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service.php
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service.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/>.
/**
* This file is used to call any registered externallib function in Moodle.
*
* It will process more than one request and return more than one response if required.
* It is recommended to add webservice functions and re-use this script instead of
* writing any new custom ajax scripts.
*
* @since Moodle 2.9
* @package core
* @copyright 2015 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
define('AJAX_SCRIPT', true);
require_once(dirname(__FILE__) . '/../../config.php');
require_once($CFG->libdir . '/externallib.php');
$rawjson = file_get_contents('php://input');
$requests = json_decode($rawjson, true);
if ($requests === null) {
$lasterror = json_last_error_msg();
throw new coding_exception('Invalid json in request: ' . $lasterror);
}
$responses = array();
foreach ($requests as $request) {
$response = array();
$methodname = clean_param($request['methodname'], PARAM_ALPHANUMEXT);
$index = clean_param($request['index'], PARAM_INT);
$args = $request['args'];
try {
$externalfunctioninfo = external_function_info($methodname);
if (!$externalfunctioninfo->allowed_from_ajax) {
error_log('This external function is not available to ajax. Failed to call "' . $methodname . '"');
throw new moodle_exception('servicenotavailable', 'webservice');
}
// Do not allow access to write or delete webservices as a public user.
if ($externalfunctioninfo->loginrequired) {
if (defined('NO_MOODLE_COOKIES') && NO_MOODLE_COOKIES) {
error_log('Set "loginrequired" to false in db/service.php when calling entry point service-nologin.php. ' .
'Failed to call "' . $methodname . '"');
throw new moodle_exception('servicenotavailable', 'webservice');
}
if (!isloggedin()) {
error_log('This external function is not available to public users. Failed to call "' . $methodname . '"');
throw new moodle_exception('servicenotavailable', 'webservice');
} else {
require_sesskey();
}
}
// Validate params, this also sorts the params properly, we need the correct order in the next part.
$callable = array($externalfunctioninfo->classname, 'validate_parameters');
$params = call_user_func($callable,
$externalfunctioninfo->parameters_desc,
$args);
// Execute - gulp!
$callable = array($externalfunctioninfo->classname, $externalfunctioninfo->methodname);
$result = call_user_func_array($callable,
array_values($params));
// Validate the return parameters.
if ($externalfunctioninfo->returns_desc !== null) {
$callable = array($externalfunctioninfo->classname, 'clean_returnvalue');
$result = call_user_func($callable, $externalfunctioninfo->returns_desc, $result);
}
$response['error'] = false;
$response['data'] = $result;
$responses[$index] = $response;
} catch (Exception $e) {
$jsonexception = get_exception_info($e);
unset($jsonexception->a);
if (!debugging('', DEBUG_DEVELOPER)) {
unset($jsonexception->debuginfo);
unset($jsonexception->backtrace);
}
$response['error'] = true;
$response['exception'] = $jsonexception;
$responses[$index] = $response;
// Do not process the remaining requests.
break;
}
}
echo json_encode($responses);