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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/>.
/**
* An oauth2 redirection endpoint which can be used for an application:
* http://tools.ietf.org/html/draft-ietf-oauth-v2-26#section-3.1.2
*
* This is used because some oauth servers will not allow a redirect urls
* with get params (like repository callback) and that needs to be called
* using the state param.
*
* @package core
* @copyright 2012 Dan Poltawski
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(dirname(__FILE__)).'/config.php');
// The authorization code generated by the authorization server.
$code = required_param('code', PARAM_RAW);
// The state parameter we've given (used in moodle as a redirect url).
$state = required_param('state', PARAM_LOCALURL);
$redirecturl = new moodle_url($state);
$params = $redirecturl->params();
if (isset($params['sesskey']) and confirm_sesskey($params['sesskey'])) {
$redirecturl->param('oauth2code', $code);
redirect($redirecturl);
} else {
print_error('invalidsesskey');
}
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