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@ -1,4 +1,5 @@
Copyright (c) 2011 Jianfeng Li
Copyright (c) 2013 Daniel Neis Araujo <danielneis@gmail.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
@ -12,3 +13,678 @@ 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/>.
GNU GENERAL PUBLIC LICENSE
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<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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OAI-PMH (Package Metadata Harvesting) 2.0 Data Provider
Overview
This project is derived from the original work of Jianfeng Li
from "The Plant Accelerator" for the "University of Adelaide".
In the original docs (you can see them on git log),
Jianfeng Li he was inspired by PHP OAI Data Provider developed
by Heinrich Stamerjohanns at University of Oldenburg.
His implementation is at http://physnet.uni-oldenburg.de/oai/.
Almost all the code was rewritten in my attempt to understand
both the OAI-PMH protocol and the original code itself.
The code changed so much that i removed the original documentation.
There is some unit tests that were written based on the official
protocol documentation at http://www.openarchives.org/OAI/openarchivesprotocol.html#ErrorConditions
and also on the Open Archives Initiative - Repository Explorer at http://re.cs.uct.ac.za/
This version of the server relies on callbacks to get the needed data
to generate the XML responses. The file oai2.php is a sample server
instantiation to allow unit tests (OAI2ServerTest.php) to be run by
PHP Unit. It has "hard-coded" data to pass the tests and validates
that the server correctly reads correctly-formatted data.
It is your responsibility to provide callbacks that provides
correctly formatted data in all cases.
Tokens are managed using files.
XML Responses are created using the DOMDocument PHP interfaces.
Package Structure:
code-coverage-report : Generated by PHPUnit for the last commit
COPYRIGHT.txt : GNU General Public License
index.html : A simpl web interface to oai2.php sample server
oai2exception.php : A class with all error codes for OAI-PMH 2.0 Protocol
oai2.php : A sample server instatiation (unit tests rely on this file)
oai2server.php : The request handling (with input validations) and part of response generation
OAI2ServerTest.php : The unit tests
oai2xml.php : A class responsible to generate the XML Responses
README.tx : This file

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>OAI-PMH 2.0 Data Provider (written in PHP)</title>
</head>
<body>
<h1>OAI-PMH 2.0 Data Provider (written in PHP)</h1>
<p>This is an implementation of an <a href="http://www.openarchives.org/OAI/openarchivesprotocol.html" target="_blank">OAI-PMH 2.0 Data Provider</a>, written in <a href="http://www.php.net" title="PHP's website" target="_blank">PHP</a>
<p>For more information, take a look at <a href="README.txt">README.txt</a> file</p>
<h2>Simple interface to sample server</h2>
<ul>
<li><a href="oai2.php?verb=Identify">Identify</a></li>
<li><a href="oai2.php?verb=ListMetadataFormats">ListMetadataFormats</a></li>
<li><a href="oai2.php?verb=ListSets">ListSets</a></li>
<li><a href="oai2.php?verb=ListIdentifiers&amp;metadataPrefix=oai_dc">ListIdentifiers(metadataPrefix=oai_dc)</a></li>
<li><a href="oai2.php?verb=ListRecords&amp;metadataPrefix=oai_dc">ListRecords(metadataPrefix=oai_dc)</a></li>
<li><a href="oai2.php?verb=GetRecord&amp;metadataPrefix=oai_dc&amp;identifier=a.b.c">GetRecord(metadataPrefix=oai_dc, identifier=a.b.c)</a></li>
</ul>
</body>
</html>

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<?php
/*! \mainpage notitle
*
* \section intro_sec Introduction
*
* This is an implementation for an OAI-PMH 2.0 Data Provider (sometimes, repository is used exchangeablly) written in PHP.
*
* This implementation completely complies to OAI-PMH 2.0, including
* the support of on-the-fly output compression which may significantly
* reduce the amount of data being transfered.
*
* This package has been inspired by PHP OAI Data Provider developed by Heinrich Stamerjohanns at University of Oldenburg.
* Some of the functions and algorithms used in this code were transplanted from his implementation at http://physnet.uni-oldenburg.de/oai/.
*
* Database support is supported through PDO (PHP Data Objects included in
* the PHP distribution), so almost any popular SQL-database can be
* used without any change in the code. Only thing need to do is to configure
* database connection and define a suitable data structure.
*
* The repository can be quite easily configured by just editing
* oaidp-config.php, most possible values and options are explained.
*
* \section req_sec Requirements
* - A running web server + PHP version 5.0 or above.
* - A databse can be connected by PDO.
*
* \section install_sec Installation
*
*- Copy the the files in source package to a location under your
* document root of your web server. The directory structure should be
* preserved.
*- Change to that directory (e.g. cd /var/www/html/oai).
*- Allow your webserver to write to the token directory.
* The default token directory is /tmp which does not need any attention.
*- Edit oaidp-config.php. Almost all possible options are
* explained. It is assumed that basic elements of a record are stored in
* one simple table. You can find sql examples of table definition in doc folder.
* If your data is organized differently, you have to adjust the <i>Query</i> functions
* to reflect it and even develop your own code.
*- Check your oai site through a web browser. e.g. : \code http://localhost/oai/ \endcode
*- SELinux needs special treatments for database connection and other permission.
*
* \section struct_sec Structure
The system includes files for individual functionality and utility classes and functions to get it work.
- Controller
- oai2.php
- Individual functionalities:
- identify.php: identifies the data provider. Responses to <B>Identify</B>.
- listmetadataformats.php: lists supported metadata formats, e.g. dc or rif-cs. Responses to <B>ListMetadataFormats</B>.
- listsets.php: lists supported sets, e.g. Activity, Collection or Party. Responses to <B>ListSets</B>.
- listrecords.php: lists a group of records without details. Responses to <B>ListRecords</B>. It also serves to <B>ListIdentifiers</B> which only returns identifiers.
- getrecord.php: gets an individual record. Responses to <B>GetRecord</B>.
- Utility classes
- xml_creater.php which includes classess ANDS_XML, ANDS_Error_XML, ANDS_Response_XML
- Utility functions
- oaidp-util.php
- Support to different metadataformats in your own systems. Two examples provided with the package are: record_dc.php and record_rif.php. They are helpers and need information from the real records. They need to be devloped for your particular system.
- Configurations
- oaidp-config.php
*
* \author Jianfeng Li
* \version 1.1
* \date 2010-2011
*/
/**
* \file
* \brief
* Default starting point of OAI Data Provider for a human to check.
*
* OAI Data Provider is not designed for human to retrieve data but it is possible to use this page to test and check the functionality of current implementation.
* This page provides a summary of the OAI-PMH and the implementation.
*
*/
$MY_URI = 'http://'.$_SERVER['SERVER_NAME'].$_SERVER['SCRIPT_NAME'];
$pos = strrpos($MY_URI, '/');
$MY_URI = substr($MY_URI, 0, $pos). '/oai2.php';
?>
<html>
<head>
<title>php-oai2 Data Provider</title>
</head>
<body>
<h3>php-oai2 Data Provider</h3>
<p>This is an implementation of an <a href="http://www.openarchives.org/OAI/openarchivesprotocol.html" target="_blank">OAI-PMH 2.0 Data Provider</a>, written in <a href="http://www.php.net" title="PHP's website" target="_blank">PHP</a> and has been tested with version 5.3.</p>
<p>This implementation completely complies to <a href="http://www.openarchives.org/OAI/openarchivesprotocol.html" target="_blank">OAI-PMH 2.0</a>, including the support of on-the-fly output compression which may significantly
reduce the amount of data being transfered.</p>
<p> This package has been inspired by <a href='http://physnet.uni-oldenburg.de/oai/' target="_blank">PHP OAI Data Provider</a> developed by Heinrich Stamerjohanns at University of Oldenburg.
Some of the functions and algorithms used in this code were transplanted from his implementation.<p>
<p>Database is supported through <a href="http://www.php.net/manual/en/book.pdo.php" target="_blank"><dfn><abbr title="PHP Data Objects">PDO</abbr></dfn></a>, so almost any popular SQL-database which has PDO driver can be used without any change in the code.</p>
<p> It uses <dfn>DOM extension</dfn>,an extension included in every PHP installation since version 5, for generating XML files. With PHP 5 or above no extra extension is needed.</p>
<p>The repository can be quite easily configured by just editing oai2/oaidp-config.php, most possible values and options are explained.
For requirements and instructions to install and configure, please reference <a href="doc/index.html">the documentation</a>.</p>
<p>Once you have setup your Data Provider, you can the easiliy check the generated answers (it will be XML) of your Data Provider
by clicking on the <a href="#tests">test links below</a>. </p>
<p>For simple visual tests set <em>$SHOW_QUERY_ERROR</em> to <em>TRUE</em> and <em>$CONTENT_TYPE</em> to <em>text/plain</em>, so you can easily read the generated XML responses in your browser. </p>
<p><strong>Remember</strong>, <em>GetRecord</em> needs <b><i>identifier</i></b> to work.
So please change it use your own or you should see a response with error message.</p>
<p>
<dl>
<dt>Example Tables
<dd><a href="doc/oai_records_mysql.sql">OAI Records (mysql)</a></dd>
<dd><a href="doc/oai_records_pgsql.sql">OAI Records (pgsql)</a></dd>
</dt>
<dt>Query and check your Data-Provider</dt>
<dd><a href="<?php echo $MY_URI; ?>?verb=Identify">Identify</a></dd>
<dd><a href="<?php echo $MY_URI; ?>?verb=ListMetadataFormats">ListMetadataFormats</a></dd>
<dd><a href="<?php echo $MY_URI; ?>?verb=ListSets">ListSets</a></dd>
<dd><a href="<?php echo $MY_URI; ?>?verb=ListIdentifiers&amp;metadataPrefix=rif">ListIdentifiers</a></dd>
<dd><a href="<?php echo $MY_URI; ?>?verb=ListRecords&amp;metadataPrefix=rif">ListRecords</a></dd>
<dd><a href="<?php echo $MY_URI; ?>?verb=GetRecord&amp;metadataPrefix=rif&amp;identifier=8b1fcb90-872d-4d7d-a745-fbc37d4561b8">GetRecord</a></dd>
</dt>
</dl>
</p>
<p>
For other tests on your own provider or other providers, please use the <a href="http://re.cs.uct.ac.za/" title="OAI Repository Explorer" target="_blank">Repository Explorer</a>.
</p>
<p>
Jianfeng Li<br>
The Plant Accelerator<br>
University of Adelaide
</p>
</body>
</html>