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https://github.com/moodle/moodle.git
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119 lines
4.2 KiB
PHP
119 lines
4.2 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle 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 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle 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
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* This file is used to call any registered externallib function in Moodle.
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*
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* It will process more than one request and return more than one response if required.
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* It is recommended to add webservice functions and re-use this script instead of
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* writing any new custom ajax scripts.
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*
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* @since Moodle 2.9
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* @package core
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* @copyright 2015 Damyon Wiese
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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use core_external\external_api;
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use core_external\external_settings;
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define('AJAX_SCRIPT', true);
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// Services can declare 'readonlysession' in their config located in db/services.php, if not present will default to false.
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define('READ_ONLY_SESSION', true);
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if (!empty($_GET['nosessionupdate'])) {
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define('NO_SESSION_UPDATE', true);
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}
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require_once(__DIR__ . '/../../config.php');
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define('PREFERRED_RENDERER_TARGET', RENDERER_TARGET_GENERAL);
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$arguments = '';
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$cacherequest = false;
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if (defined('ALLOW_GET_PARAMETERS')) {
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$arguments = optional_param('args', '', PARAM_RAW);
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$cachekey = optional_param('cachekey', '', PARAM_INT);
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if ($cachekey && $cachekey > 0 && $cachekey <= time()) {
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$cacherequest = true;
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}
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}
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// Either we are not allowing GET parameters or we didn't use GET because
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// we did not pass a cache key or the URL was too long.
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if (empty($arguments)) {
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$arguments = file_get_contents('php://input');
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}
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$requests = json_decode($arguments, true);
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if ($requests === null) {
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$lasterror = json_last_error_msg();
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throw new coding_exception('Invalid json in request: ' . $lasterror);
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}
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$responses = [];
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// Defines the external settings required for Ajax processing.
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$settings = external_settings::get_instance();
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$settings->set_file('pluginfile.php');
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$settings->set_fileurl(true);
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$settings->set_filter(true);
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$settings->set_raw(false);
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$haserror = false;
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foreach ($requests as $request) {
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$response = [];
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$methodname = clean_param($request['methodname'], PARAM_ALPHANUMEXT);
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$index = clean_param($request['index'], PARAM_INT);
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$args = $request['args'];
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$response = external_api::call_external_function($methodname, $args, true);
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$responses[$index] = $response;
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if ($response['error']) {
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$haserror = true;
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if (!NO_MOODLE_COOKIES) {
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// If there was an error, and this HTTP request includes a Moodle cookie (and therefore a login), reject all
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// subsequent changes.
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//
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// The reason for this is that an earlier step may be performing a dependant action. Consider the following:
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// 1) Backup a thing
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// 2) Reset the thing to its initial state
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// 3) Restore the thing from the backup made in step 1.
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//
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// In the above example you do not want steps 2 and 3 to happen if step 1 fails.
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// Do not process the remaining requests.
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// If the request came through service-nologin.php which does not allow any kind of login,
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// then it is not possible to make changes to the DB, session, site, etc.
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// For all other cases, we *MUST* stop processing subsequent requests.
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break;
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}
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}
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}
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if ($cacherequest && !$haserror) {
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// 90 days only - based on Moodle point release cadence being every 3 months.
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$lifetime = 60 * 60 * 24 * 90;
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header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
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header('Pragma: ');
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header('Cache-Control: public, max-age=' . $lifetime . ', immutable');
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header('Accept-Ranges: none');
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}
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echo json_encode($responses);
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