function OptionsRequestSubscriber::onRequest

Tries to handle the options request.

Parameters

\Symfony\Component\HttpKernel\Event\RequestEvent $event: The request event.

File

core/lib/Drupal/Core/EventSubscriber/OptionsRequestSubscriber.php, line 44

Class

OptionsRequestSubscriber

Handles options requests.

Namespace

Code

public function onRequest(RequestEvent $event) {
  if ($event->getRequest()
    ->isMethod('OPTIONS')) {
    $routes = $this->routeProvider
      ->getRouteCollectionForRequest($event->getRequest());
    // In case we don't have any routes, a 403 should be thrown by the normal
    // request handling.
    if (count($routes) > 0) {
      // Flatten and unique the available methods.
      $methods = array_reduce($routes->all(), function ($methods, Route $route) {
        return array_merge($methods, $route->getMethods());
      }, []);
      $methods = array_unique($methods);
      $response = new Response('', 200, [
        'Allow' => implode(', ', $methods),
      ]);
      $event->setResponse($response);
    }
  }
}