1<?php 2// This file is part of Moodle - http://moodle.org/ 3// 4// Moodle is free software: you can redistribute it and/or modify 5// it under the terms of the GNU General Public License as published by 6// the Free Software Foundation, either version 3 of the License, or 7// (at your option) any later version. 8// 9// Moodle is distributed in the hope that it will be useful, 10// but WITHOUT ANY WARRANTY; without even the implied warranty of 11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12// GNU General Public License for more details. 13// 14// You should have received a copy of the GNU General Public License 15// along with Moodle. If not, see <http://www.gnu.org/licenses/>. 16 17/** 18 * This file is used to call any registered externallib function in Moodle. 19 * 20 * It will process more than one request and return more than one response if required. 21 * It is recommended to add webservice functions and re-use this script instead of 22 * writing any new custom ajax scripts. 23 * 24 * @since Moodle 2.9 25 * @package core 26 * @copyright 2015 Damyon Wiese 27 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 28 */ 29 30define('AJAX_SCRIPT', true); 31// Services can declare 'readonlysession' in their config located in db/services.php, if not present will default to false. 32define('READ_ONLY_SESSION', true); 33 34if (!empty($_GET['nosessionupdate'])) { 35 define('NO_SESSION_UPDATE', true); 36} 37 38require_once(__DIR__ . '/../../config.php'); 39require_once($CFG->libdir . '/externallib.php'); 40 41define('PREFERRED_RENDERER_TARGET', RENDERER_TARGET_GENERAL); 42 43$arguments = ''; 44$cacherequest = false; 45if (defined('ALLOW_GET_PARAMETERS')) { 46 $arguments = optional_param('args', '', PARAM_RAW); 47 $cachekey = optional_param('cachekey', '', PARAM_INT); 48 if ($cachekey && $cachekey > 0 && $cachekey <= time()) { 49 $cacherequest = true; 50 } 51} 52 53// Either we are not allowing GET parameters or we didn't use GET because 54// we did not pass a cache key or the URL was too long. 55if (empty($arguments)) { 56 $arguments = file_get_contents('php://input'); 57} 58 59$requests = json_decode($arguments, true); 60 61if ($requests === null) { 62 $lasterror = json_last_error_msg(); 63 throw new coding_exception('Invalid json in request: ' . $lasterror); 64} 65$responses = array(); 66 67// Defines the external settings required for Ajax processing. 68$settings = external_settings::get_instance(); 69$settings->set_file('pluginfile.php'); 70$settings->set_fileurl(true); 71$settings->set_filter(true); 72$settings->set_raw(false); 73 74$haserror = false; 75foreach ($requests as $request) { 76 $response = array(); 77 $methodname = clean_param($request['methodname'], PARAM_ALPHANUMEXT); 78 $index = clean_param($request['index'], PARAM_INT); 79 $args = $request['args']; 80 81 $response = external_api::call_external_function($methodname, $args, true); 82 $responses[$index] = $response; 83 if ($response['error']) { 84 // Do not process the remaining requests. 85 $haserror = true; 86 break; 87 } 88} 89 90if ($cacherequest && !$haserror) { 91 // 90 days only - based on Moodle point release cadence being every 3 months. 92 $lifetime = 60 * 60 * 24 * 90; 93 94 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT'); 95 header('Pragma: '); 96 header('Cache-Control: public, max-age=' . $lifetime . ', immutable'); 97 header('Accept-Ranges: none'); 98} 99 100echo json_encode($responses); 101