what we intended: Have a look at `MiddlewareTwo::processResponse()` again! If `$lastMiddlewarePassed`
+is not `MiddlewareTwo` (which it isn't when `MiddlewareOne` is added to the queue after `MiddlewareTwo`), we set the
+response status code to `500`.

.phpdoc/template/components/sidebar.html.twig

@@ -0,0 +1,31 @@
+<input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+    {% for version in project.versions %}
+        {% for toc in version.tableOfContents %}
+        <section class="phpdocumentor-sidebar__category -{{ toc.name|lower }}">
+            <h2 class="phpdocumentor-sidebar__category-header">{{ toc.name|title }}</h2>
+                {% for root in toc.roots %}
+                    {{ toc(root, 'components/menu.html.twig', 1) }}
+                {% endfor %}
+        </section>
+        {% endfor %}
+    {% endfor %}
+
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+        {% if project.settings.custom['graphs.enabled'] %}
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="graphs/classes.html">Class Diagram</a></h3>
+        {% endif %}
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>

.phpdoc/template/components/toc.html.twig

@@ -0,0 +1,19 @@
+{% for version in project.versions %}
+    {% for toc in version.tableOfContents|filter(toc => toc.name|lower == "documentation" or toc.name|lower == "packages") %}
+        <h4 id="toc-{{ toc.name|lower }}">{{ toc.name|title }}</h4>
+        <dl class="phpdocumentor-table-of-contents">
+        {% for root in toc.roots %}
+            <dt class="phpdocumentor-table-of-contents__entry -{{ toc.name|lower|trim('s', 'right') }}">
+                <a href="{{ root.url }}">{{ root.title|shortFQSEN }}</a>
+            </dt>
+            {% if root.children.count > 0 %}
+            <dd>
+            {% for child in root.children %}
+                <a href="{{ child.url }}">{{ child.title|shortFQSEN }}</a><br/>
+            {% endfor %}
+            </dd>
+            {% endif %}
+        {% endfor %}
+        </dl>
+    {% endfor %}
+{% endfor %}

.phpdoc/template/components/topnav.html.twig

@@ -0,0 +1,30 @@
+{%
+set topMenu = {
+    "menu": [
+        { "iconClass": "fab fa-php", "url": "https://packagist.org/packages/opencultureconsulting/basics"},
+        { "iconClass": "fab fa-github", "url": "https://github.com/opencultureconsulting/php-basics"}
+    ]
+}
+%}
+
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+    {% for key,menu in topMenu|default([]) %}
+        {% for menuitem in menu %}
+            <li class="phpdocumentor-topnav__menu-item -{{ key }}">
+                <a href="{{ menuitem.url }}">
+                    <span>
+                        {% if menuitem.icon %}
+                        <i class="fab fa-{{ menuitem.icon }}">{{ menuitem.icon }}</i>
+                        {% endif %}
+                        {% if menuitem.iconClass %}
+                        <i class="{{ menuitem.iconClass }}"></i>
+                        {% endif %}
+                        {{ menuitem.name }}
+                    </span>
+                </a>
+            </li>
+        {% endfor %}
+    {% endfor %}
+    </ul>
+</nav>

.phpdoc/template/css/custom.css.twig

@@ -0,0 +1,134 @@
+aside.phpdocumentor-sidebar
+{
+    display: flex;
+    flex-direction: column;
+}
+
+aside.phpdocumentor-sidebar
+    section.-documentation
+{
+    order: 1;
+}
+
+aside.phpdocumentor-sidebar
+    section.-packages
+{
+    order: 2;
+}
+
+aside.phpdocumentor-sidebar
+    section.-namespaces
+{
+    order: 3;
+}
+
+aside.phpdocumentor-sidebar
+    section.-reports
+{
+    order: 4;
+}
+
+aside.phpdocumentor-sidebar
+    section.-indices
+{
+    order: 5;
+}
+
+aside.phpdocumentor-sidebar
+    ul.phpdocumentor-list
+{
+    padding: 0 var(--spacing-md) !important;
+}
+
+p > code,
+li > code,
+code.prettyprint
+{
+    background-color: var(--code-background-color);
+    border: 1px solid #f0f0f0;
+    border-radius: var(--border-radius-base-size);
+    box-sizing: border-box;
+    font-size: var(--text-sm);
+    padding: var(--spacing-xxxs);
+}
+
+@media (max-width: 999px) {
+div.admonition-wrapper
+{
+    display: none;
+}
+}
+
+@media (min-width: 1000px) {
+div.admonition-wrapper
+{
+    display: block;
+    float: right;
+    padding: var(--spacing-md);
+    margin: 0 0 var(--spacing-md) var(--spacing-md);
+    width: auto;
+    font-size: var(--text-sm);
+    border: 1px solid var(--primary-color-lighten);
+}
+}
+
+div.admonition-wrapper
+    p.sidebar-title
+{
+    font-weight: bold;
+}
+
+div.contents
+    ul.phpdocumentor-list
+{
+    margin-bottom: 0;
+}
+
+div.phpdocumentor-content
+    div.section
+        ul
+{
+    padding-left: var(--spacing-lg);
+}
+
+div.phpdocumentor-content
+    div.section
+        ul
+            li
+{
+    padding-bottom: 0;
+}
+
+
+dl.phpdocumentor-table-of-contents
+    dt.phpdocumentor-table-of-contents__entry.-documentation:before
+{
+    content: 'D';
+}
+
+h2.phpdocumentor-content__title
+{
+    display: flex;
+    flex-direction: column;
+}
+
+h2.phpdocumentor-content__title
+    div.phpdocumentor-element__package
+{
+    order: 1;
+}
+
+h2.phpdocumentor-content__title
+    span.phpdocumentor-element__extends,
+h2.phpdocumentor-content__title
+    span.phpdocumentor-element__implements
+{
+    font-size: calc(var(--text-xxs) / 1.2 / 1.2);
+    order: 2;
+}
+
+h2.phpdocumentor-content__title
+    span:first-letter
+{
+    text-transform: lowercase;
+}

.phpdoc/template/index.html.twig

@@ -0,0 +1,30 @@
+{% extends 'base.html.twig' %}
+
+{% block content %}
+<section>
+    <ul class="phpdocumentor-breadcrumbs">
+        <li><a href>Home</a></li>
+    </ul>
+
+    <h2 class="phpdocumentor-content__title">Queue-based HTTP Server Request Handler</h2>
+
+    <p class="phpdocumentor-summary">An implementation of <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP
+    Server Request Handlers</a>.</p>
+
+    <p>The PHP Standard Recommendation PSR-15 defines interfaces for server request handlers and proposes a queue-based
+    implementation using different middlewares for processing requests and preparing responses. This package follows
+    those guidelines and provides a <a href="guides/overview/queuerequesthandler.html">HTTP server request handler</a>
+    implementation using a <a href="guides/overview/middlewarequeue.html">middleware queue</a>. It also contains an
+    <a href="guides/overview/abstractmiddleware.html">abstract class for middlewares</a> to ease the process of writing
+    your own middleware, but you can just as well use any middleware that implements the middleware interface specified
+    by PSR-15 (e.g. from the awesome <a href="https://github.com/middlewares">PSR-15 HTTP Middlewares</a> project).</p>
+
+    <p>All components of this package follow the highest coding standards of <a href="https://phpstan.org/">PHPStan</a>
+    and <a href="https://psalm.dev/">Psalm</a>, and comply to <a href="https://www.php-fig.org/psr/psr-12/">PSR-12</a>
+    code style guidelines to make sure they can be combined and easily re-used in other projects.</p>
+
+    <h3 id="toc">Table of Contents</h3>
+
+    {% include('components/toc.html.twig') %}
+</section>
+{% endblock %}

README.md

@@ -1,6 +1,29 @@
 # Queue-based HTTP Server Request Handler
 
-[![PHPStan](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpstan.yml/badge.svg)](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpstan.yml)
+***An implementation of [PSR-15: HTTP Server Request Handlers](https://www.php-fig.org/psr/psr-15/).***
+
+The PHP Standard Recommendation PSR-15 defines interfaces for server request handlers and proposes a queue-based implementation using different middlewares for processing requests and preparing responses. This package follows those guidelines and provides a [HTTP server request handler](src/QueueRequestHandler.php) implementation using a [middleware queue](src/MiddlewareQueue.php). It also contains an [abstract class for middlewares](src/AbstractMiddleware.php) to ease the process of writing your own middleware, but you can just as well use any middleware that implements `Psr\Http\Server\MiddlewareInterface` specified by PSR-15 (e.g. from the awesome [PSR-15 HTTP Middlewares](https://github.com/middlewares) project).
+
+All components of this package follow the highest coding standards of [PHPStan](https://phpstan.org/) and [Psalm](https://psalm.dev/), and comply to [PSR-12](https://www.php-fig.org/psr/psr-12/) code style guidelines to make sure they can be combined and easily used in other projects.
+
+## Quick Start
+
+The intended and recommended way of using this package is via [Composer](https://getcomposer.org/). The following command will get you the latest version:
+
+```shell
+composer require opencultureconsulting/psr15
+```
+
+All available versions as well as further information about requirements and dependencies can be found on [Packagist](https://packagist.org/packages/opencultureconsulting/psr15).
+
+## Full Documentation
+
+The full documentation is available on [GitHub Pages](https://opencultureconsulting.github.io/psr-15/) or alternatively in [doc/](doc/).
+
+## Quality Gates
+
+[![PHPCS](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpcs.yml/badge.svg)](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpcs.yml)
 [![PHPMD](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpmd.yml/badge.svg)](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpmd.yml)
 
-This is a queue-based implementation of [PSR-15: HTTP Server Request Handler](https://www.php-fig.org/psr/psr-15/) for your PHP projects.
+[![PHPStan](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpstan.yml/badge.svg)](https://github.com/opencultureconsulting/psr-15/actions/workflows/phpstan.yml)
+[![Psalm](https://github.com/opencultureconsulting/psr-15/actions/workflows/psalm.yml/badge.svg)](https://github.com/opencultureconsulting/psr-15/actions/workflows/psalm.yml)

composer.json

@@ -31,16 +31,17 @@
     "require": {
         "php": "^8.1",
         "guzzlehttp/psr7": "^2.6",
-        "opencultureconsulting/basics": "^2.0",
+        "opencultureconsulting/basics": "^2.1",
         "psr/http-server-handler": "^1.0",
         "psr/http-server-middleware": "^1.0"
     },
     "require-dev": {
-        "phpstan/phpstan": "^1.10",
-        "phpstan/phpstan-strict-rules": "^1.5",
-        "friendsofphp/php-cs-fixer": "^3.52",
-        "squizlabs/php_codesniffer": "^3.9",
-        "vimeo/psalm": "^5.23"
+        "phpdocumentor/shim": "^3.5",
+        "phpstan/phpstan": "^1.11",
+        "phpstan/phpstan-strict-rules": "^1.6",
+        "friendsofphp/php-cs-fixer": "^3.59",
+        "squizlabs/php_codesniffer": "^3.10",
+        "vimeo/psalm": "^5.25"
     },
     "provide": {
         "psr/http-server-handler-implementation": "1.0",
@@ -50,5 +51,38 @@
         "psr-4": {
             "OCC\\PSR15\\": "src/"
         }
+    },
+    "config": {
+        "allow-plugins": {
+            "phpdocumentor/shim": true
+        }
+    },
+    "scripts": {
+        "php-cs-fixer:check": [
+            "@php vendor/bin/php-cs-fixer check"
+        ],
+        "php-cs-fixer:fix": [
+            "@php vendor/bin/php-cs-fixer fix"
+        ],
+        "phpcs:check": [
+            "@php vendor/bin/phpcs"
+        ],
+        "phpdoc:build": [
+            "@php vendor/bin/phpdoc"
+        ],
+        "phpstan:check": [
+            "@php vendor/bin/phpstan"
+        ],
+        "psalm:check": [
+            "@php vendor/bin/psalm"
+        ]
+    },
+    "scripts-descriptions": {
+        "php-cs-fixer:check": "Runs a code check with PHP Coding Standards Fixer and reports problems. If a custom configuration file '.php-cs-fixer.php' exists, it will be used instead of the default settings in '.php-cs-fixer.dist.php'.",
+        "php-cs-fixer:fix": "Runs a code check with PHP Coding Standards Fixer and tries to fix all issues. If a custom configuration file '.php-cs-fixer.php' exists, it will be used instead of the default settings in '.php-cs-fixer.dist.php'.",
+        "phpcs:check": "Runs a code check with PHP_CodeSniffer and reports problems. If a custom configuration file '.phpcs.xml' exists, it will be used instead of the default settings in '.phpcs.xml.dist'.",
+        "phpdoc:build": "Builds the documentation from source files in ./src and additional templates in .phpdoc/. If a custom configuration file 'phpdoc.xml' exists, it will be used instead of the default settings in 'phpdoc.dist.xml'.",
+        "phpstan:check": "Runs a code check with PHPStan static code analyzer and reports problems. If a custom configuration file 'phpstan.neon' exists, it will be used instead of the default settings in 'phpstan.dist.neon'.",
+        "psalm:check": "Runs a code check with Psalm static code analyzer and reports problems. If a custom configuration file 'psalm.xml' exists, it will be used instead of the default settings in 'psalm.xml.dist'."
     }
 }

doc/classes/OCC-PSR15-AbstractMiddleware.html

@@ -0,0 +1,679 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-psr15.html">PSR15</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -class">
+        <h2 class="phpdocumentor-content__title">
+    AbstractMiddleware
+
+    
+            <div class="phpdocumentor-element__package">
+            in package
+            <ul class="phpdocumentor-breadcrumbs">
+                                    <li class="phpdocumentor-breadcrumb"><a href="packages/PSR15.html">PSR15</a></li>
+                            </ul>
+        </div>
+    
+            <span class="phpdocumentor-element__implements">
+            implements
+                            <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>                    </span>
+    
+    </h2>
+
+<div class="phpdocumentor-label-line">
+
+
+    <div class="phpdocumentor-label phpdocumentor-label--success"><span>Abstract</span><span>Yes</span></div>
+
+</div>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/AbstractMiddleware.php"><a href="files/src-abstractmiddleware.html"><abbr title="src/AbstractMiddleware.php">AbstractMiddleware.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">36</span>
+
+            <a href="classes/OCC-PSR15-AbstractMiddleware.html#source-view.36" class="phpdocumentor-element-found-in__source" data-line="36" data-modal="source-view" data-src="files/src/AbstractMiddleware.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">Abstract class implementing \Psr\Http\Server\MiddlewareInterface.</p>
+
+
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-PSR15-AbstractMiddleware.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+    <h4 id="toc-interfaces">
+        Interfaces
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#toc-interfaces" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr></dt>    </dl>
+
+
+
+
+
+
+
+<h4 id="toc-methods">
+    Methods
+    <a href="classes/OCC-PSR15-AbstractMiddleware.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-AbstractMiddleware.html#method___invoke">__invoke()</a>
+    <span>
+                                &nbsp;: <abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>    </span>
+</dt>
+<dd>Allow the middleware to be invoked directly.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-AbstractMiddleware.html#method_process">process()</a>
+    <span>
+                                &nbsp;: <abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>    </span>
+</dt>
+<dd>Process an incoming server request and produce a response.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -protected">
+    <a class="" href="classes/OCC-PSR15-AbstractMiddleware.html#method_processRequest">processRequest()</a>
+    <span>
+                                &nbsp;: <abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>    </span>
+</dt>
+<dd>Process an incoming server request before delegating to next middleware.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -protected">
+    <a class="" href="classes/OCC-PSR15-AbstractMiddleware.html#method_processResponse">processResponse()</a>
+    <span>
+                                &nbsp;: <abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>    </span>
+</dt>
+<dd>Process an incoming response before returning it to previous middleware.</dd>
+
+    </dl>
+
+
+
+        
+
+        
+
+            <section class="phpdocumentor-methods">
+        <h3 class="phpdocumentor-elements__header" id="methods">
+            Methods
+            <a href="classes/OCC-PSR15-AbstractMiddleware.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                -final        "
+>
+    <h4 class="phpdocumentor-element__name" id="method___invoke">
+        __invoke()
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#method___invoke" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/AbstractMiddleware.php"><a href="files/src-abstractmiddleware.html"><abbr title="src/AbstractMiddleware.php">AbstractMiddleware.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">103</span>
+
+            <a href="classes/OCC-PSR15-AbstractMiddleware.html#source-view.103" class="phpdocumentor-element-found-in__source" data-line="103" data-modal="source-view" data-src="files/src/AbstractMiddleware.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Allow the middleware to be invoked directly.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+        <span class="phpdocumentor-signature__final">final</span>            <span class="phpdocumentor-signature__name">__invoke</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$request</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Server\RequestHandlerInterface">RequestHandlerInterface</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$handler</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$request</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The server request to process</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$handler</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Server\RequestHandlerInterface">RequestHandlerInterface</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The request handler to delegate to</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The response object</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                -final        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_process">
+        process()
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_process" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/AbstractMiddleware.php"><a href="files/src-abstractmiddleware.html"><abbr title="src/AbstractMiddleware.php">AbstractMiddleware.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">57</span>
+
+            <a href="classes/OCC-PSR15-AbstractMiddleware.html#source-view.57" class="phpdocumentor-element-found-in__source" data-line="57" data-modal="source-view" data-src="files/src/AbstractMiddleware.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Process an incoming server request and produce a response.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+        <span class="phpdocumentor-signature__final">final</span>            <span class="phpdocumentor-signature__name">process</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$request</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Server\RequestHandlerInterface">RequestHandlerInterface</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$handler</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$request</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The server request to process</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$handler</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Server\RequestHandlerInterface">RequestHandlerInterface</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The request handler to delegate to</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The response object</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -protected
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_processRequest">
+        processRequest()
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processRequest" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/AbstractMiddleware.php"><a href="files/src-abstractmiddleware.html"><abbr title="src/AbstractMiddleware.php">AbstractMiddleware.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">78</span>
+
+            <a href="classes/OCC-PSR15-AbstractMiddleware.html#source-view.78" class="phpdocumentor-element-found-in__source" data-line="78" data-modal="source-view" data-src="files/src/AbstractMiddleware.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Process an incoming server request before delegating to next middleware.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">protected</span>
+                    <span class="phpdocumentor-signature__name">processRequest</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$request</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$request</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The incoming server request</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The processed server request</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -protected
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_processResponse">
+        processResponse()
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processResponse" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/AbstractMiddleware.php"><a href="files/src-abstractmiddleware.html"><abbr title="src/AbstractMiddleware.php">AbstractMiddleware.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">90</span>
+
+            <a href="classes/OCC-PSR15-AbstractMiddleware.html#source-view.90" class="phpdocumentor-element-found-in__source" data-line="90" data-modal="source-view" data-src="files/src/AbstractMiddleware.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Process an incoming response before returning it to previous middleware.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">protected</span>
+                    <span class="phpdocumentor-signature__name">processResponse</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$response</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$response</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The incoming response</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The processed response</p>
+</section>
+
+            </section>
+
+</article>
+            </section>
+
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/AbstractMiddleware.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                                
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                <li><a href="classes/OCC-PSR15-AbstractMiddleware.html#toc-methods">Methods</a></li>
+                                    </ul>
+            </li>
+            
+            
+                        <li class="phpdocumentor-on-this-page-section__title">Methods</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                            <li class=""><a href="classes/OCC-PSR15-AbstractMiddleware.html#method___invoke">__invoke()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-AbstractMiddleware.html#method_process">process()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processRequest">processRequest()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processResponse">processResponse()</a></li>
+                                    </ul>
+            </li>
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="classes/OCC-PSR15-AbstractMiddleware.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
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+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/classes/OCC-PSR15-MiddlewareQueue.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-psr15.html">PSR15</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -class">
+        <h2 class="phpdocumentor-content__title">
+    MiddlewareQueue
+
+        <span class="phpdocumentor-element__extends">
+        extends <abbr title="\OCC\Basics\DataStructures\StrictQueue">StrictQueue</abbr>
+    </span>
+    
+            <div class="phpdocumentor-element__package">
+            in package
+            <ul class="phpdocumentor-breadcrumbs">
+                                    <li class="phpdocumentor-breadcrumb"><a href="packages/PSR15.html">PSR15</a></li>
+                            </ul>
+        </div>
+    
+    
+            <span class="phpdocumentor-element__extends">
+            uses
+                            <abbr title="\OCC\Basics\Traits\Singleton">Singleton</abbr>                    </span>
+    </h2>
+
+<div class="phpdocumentor-label-line">
+
+
+</div>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/MiddlewareQueue.php"><a href="files/src-middlewarequeue.html"><abbr title="src/MiddlewareQueue.php">MiddlewareQueue.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">39</span>
+
+            <a href="classes/OCC-PSR15-MiddlewareQueue.html#source-view.39" class="phpdocumentor-element-found-in__source" data-line="39" data-modal="source-view" data-src="files/src/MiddlewareQueue.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">Queue of PSR-15 Middlewares to process HTTP Server Requests.</p>
+
+
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-PSR15-MiddlewareQueue.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-PSR15-MiddlewareQueue.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+<h4 id="toc-methods">
+    Methods
+    <a href="classes/OCC-PSR15-MiddlewareQueue.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-MiddlewareQueue.html#method_getInstance">getInstance()</a>
+    <span>
+                                &nbsp;: static    </span>
+</dt>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -private">
+    <a class="" href="classes/OCC-PSR15-MiddlewareQueue.html#method___construct">__construct()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Create a queue of PSR-15 compatible middlewares.</dd>
+
+    </dl>
+
+
+
+        
+
+        
+
+            <section class="phpdocumentor-methods">
+        <h3 class="phpdocumentor-elements__header" id="methods">
+            Methods
+            <a href="classes/OCC-PSR15-MiddlewareQueue.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                    -static                    "
+>
+    <h4 class="phpdocumentor-element__name" id="method_getInstance">
+        getInstance()
+        <a href="classes/OCC-PSR15-MiddlewareQueue.html#method_getInstance" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/MiddlewareQueue.php"><a href="files/src-middlewarequeue.html"><abbr title="src/MiddlewareQueue.php">MiddlewareQueue.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">0</span>
+
+            <a href="classes/OCC-PSR15-MiddlewareQueue.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/MiddlewareQueue.php.txt"></a>
+    </aside>
+
+    
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+            <span class="phpdocumentor-signature__static">static</span>        <span class="phpdocumentor-signature__name">getInstance</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">iterable&lt;string|int, <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$middlewares</span><span> = </span><span class="phpdocumentor-signature__argument__default-value"></span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">static</span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$middlewares</span>
+                : <span class="phpdocumentor-signature__argument__return-type">iterable&lt;string|int, <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value"></span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">static</span>
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -private
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method___construct">
+        __construct()
+        <a href="classes/OCC-PSR15-MiddlewareQueue.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/MiddlewareQueue.php"><a href="files/src-middlewarequeue.html"><abbr title="src/MiddlewareQueue.php">MiddlewareQueue.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">50</span>
+
+            <a href="classes/OCC-PSR15-MiddlewareQueue.html#source-view.50" class="phpdocumentor-element-found-in__source" data-line="50" data-modal="source-view" data-src="files/src/MiddlewareQueue.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Create a queue of PSR-15 compatible middlewares.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">private</span>
+                    <span class="phpdocumentor-signature__name">__construct</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">iterable&lt;string|int, <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$middlewares</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$middlewares</span>
+                : <span class="phpdocumentor-signature__argument__return-type">iterable&lt;string|int, <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Initial set of PSR-15 middlewares</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+    
+</article>
+            </section>
+
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/MiddlewareQueue.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
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+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                                
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                <li><a href="classes/OCC-PSR15-MiddlewareQueue.html#toc-methods">Methods</a></li>
+                                    </ul>
+            </li>
+            
+            
+                        <li class="phpdocumentor-on-this-page-section__title">Methods</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                            <li class=""><a href="classes/OCC-PSR15-MiddlewareQueue.html#method_getInstance">getInstance()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-MiddlewareQueue.html#method___construct">__construct()</a></li>
+                                    </ul>
+            </li>
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="classes/OCC-PSR15-MiddlewareQueue.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/classes/OCC-PSR15-QueueRequestHandler.html

@@ -0,0 +1,818 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-psr15.html">PSR15</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -class">
+        <h2 class="phpdocumentor-content__title">
+    QueueRequestHandler
+
+    
+            <div class="phpdocumentor-element__package">
+            in package
+            <ul class="phpdocumentor-breadcrumbs">
+                                    <li class="phpdocumentor-breadcrumb"><a href="packages/PSR15.html">PSR15</a></li>
+                            </ul>
+        </div>
+    
+            <span class="phpdocumentor-element__implements">
+            implements
+                            <abbr title="\Psr\Http\Server\RequestHandlerInterface">RequestHandlerInterface</abbr>                    </span>
+    
+            <span class="phpdocumentor-element__extends">
+            uses
+                            <abbr title="\OCC\Basics\Traits\Getter">Getter</abbr>                    </span>
+    </h2>
+
+<div class="phpdocumentor-label-line">
+
+
+</div>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">54</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.54" class="phpdocumentor-element-found-in__source" data-line="54" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">A queue-based PSR-15 HTTP Server Request Handler.</p>
+
+
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-PSR15-QueueRequestHandler.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+    <h4 id="toc-interfaces">
+        Interfaces
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#toc-interfaces" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Psr\Http\Server\RequestHandlerInterface">RequestHandlerInterface</abbr></dt>    </dl>
+
+
+
+
+
+
+<h4 id="toc-properties">
+    Properties
+    <a href="classes/OCC-PSR15-QueueRequestHandler.html#toc-properties" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -property -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#property_queue">$queue</a>
+    <span>
+                        &nbsp;: <a href="classes/OCC-PSR15-MiddlewareQueue.html"><abbr title="\OCC\PSR15\MiddlewareQueue">MiddlewareQueue</abbr></a>            </span>
+</dt>
+
+            <dt class="phpdocumentor-table-of-contents__entry -property -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#property_request">$request</a>
+    <span>
+                        &nbsp;: <abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>            </span>
+</dt>
+
+            <dt class="phpdocumentor-table-of-contents__entry -property -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#property_response">$response</a>
+    <span>
+                        &nbsp;: <abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>            </span>
+</dt>
+
+    </dl>
+
+<h4 id="toc-methods">
+    Methods
+    <a href="classes/OCC-PSR15-QueueRequestHandler.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#method___construct">__construct()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Create a queue-based PSR-15 HTTP Server Request Handler.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#method___invoke">__invoke()</a>
+    <span>
+                                &nbsp;: <abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>    </span>
+</dt>
+<dd>Allow the request handler to be invoked directly.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#method_handle">handle()</a>
+    <span>
+                                &nbsp;: <abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr>    </span>
+</dt>
+<dd>Handles a request by invoking a queue of middlewares.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/OCC-PSR15-QueueRequestHandler.html#method_respond">respond()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Return the current response to the client.</dd>
+
+    </dl>
+
+
+
+        
+
+        
+    <section class="phpdocumentor-properties">
+        <h3 class="phpdocumentor-elements__header" id="properties">
+            Properties
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#properties" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="
+            phpdocumentor-element
+            -property
+            -public
+                                                -read-only        "
+>
+    <h4 class="phpdocumentor-element__name" id="property_queue">
+        $queue
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#property_queue" class="headerlink"><i class="fas fa-link"></i></a>
+
+        <span class="phpdocumentor-element__modifiers">
+                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">0</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+    
+    
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+        <span class="phpdocumentor-signature__type"><a href="classes/OCC-PSR15-MiddlewareQueue.html"><abbr title="\OCC\PSR15\MiddlewareQueue">MiddlewareQueue</abbr></a></span>
+    <span class="phpdocumentor-signature__name">$queue</span>
+    </code>
+
+    
+    
+    
+
+    
+
+</article>
+                    <article
+        class="
+            phpdocumentor-element
+            -property
+            -public
+                                                -read-only        "
+>
+    <h4 class="phpdocumentor-element__name" id="property_request">
+        $request
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#property_request" class="headerlink"><i class="fas fa-link"></i></a>
+
+        <span class="phpdocumentor-element__modifiers">
+                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">0</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+    
+    
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+        <span class="phpdocumentor-signature__type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr></span>
+    <span class="phpdocumentor-signature__name">$request</span>
+    </code>
+
+    
+    
+    
+
+    
+
+</article>
+                    <article
+        class="
+            phpdocumentor-element
+            -property
+            -public
+                                                -read-only        "
+>
+    <h4 class="phpdocumentor-element__name" id="property_response">
+        $response
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#property_response" class="headerlink"><i class="fas fa-link"></i></a>
+
+        <span class="phpdocumentor-element__modifiers">
+                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">0</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+    
+    
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+        <span class="phpdocumentor-signature__type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+    <span class="phpdocumentor-signature__name">$response</span>
+    </code>
+
+    
+    
+    
+
+    
+
+</article>
+            </section>
+
+            <section class="phpdocumentor-methods">
+        <h3 class="phpdocumentor-elements__header" id="methods">
+            Methods
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method___construct">
+        __construct()
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">225</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.225" class="phpdocumentor-element-found-in__source" data-line="225" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Create a queue-based PSR-15 HTTP Server Request Handler.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">__construct</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">iterable&lt;string|int, <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$middlewares</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$middlewares</span>
+                : <span class="phpdocumentor-signature__argument__return-type">iterable&lt;string|int, <abbr title="\Psr\Http\Server\MiddlewareInterface">MiddlewareInterface</abbr>&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Initial set of middlewares</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method___invoke">
+        __invoke()
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#method___invoke" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">239</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.239" class="phpdocumentor-element-found-in__source" data-line="239" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Allow the request handler to be invoked directly.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">__invoke</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$request</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">null</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$request</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>|null</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">null</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The PSR-7 server request to handle</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>A PSR-7 compatible HTTP response</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_handle">
+        handle()
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#method_handle" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">94</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.94" class="phpdocumentor-element-found-in__source" data-line="94" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Handles a request by invoking a queue of middlewares.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">handle</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$request</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">null</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$request</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\Psr\Http\Message\ServerRequestInterface">ServerRequestInterface</abbr>|null</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">null</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The PSR-7 server request to handle</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\Psr\Http\Message\ResponseInterface">ResponseInterface</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>A PSR-7 compatible HTTP response</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_respond">
+        respond()
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#method_respond" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/QueueRequestHandler.php"><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">141</span>
+
+            <a href="classes/OCC-PSR15-QueueRequestHandler.html#source-view.141" class="phpdocumentor-element-found-in__source" data-line="141" data-modal="source-view" data-src="files/src/QueueRequestHandler.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Return the current response to the client.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">respond</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$exitCode</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">null</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$exitCode</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int|null</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">null</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Exit status after sending out the response or NULL to continue</p>
+<p>Must be in the range 0 to 254. The status 0 is used to terminate the program successfully.</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#method_respond#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if headers were already sent</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+
+    
+</article>
+            </section>
+
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/QueueRequestHandler.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                                
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                            <li><a href="classes/OCC-PSR15-QueueRequestHandler.html#toc-properties">Properties</a></li>
+                                                            <li><a href="classes/OCC-PSR15-QueueRequestHandler.html#toc-methods">Methods</a></li>
+                                    </ul>
+            </li>
+            
+                            <li class="phpdocumentor-on-this-page-section__title">Properties</li>
+                <li>
+                    <ul class="phpdocumentor-list -clean">
+                                                    <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#property_queue">$queue</li>
+                                                    <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#property_request">$request</li>
+                                                    <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#property_response">$response</li>
+                                            </ul>
+                </li>
+            
+                        <li class="phpdocumentor-on-this-page-section__title">Methods</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                            <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#method___construct">__construct()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#method___invoke">__invoke()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#method_handle">handle()</a></li>
+                                            <li class=""><a href="classes/OCC-PSR15-QueueRequestHandler.html#method_respond">respond()</a></li>
+                                    </ul>
+            </li>
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="classes/OCC-PSR15-QueueRequestHandler.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/css/normalize.css

@@ -0,0 +1,427 @@
+/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
+
+/**
+ * 1. Set default font family to sans-serif.
+ * 2. Prevent iOS text size adjust after orientation change, without disabling
+ *    user zoom.
+ */
+
+html {
+    font-family: sans-serif; /* 1 */
+    -ms-text-size-adjust: 100%; /* 2 */
+    -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/**
+ * Remove default margin.
+ */
+
+body {
+    margin: 0;
+}
+
+/* HTML5 display definitions
+   ========================================================================== */
+
+/**
+ * Correct `block` display not defined for any HTML5 element in IE 8/9.
+ * Correct `block` display not defined for `details` or `summary` in IE 10/11
+ * and Firefox.
+ * Correct `block` display not defined for `main` in IE 11.
+ */
+
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+hgroup,
+main,
+menu,
+nav,
+section,
+summary {
+    display: block;
+}
+
+/**
+ * 1. Correct `inline-block` display not defined in IE 8/9.
+ * 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
+ */
+
+audio,
+canvas,
+progress,
+video {
+    display: inline-block; /* 1 */
+    vertical-align: baseline; /* 2 */
+}
+
+/**
+ * Prevent modern browsers from displaying `audio` without controls.
+ * Remove excess height in iOS 5 devices.
+ */
+
+audio:not([controls]) {
+    display: none;
+    height: 0;
+}
+
+/**
+ * Address `[hidden]` styling not present in IE 8/9/10.
+ * Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
+ */
+
+[hidden],
+template {
+    display: none !important;
+}
+
+/* Links
+   ========================================================================== */
+
+/**
+ * Remove the gray background color from active links in IE 10.
+ */
+
+a {
+    background-color: transparent;
+}
+
+/**
+ * Improve readability when focused and also mouse hovered in all browsers.
+ */
+
+a:active,
+a:hover {
+    outline: 0;
+}
+
+/* Text-level semantics
+   ========================================================================== */
+
+/**
+ * Address styling not present in IE 8/9/10/11, Safari, and Chrome.
+ */
+
+abbr[title] {
+    border-bottom: 1px dotted;
+}
+
+/**
+ * Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
+ */
+
+b,
+strong {
+    font-weight: bold;
+}
+
+/**
+ * Address styling not present in Safari and Chrome.
+ */
+
+dfn {
+    font-style: italic;
+}
+
+/**
+ * Address variable `h1` font-size and margin within `section` and `article`
+ * contexts in Firefox 4+, Safari, and Chrome.
+ */
+
+h1 {
+    font-size: 2em;
+    margin: 0.67em 0;
+}
+
+/**
+ * Address styling not present in IE 8/9.
+ */
+
+mark {
+    background: #ff0;
+    color: #000;
+}
+
+/**
+ * Address inconsistent and variable font size in all browsers.
+ */
+
+small {
+    font-size: 80%;
+}
+
+/**
+ * Prevent `sub` and `sup` affecting `line-height` in all browsers.
+ */
+
+sub,
+sup {
+    font-size: 75%;
+    line-height: 0;
+    position: relative;
+    vertical-align: baseline;
+}
+
+sup {
+    top: -0.5em;
+}
+
+sub {
+    bottom: -0.25em;
+}
+
+/* Embedded content
+   ========================================================================== */
+
+/**
+ * Remove border when inside `a` element in IE 8/9/10.
+ */
+
+img {
+    border: 0;
+}
+
+/**
+ * Correct overflow not hidden in IE 9/10/11.
+ */
+
+svg:not(:root) {
+    overflow: hidden;
+}
+
+/* Grouping content
+   ========================================================================== */
+
+/**
+ * Address margin not present in IE 8/9 and Safari.
+ */
+
+figure {
+    margin: 1em 40px;
+}
+
+/**
+ * Address differences between Firefox and other browsers.
+ */
+
+hr {
+    -moz-box-sizing: content-box;
+    box-sizing: content-box;
+    height: 0;
+}
+
+/**
+ * Contain overflow in all browsers.
+ */
+
+pre {
+    overflow: auto;
+}
+
+/**
+ * Address odd `em`-unit font size rendering in all browsers.
+ */
+
+code,
+kbd,
+pre,
+samp {
+    font-family: var(--font-monospace);
+    font-size: 1em;
+}
+
+/* Forms
+   ========================================================================== */
+
+/**
+ * Known limitation: by default, Chrome and Safari on OS X allow very limited
+ * styling of `select`, unless a `border` property is set.
+ */
+
+/**
+ * 1. Correct color not being inherited.
+ *    Known issue: affects color of disabled elements.
+ * 2. Correct font properties not being inherited.
+ * 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
+ */
+
+button,
+input,
+optgroup,
+select,
+textarea {
+    color: inherit; /* 1 */
+    font: inherit; /* 2 */
+    margin: 0; /* 3 */
+}
+
+/**
+ * Address `overflow` set to `hidden` in IE 8/9/10/11.
+ */
+
+button {
+    overflow: visible;
+}
+
+/**
+ * Address inconsistent `text-transform` inheritance for `button` and `select`.
+ * All other form control elements do not inherit `text-transform` values.
+ * Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
+ * Correct `select` style inheritance in Firefox.
+ */
+
+button,
+select {
+    text-transform: none;
+}
+
+/**
+ * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
+ *    and `video` controls.
+ * 2. Correct inability to style clickable `input` types in iOS.
+ * 3. Improve usability and consistency of cursor style between image-type
+ *    `input` and others.
+ */
+
+button,
+html input[type="button"], /* 1 */
+input[type="reset"],
+input[type="submit"] {
+    -webkit-appearance: button; /* 2 */
+    cursor: pointer; /* 3 */
+}
+
+/**
+ * Re-set default cursor for disabled elements.
+ */
+
+button[disabled],
+html input[disabled] {
+    cursor: default;
+}
+
+/**
+ * Remove inner padding and border in Firefox 4+.
+ */
+
+button::-moz-focus-inner,
+input::-moz-focus-inner {
+    border: 0;
+    padding: 0;
+}
+
+/**
+ * Address Firefox 4+ setting `line-height` on `input` using `!important` in
+ * the UA stylesheet.
+ */
+
+input {
+    line-height: normal;
+}
+
+/**
+ * It's recommended that you don't attempt to style these elements.
+ * Firefox's implementation doesn't respect box-sizing, padding, or width.
+ *
+ * 1. Address box sizing set to `content-box` in IE 8/9/10.
+ * 2. Remove excess padding in IE 8/9/10.
+ */
+
+input[type="checkbox"],
+input[type="radio"] {
+    box-sizing: border-box; /* 1 */
+    padding: 0; /* 2 */
+}
+
+/**
+ * Fix the cursor style for Chrome's increment/decrement buttons. For certain
+ * `font-size` values of the `input`, it causes the cursor style of the
+ * decrement button to change from `default` to `text`.
+ */
+
+input[type="number"]::-webkit-inner-spin-button,
+input[type="number"]::-webkit-outer-spin-button {
+    height: auto;
+}
+
+/**
+ * 1. Address `appearance` set to `searchfield` in Safari and Chrome.
+ * 2. Address `box-sizing` set to `border-box` in Safari and Chrome
+ *    (include `-moz` to future-proof).
+ */
+
+input[type="search"] {
+    -webkit-appearance: textfield; /* 1 */
+    -moz-box-sizing: content-box;
+    -webkit-box-sizing: content-box; /* 2 */
+    box-sizing: content-box;
+}
+
+/**
+ * Remove inner padding and search cancel button in Safari and Chrome on OS X.
+ * Safari (but not Chrome) clips the cancel button when the search input has
+ * padding (and `textfield` appearance).
+ */
+
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+    -webkit-appearance: none;
+}
+
+/**
+ * Define consistent border, margin, and padding.
+ */
+
+fieldset {
+    border: 1px solid #c0c0c0;
+    margin: 0 2px;
+    padding: 0.35em 0.625em 0.75em;
+}
+
+/**
+ * 1. Correct `color` not being inherited in IE 8/9/10/11.
+ * 2. Remove padding so people aren't caught out if they zero out fieldsets.
+ */
+
+legend {
+    border: 0; /* 1 */
+    padding: 0; /* 2 */
+}
+
+/**
+ * Remove default vertical scrollbar in IE 8/9/10/11.
+ */
+
+textarea {
+    overflow: auto;
+}
+
+/**
+ * Don't inherit the `font-weight` (applied by a rule above).
+ * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
+ */
+
+optgroup {
+    font-weight: bold;
+}
+
+/* Tables
+   ========================================================================== */
+
+/**
+ * Remove most spacing between table cells.
+ */
+
+table {
+    border-collapse: collapse;
+    border-spacing: 0;
+}
+
+td,
+th {
+    padding: 0;
+}

doc/css/template.css

@@ -0,0 +1,409 @@
+
+.phpdocumentor-content {
+    position: relative;
+    display: flex;
+    gap: var(--spacing-md);
+}
+
+.phpdocumentor-content > section:first-of-type {
+    width: 75%;
+    flex: 1 1 auto;
+}
+
+@media (min-width: 1900px) {
+    .phpdocumentor-content > section:first-of-type {
+        width: 100%;
+        flex: 1 1 auto;
+    }
+}
+
+.phpdocumentor .phpdocumentor-content__title {
+    margin-top: 0;
+}
+.phpdocumentor-summary {
+    font-style: italic;
+}
+.phpdocumentor-description {
+    margin-bottom: var(--spacing-md);
+}
+.phpdocumentor-element {
+    position: relative;
+}
+
+.phpdocumentor-element .phpdocumentor-element {
+    border: 1px solid var(--primary-color-lighten);
+    margin-bottom: var(--spacing-md);
+    padding: var(--spacing-xs);
+    border-radius: 5px;
+}
+
+.phpdocumentor-element.-deprecated .phpdocumentor-element__name {
+    text-decoration: line-through;
+}
+
+@media (min-width: 550px) {
+    .phpdocumentor-element .phpdocumentor-element {
+        margin-bottom: var(--spacing-lg);
+        padding: var(--spacing-md);
+    }
+}
+
+.phpdocumentor-element__modifier {
+    font-size: var(--text-xxs);
+    padding: calc(var(--spacing-base-size) / 4) calc(var(--spacing-base-size) / 2);
+    color: var(--text-color);
+    background-color: var(--light-gray);
+    border-radius: 3px;
+    text-transform: uppercase;
+}
+
+.phpdocumentor .phpdocumentor-elements__header {
+    margin-top: var(--spacing-xxl);
+    margin-bottom: var(--spacing-lg);
+}
+
+.phpdocumentor .phpdocumentor-element__name {
+    line-height: 1;
+    margin-top: 0;
+    font-weight: 300;
+    font-size: var(--text-lg);
+    word-break: break-all;
+    margin-bottom: var(--spacing-sm);
+}
+
+@media (min-width: 550px) {
+    .phpdocumentor .phpdocumentor-element__name {
+        font-size: var(--text-xl);
+        margin-bottom: var(--spacing-xs);
+    }
+}
+
+@media (min-width: 1200px) {
+    .phpdocumentor .phpdocumentor-element__name {
+        margin-bottom: var(--spacing-md);
+    }
+}
+
+.phpdocumentor-element__package,
+.phpdocumentor-element__extends,
+.phpdocumentor-element__implements {
+    display: block;
+    font-size: var(--text-xxs);
+    font-weight: normal;
+    opacity: .7;
+}
+
+.phpdocumentor-element__package .phpdocumentor-breadcrumbs {
+    display: inline;
+}
+.phpdocumentor .phpdocumentor-signature {
+    display: block;
+    font-size: var(--text-sm);
+    border: 1px solid #f0f0f0;
+}
+
+.phpdocumentor .phpdocumentor-signature.-deprecated .phpdocumentor-signature__name {
+    text-decoration: line-through;
+}
+
+@media (min-width: 550px) {
+    .phpdocumentor .phpdocumentor-signature {
+        margin-left: calc(var(--spacing-xl) * -1);
+        width: calc(100% + var(--spacing-xl));
+    }
+}
+
+.phpdocumentor-table-of-contents {
+}
+
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry {
+    margin-bottom: var(--spacing-xxs);
+    margin-left: 2rem;
+    display: flex;
+}
+
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry > a {
+    flex: 0 1 auto;
+}
+
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry > a.-deprecated {
+    text-decoration: line-through;
+}
+
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry > span {
+    flex: 1;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    overflow: hidden;
+}
+
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry:after {
+    content: '';
+    height: 12px;
+    width: 12px;
+    left: 16px;
+    position: absolute;
+}
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry.-private:after {
+    background: url('data:image/svg+xml;utf8,<svg width="8" height="10" viewBox="0 0 8 10" fill="none" xmlns="http://www.w3.org/2000/svg"><rect y="4" width="8" height="6" rx="1.4" fill="%23EE6749"/><path d="M2 4C2 3 2.4 1 4 1C5.6 1 6 3 6 4" stroke="%23EE6749" stroke-width="1.4"/></svg>') no-repeat;
+}
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry.-protected:after {
+    left: 13px;
+    background: url('data:image/svg+xml;utf8,<svg width="11" height="9" viewBox="0 0 11 9" fill="none" xmlns="http://www.w3.org/2000/svg"><rect x="3" y="3" width="8" height="6" rx="1.4" fill="%23EE9949"/><path d="M5 4C5 3 4.6 1 3 1C1.4 1 1 3 1 4" stroke="%23EE9949" stroke-width="1.4"/></svg>') no-repeat;
+}
+
+.phpdocumentor-table-of-contents .phpdocumentor-table-of-contents__entry:before {
+    width: 1.25rem;
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doc/files/src-abstractmiddleware.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
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+    <link rel="icon" href="images/favicon.ico"/>
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+</h4>
+    <ul class="phpdocumentor-list">
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+                
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+                
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+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
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+            </ul>
+
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+</h4>
+
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+                
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+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
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+</h4>
+
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+            
+    <section class="phpdocumentor-sidebar__category -reports">
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+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -file">
+        <h2 class="phpdocumentor-content__title">AbstractMiddleware.php</h2>
+
+            <p class="phpdocumentor-summary">Queue-based PSR-15 HTTP Server Request Handler
+Copyright (C) 2023 Sebastian Meyer &lt;sebastian.meyer@opencultureconsulting.com&gt;</p>
+
+
+    <section class="phpdocumentor-description"><p>This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.</p>
+<p>This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.</p>
+<p>You should have received a copy of the GNU General Public License
+along with this program.  If not, see <a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>.</p>
+</section>
+
+
+
+
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="files/src-abstractmiddleware.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
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+
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+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-AbstractMiddleware.html"><abbr title="\OCC\PSR15\AbstractMiddleware">AbstractMiddleware</abbr></a></dt><dd>Abstract class implementing \Psr\Http\Server\MiddlewareInterface.</dd>    </dl>
+
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+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
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+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                        <li><a href="files/src-abstractmiddleware.html#toc-classes">Classes</a></li>
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doc/files/src-middlewarequeue.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+    <link rel="icon" href="images/favicon.ico"/>
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+            <link rel="preconnect" href="https://fonts.gstatic.com">
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+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
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+    <main class="phpdocumentor">
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+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
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+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
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+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -file">
+        <h2 class="phpdocumentor-content__title">MiddlewareQueue.php</h2>
+
+            <p class="phpdocumentor-summary">Queue-based PSR-15 HTTP Server Request Handler
+Copyright (C) 2023 Sebastian Meyer &lt;sebastian.meyer@opencultureconsulting.com&gt;</p>
+
+
+    <section class="phpdocumentor-description"><p>This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.</p>
+<p>This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.</p>
+<p>You should have received a copy of the GNU General Public License
+along with this program.  If not, see <a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>.</p>
+</section>
+
+
+
+
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="files/src-middlewarequeue.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+    <h4 id="toc-classes">
+        Classes
+        <a href="files/src-middlewarequeue.html#toc-classes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-MiddlewareQueue.html"><abbr title="\OCC\PSR15\MiddlewareQueue">MiddlewareQueue</abbr></a></dt><dd>Queue of PSR-15 Middlewares to process HTTP Server Requests.</dd>    </dl>
+
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+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
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+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                        <li><a href="files/src-middlewarequeue.html#toc-classes">Classes</a></li>
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+</body>
+</html>

doc/files/src-queuerequesthandler.html

@@ -0,0 +1,347 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
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+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
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+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
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+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
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+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
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+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
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+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
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+
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+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
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+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -file">
+        <h2 class="phpdocumentor-content__title">QueueRequestHandler.php</h2>
+
+            <p class="phpdocumentor-summary">Queue-based PSR-15 HTTP Server Request Handler
+Copyright (C) 2023 Sebastian Meyer &lt;sebastian.meyer@opencultureconsulting.com&gt;</p>
+
+
+    <section class="phpdocumentor-description"><p>This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.</p>
+<p>This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.</p>
+<p>You should have received a copy of the GNU General Public License
+along with this program.  If not, see <a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>.</p>
+</section>
+
+
+
+
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="files/src-queuerequesthandler.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+    <h4 id="toc-classes">
+        Classes
+        <a href="files/src-queuerequesthandler.html#toc-classes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-QueueRequestHandler.html"><abbr title="\OCC\PSR15\QueueRequestHandler">QueueRequestHandler</abbr></a></dt><dd>A queue-based PSR-15 HTTP Server Request Handler.</dd>    </dl>
+
+
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
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+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/QueueRequestHandler.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
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+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                        <li><a href="files/src-queuerequesthandler.html#toc-classes">Classes</a></li>
+                                                                                                                    </ul>
+            </li>
+
+            
+                    </ul>
+    </section>
+
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+</body>
+</html>

doc/files/src/AbstractMiddleware.php.txt

@@ -0,0 +1,107 @@
+<?php
+
+/**
+ * Queue-based PSR-15 HTTP Server Request Handler
+ * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\PSR15;
+
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface as RequestHandler;
+
+/**
+ * Abstract class implementing \Psr\Http\Server\MiddlewareInterface.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package PSR15
+ */
+abstract class AbstractMiddleware implements MiddlewareInterface
+{
+    /**
+     * The PSR-15 Server Request Handler.
+     *
+     * @var QueueRequestHandler
+     *
+     * @internal
+     */
+    protected QueueRequestHandler $requestHandler;
+
+    /**
+     * Process an incoming server request and produce a response.
+     *
+     * @param ServerRequest $request The server request to process
+     * @param RequestHandler $handler The request handler to delegate to
+     *
+     * @return Response The response object
+     *
+     * @api
+     */
+    final public function process(ServerRequest $request, RequestHandler $handler): Response
+    {
+        /** @var QueueRequestHandler $handler */
+        $this->requestHandler = $handler;
+        // Manipulate request if necessary.
+        $request = $this->processRequest($request);
+        // Delegate request to next middleware and get response.
+        $response = $handler->handle($request);
+        // Manipulate response if necessary.
+        $response = $this->processResponse($response);
+        // Return response to previous middleware.
+        return $response;
+    }
+
+    /**
+     * Process an incoming server request before delegating to next middleware.
+     *
+     * @param ServerRequest $request The incoming server request
+     *
+     * @return ServerRequest The processed server request
+     */
+    protected function processRequest(ServerRequest $request): ServerRequest
+    {
+        return $request;
+    }
+
+    /**
+     * Process an incoming response before returning it to previous middleware.
+     *
+     * @param Response $response The incoming response
+     *
+     * @return Response The processed response
+     */
+    protected function processResponse(Response $response): Response
+    {
+        return $response;
+    }
+
+    /**
+     * Allow the middleware to be invoked directly.
+     *
+     * @param ServerRequest $request The server request to process
+     * @param RequestHandler $handler The request handler to delegate to
+     *
+     * @return Response The response object
+     */
+    final public function __invoke(ServerRequest $request, RequestHandler $handler): Response
+    {
+        return $this->process($request, $handler);
+    }
+}

doc/files/src/MiddlewareQueue.php.txt

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Queue-based PSR-15 HTTP Server Request Handler
+ * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\PSR15;
+
+use OCC\Basics\DataStructures\StrictQueue;
+use OCC\Basics\Traits\Singleton;
+use Psr\Http\Server\MiddlewareInterface as Middleware;
+
+/**
+ * Queue of PSR-15 Middlewares to process HTTP Server Requests.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package PSR15
+ *
+ * @method static static getInstance(iterable<\Psr\Http\Server\MiddlewareInterface> $middlewares)
+ *
+ * @extends StrictQueue<Middleware>
+ */
+class MiddlewareQueue extends StrictQueue
+{
+    use Singleton;
+
+    /**
+     * Create a queue of PSR-15 compatible middlewares.
+     *
+     * @param iterable<array-key, Middleware> $middlewares Initial set of PSR-15 middlewares
+     *
+     * @return void
+     */
+    private function __construct(iterable $middlewares = [])
+    {
+        parent::__construct([Middleware::class]);
+        $this->append(...$middlewares);
+    }
+}

doc/files/src/QueueRequestHandler.php.txt

@@ -0,0 +1,243 @@
+<?php
+
+/**
+ * Queue-based PSR-15 HTTP Server Request Handler
+ * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\PSR15;
+
+use Exception;
+use RuntimeException;
+use GuzzleHttp\Psr7\Response as GuzzleResponse;
+use GuzzleHttp\Psr7\ServerRequest as GuzzleRequest;
+use OCC\Basics\Traits\Getter;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+use Psr\Http\Server\MiddlewareInterface as Middleware;
+use Psr\Http\Server\RequestHandlerInterface as RequestHandler;
+
+use function array_keys;
+use function count;
+use function filter_var;
+use function get_debug_type;
+use function header;
+use function headers_sent;
+use function is_null;
+use function sprintf;
+
+/**
+ * A queue-based PSR-15 HTTP Server Request Handler.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package PSR15
+ *
+ * @property-read MiddlewareQueue $queue
+ * @property-read ServerRequest $request
+ * @property-read Response $response
+ */
+class QueueRequestHandler implements RequestHandler
+{
+    use Getter;
+
+    /**
+     * The PSR-7 HTTP Server Request.
+     *
+     * @var ServerRequest
+     *
+     * @internal
+     */
+    protected ServerRequest $request;
+
+    /**
+     * The queue of middlewares to process the server request.
+     *
+     * @var MiddlewareQueue
+     *
+     * @internal
+     */
+    protected MiddlewareQueue $queue;
+
+    /**
+     * The PSR-7 HTTP Response.
+     *
+     * @var Response
+     *
+     * @internal
+     */
+    protected Response $response;
+
+    /**
+     * Handles a request by invoking a queue of middlewares.
+     *
+     * @param ?ServerRequest $request The PSR-7 server request to handle
+     *
+     * @return Response A PSR-7 compatible HTTP response
+     *
+     * @api
+     */
+    public function handle(?ServerRequest $request = null): Response
+    {
+        $this->request = $request ?? $this->request;
+        if (count($this->queue) > 0) {
+            $middleware = $this->queue->dequeue();
+            // It is RECOMMENDED that any application using middleware includes a
+            // component that catches exceptions and converts them into responses.
+            // This middleware SHOULD be the first component executed and wrap all
+            // further processing to ensure that a response is always generated.
+            try {
+                $this->response = $middleware->process($this->request, $this);
+            } catch (Exception $exception) {
+                $options = [
+                    'options' => [
+                        'default' => 500,
+                        'min_range' => 100,
+                        'max_range' => 599
+                    ]
+                ];
+                $statusCode = filter_var($exception->getCode(), FILTER_VALIDATE_INT, $options);
+                $this->response = new GuzzleResponse(
+                    $statusCode,
+                    [],
+                    sprintf(
+                        'Exception thrown in middleware %s: %s',
+                        get_debug_type($middleware),
+                        $exception->getMessage()
+                    )
+                );
+            }
+        }
+        return $this->response;
+    }
+
+    /**
+     * Return the current response to the client.
+     *
+     * @param ?int $exitCode Exit status after sending out the response or NULL to continue
+     *
+     *                       Must be in the range 0 to 254. The status 0 is used to terminate the program successfully.
+     *
+     * @return void
+     *
+     * @throws RuntimeException if headers were already sent
+     *
+     * @api
+     */
+    public function respond(?int $exitCode = null): void
+    {
+        $file = 'unknown file';
+        $line = 0;
+        if (headers_sent($file, $line)) {
+            throw new RuntimeException(
+                sprintf(
+                    'Headers already sent in %s on line %d',
+                    $file,
+                    $line
+                )
+            );
+        }
+        header(
+            sprintf(
+                'HTTP/%s %d %s',
+                $this->response->getProtocolVersion(),
+                $this->response->getStatusCode(),
+                $this->response->getReasonPhrase()
+            ),
+            true
+        );
+        foreach (array_keys($this->response->getHeaders()) as $name) {
+            /** @var string $name */
+            $header = sprintf('%s: %s', $name, $this->response->getHeaderLine($name));
+            header($header, false);
+        }
+        echo $this->response->getBody();
+        if (!is_null($exitCode)) {
+            $options = [
+                'options' => [
+                    'default' => 1,
+                    'min_range' => 0,
+                    'max_range' => 254
+                ]
+            ];
+            $exitCode = filter_var($exitCode, FILTER_VALIDATE_INT, $options);
+            exit($exitCode);
+        }
+    }
+
+    /**
+     * Magic getter method for $this->queue.
+     *
+     * @return MiddlewareQueue The queue of PSR-15 middlewares
+     *
+     * @internal
+     */
+    protected function _magicGetQueue(): MiddlewareQueue
+    {
+        return $this->queue;
+    }
+
+    /**
+     * Magic getter method for $this->request.
+     *
+     * @return ServerRequest The PSR-7 server request
+     *
+     * @internal
+     */
+    protected function _magicGetRequest(): ServerRequest
+    {
+        return $this->request;
+    }
+
+    /**
+     * Magic getter method for $this->response.
+     *
+     * @return Response The PSR-7 response
+     *
+     * @internal
+     */
+    protected function _magicGetResponse(): Response
+    {
+        return $this->response;
+    }
+
+    /**
+     * Create a queue-based PSR-15 HTTP Server Request Handler.
+     *
+     * @param iterable<array-key, Middleware> $middlewares Initial set of middlewares
+     *
+     * @return void
+     */
+    public function __construct(iterable $middlewares = [])
+    {
+        $this->request = GuzzleRequest::fromGlobals();
+        $this->queue = MiddlewareQueue::getInstance($middlewares);
+        $this->response = new GuzzleResponse(200);
+    }
+
+    /**
+     * Allow the request handler to be invoked directly.
+     *
+     * @param ?ServerRequest $request The PSR-7 server request to handle
+     *
+     * @return Response A PSR-7 compatible HTTP response
+     */
+    public function __invoke(?ServerRequest $request = null): Response
+    {
+        return $this->handle($request);
+    }
+}

doc/graphs/classes.html

@@ -0,0 +1,176 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
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+</head>
+<body id="top">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
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+
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+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
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+                                                
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
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+</h4>
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+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
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+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
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+    </section>
+
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+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
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+
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+                                        <div class="phpdocumentor-class-graph">
+        <img class="phpdocumentor-class-graph__graph" src="graphs/classes.svg" id="scene" />
+    </div>
+    <script type="text/javascript">
+        var element = document.querySelector('#scene');
+
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+            smoothScroll: false
+        })
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+</section>
+        </div>
+        <a href="graphs/classes.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/guides/changelog.html

@@ -0,0 +1,274 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="changelog">
+            <h1>Changelog</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents">
+        <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/changelog.html#v1-1-0">v1.1.0</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/changelog.html#v1-0-1">v1.0.1</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/changelog.html#v1-0-0">v1.0.0</a>
+
+
+</li>
+
+    </ul>
+</div>
+
+    </div>
+</div>
+
+            <div class="section" id="v1-1-0">
+            <h2>v1.1.0</h2>
+
+            
+    <p><strong>New Features:</strong>
+</p>
+
+            
+
+<ul>
+    <li>Extended <a href="https://opencultureconsulting.github.io/psr-15/">documentation</a></li>
+
+</ul>
+
+            
+    <p><strong>Minor Changes:</strong>
+</p>
+
+            
+
+<ul>
+    <li>Added Composer commands for development tools (PHP_CodeSniffer, PHP-CS-Fixer, PHPStan, Psalm and phpDocumentor)</li>
+
+</ul>
+
+            
+    <p><strong>Maintencance:</strong>
+</p>
+
+            
+
+<ul>
+    <li>Updated dependencies</li>
+
+</ul>
+
+    </div>
+
+            <div class="section" id="v1-0-1">
+            <h2>v1.0.1</h2>
+
+            
+    <p><strong>Maintenance:</strong>
+</p>
+
+            
+
+<ul>
+    <li>Updated dependencies</li>
+
+</ul>
+
+    </div>
+
+            <div class="section" id="v1-0-0">
+            <h2>v1.0.0</h2>
+
+            
+    <p><strong>Initial Release</strong>
+</p>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/guides/index.html

@@ -0,0 +1,263 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="documentation">
+            <h1>Documentation</h1>
+
+            <div class="toc">
+    <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/overview/index.html#overview">Overview</a>
+        <ul class="menu-level-1">
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#queuerequesthandler">QueueRequestHandler</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/middlewarequeue.html#middlewarequeue">MiddlewareQueue</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#abstractmiddleware">AbstractMiddleware</a>
+
+
+</li>
+
+                    </ul>
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/index.html#user-guide">User Guide</a>
+        <ul class="menu-level-1">
+            <li class="toc-item">
+    <a href="guides/usage/requirements.html#requirements">Requirements</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/installation.html#installation">Installation</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/usage.html#usage">Usage</a>
+
+
+</li>
+
+                    </ul>
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/changelog.html#changelog">Changelog</a>
+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/changelog.html#v1-1-0">v1.1.0</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/changelog.html#v1-0-1">v1.0.1</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/changelog.html#v1-0-0">v1.0.0</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    </ul>
+</div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/guides/overview/abstractmiddleware.html

@@ -0,0 +1,292 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
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+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
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+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
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+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
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+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
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+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="abstractmiddleware">
+            <h1>AbstractMiddleware</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents">
+        <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#properties">Properties</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#methods">Methods</a>
+
+        <ul class="section-level-2">
+            <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#processing-a-request">Processing a Request</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#processing-a-response">Processing a Response</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    </ul>
+</div>
+
+    </div>
+</div>
+
+            
+    <p>The <code>AbstractMiddleware</code>
+ is a little helper for creating your own middlewares. It processes the incoming request before
+handing it over to the next middleware in line, and later processes the response before returning it to the previous
+middleware. Originally both methods just return their argument unchanged, so you should implement either one of them or
+both as needed.</p>
+
+            
+    <p>The <code>AbstractMiddleware</code>
+ implements the
+<a href="https://www.php-fig.org/psr/psr-15/#22-psrhttpservermiddlewareinterface">Psr\Http\Server\MiddlewareInterface</a>
+following PHP-FIG&#039;s recommendation <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP Server Request Handlers</a>.</p>
+
+            <div class="section" id="properties">
+            <h2>Properties</h2>
+
+            
+    <p>The <code>AbstractMiddleware</code>
+ has a single protected property <code>AbstractMiddleware::requestHandler</code>
+ referencing the request
+handler which called the middleware. This can be used to access the request and/or response object (as properties of
+<a href="guides/overview/queuerequesthandler.html">QueueRequestHandler</a>) when they are otherwise not available.</p>
+
+    </div>
+
+            <div class="section" id="methods">
+            <h2>Methods</h2>
+
+            
+    <p>The <code>AbstractMiddleware</code>
+ provides one public API method and two protected methods. While the former is final and makes
+sure it implements the <code>Psr\Http\Server\MiddlewareInterface</code>
+, the latter are intended to be extended in your own class.</p>
+
+            
+    <p>The main <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_process"><abbr title="\OCC\PSR15\AbstractMiddleware::process()">AbstractMiddleware::process()</abbr></a>
+ method implements the interface and is also called when
+invoking the middleware object directly. It first passes the incoming request to the
+<a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processRequest"><abbr title="\OCC\PSR15\AbstractMiddleware::processRequest()">AbstractMiddleware::processRequest()</abbr></a>
+ method, then hands over the result to the request handler
+to receive a response, which is then processed by <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processResponse"><abbr title="\OCC\PSR15\AbstractMiddleware::processResponse()">AbstractMiddleware::processResponse()</abbr></a>
+ before
+returning it back to the request handler again.</p>
+
+            <div class="section" id="processing-a-request">
+            <h3>Processing a Request</h3>
+
+            
+    <p>The default method of <code>AbstractMiddleware</code>
+ just returns the request unchanged. If you need to process the request, you
+have to implement your own <code>processRequest()</code>
+ method. It takes a request object as only argument and must return a
+valid request object as well. Just make sure it follows PHP-FIG&#039;s standard recommendation
+<a href="https://www.php-fig.org/psr/psr-7/">PSR-7: HTTP Message Interfaces</a> and implements the
+<a href="https://www.php-fig.org/psr/psr-7/#321-psrhttpmessageserverrequestinterface">Psr\Http\Message\ServerRequestInterface</a>.</p>
+
+    </div>
+
+            <div class="section" id="processing-a-response">
+            <h3>Processing a Response</h3>
+
+            
+    <p>The default method of <code>AbstractMiddleware</code>
+ just returns the response unchanged. If you need to process the response,
+you have to implement your own <code>processResponse()</code>
+ method. It takes a response object as only argument and must return
+a valid response object as well. Just make sure it follows PHP-FIG&#039;s standard recommendation
+<a href="https://www.php-fig.org/psr/psr-7/">PSR-7: HTTP Message Interfaces</a> and implements the
+<a href="https://www.php-fig.org/psr/psr-7/#33-psrhttpmessageresponseinterface">Psr\Http\Message\ResponseInterface</a>.</p>
+
+    </div>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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+</body>
+</html>

doc/guides/overview/index.html

@@ -0,0 +1,252 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
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+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="overview">
+            <h1>Overview</h1>
+
+            
+    <p>The package contains an implementation of <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP Server Request Handlers</a>
+in a queue-based variant. A <a href="guides/overview/queuerequesthandler.html">QueueRequestHandler</a> handles an incoming HTTP request by passing it through a queue
+of one or more middlewares. The <a href="guides/overview/middlewarequeue.html">MiddlewareQueue</a> provides the middlewares in first-in, first-out (FIFO) order,
+i.e. the HTTP request is passed from middleware to middleware preserving the order in which the middlewares were added
+to the queue. An <a href="guides/overview/abstractmiddleware.html">AbstractMiddleware</a> helps developing your own middlewares, but you can also use any middleware
+implementing the <a href="https://packagist.org/packages/psr/http-server-middleware">Psr\Http\Server\MiddlewareInterface</a>.</p>
+
+            
+    <p>All files share the highest coding standards of <a href="https://phpstan.org/">PHPStan</a> and <a href="https://psalm.dev/">Psalm</a>,
+and full <a href="https://www.php-fig.org/psr/psr-12/">PSR-12</a> compliance to make sure they can be combined and easily used
+in other projects.</p>
+
+            <div class="toc">
+    <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#queuerequesthandler">QueueRequestHandler</a>
+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#properties">Properties</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#methods">Methods</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    <li class="toc-item">
+    <a href="guides/overview/middlewarequeue.html#middlewarequeue">MiddlewareQueue</a>
+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/overview/middlewarequeue.html#methods">Methods</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#abstractmiddleware">AbstractMiddleware</a>
+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#properties">Properties</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/abstractmiddleware.html#methods">Methods</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    </ul>
+</div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
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+</body>
+</html>

doc/guides/overview/middlewarequeue.html

@@ -0,0 +1,297 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
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+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
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+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
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+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
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+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
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+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="middlewarequeue">
+            <h1>MiddlewareQueue</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents">
+        <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/overview/middlewarequeue.html#methods">Methods</a>
+
+        <ul class="section-level-2">
+            <li class="toc-item">
+    <a href="guides/overview/middlewarequeue.html#adding-a-middleware">Adding a Middleware</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/middlewarequeue.html#fetching-the-next-in-line">Fetching the next in line</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    </ul>
+</div>
+
+    </div>
+</div>
+
+            
+    <p>The <code>MiddlewareQueue</code>
+ manages the middlewares involved in processing a server request. It makes sure they are called in
+first-in, first-out (FIFO) order, i.e. the same order they were added to the queue. It also ensures all middlewares are
+implementing the <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP Server Request Handlers</a> specification for the
+<a href="https://www.php-fig.org/psr/psr-15/#22-psrhttpservermiddlewareinterface">Psr\Http\Server\MiddlewareInterface</a>.</p>
+
+            
+    <p>When instantiating a <code>MiddlewareQueue</code>
+ it defaults to being empty. But you can optionally pass an iterable set of
+middlewares to the constructor which are then put into the queue. To demonstrate, the following examples both have
+exactly the same result.</p>
+
+            <blockquote>
+    <p>Examples:</p>
+<pre><code class="language-php">use OCC\PSR15\MiddlewareQueue;
+
+$middlewares = [
+    new MiddlewareOne(),
+    new MiddlewareTwo()
+];
+
+$queue = new MiddlewareQueue($middlewares);</code></pre>
+<pre><code class="language-php">use OCC\PSR15\MiddlewareQueue;
+
+$queue = new MiddlewareQueue();
+
+$queue-&gt;enqueue(new MiddlewareOne());
+$queue-&gt;enqueue(new MiddlewareTwo());</code></pre>
+</blockquote>
+
+            
+    <p>The <code>MiddlewareQueue</code>
+ is based on a
+<a href="https://opencultureconsulting.github.io/php-basics/guides/overview/datastructures.html#strictqueue">OCC\Basics\DataStructures\StrictQueue</a>.</p>
+
+            <div class="section" id="methods">
+            <h2>Methods</h2>
+
+            
+    <p>The <code>MiddlewareQueue</code>
+ provides a set of API methods, with <code>MiddlewareQueue::enqueue()</code>
+ and <code>MiddlewareQueue::dequeue()</code>
+
+being the most relevant ones. The former will add a new item at the end of the queue while the latter removes and
+returns the first item from the queue.</p>
+
+            
+    <p>For a complete API documentation have a look at the
+<a href="https://opencultureconsulting.github.io/php-basics/classes/OCC-Basics-DataStructures-StrictQueue.html">StrictQueue</a>.</p>
+
+            <div class="section" id="adding-a-middleware">
+            <h3>Adding a Middleware</h3>
+
+            
+    <p>Invoking <code>MiddlewareQueue::enqueue()</code>
+ will add a middleware at the end of the queue. The only argument must be a
+middleware object implementing the <code>Psr\Http\Server\MiddlewareInterface</code>
+. If the given argument does not meet the
+criterion an <code>OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException</code>
+ is thrown.</p>
+
+            
+    <p>Have a look at the <a href="guides/overview/abstractmiddleware.html">AbstractMiddleware</a> for an easy way to create your own middlewares!</p>
+
+    </div>
+
+            <div class="section" id="fetching-the-next-in-line">
+            <h3>Fetching the next in line</h3>
+
+            
+    <p>Calling <code>MiddlewareQueue::dequeue()</code>
+ will return the first middleware from the queue, i.e. the oldest one on the queue.
+Also, this middleware is removed from the queue.</p>
+
+            
+    <p>If the queue is empty a <code>RuntimeException</code>
+ is thrown, so make sure to check the queue&#039;s length (e.g. with <code>count()</code>
+)
+before trying to dequeue an item!</p>
+
+    </div>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
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+    </section>
+</section>
+        </div>
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+
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+
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+</body>
+</html>

doc/guides/overview/queuerequesthandler.html

@@ -0,0 +1,397 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="queuerequesthandler">
+            <h1>QueueRequestHandler</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents">
+        <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#properties">Properties</a>
+
+        <ul class="section-level-2">
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#middleware-queue">Middleware Queue</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#http-server-request">HTTP Server Request</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#http-response">HTTP Response</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#methods">Methods</a>
+
+        <ul class="section-level-2">
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#handling-a-server-request">Handling a Server Request</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/overview/queuerequesthandler.html#sending-the-response">Sending the Response</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    </ul>
+</div>
+
+    </div>
+</div>
+
+            
+    <p>The <code>QueueRequestHandler</code>
+ is the core piece of this package. It fetches incoming HTTP requests, passes them through a
+queue of middlewares and finally sends the response back to the client. It also catches any exceptions not handled by
+a middleware and turns them into a proper HTTP error response.</p>
+
+            
+    <p>The <code>QueueRequestHandler</code>
+ implements the
+<a href="https://www.php-fig.org/psr/psr-15/#21-psrhttpserverrequesthandlerinterface">Psr\Http\Server\RequestHandlerInterface</a>
+following PHP-FIG&#039;s recommendation <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP Server Request Handlers</a>.</p>
+
+            
+    <p>For a minimal working example have a look at <a href="guides/usage/usage.html">Usage</a>.</p>
+
+            <div class="section" id="properties">
+            <h2>Properties</h2>
+
+            
+    <p>The <code>QueueRequestHandler</code>
+ has three <strong>read-only</strong>
+ properties. They are initially set at instantiation and can be
+directly accessed from the object via magic methods (e.g. <code>$requestHandler-&gt;queue</code>
+).</p>
+
+            <div class="section" id="middleware-queue">
+            <h3>Middleware Queue</h3>
+
+            
+    <p>The queue of middlewares can be accessed as <code>QueueRequestHandler::queue</code>
+ and offers a handy API to <code>enqueue()</code>
+,
+<code>dequeue()</code>
+ or otherwise manipulate its contents. All middlewares must implement <code>Psr\Http\Server\MiddlewareInterface</code>
+.
+Have a look at <a href="guides/overview/middlewarequeue.html">MiddlewareQueue</a> for more details.</p>
+
+            
+    <p>When instantiating a <code>QueueRequestHandler</code>
+ the queue defaults to being empty. But you can optionally pass an iterable
+set of middlewares to the constructor which are then put into the queue. To demonstrate, the following examples both
+have exactly the same result.</p>
+
+            <blockquote>
+    <p>Examples:</p>
+<pre><code class="language-php">use OCC\PSR15\QueueRequestHandler;
+
+$middlewares = [
+    new MiddlewareOne(),
+    new MiddlewareTwo()
+];
+
+$requestHandler = new QueueRequestHandler($middlewares);</code></pre>
+<pre><code class="language-php">use OCC\PSR15\QueueRequestHandler;
+
+$requestHandler = new QueueRequestHandler();
+
+$requestHandler-&gt;queue-&gt;enqueue(new MiddlewareOne());
+$requestHandler-&gt;queue-&gt;enqueue(new MiddlewareTwo());</code></pre>
+</blockquote>
+
+    </div>
+
+            <div class="section" id="http-server-request">
+            <h3>HTTP Server Request</h3>
+
+            
+    <p>The server request is always available as <code>QueueRequestHandler::request</code>
+. It follows PHP-FIG&#039;s standard recommendation
+<a href="https://www.php-fig.org/psr/psr-7/">PSR-7: HTTP Message Interfaces</a> and implements the
+<a href="https://www.php-fig.org/psr/psr-7/#321-psrhttpmessageserverrequestinterface">Psr\Http\Message\ServerRequestInterface</a>.</p>
+
+            
+    <p>When instantiating a <code>QueueRequestHandler</code>
+ the <code>$request</code>
+ property is initially set by fetching the actual server
+request data from superglobals. The property is reset each time the request is passed through a middleware and thus
+always represents the current state of the request.</p>
+
+    </div>
+
+            <div class="section" id="http-response">
+            <h3>HTTP Response</h3>
+
+            
+    <p>The response can be read as <code>QueueRequestHandler::response</code>
+. It also follows PHP-FIG&#039;s standard recommendation
+<a href="https://www.php-fig.org/psr/psr-7/">PSR-7: HTTP Message Interfaces</a> and implements the
+<a href="https://www.php-fig.org/psr/psr-7/#33-psrhttpmessageresponseinterface">Psr\Http\Message\ResponseInterface</a>.</p>
+
+            
+    <p>When instantiating a <code>QueueRequestHandler</code>
+ the <code>$response</code>
+ property is initially set as a blank HTTP response with
+status code <code>200</code>
+. The property is reset each time the response is passed through a middleware and thus
+always represents the latest state of the response.</p>
+
+            
+    <p>Both, request and response, use the awesome implementations of <a href="https://github.com/guzzle/psr7">Guzzle</a>.</p>
+
+    </div>
+
+    </div>
+
+            <div class="section" id="methods">
+            <h2>Methods</h2>
+
+            
+    <p>The <code>QueueRequestHandler</code>
+ provides two public API methods, <a href="classes/OCC-PSR15-QueueRequestHandler.html#method_handle"><abbr title="\OCC\PSR15\QueueRequestHandler::handle()">QueueRequestHandler::handle()</abbr></a>
+ and
+<a href="classes/OCC-PSR15-QueueRequestHandler.html#method_respond"><abbr title="\OCC\PSR15\QueueRequestHandler::respond()">QueueRequestHandler::respond()</abbr></a>
+. As their names suggest, the former handles the server request
+while the latter sends the response back to the client. Invoking the request handler object directly does the same as
+calling the <code>handle()</code>
+ method.</p>
+
+            <div class="section" id="handling-a-server-request">
+            <h3>Handling a Server Request</h3>
+
+            
+    <p>After adding at least one middleware to the queue, you can start handling a request by simply calling
+<a href="classes/OCC-PSR15-QueueRequestHandler.html#method_handle"><abbr title="\OCC\PSR15\QueueRequestHandler::handle()">QueueRequestHandler::handle()</abbr></a>
+. Optionally, you can pass a request object as argument, but since
+the actual server request was already fetched in the constructor and will be used by default, most of the time you
+don&#039;t need to. All request objects must implement <code>Psr\Http\Message\ServerRequestInterface</code>
+.</p>
+
+            
+    <p>The <code>handle()</code>
+ method returns the final response after passing it through all middlewares. The response object always
+implements <code>Psr\Http\Message\ResponseInterface</code>
+.</p>
+
+            
+    <p>In case of an error the request handler catches any exception and creates a response with the exception code as status
+code (if it&#039;s within the valid range of HTTP status codes, otherwise it&#039;s set to <code>500 (Internal Server Error)</code>
+), and
+the exception message as body.</p>
+
+    </div>
+
+            <div class="section" id="sending-the-response">
+            <h3>Sending the Response</h3>
+
+            
+    <p>Sending the final response to the client is as easy as calling <a href="classes/OCC-PSR15-QueueRequestHandler.html#method_respond"><abbr title="\OCC\PSR15\QueueRequestHandler::respond()">QueueRequestHandler::respond()</abbr></a>
+.
+Optionally, you can provide an exit code as argument (an integer in the range <code>0</code>
+ to <code>254</code>
+). If you do so, script
+execution is stopped after sending out the response and the given exit status is set. The status <code>0</code>
+ means the request
+was handled successfully, every other status is considered an error.</p>
+
+    </div>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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doc/guides/usage/index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+    <link rel="icon" href="images/favicon.ico"/>
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+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
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+                    <span>
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+                                                
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
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+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
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+    </section>
+
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+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
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+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="user-guide">
+            <h1>User Guide</h1>
+
+            
+    <p>The <em>Queue-based HTTP Server Request Handler</em>
+ is a library package, not a stand-alone application. The following
+documentation of requirements and installation procedures describes how to make use of the classes within your own
+application. For a detailed description of the package&#039;s contents have a look at the <a href="guides/overview/index.html">Overview</a> page.</p>
+
+            <div class="toc">
+    <ul class="phpdocumentor-list">
+    <li class="toc-item">
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+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/usage/requirements.html#environment">Environment</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/requirements.html#dependencies">Dependencies</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/installation.html#installation">Installation</a>
+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/usage/installation.html#composer">Composer</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/installation.html#git">Git</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/installation.html#download">Download</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/usage.html#usage">Usage</a>
+
+        <ul class="section-level-1">
+            <li class="toc-item">
+    <a href="guides/usage/usage.html#middlewares">Middlewares</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/usage.html#request-handler">Request Handler</a>
+
+
+</li>
+
+            <li class="toc-item">
+    <a href="guides/usage/usage.html#diving-deeper">Diving Deeper</a>
+
+
+</li>
+
+                    </ul>
+</li>
+
+    </ul>
+</div>
+
+    </div>
+
+                            </div>
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doc/guides/usage/installation.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
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+                
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+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="installation">
+            <h1>Installation</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents">
+        <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/usage/installation.html#composer">Composer</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/installation.html#git">Git</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/installation.html#download">Download</a>
+
+
+</li>
+
+    </ul>
+</div>
+
+    </div>
+</div>
+
+            <div class="section" id="composer">
+            <h2>Composer</h2>
+
+            
+    <p>The intended and recommended way of re-using this package is via <a href="https://getcomposer.org/">Composer</a>. The following
+command will get you the latest version and make it a dependency of your project. It will also request all dependencies
+and register all classes with the autoloader to make them available inside the application.</p>
+
+            <pre><code class="language-shell"># This will install the latest stable version suitable for your project
+composer require &quot;opencultureconsulting/psr15&quot;</code></pre>
+
+            
+    <p>If you want to use a specific version other than the latest available for your environment, you can do so by appending
+the desired version constraint:</p>
+
+            <pre><code class="language-shell"># This will install the latest patch level version of 1.1 (i. e. &gt;=1.1.0 &amp;&amp; &lt;1.2.0)
+composer require &quot;opencultureconsulting/psr15:~1.1&quot;</code></pre>
+
+            
+    <p>All available versions as well as further information about <a href="guides/usage/requirements.html">Requirements</a> and dependencies can be found on
+<a href="https://packagist.org/packages/opencultureconsulting/psr15">Packagist</a>.</p>
+
+    </div>
+
+            <div class="section" id="git">
+            <h2>Git</h2>
+
+            
+    <p>Alternatively, you can fetch the files from <a href="https://github.com/opencultureconsulting/psr-15">GitHub</a> and add them to
+your project manually. The best way is by cloning the repository, because then you can easily update to a newer version
+by just pulling the changes and checking out a different version tag.</p>
+
+            <pre><code class="language-shell"># This will clone the repository into the &quot;psr15&quot; directory
+git clone https://github.com/opencultureconsulting/psr-15.git psr15</code></pre>
+
+            
+    <p>If you want to use a specific version other than the latest development state, you have to specify the desired tag as
+well:</p>
+
+            <pre><code class="language-shell"># This will clone the repository state at version &quot;1.1.0&quot; into the &quot;psr15&quot; directory
+git clone --branch=v1.1.0 https://github.com/opencultureconsulting/psr-15.git psr15</code></pre>
+
+            
+    <p>Be aware that you also need to make the classes available in your application by either adding them to your autoloader
+or by including all files individually in PHP. Also don&#039;t forget to do the same for all <a href="guides/usage/requirements.html">Requirements</a>.</p>
+
+    </div>
+
+            <div class="section" id="download">
+            <h2>Download</h2>
+
+            
+    <p>As a last resort you can also just download the files. You can find all available versions as well as the current
+development state on the <a href="https://github.com/opencultureconsulting/psr-15/releases">GitHub release page</a>.</p>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/guides/usage/requirements.html

@@ -0,0 +1,216 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="requirements">
+            <h1>Requirements</h1>
+
+            <div class="section" id="environment">
+            <h2>Environment</h2>
+
+            
+    <p>This package requires at least <strong>PHP 8.1</strong>
+.</p>
+
+            
+    <p>It is highly recommended to use <a href="https://getcomposer.org/">Composer</a> for dependency management and autoloading,
+although it is technically not strictly required for using any of these classes. But it certainly makes it a lot
+easier!</p>
+
+    </div>
+
+            <div class="section" id="dependencies">
+            <h2>Dependencies</h2>
+
+            
+    <p>This package obviously depends on <a href="https://packagist.org/packages/psr/http-server-handler">psr/http-server-handler</a>
+and <a href="https://packagist.org/packages/psr/http-server-middleware">psr/http-server-middleware</a> which define the standard
+<a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP Server Request Handlers</a> interfaces.</p>
+
+            
+    <p>It uses the <a href="https://www.php-fig.org/psr/psr-7/">PSR-7: HTTP Message</a> implementations for server request and response
+of the great <a href="https://packagist.org/packages/guzzlehttp/psr7">guzzlehttp/psr7</a> library.</p>
+
+            
+    <p>The middleware queue is based on a <a href="https://opencultureconsulting.github.io/php-basics/guides/overview/datastructures.html#strictqueue">StrictQueue</a>
+of the <a href="https://packagist.org/packages/opencultureconsulting/basics">opencultureconsulting/basics</a> package which also
+provides some useful traits.</p>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/guides/usage/usage.html

@@ -0,0 +1,397 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="usage">
+            <h1>Usage</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents">
+        <ul class="phpdocumentor-list">
+    <li class="toc-item">
+    <a href="guides/usage/usage.html#middlewares">Middlewares</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/usage.html#request-handler">Request Handler</a>
+
+
+</li>
+
+    <li class="toc-item">
+    <a href="guides/usage/usage.html#diving-deeper">Diving Deeper</a>
+
+
+</li>
+
+    </ul>
+</div>
+
+    </div>
+</div>
+
+            
+    <p>The following example shows a very basic <em>Queue-based HTTP Server Request Handler</em>
+ using just two simple middlewares
+(called <code>MiddlewareOne</code>
+ and <code>MiddlewareTwo</code>
+).</p>
+
+            <div class="section" id="middlewares">
+            <h2>Middlewares</h2>
+
+            
+    <p>First of all, we need some middlewares to process our server request. Although we could use any middleware implementing
+the <code>Psr/Http/Server/MiddlewareInterface</code>
+ (e.g. from <a href="https://github.com/middlewares">this great collection</a>), we
+will write our own using the <a href="guides/overview/abstractmiddleware.html">AbstractMiddleware</a> provided by this package.</p>
+
+            
+    <p>The abstract middleware already implements a complete middleware, but it will just pass requests through without doing
+anything. In order to have it do something, we need to implement our own <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processRequest"><abbr title="\OCC\PSR15\AbstractMiddleware::processRequest()">AbstractMiddleware::processRequest()</abbr></a>
+
+or <a href="classes/OCC-PSR15-AbstractMiddleware.html#method_processResponse"><abbr title="\OCC\PSR15\AbstractMiddleware::processResponse()">AbstractMiddleware::processResponse()</abbr></a>
+ method, or both of them.</p>
+
+            
+    <p>The logic here is the same as with every <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP Server Request Handlers</a>
+middleware: The request gets passed through all middlewares&#039; <code>processRequest()</code>
+ methods in order of their addition to
+the queue, then a response is created and passed through all <code>processResponse()</code>
+ methods, <strong>but in reverse order</strong>
+! So
+the first middleware in the queue gets the request first, but the response last.</p>
+
+            
+    <p>Our first middleware is very simple and just adds an attribute to the server request.</p>
+
+            <pre><code class="language-php">use OCC\PSR15\AbstractMiddleware;
+use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+
+class MiddlewareOne extends AbstractMiddleware
+{
+    /**
+     * Process an incoming server request before delegating to next middleware.
+     *
+     * @param ServerRequest $request The incoming server request
+     *
+     * @return ServerRequest The processed server request
+     */
+    protected function processRequest(ServerRequest $request): ServerRequest
+    {
+        // Let&#039;s just add a new attribute to the request to later check
+        // which middleware was passed last.
+        return $request-&gt;withAttribute(&#039;LastMiddlewarePassed&#039;, &#039;MiddlewareOne&#039;);
+    }
+}</code></pre>
+
+            
+    <p>For a queue to make sense we need at least a second middleware, so let&#039;s create another one. Again, we will add an
+attribute to the request, but with the same name. So, whichever middleware handles the request last overwrites the
+attribute with its value. This way we can later check if our middlewares were passed in the correct order.</p>
+
+            <pre><code class="language-php">use OCC\PSR15\AbstractMiddleware;
+use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+
+class MiddlewareTwo extends AbstractMiddleware
+{
+    /**
+     * Process an incoming server request before delegating to next middleware.
+     *
+     * @param ServerRequest $request The incoming server request
+     *
+     * @return ServerRequest The processed server request
+     */
+    protected function processRequest(ServerRequest $request): ServerRequest
+    {
+        // We add the same request attribute as in MiddlewareOne, effectively
+        // overwriting its value.
+        return $request-&gt;withAttribute(&#039;LastMiddlewarePassed&#039;, &#039;MiddlewareTwo&#039;);
+    }
+}</code></pre>
+
+            
+    <p>Also, we want to set the status code of the response according to the final value of our request attribute. Therefore,
+we need to implement <code>processResponse()</code>
+ as well. We can do that in either one of our middlewares because it&#039;s the only
+response manipulation in our example, so the order of processing doesn&#039;t make a difference (remember: <code>MiddlewareTwo</code>
+
+gets to handle the response before <code>MiddlewareOne</code>
+). Let&#039;s go with <code>MiddlewareTwo</code>
+.</p>
+
+            <pre><code class="language-php">use OCC\PSR15\AbstractMiddleware;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as ServerRequest;
+
+class MiddlewareTwo extends AbstractMiddleware
+{
+    // MiddlewareTwo::processRequest() remains unchanged (see above).
+
+    /**
+     * Process an incoming response before returning it to previous middleware.
+     *
+     * @param Response $response The incoming response
+     *
+     * @return Response The processed response
+     */
+    protected function processResponse(Response $response): Response
+    {
+        // First we need to get the request attribute.
+        $lastMiddlewarePassed = $this-&gt;requestHandler-&gt;request-&gt;getAttribute(&#039;LastMiddlewarePassed&#039;);
+        if ($lastMiddlewarePassed === &#039;MiddlewareTwo&#039;) {
+            // Great, MiddlewareTwo was passed after MiddlewareOne,
+            // let&#039;s return status code 200!
+            return $response-&gt;withStatus(200);
+        } else {
+            // Oh no, something went wrong! We&#039;ll send status code 500.
+            return $response-&gt;withStatus(500);
+        }
+    }
+}</code></pre>
+
+            
+    <p>Well done! We now have two middlewares.</p>
+
+    </div>
+
+            <div class="section" id="request-handler">
+            <h2>Request Handler</h2>
+
+            
+    <p>Let&#039;s use a <a href="guides/overview/queuerequesthandler.html">QueueRequestHandler</a> to pass a server request through both of our middlewares in the
+correct order.</p>
+
+            <pre><code class="language-php">use OCC\PSR15\QueueRequestHandler;
+
+// First of all, we instantiate the request handler.
+// At this point we could already provide an array of middlewares as argument and
+// skip the next step, but then we wouldn&#039;t learn how to use the MiddlewareQueue.
+$requestHandler = new QueueRequestHandler();
+
+// We can access the MiddlewareQueue as a property of the request handler.
+// Let&#039;s add both of our middlewares, MiddlewareOne and MiddlewareTwo. Since
+// this is a FIFO queue, the order is very important!
+$requestHandler-&gt;queue-&gt;enqueue(new MiddlewareOne());
+$requestHandler-&gt;queue-&gt;enqueue(new MiddlewareTwo());
+
+// And we are ready to handle incoming requests!
+// We don&#039;t even need to pass the server request to this method, because
+// the constructor already took care of that!
+$finalResponse = $requestHandler-&gt;handle();
+
+// Now we can pass the final response back to our application.
+// Alternatively, we can also return it directly to the client.
+$requestHandler-&gt;respond();
+
+// If we did everything right, the client should now receive an HTTP response
+// with status code 200 (OK).</code></pre>
+
+            
+    <p>And that&#039;s it!</p>
+
+    </div>
+
+            <div class="section" id="diving-deeper">
+            <h2>Diving Deeper</h2>
+
+            
+    <p>To familiarize yourself with the FIFO principle of the middleware queue, you can try to exchange the two lines adding
+the middlewares to the queue, i.e. add <code>MiddlewareTwo</code>
+ first and <code>MiddlewareOne</code>
+ second. This will result in an HTTP
+response with status code <code>500 (Internal Server Error)</code>
+.</p>
+
+            
+    <p>This is exactly what we intended: Have a look at <code>MiddlewareTwo::processResponse()</code>
+ again! If <code>$lastMiddlewarePassed</code>
+
+is not <code>MiddlewareTwo</code>
+ (which it isn&#039;t when <code>MiddlewareOne</code>
+ is added to the queue after <code>MiddlewareTwo</code>
+), we set the
+response status code to <code>500</code>
+.</p>
+
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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doc/index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    
+    <link rel="icon" href="images/favicon.ico"/>
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+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                    <section>
+    <ul class="phpdocumentor-breadcrumbs">
+        <li><a href>Home</a></li>
+    </ul>
+
+    <h2 class="phpdocumentor-content__title">Queue-based HTTP Server Request Handler</h2>
+
+    <p class="phpdocumentor-summary">An implementation of <a href="https://www.php-fig.org/psr/psr-15/">PSR-15: HTTP
+    Server Request Handlers</a>.</p>
+
+    <p>The PHP Standard Recommendation PSR-15 defines interfaces for server request handlers and proposes a queue-based
+    implementation using different middlewares for processing requests and preparing responses. This package follows
+    those guidelines and provides a <a href="guides/overview/queuerequesthandler.html">HTTP server request handler</a>
+    implementation using a <a href="guides/overview/middlewarequeue.html">middleware queue</a>. It also contains an
+    <a href="guides/overview/abstractmiddleware.html">abstract class for middlewares</a> to ease the process of writing
+    your own middleware, but you can just as well use any middleware that implements the middleware interface specified
+    by PSR-15 (e.g. from the awesome <a href="https://github.com/middlewares">PSR-15 HTTP Middlewares</a> project).</p>
+
+    <p>All components of this package follow the highest coding standards of <a href="https://phpstan.org/">PHPStan</a>
+    and <a href="https://psalm.dev/">Psalm</a>, and comply to <a href="https://www.php-fig.org/psr/psr-12/">PSR-12</a>
+    code style guidelines to make sure they can be combined and easily re-used in other projects.</p>
+
+    <h3 id="toc">Table of Contents</h3>
+
+                <h4 id="toc-documentation">Documentation</h4>
+        <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -documentation">
+                <a href="guides/overview/index.html#overview">Overview</a>
+            </dt>
+                        <dd>
+                            <a href="guides/overview/queuerequesthandler.html#queuerequesthandler">QueueRequestHandler</a><br/>
+                            <a href="guides/overview/middlewarequeue.html#middlewarequeue">MiddlewareQueue</a><br/>
+                            <a href="guides/overview/abstractmiddleware.html#abstractmiddleware">AbstractMiddleware</a><br/>
+                        </dd>
+                                <dt class="phpdocumentor-table-of-contents__entry -documentation">
+                <a href="guides/usage/index.html#user-guide">User Guide</a>
+            </dt>
+                        <dd>
+                            <a href="guides/usage/requirements.html#requirements">Requirements</a><br/>
+                            <a href="guides/usage/installation.html#installation">Installation</a><br/>
+                            <a href="guides/usage/usage.html#usage">Usage</a><br/>
+                        </dd>
+                                <dt class="phpdocumentor-table-of-contents__entry -documentation">
+                <a href="guides/changelog.html#changelog">Changelog</a>
+            </dt>
+                            </dl>
+            <h4 id="toc-packages">Packages</h4>
+        <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -package">
+                <a href="packages/PSR15.html">PSR15</a>
+            </dt>
+                            </dl>
+    </section>
+                            </div>
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+</body>
+</html>

doc/indices/files.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
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+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <section>
+        
+        <h2 class="phpdocumentor-content__title">Files</h2>
+                                            <h3>A</h3>
+            <ul class="phpdocumentor-list">
+                            <li><a href="files/src-abstractmiddleware.html"><abbr title="src/AbstractMiddleware.php">AbstractMiddleware.php</abbr></a></li>
+                        </ul>
+                                                                                                                                                                                                                                                                                                                                                                                                                        <h3>M</h3>
+            <ul class="phpdocumentor-list">
+                            <li><a href="files/src-middlewarequeue.html"><abbr title="src/MiddlewareQueue.php">MiddlewareQueue.php</abbr></a></li>
+                        </ul>
+                                                                                                                                                        <h3>Q</h3>
+            <ul class="phpdocumentor-list">
+                            <li><a href="files/src-queuerequesthandler.html"><abbr title="src/QueueRequestHandler.php">QueueRequestHandler.php</abbr></a></li>
+                        </ul>
+                                                                                                                                                                                                                                                                                                                        </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="indices/files.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/js/search.js

@@ -0,0 +1,173 @@
+// Search module for phpDocumentor
+//
+// This module is a wrapper around fuse.js that will use a given index and attach itself to a
+// search form and to a search results pane identified by the following data attributes:
+//
+// 1. data-search-form
+// 2. data-search-results
+//
+// The data-search-form is expected to have a single input element of type 'search' that will trigger searching for
+// a series of results, were the data-search-results pane is expected to have a direct UL child that will be populated
+// with rendered results.
+//
+// The search has various stages, upon loading this stage the data-search-form receives the CSS class
+// 'phpdocumentor-search--enabled'; this indicates that JS is allowed and indices are being loaded. It is recommended
+// to hide the form by default and show it when it receives this class to achieve progressive enhancement for this
+// feature.
+//
+// After loading this module, it is expected to load a search index asynchronously, for example:
+//
+//         <script defer src="js/searchIndex.js"></script>
+//
+// In this script the generated index should attach itself to the search module using the `appendIndex` function. By
+// doing it like this the page will continue loading, unhindered by the loading of the search.
+//
+// After the page has fully loaded, and all these deferred indexes loaded, the initialization of the search module will
+// be called and the form will receive the class 'phpdocumentor-search--active', indicating search is ready. At this
+// point, the input field will also have it's 'disabled' attribute removed.
+var Search = (function () {
+    var fuse;
+    var index = [];
+    var options = {
+        shouldSort: true,
+        threshold: 0.6,
+        location: 0,
+        distance: 100,
+        maxPatternLength: 32,
+        minMatchCharLength: 1,
+        keys: [
+            "fqsen",
+            "name",
+            "summary",
+            "url"
+        ]
+    };
+
+    // Credit David Walsh (https://davidwalsh.name/javascript-debounce-function)
+    // Returns a function, that, as long as it continues to be invoked, will not
+    // be triggered. The function will be called after it stops being called for
+    // N milliseconds. If `immediate` is passed, trigger the function on the
+    // leading edge, instead of the trailing.
+    function debounce(func, wait, immediate) {
+        var timeout;
+
+        return function executedFunction() {
+            var context = this;
+            var args = arguments;
+
+            var later = function () {
+                timeout = null;
+                if (!immediate) func.apply(context, args);
+            };
+
+            var callNow = immediate && !timeout;
+            clearTimeout(timeout);
+            timeout = setTimeout(later, wait);
+            if (callNow) func.apply(context, args);
+        };
+    }
+
+    function close() {
+        // Start scroll prevention: https://css-tricks.com/prevent-page-scrolling-when-a-modal-is-open/
+        const scrollY = document.body.style.top;
+        document.body.style.position = '';
+        document.body.style.top = '';
+        window.scrollTo(0, parseInt(scrollY || '0') * -1);
+        // End scroll prevention
+
+        var form = document.querySelector('[data-search-form]');
+        var searchResults = document.querySelector('[data-search-results]');
+
+        form.classList.toggle('phpdocumentor-search--has-results', false);
+        searchResults.classList.add('phpdocumentor-search-results--hidden');
+        var searchField = document.querySelector('[data-search-form] input[type="search"]');
+        searchField.blur();
+    }
+
+    function search(event) {
+        // Start scroll prevention: https://css-tricks.com/prevent-page-scrolling-when-a-modal-is-open/
+        document.body.style.position = 'fixed';
+        document.body.style.top = `-${window.scrollY}px`;
+        // End scroll prevention
+
+        // prevent enter's from autosubmitting
+        event.stopPropagation();
+
+        var form = document.querySelector('[data-search-form]');
+        var searchResults = document.querySelector('[data-search-results]');
+        var searchResultEntries = document.querySelector('[data-search-results] .phpdocumentor-search-results__entries');
+
+        searchResultEntries.innerHTML = '';
+
+        if (!event.target.value) {
+            close();
+            return;
+        }
+
+        form.classList.toggle('phpdocumentor-search--has-results', true);
+        searchResults.classList.remove('phpdocumentor-search-results--hidden');
+        var results = fuse.search(event.target.value, {limit: 25});
+
+        results.forEach(function (result) {
+            var entry = document.createElement("li");
+            entry.classList.add("phpdocumentor-search-results__entry");
+            entry.innerHTML += '<h3><a href="' + document.baseURI + result.url + '">' + result.name + "</a></h3>\n";
+            entry.innerHTML += '<small>' + result.fqsen + "</small>\n";
+            entry.innerHTML += '<div class="phpdocumentor-summary">' + result.summary + '</div>';
+            searchResultEntries.appendChild(entry)
+        });
+    }
+
+    function appendIndex(added) {
+        index = index.concat(added);
+
+        // re-initialize search engine when appending an index after initialisation
+        if (typeof fuse !== 'undefined') {
+            fuse = new Fuse(index, options);
+        }
+    }
+
+    function init() {
+        fuse = new Fuse(index, options);
+
+        var form = document.querySelector('[data-search-form]');
+        var searchField = document.querySelector('[data-search-form] input[type="search"]');
+
+        var closeButton = document.querySelector('.phpdocumentor-search-results__close');
+        closeButton.addEventListener('click', function() { close() }.bind(this));
+
+        var searchResults = document.querySelector('[data-search-results]');
+        searchResults.addEventListener('click', function() { close() }.bind(this));
+
+        form.classList.add('phpdocumentor-search--active');
+
+        searchField.setAttribute('placeholder', 'Search (Press "/" to focus)');
+        searchField.removeAttribute('disabled');
+        searchField.addEventListener('keyup', debounce(search, 300));
+
+        window.addEventListener('keyup', function (event) {
+            if (event.key === '/') {
+                searchField.focus();
+            }
+            if (event.code === 'Escape') {
+                close();
+            }
+        }.bind(this));
+    }
+
+    return {
+        appendIndex,
+        init
+    }
+})();
+
+window.addEventListener('DOMContentLoaded', function () {
+    var form = document.querySelector('[data-search-form]');
+
+    // When JS is supported; show search box. Must be before including the search for it to take effect immediately
+    form.classList.add('phpdocumentor-search--enabled');
+});
+
+window.addEventListener('load', function () {
+    Search.init();
+});

doc/js/searchIndex.js

@@ -0,0 +1,79 @@
+Search.appendIndex(
+    [
+                {
+            "fqsen": "\\OCC\\PSR15\\AbstractMiddleware",
+            "name": "AbstractMiddleware",
+            "summary": "Abstract\u0020class\u0020implementing\u0020\\Psr\\Http\\Server\\MiddlewareInterface.",
+            "url": "classes/OCC-PSR15-AbstractMiddleware.html"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\AbstractMiddleware\u003A\u003Aprocess\u0028\u0029",
+            "name": "process",
+            "summary": "Process\u0020an\u0020incoming\u0020server\u0020request\u0020and\u0020produce\u0020a\u0020response.",
+            "url": "classes/OCC-PSR15-AbstractMiddleware.html#method_process"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\AbstractMiddleware\u003A\u003AprocessRequest\u0028\u0029",
+            "name": "processRequest",
+            "summary": "Process\u0020an\u0020incoming\u0020server\u0020request\u0020before\u0020delegating\u0020to\u0020next\u0020middleware.",
+            "url": "classes/OCC-PSR15-AbstractMiddleware.html#method_processRequest"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\AbstractMiddleware\u003A\u003AprocessResponse\u0028\u0029",
+            "name": "processResponse",
+            "summary": "Process\u0020an\u0020incoming\u0020response\u0020before\u0020returning\u0020it\u0020to\u0020previous\u0020middleware.",
+            "url": "classes/OCC-PSR15-AbstractMiddleware.html#method_processResponse"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\AbstractMiddleware\u003A\u003A__invoke\u0028\u0029",
+            "name": "__invoke",
+            "summary": "Allow\u0020the\u0020middleware\u0020to\u0020be\u0020invoked\u0020directly.",
+            "url": "classes/OCC-PSR15-AbstractMiddleware.html#method___invoke"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\MiddlewareQueue",
+            "name": "MiddlewareQueue",
+            "summary": "Queue\u0020of\u0020PSR\u002D15\u0020Middlewares\u0020to\u0020process\u0020HTTP\u0020Server\u0020Requests.",
+            "url": "classes/OCC-PSR15-MiddlewareQueue.html"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\MiddlewareQueue\u003A\u003A__construct\u0028\u0029",
+            "name": "__construct",
+            "summary": "Create\u0020a\u0020queue\u0020of\u0020PSR\u002D15\u0020compatible\u0020middlewares.",
+            "url": "classes/OCC-PSR15-MiddlewareQueue.html#method___construct"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\QueueRequestHandler",
+            "name": "QueueRequestHandler",
+            "summary": "A\u0020queue\u002Dbased\u0020PSR\u002D15\u0020HTTP\u0020Server\u0020Request\u0020Handler.",
+            "url": "classes/OCC-PSR15-QueueRequestHandler.html"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\QueueRequestHandler\u003A\u003Ahandle\u0028\u0029",
+            "name": "handle",
+            "summary": "Handles\u0020a\u0020request\u0020by\u0020invoking\u0020a\u0020queue\u0020of\u0020middlewares.",
+            "url": "classes/OCC-PSR15-QueueRequestHandler.html#method_handle"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\QueueRequestHandler\u003A\u003Arespond\u0028\u0029",
+            "name": "respond",
+            "summary": "Return\u0020the\u0020current\u0020response\u0020to\u0020the\u0020client.",
+            "url": "classes/OCC-PSR15-QueueRequestHandler.html#method_respond"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\QueueRequestHandler\u003A\u003A__construct\u0028\u0029",
+            "name": "__construct",
+            "summary": "Create\u0020a\u0020queue\u002Dbased\u0020PSR\u002D15\u0020HTTP\u0020Server\u0020Request\u0020Handler.",
+            "url": "classes/OCC-PSR15-QueueRequestHandler.html#method___construct"
+        },                {
+            "fqsen": "\\OCC\\PSR15\\QueueRequestHandler\u003A\u003A__invoke\u0028\u0029",
+            "name": "__invoke",
+            "summary": "Allow\u0020the\u0020request\u0020handler\u0020to\u0020be\u0020invoked\u0020directly.",
+            "url": "classes/OCC-PSR15-QueueRequestHandler.html#method___invoke"
+        },                {
+            "fqsen": "\\",
+            "name": "\\",
+            "summary": "",
+            "url": "namespaces/default.html"
+        },                {
+            "fqsen": "\\OCC\\PSR15",
+            "name": "PSR15",
+            "summary": "",
+            "url": "namespaces/occ-psr15.html"
+        },                {
+            "fqsen": "\\OCC",
+            "name": "OCC",
+            "summary": "",
+            "url": "namespaces/occ.html"
+        }            ]
+);

doc/js/template.js

@@ -0,0 +1,17 @@
+(function(){
+    window.addEventListener('load', () => {
+        const el = document.querySelector('.phpdocumentor-on-this-page__content')
+        if (!el) {
+            return;
+        }
+
+        const observer = new IntersectionObserver(
+            ([e]) => {
+                e.target.classList.toggle("-stuck", e.intersectionRatio < 1);
+            },
+            {threshold: [1]}
+        );
+
+        observer.observe(el);
+    })
+})();

doc/namespaces/default.html

@@ -0,0 +1,324 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
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+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -namespace">
+        <h2 class="phpdocumentor-content__title">API Documentation</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="namespaces/default.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+<h4 id="namespaces">
+    Namespaces
+    <a href="namespaces/default.html#namespaces" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -namespace"><a href="namespaces/occ.html"><abbr title="\OCC">OCC</abbr></a></dt>
+    </dl>
+
+
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
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+
+                    xhr.open('GET', src, true);
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+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
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+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
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+                trigger.addEventListener("click", function (event) {
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+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
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+                    modal.classList.add("phpdocumentor-modal__open");
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+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
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+                });
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+        })();
+    </script>
+
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+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                                                                                </ul>
+            </li>
+
+            
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="namespaces/default.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
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+
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+        cssVars({});
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+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
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+</body>
+</html>

doc/namespaces/occ-psr15.html

@@ -0,0 +1,325 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
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+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="-active">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -namespace">
+        <h2 class="phpdocumentor-content__title">PSR15</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="namespaces/occ-psr15.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+    <h4 id="toc-classes">
+        Classes
+        <a href="namespaces/occ-psr15.html#toc-classes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-AbstractMiddleware.html"><abbr title="\OCC\PSR15\AbstractMiddleware">AbstractMiddleware</abbr></a></dt><dd>Abstract class implementing \Psr\Http\Server\MiddlewareInterface.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-MiddlewareQueue.html"><abbr title="\OCC\PSR15\MiddlewareQueue">MiddlewareQueue</abbr></a></dt><dd>Queue of PSR-15 Middlewares to process HTTP Server Requests.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-QueueRequestHandler.html"><abbr title="\OCC\PSR15\QueueRequestHandler">QueueRequestHandler</abbr></a></dt><dd>A queue-based PSR-15 HTTP Server Request Handler.</dd>    </dl>
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
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+
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+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
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+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
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+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
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+                    modal.classList.add("phpdocumentor-modal__open");
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+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
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+        })();
+    </script>
+
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+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                    <li><a href="namespaces/occ-psr15.html#toc-classes">Classes</a></li>
+                                                                                                                    </ul>
+            </li>
+
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+                    </ul>
+    </section>
+
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+                            </div>
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+</section>
+        </div>
+        <a href="namespaces/occ-psr15.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
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+
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+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/namespaces/occ.html

@@ -0,0 +1,324 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="-active">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -namespace">
+        <h2 class="phpdocumentor-content__title">OCC</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="namespaces/occ.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+<h4 id="namespaces">
+    Namespaces
+    <a href="namespaces/occ.html#namespaces" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -namespace"><a href="namespaces/occ-psr15.html"><abbr title="\OCC\PSR15">PSR15</abbr></a></dt>
+    </dl>
+
+
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                                                                                </ul>
+            </li>
+
+            
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="namespaces/occ.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/packages/Basics.html

@@ -0,0 +1,302 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="-active">Basics</a>
+</h4>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -package">
+        <h2 class="phpdocumentor-content__title">Basics</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="packages/Basics.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
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+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                                                                                </ul>
+            </li>
+
+            
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="packages/Basics.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
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+</body>
+</html>

doc/packages/PSR-15.html

@@ -0,0 +1,309 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR.html" class="">PSR</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="packages/PSR-15.html" class="-active">15</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="packages/PSR.html">PSR</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -package">
+        <h2 class="phpdocumentor-content__title">15</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="packages/PSR-15.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+
+
+        
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+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
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+</div>
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+                    const language = 'php';
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+                    code.className = 'language-' + language;
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+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                                                                                </ul>
+            </li>
+
+            
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="packages/PSR-15.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/packages/PSR.html

@@ -0,0 +1,316 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR.html" class="-active">PSR</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="packages/PSR-15.html" class="">15</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -package">
+        <h2 class="phpdocumentor-content__title">PSR</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="packages/PSR.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+<h4 id="packages">
+    Packages
+    <a href="packages/PSR.html#packages" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -package"><a href="packages/PSR-15.html"><abbr title="\PSR\15">15</abbr></a></dt>
+    </dl>
+
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+        
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+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
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+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
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+</div>
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+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
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+                    code.className = 'language-' + language;
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+                            Prism.highlightElement(code);
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+                    'browsers block XHR requests when a page is opened this way'
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+
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+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
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+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                                                                                </ul>
+            </li>
+
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+    </section>
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+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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+            <ul class="phpdocumentor-search-results__entries"></ul>
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+    </section>
+</section>
+        </div>
+        <a href="packages/PSR.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
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+</body>
+</html>

doc/packages/PSR15.html

@@ -0,0 +1,324 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
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+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
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+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
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+    </label>
+    <section data-search-form class="phpdocumentor-search">
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+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
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+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
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+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
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+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
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+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="-active">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -package">
+        <h2 class="phpdocumentor-content__title">PSR15</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="packages/PSR15.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+    <h4 id="toc-classes">
+        Classes
+        <a href="packages/PSR15.html#toc-classes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-AbstractMiddleware.html"><abbr title="\OCC\PSR15\AbstractMiddleware">AbstractMiddleware</abbr></a></dt><dd>Abstract class implementing \Psr\Http\Server\MiddlewareInterface.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-MiddlewareQueue.html"><abbr title="\OCC\PSR15\MiddlewareQueue">MiddlewareQueue</abbr></a></dt><dd>Queue of PSR-15 Middlewares to process HTTP Server Requests.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-QueueRequestHandler.html"><abbr title="\OCC\PSR15\QueueRequestHandler">QueueRequestHandler</abbr></a></dt><dd>A queue-based PSR-15 HTTP Server Request Handler.</dd>    </dl>
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
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+    </div>
+</div>
+
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+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
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+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
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+                        if (xhr.readyState !== 4) {
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+
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+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
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+
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+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
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+
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+                    };
+
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+
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+            const openedAsLocalFile = window.location.protocol === 'file:';
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+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
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+
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+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
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+
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+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
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+                    modal.classList.add("phpdocumentor-modal__open");
+
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+                    const exits = modal.querySelectorAll("[data-exit-button]");
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+
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+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                        <li><a href="packages/PSR15.html#toc-classes">Classes</a></li>
+                                                                                                                    </ul>
+            </li>
+
+            
+                    </ul>
+    </section>
+
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+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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+            <ul class="phpdocumentor-search-results__entries"></ul>
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+</section>
+        </div>
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+</body>
+</html>

doc/packages/default.html

@@ -0,0 +1,324 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
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+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
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+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
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+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
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+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
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+    </section>
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+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -package">
+        <h2 class="phpdocumentor-content__title">API Documentation</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="packages/default.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+<h4 id="packages">
+    Packages
+    <a href="packages/default.html#packages" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -package"><a href="packages/PSR15.html"><abbr title="\PSR15">PSR15</abbr></a></dt>
+    </dl>
+
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+
+
+
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+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
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+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
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+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
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+                    code.className = 'language-' + language;
+                    pre.textContent = '';
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+                        if (xhr.readyState !== 4) {
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+
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+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
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+
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+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
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+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
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+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
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+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
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+                    modal.classList.add("phpdocumentor-modal__open");
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+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                                                                                </ul>
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+
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+    </section>
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+                            </div>
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+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
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+            <ul class="phpdocumentor-search-results__entries"></ul>
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+</section>
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+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/packages/opencultureconsultingpsr15.html

@@ -0,0 +1,310 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PSR-15 Queue</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
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+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
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+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
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+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
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+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="">Basics</a>
+</h4>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/opencultureconsultingpsr15.html" class="-active">opencultureconsultingpsr15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+    </ul>
+
+    <article class="phpdocumentor-element -package">
+        <h2 class="phpdocumentor-content__title">opencultureconsultingpsr15</h2>
+
+        
+<h3 id="toc">
+    Table of Contents
+    <a href="packages/opencultureconsultingpsr15.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+    <h4 id="toc-classes">
+        Classes
+        <a href="packages/opencultureconsultingpsr15.html#toc-classes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-AbstractMiddleware.html"><abbr title="\OCC\PSR15\AbstractMiddleware">AbstractMiddleware</abbr></a></dt><dd>Abstract class implementing Psr\Http\Server\MiddlewareInterface.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-MiddlewareQueue.html"><abbr title="\OCC\PSR15\MiddlewareQueue">MiddlewareQueue</abbr></a></dt><dd>Queue of PSR-15 Middlewares to process HTTP Server Requests.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-PSR15-QueueRequestHandler.html"><abbr title="\OCC\PSR15\QueueRequestHandler">QueueRequestHandler</abbr></a></dt><dd>A queue-based PSR-15 HTTP Server Request Handler.</dd>    </dl>
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
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+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
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+                });
+            }
+
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+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
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+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                            
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                        <li><a href="packages/opencultureconsultingpsr15.html#toc-classes">Classes</a></li>
+                                                                                                                    </ul>
+            </li>
+
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+                    </ul>
+    </section>
+
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+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="packages/opencultureconsultingpsr15.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
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+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/reports/deprecated.html

@@ -0,0 +1,192 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>    PSR-15 Queue &raquo; Deprecated elements
+</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <section>
+        <ul class="phpdocumentor-breadcrumbs">
+            <li><a href="">Home</a></li>
+        </ul>
+
+        <div class="phpdocumentor-row">
+            <h2 class="phpdocumentor-content__title">Deprecated</h2>
+
+            
+                            <div class="phpdocumentor-admonition phpdocumentor-admonition--success">
+                    No deprecated elements have been found in this project.
+                </div>
+                    </div>
+    </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="reports/deprecated.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/reports/errors.html

@@ -0,0 +1,191 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>    PSR-15 Queue &raquo; Compilation errors
+</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <section>
+        <ul class="phpdocumentor-breadcrumbs">
+            <li><a href="">Home</a></li>
+        </ul>
+
+        <div class="phpdocumentor-row">
+            <h2 class="phpdocumentor-content__title">Errors</h2>
+
+            
+                            <div class="phpdocumentor-admonition phpdocumentor-admonition--success">No errors have been found in this project.</div>
+            
+                    </div>
+    </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="reports/errors.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

doc/reports/markers.html

@@ -0,0 +1,192 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>    PSR-15 Queue &raquo; Markers
+</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PSR-15 Queue</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/queuerequesthandler.html#queuerequesthandler" class="">QueueRequestHandler</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/middlewarequeue.html#middlewarequeue" class="">MiddlewareQueue</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/abstractmiddleware.html#abstractmiddleware" class="">AbstractMiddleware</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/usage.html#usage" class="">Usage</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-psr15.html" class="">PSR15</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/PSR15.html" class="">PSR15</a>
+</h4>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <section>
+        <ul class="phpdocumentor-breadcrumbs">
+            <li><a href="">Home</a></li>
+        </ul>
+
+        <div class="phpdocumentor-row">
+            <h2 class="phpdocumentor-content__title">Markers</h2>
+
+                            <div class="phpdocumentor-admonition phpdocumentor-admonition--success">
+                    No markers have been found in this project.
+                </div>
+            
+                    </div>
+    </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="reports/markers.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>

psalm.xml.dist

@@ -6,7 +6,7 @@
     errorLevel="1"
     resolveFromConfigFile="true"
     findUnusedBaselineEntry="true"
-    findUnusedCode="true"
+    findUnusedCode="false"
     findUnusedVariablesAndParams="true"
 >
     <issueHandlers>

src/AbstractMiddleware.php

@@ -99,8 +99,6 @@ abstract class AbstractMiddleware implements MiddlewareInterface
      * @param RequestHandler $handler The request handler to delegate to
      *
      * @return Response The response object
-     *
-     * @api
      */
     final public function __invoke(ServerRequest $request, RequestHandler $handler): Response
     {

src/QueueRequestHandler.php

@@ -120,7 +120,6 @@ class QueueRequestHandler implements RequestHandler
                         $exception->getMessage()
                     )
                 );
-                $this->respond(1);
             }
         }
         return $this->response;
@@ -129,7 +128,9 @@ class QueueRequestHandler implements RequestHandler
     /**
      * Return the current response to the client.
      *
-     * @param ?int $exitCode Exit code after sending out the response or NULL to continue
+     * @param ?int $exitCode Exit status after sending out the response or NULL to continue
+     *
+     *                       Must be in the range 0 to 254. The status 0 is used to terminate the program successfully.
      *
      * @return void
      *
@@ -166,6 +167,14 @@ class QueueRequestHandler implements RequestHandler
         }
         echo $this->response->getBody();
         if (!is_null($exitCode)) {
+            $options = [
+                'options' => [
+                    'default' => 1,
+                    'min_range' => 0,
+                    'max_range' => 254
+                ]
+            ];
+            $exitCode = filter_var($exitCode, FILTER_VALIDATE_INT, $options);
             exit($exitCode);
         }
     }
@@ -177,7 +186,7 @@ class QueueRequestHandler implements RequestHandler
      *
      * @internal
      */
-    protected function magicGetQueue(): MiddlewareQueue
+    protected function _magicGetQueue(): MiddlewareQueue
     {
         return $this->queue;
     }
@@ -226,8 +235,6 @@ class QueueRequestHandler implements RequestHandler
      * @param ?ServerRequest $request The PSR-7 server request to handle
      *
      * @return Response A PSR-7 compatible HTTP response
-     *
-     * @api
      */
     public function __invoke(?ServerRequest $request = null): Response
     {