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<?php
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// $Id: oai2.module,v 1.9 2007/01/11 20:59:56 rjerome Exp $
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/**
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* oai2.module for Drupal
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*
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* Copyright (C) 2006 Ron Jerome
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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function oai2_help($section) {
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switch ($section) {
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case 'admin/modules#description':
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// This description is shown in the listing at admin/modules.
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return t('This module provides Open Archives 2 protocol access to the
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information stored by the Biblio module' );
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}
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}
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function oai2_node_name($node) {
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return t('oai2');
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}
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function oai2_node_info() {
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return array('oai2' => array('name' => t('oai2 provider'), 'base' => 'oai2'));
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return array('oai2' => array(
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'name' => t('oai2 provider'),
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'module' => 'oai2',
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'description' => t('This module provides Open Archives 2 protocol access to the
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information stored by the Biblio module')));
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}
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function oai2_access($op, $node) {
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global $user;
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}
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function oai2_perm() {
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}
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function oai2_cron(){
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// cleanup expired resumption tokens
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$expiretime = date("Y-m-d G:i:s", time()-(25*3600));
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db_query("DELETE FROM {oai2_tokens} WHERE timestamp < '%s'",$expiretime);
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}
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function oai2_menu($may_cache) {
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$items = array();
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if ($may_cache) {
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$items[] = array('path' => 'oai', 'title' => t(''),
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'callback' => 'oai2_parse_request',
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'access' => user_access('access content'),
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'type' => MENU_CALLBACK);
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}
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return $items;
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}
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/**
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* Parses the URL and calls the appropriate function to handle the request
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*
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*/
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function oai2_parse_request(){
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global $base_url;
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global $compress ;
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global $error ;
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$compress = true;
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$error = null;
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$xml = '<?xml version="1.0" encoding="UTF-8"?>
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<OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/
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http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd">'."\n";
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$responseDate = gmstrftime('%Y-%m-%dT%TZ');
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// $responseDate = $datetime .'Z';
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$xml .= ' <responseDate>'.$responseDate."</responseDate>\n";
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if (!empty($_GET)) {
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$args = $_GET;
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$getarr = explode('&', $_SERVER['QUERY_STRING']);
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if (count($getarr) != count($args)) {
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$error .= oai2_oai_error( 'sameArgument');
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}
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}
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if (!empty($_POST)) {
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$args = $_POST;
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}
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if (!count($args)) {
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$error .= oai2_oai_error( 'badRequestMethod', $_SERVER['REQUEST_METHOD']);
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}
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unset($args['q']); // get rid of the Drupal q
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if (is_array($args)) {
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foreach ($args as $key => $val) {
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$reqattr .= ' '.$key.'="'.htmlspecialchars(stripslashes($val)).'"';
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}
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}
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//$xml .= ' <request'. $reqattr.'>'.$base_url.'/'.$_GET['q']."</request>\n";
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if (isset($args['verb']) && !$error) {
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switch ($args['verb']) {
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case 'GetRecord':
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$xml .= ' <request verb="'.$args['verb'].'">'.$base_url.'/'.$_GET['q']."</request>\n";
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unset($args['verb']);
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$xml .= oai2_get_record($args);
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break;
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case 'Identify':
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$compress = false;
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$xml .= ' <request verb="'.$args['verb'].'">'.$base_url.'/'.$_GET['q']."</request>\n";
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unset($args['verb']);
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$xml .= oai2_identify( $args);
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break;
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case "ListIdentifiers":
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$xml .= ' <request verb="'.$args['verb'].'">'.$base_url.'/'.$_GET['q']."</request>\n";
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unset($args['verb']);
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$xml .= oai2_list_id_rec($args);
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break;
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case 'ListMetadataFormats':
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$xml .= ' <request verb="'.$args['verb'].'">'.$base_url.'/'.$_GET['q']."</request>\n";
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unset($args['verb']);
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$xml .= oai2_list_metadata_formats($args);
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break;
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case 'ListRecords':
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$xml .= ' <request verb="'.$args['verb'].'">'.$base_url.'/'.$_GET['q']."</request>\n";
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unset($args['verb']);
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$xml .= oai2_list_id_rec($args, true);
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break;
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case 'ListSets':
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$xml .= ' <request verb="'.$args['verb'].'">'.$base_url.'/'.$_GET['q']."</request>\n";
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unset($args['verb']);
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$xml .= oai2_list_sets( $args);
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break;
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default:
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// we never use compression with errors
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$compress = false;
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$xml .= ' <request>'.$base_url.'/'.$_GET['q']."</request>\n";
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$error .= oai2_oai_error( 'badVerb', $args['verb']);
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} /*switch */
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} elseif (!$error) {
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$error .= oai2_oai_error('noVerb');
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} elseif ($error) {
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$xml .= ' <request>'.$base_url.'/'.$_GET['q']."</request>\n";
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}
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if ($compress && !$error) {
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ob_start('ob_gzhandler');
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}
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header('Content-Type: application/xml');
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echo $xml;
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if ($error) echo $error;
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echo "</OAI-PMH>\n";
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if ($compress && !$error) {
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ob_end_flush();
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}
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}
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/**
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* Provides the repository identity information
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*
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* @param $args
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* the arguments passed with the oai verb
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*
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*/
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function oai2_identify( $args){
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global $base_url;
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global $error;
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if (!$errors && (count($args) > 0)){
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foreach ($args as $key=>$val) {
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$error .= oai2_oai_error('badArgument', $key, $val);
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}
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}
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// break and clean up on error
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if ($error) {
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return false;
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}
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$result = db_query("SELECT min(changed) as date FROM {node} as n where n.type='biblio' ");
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$datestamp = db_fetch_object($result);
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$earliestDatestamp = gmstrftime('%Y-%m-%dT%TZ',$datestamp->date);
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$indent = 2;
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$output .= " <Identify>\n";
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$output .= oai2_xmlformat(variable_get('site_name','Biblio OAI'), 'repositoryName', '', $indent);
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$output .= oai2_xmlformat($base_url.'/'.$_GET['q'], 'baseURL', '', $indent);
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$output .= oai2_xmlformat('2.0', 'protocolVersion', '', $indent);
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$output .= oai2_xmlformat(variable_get('site_mail', ini_get('sendmail_from')), 'adminEmail', '', $indent);
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$output .= oai2_xmlformat($earliestDatestamp, 'earliestDatestamp', '', $indent);
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$output .= oai2_xmlformat('no','deletedRecord', '', $indent);
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$output .= oai2_xmlformat('YYYY-MM-DDThh:mm:ssZ', 'granularity', '', $indent);
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$output .= oai2_xmlformat('yes', 'compression', '', $indent);
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// A description MAY be included.
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// Use this if you choose to comply with a specific format of unique identifiers
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// for items.
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// See http://www.openarchives.org/OAI/2.0/guidelines-oai-identifier.htm
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// for details
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if ($show_identifier && $repositoryIdentifier && $delimiter && $sampleIdentifier) {
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$output .=
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' <description>
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<oai-identifier xmlns="http://www.openarchives.org/OAI/2.0/oai-identifier"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai-identifier
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http://www.openarchives.org/OAI/2.0/oai-identifier.xsd">
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<scheme>oai</scheme>
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<repositoryIdentifier>'.$repositoryIdentifier.'</repositoryIdentifier>
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<delimiter>'.$delimiter.'</delimiter>
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<sampleIdentifier>'.$sampleIdentifier.'</sampleIdentifier>
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</oai-identifier>
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</description>'."\n";
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}
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// A description MAY be included.
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// This example from arXiv.org is used by the e-prints community, please adjust
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// see http://www.openarchives.org/OAI/2.0/guidelines-eprints.htm for details
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// To include, change 'false' to 'true'.
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if (false) {
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$output .=
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' <description>
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<eprints xmlns="http://www.openarchives.org/OAI/1.1/eprints"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.openarchives.org/OAI/1.1/eprints
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http://www.openarchives.org/OAI/1.1/eprints.xsd">
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<content>
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<text>Author self-archived e-prints</text>
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</content>
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<metadataPolicy />
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<dataPolicy />
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<submissionPolicy />
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</eprints>
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</description>'."\n";
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}
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// If you want to point harvesters to other repositories, you can list their
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// base URLs. Usage of friends container is RECOMMENDED.
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// see http://www.openarchives.org/OAI/2.0/guidelines-friends.htm
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// for details
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// To include, change 'false' to 'true'.
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if (false) {
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$output .=
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' <description>
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<friends xmlns="http://www.openarchives.org/OAI/2.0/friends/"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/friends/
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http://www.openarchives.org/OAI/2.0/friends.xsd">
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<baseURL>http://naca.larc.nasa.gov/oai2.0/</baseURL>
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<baseURL>http://techreports.larc.nasa.gov/ltrs/oai2.0/</baseURL>
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<baseURL>http://physnet.uni-oldenburg.de/oai/oai2.php</baseURL>
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<baseURL>http://cogprints.soton.ac.uk/perl/oai</baseURL>
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<baseURL>http://ub.uni-duisburg.de:8080/cgi-oai/oai.pl</baseURL>
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<baseURL>http://rocky.dlib.vt.edu/~jcdlpix/cgi-bin/OAI1.1/jcdlpix.pl</baseURL>
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</friends>
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</description>'."\n";
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}
|
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// If you want to provide branding information, adjust accordingly.
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// Usage of friends container is OPTIONAL.
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// see http://www.openarchives.org/OAI/2.0/guidelines-branding.htm
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// for details
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// To include, change 'false' to 'true'.
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if (false) {
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$output .=
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' <description>
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<branding xmlns="http://www.openarchives.org/OAI/2.0/branding/"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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| 291 |
xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/branding/
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| 292 |
http://www.openarchives.org/OAI/2.0/branding.xsd">
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| 293 |
<collectionIcon>
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| 294 |
<url>http://my.site/icon.png</url>
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| 295 |
<link>http://my.site/homepage.html</link>
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<title>MySite(tm)</title>
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<width>88</width>
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<height>31</height>
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</collectionIcon>
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<metadataRendering
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metadataNamespace="http://www.openarchives.org/OAI/2.0/oai_dc/"
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mimeType="text/xsl">http://some.where/DCrender.xsl</metadataRendering>
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<metadataRendering
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metadataNamespace="http://another.place/MARC"
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mimeType="text/css">http://another.place/MARCrender.css</metadataRendering>
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</branding>
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</description>'."\n";
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}
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// End Identify
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$output .= " </Identify>\n";
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return $output;
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}
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| 314 |
|
| 315 |
/**
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* Lists sets available from the repository
|
| 317 |
*
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| 318 |
* @param $args
|
| 319 |
* the arguments passed with the oai verb
|
| 320 |
*
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| 321 |
*/
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| 322 |
function oai2_list_sets( $args){
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| 323 |
global $error;
|
| 324 |
|
| 325 |
foreach($args as $key => $val) {
|
| 326 |
|
| 327 |
switch ($key) {
|
| 328 |
case 'resumptionToken':
|
| 329 |
$resumptionToken = $val;
|
| 330 |
$error .= oai2_oai_error('badResumptionToken', $key, $val);
|
| 331 |
return false;
|
| 332 |
break;
|
| 333 |
|
| 334 |
default:
|
| 335 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 336 |
return false;
|
| 337 |
}
|
| 338 |
}
|
| 339 |
|
| 340 |
$result = db_query('SELECT t.* FROM {biblio_types} as t WHERE t.tid > 0');
|
| 341 |
if (db_num_rows($result)) {
|
| 342 |
$output .= " <ListSets>\n";
|
| 343 |
|
| 344 |
while ($row = db_fetch_object($result)) {
|
| 345 |
$output .= " <set>\n";
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| 346 |
$row->name;
|
| 347 |
$setspec = str_replace(" ","_",strtolower($row->name));
|
| 348 |
$output .= oai2_xmlformat($setspec, 'setSpec', '', 4);
|
| 349 |
$output .= oai2_xmlformat($row->name, 'setName', '', 4);
|
| 350 |
if (isset($val['setDescription']) && $val['setDescription'] != '') {
|
| 351 |
$output .= " <setDescription>\n";
|
| 352 |
$prefix = 'oai_dc';
|
| 353 |
$output .= metadataHeader($prefix);
|
| 354 |
$output .= xmlrecord($val['setDescription'], 'dc:description', '', 7);
|
| 355 |
$output .=
|
| 356 |
' </'.$prefix;
|
| 357 |
if (isset($METADATAFORMATS[$prefix]['record_prefix'])) {
|
| 358 |
$output .= ':'.$METADATAFORMATS[$prefix]['record_prefix'];
|
| 359 |
}
|
| 360 |
$output .= ">\n";
|
| 361 |
$output .= " </setDescription>\n";
|
| 362 |
}
|
| 363 |
$output .= " </set>\n";
|
| 364 |
}
|
| 365 |
$output .= " </ListSets>\n";
|
| 366 |
|
| 367 |
}
|
| 368 |
return $output;
|
| 369 |
}
|
| 370 |
|
| 371 |
/**
|
| 372 |
* Lists metadata formats available from the repository
|
| 373 |
*
|
| 374 |
* @param $args
|
| 375 |
* the arguments passed with the oai verb
|
| 376 |
*
|
| 377 |
*/
|
| 378 |
function oai2_list_metadata_formats($args){
|
| 379 |
global $error;
|
| 380 |
|
| 381 |
foreach($args as $key => $val) {
|
| 382 |
|
| 383 |
switch ($key) {
|
| 384 |
case 'identifier':
|
| 385 |
$identifier = $val;
|
| 386 |
$result = db_query("SELECT nid FROM {node} n WHERE n.nid=%d",$val);
|
| 387 |
if (!db_num_rows($result)){
|
| 388 |
$error .= oai2_oai_error('idDoesNotExist', 'identifier', $identifier);
|
| 389 |
return false;
|
| 390 |
}
|
| 391 |
|
| 392 |
break;
|
| 393 |
|
| 394 |
case 'metadataPrefix':
|
| 395 |
$result = db_query("SELECT * FROM {oai2_metadata_formats} WHERE metadata_prefix='%s' ",$val);
|
| 396 |
if (db_num_rows($result)) {
|
| 397 |
$metadataPrefix = $val;
|
| 398 |
} else {
|
| 399 |
$error .= oai2_oai_error( 'cannotDisseminateFormat', $key, $val);
|
| 400 |
return false;
|
| 401 |
}
|
| 402 |
|
| 403 |
break;
|
| 404 |
|
| 405 |
default:
|
| 406 |
$error .= oai2_oai_error( 'badArgument', $key, $val);
|
| 407 |
return false;
|
| 408 |
}
|
| 409 |
}
|
| 410 |
$result = db_query("SELECT * FROM {oai2_metadata_formats} ");
|
| 411 |
if (db_num_rows($result)) {
|
| 412 |
$output .= " <ListMetadataFormats>\n";
|
| 413 |
while ($fmt = db_fetch_object($result)){
|
| 414 |
$output .= " <metadataFormat>\n";
|
| 415 |
$output .= oai2_xmlformat($fmt->metadata_prefix, 'metadataPrefix', '', 3);
|
| 416 |
$output .= oai2_xmlformat($fmt->schema, 'schema', '', 3);
|
| 417 |
$output .= oai2_xmlformat($fmt->metadata_namespace, 'metadataNamespace', '', 3);
|
| 418 |
$output .= " </metadataFormat>\n";
|
| 419 |
}
|
| 420 |
$output .= " </ListMetadataFormats>\n";
|
| 421 |
|
| 422 |
}else{
|
| 423 |
$error .= oai2_oai_error( 'noMetadataFormats');
|
| 424 |
return false;
|
| 425 |
}
|
| 426 |
|
| 427 |
return $output;
|
| 428 |
}
|
| 429 |
/**
|
| 430 |
* Lists Identifiers or Records based on the value of listrec
|
| 431 |
*
|
| 432 |
* @param $args
|
| 433 |
* the arguments passed with the oai verb
|
| 434 |
*
|
| 435 |
* @param $listrec
|
| 436 |
* if false (or not supplied) function will list identifiers
|
| 437 |
* if true function will list records
|
| 438 |
*
|
| 439 |
*/
|
| 440 |
function oai2_list_id_rec( $args, $listrec=false){
|
| 441 |
global $error;
|
| 442 |
|
| 443 |
$query_args = array();
|
| 444 |
$MAXIDS = 20;
|
| 445 |
$tokenValid = 24*3600;
|
| 446 |
$expirationdatetime = gmstrftime('%Y-%m-%dT%TZ', time()+$tokenValid);
|
| 447 |
foreach($args as $key => $val) {
|
| 448 |
switch ($key) {
|
| 449 |
case 'from':
|
| 450 |
if (!isset($from)) {
|
| 451 |
$from = $val;
|
| 452 |
} else {
|
| 453 |
$error .= oai2_oai_error( 'badArgument', $key, $val);
|
| 454 |
return false;
|
| 455 |
}
|
| 456 |
break;
|
| 457 |
|
| 458 |
case 'until':
|
| 459 |
if (!isset($until)) {
|
| 460 |
$until = $val;
|
| 461 |
} else {
|
| 462 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 463 |
return false;
|
| 464 |
}
|
| 465 |
break;
|
| 466 |
|
| 467 |
case 'set':
|
| 468 |
if (!isset($set)) {
|
| 469 |
$set = $val;
|
| 470 |
} else {
|
| 471 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 472 |
return false;
|
| 473 |
}
|
| 474 |
break;
|
| 475 |
|
| 476 |
case 'metadataPrefix':
|
| 477 |
if (!isset($metadataPrefix)){
|
| 478 |
$result = db_query("SELECT * FROM {oai2_metadata_formats} WHERE metadata_prefix='%s' ",$val);
|
| 479 |
if (db_num_rows($result) && !isset($metadataPrefix) ){
|
| 480 |
$metadataPrefix = $val;
|
| 481 |
} else {
|
| 482 |
$error .= oai2_oai_error( 'cannotDisseminateFormat', $key, $val);
|
| 483 |
return false;
|
| 484 |
}
|
| 485 |
}else{
|
| 486 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 487 |
return false;
|
| 488 |
}
|
| 489 |
break;
|
| 490 |
|
| 491 |
case 'resumptionToken':
|
| 492 |
if (!isset($resumptionToken)) {
|
| 493 |
$resumptionToken = $val;
|
| 494 |
} else {
|
| 495 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 496 |
return false;
|
| 497 |
}
|
| 498 |
break;
|
| 499 |
|
| 500 |
default:
|
| 501 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 502 |
return false;
|
| 503 |
}
|
| 504 |
}
|
| 505 |
// Resume previous session?
|
| 506 |
if (isset($args['resumptionToken'])) {
|
| 507 |
if (count($args) > 1) {
|
| 508 |
// overwrite all other errors
|
| 509 |
$error .= oai2_oai_error( 'exclusiveArgument');
|
| 510 |
return false;
|
| 511 |
} else {
|
| 512 |
$result = db_query("SELECT * FROM {oai2_tokens} WHERE id='%s' ",$resumptionToken);
|
| 513 |
if (db_num_rows($result)) {
|
| 514 |
$token = db_fetch_object($result);
|
| 515 |
$deliveredrecords = $token->deliveredrecords;
|
| 516 |
$extquery = $token->extquery;
|
| 517 |
$metadataPrefix = $token->metadata_prefix;
|
| 518 |
} else {
|
| 519 |
$error .= oai2_oai_error('badResumptionToken', '', $resumptionToken);
|
| 520 |
return false;
|
| 521 |
}
|
| 522 |
}
|
| 523 |
}
|
| 524 |
// no, new session
|
| 525 |
else {
|
| 526 |
$deliveredrecords = 0;
|
| 527 |
$extquery = '';
|
| 528 |
|
| 529 |
if (!isset($args['metadataPrefix'])) {
|
| 530 |
$error .= oai2_oai_error('missingArgument', 'metadataPrefix');
|
| 531 |
return false;
|
| 532 |
}
|
| 533 |
|
| 534 |
if (isset($args['from'])) {
|
| 535 |
if (!$fromgran = _checkDateFormat($from)) {
|
| 536 |
$error .= oai2_oai_error('badGranularity', 'from', $from);
|
| 537 |
return false;
|
| 538 |
}
|
| 539 |
$extquery .= ' AND changed >= %d';
|
| 540 |
$query_args[] = strtotime($from);
|
| 541 |
}
|
| 542 |
|
| 543 |
if (isset($args['until'])) {
|
| 544 |
if (!$untilgran = _checkDateFormat($until)) {
|
| 545 |
$error .= oai2_oai_error('badGranularity', 'until', $until);
|
| 546 |
return false;
|
| 547 |
}
|
| 548 |
$extquery .= ' AND changed <= %d';
|
| 549 |
$query_args[] = strtotime($until);
|
| 550 |
}
|
| 551 |
|
| 552 |
if (isset($args['set'])) {
|
| 553 |
$extquery .= " AND name LIKE '%s'";
|
| 554 |
$query_args[] = $set;
|
| 555 |
}
|
| 556 |
}
|
| 557 |
if((isset($fromgran) && isset($untilgran)) && ($fromgran != $untilgran) ) {
|
| 558 |
$error .= oai2_oai_error('badGranularity', 'mismatched Granularity', $until);
|
| 559 |
return false;
|
| 560 |
}
|
| 561 |
if ($listrec){ // list records...
|
| 562 |
$query = "SELECT * FROM {node} n
|
| 563 |
left join {biblio} b on n.vid=b.vid
|
| 564 |
left join {biblio_types} t on b.biblio_type=t.tid
|
| 565 |
WHERE n.type='biblio' ";
|
| 566 |
|
| 567 |
}else{ // list identifiers...
|
| 568 |
$query = "SELECT n.nid, n.changed, t.name FROM {node} n
|
| 569 |
left join {biblio} b on n.vid=b.vid
|
| 570 |
left join {biblio_types} t on b.biblio_type=t.tid
|
| 571 |
WHERE n.type='biblio' ";
|
| 572 |
}
|
| 573 |
$query_count = "SELECT COUNT(*) FROM {node} n
|
| 574 |
left join {biblio} b on n.vid=b.vid
|
| 575 |
left join {biblio_types} t on b.biblio_type=t.tid
|
| 576 |
WHERE n.type='biblio' ";
|
| 577 |
|
| 578 |
$query .= $extquery;
|
| 579 |
$query_count .= $extquery;
|
| 580 |
$maxresult = db_query($query_count, $query_args);
|
| 581 |
$num_rows = array_pop(db_fetch_array($maxresult));
|
| 582 |
$result = db_query_range($query, $query_args,$deliveredrecords,$MAXIDS);
|
| 583 |
if (db_num_rows($result)) {
|
| 584 |
$output .= ($listrec)?" <ListRecords>\n":" <ListIdentifiers>\n";
|
| 585 |
|
| 586 |
// Will we need a ResumptionToken?
|
| 587 |
if ($num_rows - $deliveredrecords > $MAXIDS) {
|
| 588 |
$token = _get_token();
|
| 589 |
$qargs = implode("#",$query_args);
|
| 590 |
$thendeliveredrecords = (int)$deliveredrecords + $MAXIDS;
|
| 591 |
$query = "INSERT INTO {oai2_tokens} (id,deliveredrecords,extquery,queryargs)
|
| 592 |
VALUES ('%s',%d,'%s','%s')";
|
| 593 |
db_query($query,$token,$thendeliveredrecords,$extquery,$qargs);
|
| 594 |
|
| 595 |
$restoken .= '<resumptionToken expirationDate="'.$expirationdatetime.'" '.
|
| 596 |
' completeListSize="'.$num_rows.'" '.
|
| 597 |
'cursor="'.$deliveredrecords.'" >'. $token;
|
| 598 |
$restoken .= "</resumptionToken>\n";
|
| 599 |
}
|
| 600 |
// Last delivery, return empty ResumptionToken
|
| 601 |
else {
|
| 602 |
|
| 603 |
$restoken .= '<resumptionToken completeListSize="'.$num_rows.'" '.
|
| 604 |
'cursor="'.$deliveredrecords.'" >';
|
| 605 |
$restoken .= "</resumptionToken>\n";
|
| 606 |
}
|
| 607 |
|
| 608 |
$maxrec = min($num_rows - $deliveredrecords, $MAXIDS);
|
| 609 |
|
| 610 |
$countrec = 0;
|
| 611 |
|
| 612 |
while ($countrec++ < $maxrec) {
|
| 613 |
$record = db_fetch_object($result);
|
| 614 |
|
| 615 |
$identifier = $oaiprefix.$record->nid;
|
| 616 |
// $datestamp = date("Y-m-d\TH:i:s\Z",$record->changed);
|
| 617 |
$datestamp = gmstrftime('%Y-%m-%dT%TZ',$record->changed);
|
| 618 |
|
| 619 |
// if (isset($record[$SQL['deleted']]) && ($record[$SQL['deleted']] == 'true') &&
|
| 620 |
// ($deletedRecord == 'transient' || $deletedRecord == 'persistent')) {
|
| 621 |
// $status_deleted = TRUE;
|
| 622 |
// } else {
|
| 623 |
$status_deleted = FALSE;
|
| 624 |
// }
|
| 625 |
if ($listrec){ // list records...
|
| 626 |
$output .= ' <record>'."\n";
|
| 627 |
}
|
| 628 |
$output .= ' <header>'."\n";
|
| 629 |
$output .= oai2_xmlformat($identifier, 'identifier', '', 4);
|
| 630 |
$output .= oai2_xmlformat($datestamp, 'datestamp', '', 4);
|
| 631 |
$setspec = str_replace(" ","_",strtolower($record->name));
|
| 632 |
$output .= oai2_xmlformat($setspec, 'setSpec', '', 4);
|
| 633 |
$output .= ' </header>'."\n";
|
| 634 |
if ($listrec){ // list records...
|
| 635 |
$output .= ' <metadata>'."\n";
|
| 636 |
$prefix = 'oai_dc';
|
| 637 |
$result2 = db_query("SELECT * FROM {oai2_metadata_formats} WHERE name='%s' ",$prefix);
|
| 638 |
if (db_num_rows($result2)) {
|
| 639 |
$format = db_fetch_object($result2);
|
| 640 |
$output .= " <$prefix";
|
| 641 |
if ($format->record_prefix){
|
| 642 |
$output .= ":$format->record_prefix ";
|
| 643 |
}
|
| 644 |
$output .= ' xmlns:'.$prefix.'="'.$format->metadata_namespace.'"';
|
| 645 |
if ($format->record_prefix && $format->record_namespace) {
|
| 646 |
$output .= ' xmlns:'.$format->record_prefix.'="'.$format->record_namespace.'"';
|
| 647 |
}
|
| 648 |
$output .= ' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"';
|
| 649 |
$output .= ' xsi:schemaLocation="'.$format->metadata_namespace."\n". $format->schema.'" >';
|
| 650 |
|
| 651 |
$output .= _get_record_oai_dc($record );
|
| 652 |
|
| 653 |
$output .= " </$prefix";
|
| 654 |
if ($format->record_prefix){
|
| 655 |
$output .= ":$format->record_prefix ";
|
| 656 |
}
|
| 657 |
$output .= ">\n";
|
| 658 |
$output .= "</metadata>\n";
|
| 659 |
}
|
| 660 |
}
|
| 661 |
if ($listrec) $output .= ' </record>'."\n";
|
| 662 |
|
| 663 |
}
|
| 664 |
if (isset($restoken)) {
|
| 665 |
$output .= $restoken;
|
| 666 |
}
|
| 667 |
$output .= ($listrec)?" </ListRecords>\n":" </ListIdentifiers>\n";
|
| 668 |
|
| 669 |
}else{
|
| 670 |
$error .= oai2_oai_error('noRecordsMatch');
|
| 671 |
return false;
|
| 672 |
}
|
| 673 |
|
| 674 |
|
| 675 |
return $output;
|
| 676 |
|
| 677 |
}
|
| 678 |
|
| 679 |
function oai2_get_record( $args){
|
| 680 |
global $error;
|
| 681 |
|
| 682 |
foreach($args as $key => $val) {
|
| 683 |
switch ($key) {
|
| 684 |
case 'identifier':
|
| 685 |
$identifier = $val;
|
| 686 |
break;
|
| 687 |
|
| 688 |
case 'metadataPrefix':
|
| 689 |
$result = db_query("SELECT * FROM {oai2_metadata_formats} WHERE metadata_prefix='%s' ",$val);
|
| 690 |
if (db_num_rows($result)) {
|
| 691 |
$metadataPrefix = $val;
|
| 692 |
} else {
|
| 693 |
$error .= oai2_oai_error('cannotDisseminateFormat', $key, $val);
|
| 694 |
return false;
|
| 695 |
}
|
| 696 |
|
| 697 |
break;
|
| 698 |
default:
|
| 699 |
$error .= oai2_oai_error('badArgument', $key, $val);
|
| 700 |
return false;
|
| 701 |
|
| 702 |
}
|
| 703 |
}
|
| 704 |
|
| 705 |
if (!isset($args['identifier'])) {
|
| 706 |
$error .= oai2_oai_error('missingArgument', 'identifier');
|
| 707 |
return false;
|
| 708 |
}
|
| 709 |
if (!isset($args['metadataPrefix'])) {
|
| 710 |
$error .= oai2_oai_error('missingArgument', 'metadataPrefix');
|
| 711 |
return false;
|
| 712 |
}
|
| 713 |
|
| 714 |
// remove the OAI part to get the identifier
|
| 715 |
$id = str_replace($oaiprefix, '', $identifier);
|
| 716 |
if ($id == '') {
|
| 717 |
$error .= oai2_oai_error('idDoesNotExist', '', $identifier);
|
| 718 |
return false;
|
| 719 |
}
|
| 720 |
|
| 721 |
$query = "SELECT * FROM {node} n
|
| 722 |
left join {biblio} b on n.nid=b.nid
|
| 723 |
left join {biblio_types} t on b.biblio_type=t.tid
|
| 724 |
WHERE n.nid=%d ";
|
| 725 |
$result = db_query(db_rewrite_sql($query),$id);
|
| 726 |
if (!db_num_rows($result)) {
|
| 727 |
$error .= oai2_oai_error('idDoesNotExist', '', $identifier);
|
| 728 |
return false;
|
| 729 |
}else{
|
| 730 |
$record = db_fetch_object($result);
|
| 731 |
}
|
| 732 |
$output .= " <GetRecord>\n";
|
| 733 |
|
| 734 |
$identifier = $oaiprefix.$record->nid;
|
| 735 |
// $datestamp = date("Y-m-d\TH:i:s\Z",$record->changed);
|
| 736 |
$datestamp = gmstrftime('%Y-%m-%dT%TZ',$record->changed);
|
| 737 |
// if (isset($record[$SQL['deleted']]) && ($record[$SQL['deleted']] == 'true') &&
|
| 738 |
// ($deletedRecord == 'transient' || $deletedRecord == 'persistent')) {
|
| 739 |
// $status_deleted = TRUE;
|
| 740 |
// } else {
|
| 741 |
$status_deleted = FALSE;
|
| 742 |
// }
|
| 743 |
|
| 744 |
$output .= ' <record>'."\n";
|
| 745 |
$output .= ' <header';
|
| 746 |
if ($status_deleted) {
|
| 747 |
$output .= ' status="deleted"';
|
| 748 |
}
|
| 749 |
$output .='>'."\n";
|
| 750 |
$output .= oai2_xmlformat($identifier, 'identifier', '', 4);
|
| 751 |
$output .= oai2_xmlformat($datestamp, 'datestamp', '', 4);
|
| 752 |
$setspec = str_replace(" ","_",strtolower($record->name));
|
| 753 |
$output .= oai2_xmlformat($setspec, 'setSpec', '', 4);
|
| 754 |
$output .= ' </header>'."\n";
|
| 755 |
|
| 756 |
$output .= ' <metadata>'."\n";
|
| 757 |
$prefix = 'oai_dc';
|
| 758 |
$result = db_query("SELECT * FROM {oai2_metadata_formats} WHERE name='%s' ",$prefix);
|
| 759 |
if (db_num_rows($result)) {
|
| 760 |
$format = db_fetch_object($result);
|
| 761 |
$output .= " <$prefix";
|
| 762 |
if ($format->record_prefix){
|
| 763 |
$output .= ":$format->record_prefix ";
|
| 764 |
}
|
| 765 |
$output .= 'xmlns:'.$prefix.'="'.$format->metadata_namespace.'"';
|
| 766 |
if ($format->record_prefix && $format->record_namespace) {
|
| 767 |
$output .= ' xmlns:'.$format->record_prefix.'="'.$format->record_namespace.'" ';
|
| 768 |
}
|
| 769 |
$output .= ' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ';
|
| 770 |
$output .= ' xsi:schemaLocation="'.$format->metadata_namespace."\n". $format->schema.'" >';
|
| 771 |
|
| 772 |
$output .= _get_record_oai_dc($record );
|
| 773 |
|
| 774 |
$output .= " </$prefix";
|
| 775 |
if ($format->record_prefix){
|
| 776 |
$output .= ":$format->record_prefix ";
|
| 777 |
}
|
| 778 |
$output .= ">\n";
|
| 779 |
$output .= "</metadata>\n";
|
| 780 |
}
|
| 781 |
$output .= "</record>";
|
| 782 |
$output .= ' </GetRecord>'."\n";
|
| 783 |
|
| 784 |
return $output;
|
| 785 |
|
| 786 |
}
|
| 787 |
|
| 788 |
function _get_record_oai_dc($record ){
|
| 789 |
global $base_url;
|
| 790 |
|
| 791 |
$indent = 6;
|
| 792 |
$output .= oai2_xmlformat($record->title, 'dc:title', '', $indent);
|
| 793 |
$author_array = explode(";", $record->biblio_authors);
|
| 794 |
foreach($author_array as $auth) {
|
| 795 |
$output .= oai2_xmlformat(trim($auth), 'dc:creator', '', $indent);
|
| 796 |
}
|
| 797 |
$output .= oai2_xmlformat($record->biblio_year, 'dc:date', '', $indent);
|
| 798 |
$output .= oai2_xmlformat("Text", 'dc:type', '', $indent);
|
| 799 |
$output .= oai2_xmlformat($record->biblio_lang, 'dc:language', '', $indent);
|
| 800 |
if ($record->biblio_keywords)
|
| 801 |
$output .= oai2_xmlformat($record->biblio_keywords, 'dc:subject', '', $indent);
|
| 802 |
if ($record->biblio_abst_e)
|
| 803 |
$output .= oai2_xmlformat($record->biblio_abst_e, 'dc:description', '', $indent);
|
| 804 |
if ($record->biblio_publisher)
|
| 805 |
$output .= oai2_xmlformat($record->biblio_publisher, 'dc:publisher', '', $indent);
|
| 806 |
if ($record->biblio_url)
|
| 807 |
$output .= oai2_xmlformat($record->biblio_url, 'dc:identifier', '', $indent);
|
| 808 |
if ($record->biblio_isbn){
|
| 809 |
$output .= oai2_xmlformat($record->isbn, 'dc:identifier', '', $indent);
|
| 810 |
}else{
|
| 811 |
$output .= oai2_xmlformat($base_url."/node/".$record->nid, 'dc:identifier', '', $indent);
|
| 812 |
}
|
| 813 |
if ($record->biblio_corp_author)
|
| 814 |
$output .= oai2_xmlformat($record->biblio_corp_author, 'dc:contributor', '', $indent);
|
| 815 |
|
| 816 |
/* The following dc elements are currently not published...
|
| 817 |
|
| 818 |
$output .= xmlrecord($record['dc_format'], 'dc:format', '', $indent);
|
| 819 |
$output .= xmlrecord($record['dc_source'], 'dc:source', '', $indent);
|
| 820 |
$output .= xmlrecord($record['dc_relation'], 'dc:relation', '', $indent);
|
| 821 |
$output .= xmlrecord($record['dc_coverage'], 'dc:coverage', '', $indent);
|
| 822 |
$output .= xmlrecord($record['dc_rights'], 'dc:rights', '', $indent);
|
| 823 |
*/
|
| 824 |
|
| 825 |
return $output;
|
| 826 |
}
|
| 827 |
|
| 828 |
function _get_token() {
|
| 829 |
//list($usec, $sec) = explode(" ", microtime());
|
| 830 |
return uniqid(); //(int)$sec + floor($usec*1000);//+ ;floor($usec*10000)
|
| 831 |
}
|
| 832 |
|
| 833 |
function _checkDateFormat($date) {
|
| 834 |
|
| 835 |
// global $granularity;
|
| 836 |
global $message;
|
| 837 |
// $granularity = variable_get('granularity', 'YYYY-MM-DDThh:mm:ssZ');
|
| 838 |
// if ($granularity == 'YYYY-MM-DDThh:mm:ssZ') {
|
| 839 |
$checkstr1 = '([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})T([0-9]{2}):([0-9]{2}):([0-9]{2})Z$';
|
| 840 |
// } else {
|
| 841 |
$checkstr2 = '([0-9]{4})-([0-9]{1,2})-([0-9]{1,2}$)';
|
| 842 |
// }
|
| 843 |
if (ereg($checkstr1, $date, $regs)) {
|
| 844 |
if (checkdate($regs[2], $regs[3], $regs[1])) {
|
| 845 |
return 1;
|
| 846 |
}
|
| 847 |
} elseif (ereg($checkstr2, $date, $regs)) {
|
| 848 |
if (checkdate($regs[2], $regs[3], $regs[1])) {
|
| 849 |
return 2;
|
| 850 |
}
|
| 851 |
} else {
|
| 852 |
$message = "Invalid Date: $date is not a valid date.";
|
| 853 |
return 0;
|
| 854 |
}
|
| 855 |
// else {
|
| 856 |
// $message = "Invalid Date Format: $date does not comply to the date format $granularity.";
|
| 857 |
// return 0;
|
| 858 |
// }
|
| 859 |
}
|
| 860 |
|
| 861 |
|
| 862 |
function oai2_oai_error($code, $argument='', $value='')
|
| 863 |
{
|
| 864 |
global $compress;
|
| 865 |
|
| 866 |
switch ($code) {
|
| 867 |
case 'badArgument' :
|
| 868 |
$text = "The argument $argument (value=$value) included in the request is not valid.";
|
| 869 |
break;
|
| 870 |
|
| 871 |
case 'badGranularity' :
|
| 872 |
$text = "The value $value of the argument '$argument' is not valid.";
|
| 873 |
$code = 'badArgument';
|
| 874 |
break;
|
| 875 |
|
| 876 |
case 'badResumptionToken' :
|
| 877 |
$text = "The resumptionToken $value does not exist or has already expired.";
|
| 878 |
break;
|
| 879 |
|
| 880 |
case 'badRequestMethod' :
|
| 881 |
$text = "The request method $argument is unknown.";
|
| 882 |
$code = 'badVerb';
|
| 883 |
break;
|
| 884 |
|
| 885 |
case 'badVerb' :
|
| 886 |
$text = "The verb $argument provided in the request is illegal.";
|
| 887 |
break;
|
| 888 |
|
| 889 |
case 'cannotDisseminateFormat' :
|
| 890 |
$text = "The metadata format $value given by $argument is not supported by this repository.";
|
| 891 |
break;
|
| 892 |
|
| 893 |
case 'exclusiveArgument' :
|
| 894 |
$text = 'The usage of resumptionToken as an argument allows no other arguments.';
|
| 895 |
$code = 'badArgument';
|
| 896 |
break;
|
| 897 |
|
| 898 |
case 'idDoesNotExist' :
|
| 899 |
$text = "The value $value of the identifier is illegal for this repository.";
|
| 900 |
break;
|
| 901 |
|
| 902 |
case 'missingArgument' :
|
| 903 |
$text = "The required argument $argument is missing in the request.";
|
| 904 |
$code = 'badArgument';
|
| 905 |
break;
|
| 906 |
|
| 907 |
case 'noRecordsMatch' :
|
| 908 |
$text = 'The combination of the given values results in an empty list.';
|
| 909 |
break;
|
| 910 |
|
| 911 |
case 'noMetadataFormats' :
|
| 912 |
$text = 'There are no metadata formats available for the specified item.';
|
| 913 |
break;
|
| 914 |
|
| 915 |
case 'noVerb' :
|
| 916 |
$text = 'The request does not provide any verb.';
|
| 917 |
$code = 'badVerb';
|
| 918 |
break;
|
| 919 |
|
| 920 |
case 'noSetHierarchy' :
|
| 921 |
$text = 'This repository does not support sets.';
|
| 922 |
break;
|
| 923 |
|
| 924 |
case 'sameArgument' :
|
| 925 |
$text = 'Do not use them same argument more than once.';
|
| 926 |
$code = 'badArgument';
|
| 927 |
break;
|
| 928 |
|
| 929 |
case 'sameVerb' :
|
| 930 |
$text = 'Do not use verb more than once.';
|
| 931 |
$code = 'badVerb';
|
| 932 |
break;
|
| 933 |
|
| 934 |
default:
|
| 935 |
$text = "Unknown error: code: $code, argument: $argument, value: $value";
|
| 936 |
$code = 'badArgument';
|
| 937 |
}
|
| 938 |
|
| 939 |
$error = ' <error code="'.oai2_xmlstr($code, 'iso8859-1', false).'">'.oai2_xmlstr($text, 'iso8859-1', false)."</error>\n";
|
| 940 |
return $error;
|
| 941 |
}
|
| 942 |
function oai2_xmlstr($string, $charset = 'iso8859-1', $xmlescaped = 'false')
|
| 943 |
{
|
| 944 |
$xmlstr = stripslashes(trim($string));
|
| 945 |
// just remove invalid characters
|
| 946 |
$pattern ="/[\x-\x8\xb-\xc\xe-\x1f]/";
|
| 947 |
$xmlstr = preg_replace($pattern, '', $xmlstr);
|
| 948 |
|
| 949 |
// escape only if string is not escaped
|
| 950 |
if (!$xmlescaped) {
|
| 951 |
$xmlstr = htmlspecialchars($xmlstr, ENT_QUOTES);
|
| 952 |
}
|
| 953 |
|
| 954 |
// if ($charset != "utf-8") {
|
| 955 |
// $xmlstr = utf8_encode($xmlstr);
|
| 956 |
// }
|
| 957 |
|
| 958 |
return $xmlstr;
|
| 959 |
}
|
| 960 |
function oai2_xmlformat($record, $element, $attr = '', $indent = 0)
|
| 961 |
{
|
| 962 |
global $charset;
|
| 963 |
global $xmlescaped;
|
| 964 |
|
| 965 |
if ($attr != '') {
|
| 966 |
$attr = ' '.$attr;
|
| 967 |
}
|
| 968 |
|
| 969 |
$str = '';
|
| 970 |
if (is_array($record)) {
|
| 971 |
foreach ($record as $val) {
|
| 972 |
$str .= str_pad('', $indent).'<'.$element.$attr.'>'.oai2_xmlstr($val, $charset, $xmlescaped).'</'.$element.">\n";
|
| 973 |
}
|
| 974 |
return $str;
|
| 975 |
} elseif ($record != '') {
|
| 976 |
return str_pad('', $indent).'<'.$element.$attr.'>'.oai2_xmlstr($record, $charset, $xmlescaped).'</'.$element.">\n";
|
| 977 |
} else {
|
| 978 |
return '';
|
| 979 |
}
|
| 980 |
}
|
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