public static function get_instance($key, $secret)
{
if (self::$instance == null) {
self::$instance = new equella_lti_oauth($key, $secret);
}
return self::$instance;
}
<?php
// This file is part of the EQUELLA module - http://git.io/vUuof
//
// 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/>.
define('AJAX_SCRIPT', true);
require_once dirname(__FILE__) . "/../../config.php";
require_once $CFG->dirroot . '/mod/equella/locallib.php';
$httpbody = file_get_contents("php://input");
if (equella_lti_oauth::verify_message($httpbody)) {
$handler = new equella_lti_grading($httpbody);
$handler->process();
} else {
throw new invalid_parameter_exception('OAuth signature invalid');
}