/**
  * @param FilterResponseEvent $event
  */
 public function onKernelResponse(FilterResponseEvent $event)
 {
     $response = $event->getResponse();
     if (!$response instanceof WordpressResponse || $event->getRequestType() != HttpKernelInterface::MASTER_REQUEST) {
         return;
     }
     if (!($wp_query = $this->wordpress->getWpQuery())) {
         return;
     }
     if ($wp_query->is_404()) {
         $response->setStatusCode(404);
     }
 }
 /**
  * @param FilterResponseEvent $event
  */
 public function onKernelResponse(FilterResponseEvent $event)
 {
     $response = $event->getResponse();
     if (!$response instanceof WordpressResponse || $event->getRequestType() != HttpKernelInterface::MASTER_REQUEST) {
         return;
     }
     if (!($wp_query = $this->wordpress->getWpQuery())) {
         return;
     }
     $callback = $this->getHttpHeadersCallback();
     $wpHeaders = (array) call_user_func_array($callback, array($event->getRequest()->getUri()));
     foreach ($wpHeaders as $name => $value) {
         // TODO add cache headers support
         if ($name == 'cache-control') {
             //$response->setCache($value);
             continue;
         }
         $response->headers->set($name, $value);
     }
     if ($wp_query->is_404()) {
         $response->setStatusCode(404);
     }
 }