diff core/lib/Drupal/Core/EventSubscriber/OptionsRequestSubscriber.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/EventSubscriber/OptionsRequestSubscriber.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,69 @@
+<?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) {
+        $methods = array_map(function (Route $route) {
+          return $route->getMethods();
+        }, $routes->all());
+        // Flatten and unique the available methods.
+        $methods = array_unique(call_user_func_array('array_merge', $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;
+  }
+
+}