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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/>. | ||
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/** | ||
* A script to display a ReCaptcha for the site. | ||
* | ||
* ReCaptcha V2 is restricted by domain, so it cannot be displayed in mobile and desktop apps. | ||
* | ||
* This script will display and initialize the reCaptcha, setting some empty callbacks by default. The client can override | ||
* those Javascript callbacks (in the "window" object). | ||
* | ||
* This script won't work in mobile and desktop apps unless $CFG->allowframembedding is enabled. | ||
* | ||
* @package core_webservice | ||
* @copyright 2018 Dani Palou | ||
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
*/ | ||
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define('NO_MOODLE_COOKIES', true); | ||
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require_once(__DIR__ . '/../config.php'); | ||
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$lang = optional_param('lang', '', PARAM_LANG); | ||
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$content = ''; | ||
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// Check that reCAPTCHA is configured. | ||
if (!empty($CFG->recaptchapublickey) && !empty($CFG->recaptchaprivatekey)) { | ||
require_once($CFG->libdir . '/recaptchalib_v2.php'); | ||
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$apiurl = RECAPTCHA_API_URL; | ||
$pubkey = $CFG->recaptchapublickey; | ||
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$jscode = " | ||
// Create empty callbacks by default. They can be overridden by the client. | ||
var recaptchacallback = function() {}; | ||
var recaptchaexpiredcallback = function() {}; | ||
var recaptchaerrorcallback = function() {}; | ||
var recaptchaloaded = function() { | ||
grecaptcha.render('recaptcha_element', { | ||
'sitekey' : '$pubkey', | ||
'callback' : 'recaptchacallback', | ||
'expired-callback' : 'recaptchaexpiredcallback', | ||
'error-callback' : 'recaptchaerrorcallback' | ||
}); | ||
}"; | ||
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$lang = recaptcha_lang($lang); | ||
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$apicode = "\n<script type=\"text/javascript\" "; | ||
$apicode .= "src=\"$apiurl?onload=recaptchaloaded&render=explicit&hl=$lang\" async defer>"; | ||
$apicode .= "</script>\n"; | ||
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$content = html_writer::script($jscode, ''); | ||
$content .= html_writer::div('', 'recaptcha_element', array('id' => 'recaptcha_element')); | ||
$content .= $apicode; | ||
} else { | ||
// To use reCAPTCHA you must have an API key. | ||
require_once($CFG->libdir . '/filelib.php'); | ||
send_header_404(); | ||
print_error('cannotusepage2'); | ||
} | ||
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$output = <<<OET | ||
<html> | ||
<head> | ||
<meta http-equiv="content-type" content="text/html; charset=utf-8" /> | ||
</head> | ||
<body style="margin:0; padding:0"> | ||
$content | ||
</body> | ||
</html> | ||
OET; | ||
echo $output; |