Proyectos de Subversion Moodle

<?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

 */

use core_external\external_api;

use core_external\external_settings;

define('AJAX_SCRIPT', true);

// Services can declare 'readonlysession' in their config located in db/services.php, if not present will default to false.

define('READ_ONLY_SESSION', true);

if (!empty($_GET['nosessionupdate'])) {

    define('NO_SESSION_UPDATE', true);

}

require_once(__DIR__ . '/../../config.php');

define('PREFERRED_RENDERER_TARGET', RENDERER_TARGET_GENERAL);

$arguments = '';

$cacherequest = false;

if (defined('ALLOW_GET_PARAMETERS')) {

    $arguments = optional_param('args', '', PARAM_RAW);

    $cachekey = optional_param('cachekey', '', PARAM_INT);

    if ($cachekey && $cachekey > 0 && $cachekey <= time()) {

        $cacherequest = true;

    }

}

// Either we are not allowing GET parameters or we didn't use GET because

// we did not pass a cache key or the URL was too long.

if (empty($arguments)) {

    $arguments = file_get_contents('php://input');

}

$requests = json_decode($arguments, true);

if ($requests === null) {

    $lasterror = json_last_error_msg();

    throw new coding_exception('Invalid json in request: ' . $lasterror);

}

$responses = [];

// Defines the external settings required for Ajax processing.

$settings = external_settings::get_instance();

$settings->set_file('pluginfile.php');

$settings->set_fileurl(true);

$settings->set_filter(true);

$settings->set_raw(false);

$haserror = false;

foreach ($requests as $request) {

    $response = [];

    $methodname = clean_param($request['methodname'], PARAM_ALPHANUMEXT);

    $index = clean_param($request['index'], PARAM_INT);

    $args = $request['args'];

    $response = external_api::call_external_function($methodname, $args, true);

    $responses[$index] = $response;

    if ($response['error']) {

        $haserror = true;

        if (!NO_MOODLE_COOKIES) {

            // If there was an error, and this HTTP request includes a Moodle cookie (and therefore a login), reject all

            // subsequent changes.

            //

            // The reason for this is that an earlier step may be performing a dependant action. Consider the following:

            // 1) Backup a thing

            // 2) Reset the thing to its initial state

            // 3) Restore the thing from the backup made in step 1.

            //

            // In the above example you do not want steps 2 and 3 to happen if step 1 fails.

            // Do not process the remaining requests.

            // If the request came through service-nologin.php which does not allow any kind of login,

            // then it is not possible to make changes to the DB, session, site, etc.

            // For all other cases, we *MUST* stop processing subsequent requests.

            break;

        }

    }

}

if ($cacherequest && !$haserror) {

    // 90 days only - based on Moodle point release cadence being every 3 months.

    $lifetime = 60 * 60 * 24 * 90;

    header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');

    header('Pragma: ');

    header('Cache-Control: public, max-age=' . $lifetime . ', immutable');

    header('Accept-Ranges: none');

}

echo json_encode($responses);