git commit -m Issue

core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php

@@ -98,10 +98,18 @@ class FinishResponseSubscriber implements EventSubscriberInterface {
 
     // Attach globally-declared headers to the response object so that Symfony
     // can send them for us correctly.
-    // @todo remove this once we have removed all _drupal_add_http_header()
-    //   calls.
+    // @todo Remove this once drupal_process_attached() no longer calls
+    //    _drupal_add_http_header(), which has its own static. Instead,
+    //    _drupal_process_attached() should use
+    //    \Symfony\Component\HttpFoundation\Response->headers->set(), which is
+    //    already documented on the (deprecated) _drupal_process_attached() to
+    //    become the final, intended mechanism.
     $headers = drupal_get_http_header();
     foreach ($headers as $name => $value) {
+      // Symfony special-cases the 'Status' header.
+      if ($name === 'status') {
+        $response->setStatusCode($value);
+      }
       $response->headers->set($name, $value, FALSE);
     }
 

core/modules/views/src/EventSubscriber/RouteSubscriber.php

@@ -7,7 +7,6 @@
 
 namespace Drupal\views\EventSubscriber;
 
-use Drupal\Core\Page\HtmlPage;
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\Core\State\StateInterface;
 use Drupal\Core\Routing\RouteSubscriberBase;
@@ -26,7 +25,6 @@ use Symfony\Component\HttpKernel\KernelEvents;
  * routes are overridden by views. This information is used to determine which
  * views have to be added by views in the dynamic event.
  *
- * Additional to adding routes it also changes the htmlpage response code.
  *
  * @see \Drupal\views\Plugin\views\display\PathPluginBase
  */
@@ -85,7 +83,6 @@ class RouteSubscriber extends RouteSubscriberBase {
    */
   public static function getSubscribedEvents() {
     $events = parent::getSubscribedEvents();
-    $events[KernelEvents::VIEW][] = array('onHtmlPage', 75);
     $events[RoutingEvents::FINISHED] = array('routeRebuildFinished');
     // Ensure to run after the entity resolver subscriber
     // @see \Drupal\Core\EventSubscriber\EntityRouteAlterSubscriber
@@ -113,23 +110,6 @@ class RouteSubscriber extends RouteSubscriberBase {
     return $this->viewsDisplayPairs;
   }
 
-  /**
-   * Sets the proper response code coming from the http status area handler.
-   *
-   * @param \Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent $event
-   *   The Event to process.
-   *
-   * @see \Drupal\views\Plugin\views\area\HTTPStatusCode
-   */
-  public function onHtmlPage(GetResponseForControllerResultEvent $event) {
-    $page = $event->getControllerResult();
-    if ($page instanceof HtmlPage) {
-      if (($request = $event->getRequest()) && $request->attributes->has('view_id')) {
-        $page->setStatusCode($request->attributes->get('_http_statuscode', 200));
-      };
-    }
-  }
-
   /**
    * Returns a set of route objects.
    *

core/modules/views/src/Plugin/views/area/HTTPStatusCode.php

@@ -64,8 +64,8 @@ class HTTPStatusCode extends AreaPluginBase {
    */
   function render($empty = FALSE) {
     if (!$empty || !empty($this->options['empty'])) {
-      $this->view->getResponse()->setStatusCode($this->options['status_code']);
-      $this->view->getRequest()->attributes->set('_http_statuscode', $this->options['status_code']);
+      $build['#attached']['http_header'][] = ['Status', $this->options['status_code']];
+      return $build;
     }
   }