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<?php
declare(strict_types=1);
namespace Drupal\Core\EventSubscriber;
use Drupal\Core\Routing\RouteMatch;
use Drupal\Core\Url;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
/**
* Handles exceptions related to CSRF access.
*
* Redirects CSRF 403 exceptions to a _csrf_confirm_form_route.
*/
class CsrfExceptionSubscriber extends HttpExceptionSubscriberBase {
/**
* {@inheritdoc}
*/
protected function getHandledFormats(): array {
return ['html'];
}
/**
* Handles a 403 error for HTML.
*
* @param \Symfony\Component\HttpKernel\Event\ExceptionEvent $event
* The event to process.
*/
public function on403(ExceptionEvent $event): void {
$request = $event->getRequest();
$routeMatch = RouteMatch::createFromRequest($request);
$route = $routeMatch->getRouteObject();
if (!$route->hasRequirement('_csrf_token') || empty($route->getOption('_csrf_confirm_form_route'))) {
return;
}
$event->setResponse(new RedirectResponse(Url::fromRoute($route->getOption('_csrf_confirm_form_route'))->toString()));
}
}
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