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<?php
/**
* webtrees: online genealogy
* 'Copyright (C) 2023 webtrees development team
* 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/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\Http\Middleware;
use Fig\Http\Message\RequestMethodInterface;
use Fisharebest\Webtrees\FlashMessages;
use Fisharebest\Webtrees\Http\RequestHandlers\Logout;
use Fisharebest\Webtrees\Http\RequestHandlers\SelectLanguage;
use Fisharebest\Webtrees\Http\RequestHandlers\SelectTheme;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Session;
use Fisharebest\Webtrees\Validator;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use function in_array;
/**
* Middleware to wrap a request in a transaction.
*/
class CheckCsrf implements MiddlewareInterface
{
private const EXCLUDE_ROUTES = [
Logout::class,
SelectLanguage::class,
SelectTheme::class,
];
/**
* @param ServerRequestInterface $request
* @param RequestHandlerInterface $handler
*
* @return ResponseInterface
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
if ($request->getMethod() === RequestMethodInterface::METHOD_POST) {
$route = Validator::attributes($request)->route();
if (!in_array($route->name, self::EXCLUDE_ROUTES, true)) {
$params = (array) $request->getParsedBody();
$client_token = $params['_csrf'] ?? $request->getHeaderLine('X-CSRF-TOKEN');
$session_token = Session::get('CSRF_TOKEN');
unset($params['_csrf']);
$request = $request->withParsedBody($params);
if ($client_token !== $session_token) {
if ($client_token === '') {
FlashMessages::addMessage(I18N::translate('The form data is incomplete. Perhaps you need to increase max_input_vars on your server?'));
} else {
FlashMessages::addMessage(I18N::translate('This form has expired. Try again.'));
}
return redirect((string) $request->getUri());
}
}
}
return $handler->handle($request);
}
}
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