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repository_ajax.php
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repository_ajax.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* The Web service script that is called from the filepicker front end
*
* @since 2.0
* @package moodlecore
* @subpackage repository
* @copyright 2009 Dongsheng Cai <[email protected]>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once('../config.php');
require_once('../lib/filelib.php');
require_once('lib.php');
require_login();
/// Parameters
$action = optional_param('action', '', PARAM_ALPHA);
$repo_id = optional_param('repo_id', 1, PARAM_INT); // repository ID
$callback = optional_param('callback', '', PARAM_CLEANHTML);
$client_id = optional_param('client_id', SITEID, PARAM_RAW); // client ID
$contextid = optional_param('ctx_id', SITEID, PARAM_INT); // context ID
$env = optional_param('env', 'filepicker', PARAM_ALPHA); // opened in editor or moodleform
$file = optional_param('file', '', PARAM_RAW); // file to download
$itemid = optional_param('itemid', '', PARAM_INT);
$title = optional_param('title', '', PARAM_FILE); // new file name
$page = optional_param('page', '', PARAM_RAW); // page
$maxbytes = optional_param('maxbytes', -1, PARAM_INT); // repository ID
$req_path = optional_param('p', '', PARAM_RAW); // path
$save_path = optional_param('savepath', '/', PARAM_PATH);
$search_text = optional_param('s', '', PARAM_CLEANHTML);
$linkexternal = optional_param('linkexternal', '', PARAM_ALPHA);
/// Headers to make it not cacheable
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
$err = new stdclass;
$err->client_id = $client_id;
/// Check permissions
if (! (isloggedin() && repository::check_context($contextid)) ) {
$err->e = get_string('nopermissiontoaccess', 'repository');
die(json_encode($err));
}
/// Wait as long as it takes for this script to finish
set_time_limit(0);
/// Check for actions that do not need repository ID
switch ($action) {
case 'gsearch': // Global Search
$params = array();
$params['context'] = array(get_context_instance_by_id($contextid), get_system_context());
$params['currentcontext'] = get_context_instance_by_id($contextid);
$repos = repository::get_instances($params);
$list = array();
foreach($repos as $repo){
if ($repo->global_search()) {
try {
$ret = $repo->search($search_text);
array_walk($ret['list'], 'repository_attach_id', $repo->id); // See function below
$tmp = array_merge($list, $ret['list']);
$list = $tmp;
} catch (repository_exception $e) {
$err->e = $e->getMessage();
die(json_encode($err));
}
}
}
$listing = array('list'=>$list);
$listing['gsearch'] = true;
$listing['client_id'] = $client_id;
die(json_encode($listing));
break;
case 'ccache': // Clean cache
$cache = new curl_cache;
$cache->refresh();
$action = 'list';
break;
}
/// Get repository instance information
$sql = 'SELECT i.name, i.typeid, r.type FROM {repository} r, {repository_instances} i '.
'WHERE i.id=? AND i.typeid=r.id';
if (!$repository = $DB->get_record_sql($sql, array($repo_id))) {
$err->e = get_string('invalidrepositoryid', 'repository');
die(json_encode($err));
} else {
$type = $repository->type;
}
if (file_exists($CFG->dirroot.'/repository/'.$type.'/repository.class.php')) {
require_once($CFG->dirroot.'/repository/'.$type.'/repository.class.php');
$classname = 'repository_' . $type;
try {
$repo = new $classname($repo_id, $contextid, array('ajax'=>true, 'name'=>$repository->name, 'type'=>$type, 'client_id'=>$client_id));
} catch (repository_exception $e){
$err->e = $e->getMessage();
die(json_encode($err));
}
} else {
$err->e = get_string('invalidplugin', 'repository', $type);
die(json_encode($err));
}
if (!empty($callback)) {
// call opener window to refresh repository
// the callback url should be something like this:
// http://xx.moodle.com/repository/repository_ajax.php?callback=yes&repo_id=1&sid=xxx
// sid is the attached auth token from external source
// If Moodle is working on HTTPS mode, then we are not allowed to access
// parent window, in this case, we need to alert user to refresh the repository
// manually.
$strhttpsbug = get_string('cannotaccessparentwin', 'repository');
$strrefreshnonjs = get_string('refreshnonjsfilepicker', 'repository');
$js =<<<EOD
<html><head>
<script type="text/javascript">
if(window.opener){
M.core_filepicker.active.list();
window.close();
} else {
alert("{$strhttpsbug }");
}
</script>
<body>
<noscript>
{$strrefreshnonjs}
</noscript>
</body>
</html>
EOD;
echo $js;
die;
}
/// These actions all occur on the currently active repository instance
switch ($action) {
case 'sign':
case 'signin':
case 'list':
if ($repo->check_login()) {
try {
$listing = $repo->get_listing($req_path, $page);
$listing['client_id'] = $client_id;
$listing['repo_id'] = $repo_id;
echo json_encode($listing);
} catch (repository_exception $e) {
$err->e = $e->getMessage();
die(json_encode($err));
}
break;
} else {
$action = 'login';
}
case 'login':
try {
$listing = $repo->print_login();
$listing['client_id'] = $client_id;
$listing['repo_id'] = $repo_id;
echo json_encode($listing);
} catch (repository_exception $e){
$err->e = $e->getMessage();
die(json_encode($err));
}
break;
case 'logout':
$logout = $repo->logout();
$logout['client_id'] = $client_id;
$logout['repo_id'] = $repo_id;
echo json_encode($logout);
break;
case 'searchform':
$search_form['form'] = $repo->print_search($client_id);
$search_form['client_id'] = $client_id;
echo json_encode($search_form);
break;
case 'search':
try {
$search_result = $repo->search($search_text, (int)$page);
$search_result['client_id'] = $client_id;
$search_result['repo_id'] = $repo_id;
$search_result['search_result'] = true;
echo json_encode($search_result);
} catch (repository_exception $e) {
$err->e = $e->getMessage();
die(json_encode($err));
}
break;
case 'download':
try {
// we have two special repoisitory type need to deal with
if ($repo->options['type'] == 'local') {
$fileinfo = $repo->move_to_draft($file, $title, $itemid, $save_path);
$info = array();
$info['client_id'] = $client_id;
$info['file'] = $fileinfo['title'];
$info['id'] = $itemid;
$info['url'] = $CFG->httpswwwroot.'/draftfile.php/'.$fileinfo['contextid'].'/user_draft/'.$itemid.'/'.$fileinfo['title'];
$filesize = $fileinfo['filesize'];
if (($maxbytes!==-1) && ($filesize > $maxbytes)) {
$fileinfo->delete();
throw new file_exception('maxbytes');
}
die(json_encode($info));
}
$allowexternallink = (int)get_config(null, 'repositoryallowexternallinks');
if (!empty($allowexternallink)) {
$allowexternallink = true;
} else {
$allowexternallink = false;
}
// allow external links in url element all the time
$allowexternallink = ($allowexternallink || ($env == 'url'));
if ($allowexternallink and $linkexternal === 'yes' and ($repo->supported_returntypes() || FILE_EXTERNAL)) {
try {
$link = $repo->get_link($file);
} catch (repository_exception $e){
}
$info = array();
$info['filename'] = $title;
$info['type'] = 'link';
$info['url'] = $link;
die(json_encode($info));
}
// get the file location
$filepath = $repo->get_file($file, $title, $itemid, $save_path);
if ($filepath === false) {
$err->e = get_string('cannotdownload', 'repository');
die(json_encode($err));
}
if (($maxbytes!==-1) && (filesize($filepath) > $maxbytes)) {
throw new file_exception('maxbytes');
}
$info = repository::move_to_filepool($filepath, $title, $itemid, $save_path);
if (empty($info)) {
$info['e'] = get_string('error', 'moodle');
}
echo json_encode($info);
} catch (repository_exception $e){
$err->e = $e->getMessage();
die(json_encode($err));
} catch (Exception $e) {
$err->e = $e->getMessage();
die(json_encode($err));
}
break;
case 'upload':
try {
$result = $repo->upload();
$result['client_id'] = $client_id;
echo json_encode($result);
} catch (Exception $e){
$err->e = $e->getMessage();
$err->client_id = $client_id;
die(json_encode($err));
}
break;
}
/**
* Small function to walk an array to attach repository ID
*/
function repository_attach_id(&$value, $key, $id){
$value['repo_id'] = $id;
}