Mercurial > hg > isophonics-drupal-site
view core/lib/Drupal/Core/EventSubscriber/OptionsRequestSubscriber.php @ 17:129ea1e6d783
Update, including to Drupal core 8.6.10
author | Chris Cannam |
---|---|
date | Thu, 28 Feb 2019 13:21:36 +0000 |
parents | 4c8ae668cc8c |
children |
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<?php namespace Drupal\Core\EventSubscriber; use Symfony\Cmf\Component\Routing\RouteProviderInterface; use Symfony\Component\EventDispatcher\EventSubscriberInterface; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\HttpKernel\Event\GetResponseEvent; use Symfony\Component\HttpKernel\KernelEvents; use Symfony\Component\Routing\Route; /** * Handles options requests. * * Therefore it sends a options response using all methods on all possible * routes. */ class OptionsRequestSubscriber implements EventSubscriberInterface { /** * The route provider. * * @var \Symfony\Cmf\Component\Routing\RouteProviderInterface */ protected $routeProvider; /** * Creates a new OptionsRequestSubscriber instance. * * @param \Symfony\Cmf\Component\Routing\RouteProviderInterface $route_provider * The route provider. */ public function __construct(RouteProviderInterface $route_provider) { $this->routeProvider = $route_provider; } /** * Tries to handle the options request. * * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event * The request event. */ public function onRequest(GetResponseEvent $event) { if ($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); } } } /** * {@inheritdoc} */ public static function getSubscribedEvents() { // Set a high priority so it is executed before routing. $events[KernelEvents::REQUEST][] = ['onRequest', 1000]; return $events; } }