BUGFIX: fixed error pages

config/services.yaml

@@ -19,6 +19,9 @@ services:
             - '../src/DependencyInjection/'
             - '../src/Entity/'
             - '../src/Kernel.php'
+    App\EventListener\ExceptionListener:
+        tags:
+            - { name: kernel.event_listener, event: kernel.exception }
 
     # add more service definitions when explicit configuration is needed
     # please note that last definitions always *replace* previous ones

src/Controller/DefaultController.php

@@ -4,8 +4,6 @@ namespace App\Controller;
 
 use App\Repository\Page;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
-use Symfony\Component\HttpFoundation\JsonResponse;
-use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\KernelInterface;

src/EventListener/ExceptionListener.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\EventListener;
+
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Event\ExceptionEvent;
+use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class ExceptionListener
+{
+    public function __construct(UrlGeneratorInterface $router)
+    {
+        $this->router = $router;
+    }
+
+    public function onKernelException(ExceptionEvent $event)
+    {
+        // You get the exception object from the received event
+        $exception = $event->getThrowable();
+
+        // HttpExceptionInterface is a special type of exception that
+        // holds status code and header details
+        if ($exception instanceof HttpExceptionInterface) {
+            $route = $this->router->generate('error', ['status' => $exception->getStatusCode()]);
+        } else {
+            $route = $this->router->generate('error', ['status' => Response::HTTP_INTERNAL_SERVER_ERROR]);
+        }
+
+        // Customize your response object to display the exception details
+        $response = new RedirectResponse($route);
+
+        // sends the modified response object to the event
+        $event->setResponse($response);
+    }
+}