Add "expirationDate" attribute to resumption token

dlf/plugins/oai/class.tx_dlf_oai.php

@@ -524,7 +524,7 @@ class tx_dlf_oai extends tx_dlf_plugin {
 
 		header('Date: '.date('r', $GLOBALS['EXEC_TIME']));
 
-		header('Expires: '.date('r', $GLOBALS['EXEC_TIME']));
+		header('Expires: '.date('r', $GLOBALS['EXEC_TIME'] + $this->conf['expired']));
 
 		echo $content;
 
@@ -723,6 +723,8 @@ class tx_dlf_oai extends tx_dlf_plugin {
 
 		$resumptionToken->setAttribute('completeListSize', $resultSet->count);
 
+		$resumptionToken->setAttribute('expirationDate', gmdate('Y-m-d\TH:i:s\Z', $GLOBALS['EXEC_TIME'] + $this->conf['expired']));
+
 		$resume->appendChild($resumptionToken);
 
 		return $resume;
@@ -1215,6 +1217,8 @@ class tx_dlf_oai extends tx_dlf_plugin {
 
 					$resumptionToken->setAttribute('completeListSize', $resultSet->count);
 
+					$resumptionToken->setAttribute('expirationDate', gmdate('Y-m-d\TH:i:s\Z', $GLOBALS['EXEC_TIME'] + $this->conf['expired']));
+
 					$ListIdentifiers->appendChild($resumptionToken);
 
 				} else {
@@ -1614,6 +1618,8 @@ class tx_dlf_oai extends tx_dlf_plugin {
 
 					$resumptionToken->setAttribute('completeListSize', $resultSet->count);
 
+					$resumptionToken->setAttribute('expirationDate', gmdate('Y-m-d\TH:i:s\Z', $GLOBALS['EXEC_TIME'] + $this->conf['expired']));
+
 					$ListRecords->appendChild($resumptionToken);
 
 				} else {