dirroot."/auth/shibboleth/auth.php"); // Find out whether host supports https $protocol = 'http://'; if (is_https()) { $protocol = 'https://'; } // Front channel logout if ( isset($_GET['return']) && isset($_GET['action']) && $_GET['action'] == 'logout' ){ // Logout out user from application // E.g. destroy application session/cookie etc require_logout(); // Finally, send user to the return URL redirect($_GET['return']); } // Back channel logout elseif (!empty($HTTP_RAW_POST_DATA)) { // Requires PHP 5 // Set SOAP header $server = new SoapServer($protocol.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'/LogoutNotification.wsdl'); $server->addFunction("LogoutNotification"); $server->handle(); } // Return WSDL else { header('Content-Type: text/xml'); echo <<

WSDL; exit; } /******************************************************************************/ function LogoutNotification($SessionID){ global $CFG, $SESSION, $DB; // Delete session of user using $SessionID if(empty($CFG->dbsessions)) { // File session $dir = $CFG->dataroot .'/sessions'; if (is_dir($dir)) { if ($dh = opendir($dir)) { // Read all session files while (($file = readdir($dh)) !== false) { // Check if it is a file if (is_file($dir.'/'.$file)){ $session_key = preg_replace('/sess_/', '', $file); // Read session file data $data = file($dir.'/'.$file); if (isset($data[0])){ $user_session = unserializesession($data[0]); // Check if we have found session that shall be deleted if (isset($user_session['SESSION']) && isset($user_session['SESSION']->shibboleth_session_id)){ // If there is a match, delete file if ($user_session['SESSION']->shibboleth_session_id == $SessionID){ // Delete session file if (!unlink($dir.'/'.$file)){ return new SoapFault('LogoutError', 'Could not delete Moodle session file.'); } } } } } } closedir($dh); } } } else { // DB Session //TODO: this needs to be rewritten to use new session stuff if (!empty($CFG->sessiontimeout)) { $ADODB_SESS_LIFE = $CFG->sessiontimeout; } if ($user_session_data = $DB->get_records_sql('SELECT sesskey, sessdata FROM {sessions2} WHERE expiry > NOW()')) { foreach ($user_session_data as $session_data) { // Get user session $user_session = adodb_unserialize( urldecode($session_data->sessdata) ); if (isset($user_session['SESSION']) && isset($user_session['SESSION']->shibboleth_session_id)){ // If there is a match, delete file if ($user_session['SESSION']->shibboleth_session_id == $SessionID){ // Delete this session entry if (ADODB_Session::destroy($session_data->sesskey) !== true){ return new SoapFault('LogoutError', 'Could not delete Moodle session entry in database.'); } } } } } } // If now SoapFault was thrown the function will return OK as the SP assumes } /*****************************************************************************/ // Same function as in adodb, but cannot be used for file session for some reason... function unserializesession($serialized_string) { $variables = array(); $a = preg_split("/(\w+)\|/", $serialized_string, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); $counta = count($a); for ($i = 0; $i < $counta; $i = $i+2) { $variables[$a[$i]] = unserialize($a[$i+1]); } return $variables; }