Current File : /var/www/projetos/suporte.iigd.com.br/src/Toolbox/URL.php
<?php
/**
* ---------------------------------------------------------------------
*
* GLPI - Gestionnaire Libre de Parc Informatique
*
* http://glpi-project.org
*
* @copyright 2015-2024 Teclib' and contributors.
* @copyright 2003-2014 by the INDEPNET Development Team.
* @licence https://www.gnu.org/licenses/gpl-3.0.html
*
* ---------------------------------------------------------------------
*
* LICENSE
*
* This file is part of GLPI.
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*
* ---------------------------------------------------------------------
*/
namespace Glpi\Toolbox;
final class URL
{
/**
* Sanitize URL to prevent XSS.
* /!\ This method only ensure that links are corresponding to a valid URL
* (i.e. an absolute URL with a scheme or something that correspond to a path).
* To be sure that no XSS is possible, value have to be HTML encoded when it is printed in a HTML page.
*
* @param null|string $url
*
* @return string
*/
final public static function sanitizeURL(?string $url): string
{
if ($url === null) {
return '';
}
$url = trim($url);
$url_begin_patterns = [
// scheme followed by `//` and a hostname (absolute URL)
'[a-z]+:\/\/.+',
// `/` that corresponds to either start of a network path (e.g. `//host/path/to/file`)
// or a relative URL (e.g. `/`, `/path/to/page`, or `//anothersite.org/`)
'\/',
];
$url_pattern = '/^(' . implode('|', $url_begin_patterns) . ')/i';
if (preg_match($url_pattern, $url) !== 1) {
return '';
}
$js_pattern = '/^javascript:/i';
if (preg_match($js_pattern, $url)) {
return '';
}
return $url;
}
}
Mini Shell