Symfony2 exception event listener run some controller actions

Question

I need to do one of two things (in priority order, but just need one of them).

All of this is to be done inside a function that runs as an Exception Event Listener (http://api.symfony.com/2.2/Symfony/Component/HttpKernel/Event/GetResponseForExceptionEvent.html).

Both below are totally easy inside a normal controller, but I can't see it possible inside an event listener function.

(1) Run a controller as normal and output as normal as though that route had been executed:

e.g. $event->runController('controllerName');

(2) render a template as normal using the same syntax as would inside a normal controller:

return $this->render('Bundle:Default:feedback.html.twig', array([template vars]));

Martin Abraham · Accepted Answer · 2013-11-10 19:19:55Z

take a look at symfony's default exception listener in Symfony\Component\HttpKernel\EventListener\ExceptionListener.

(1) running a controller can be realized this way:

    $request = new \Symfony\Component\HttpFoundation\Request();
    $request->setMethod('GET');
    [..]

    try {
        $response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, true);
    } catch (\Exception $e) {
        return; // pass it to next exception listener this way 
    }

    $event->setResponse($response);

(2) rendering a template in exception listener

all you need to do is pass templating (engine) to the listener inside the service.yml

    services:
      foobar.exception_listener_service:
        class: %foobar.exception_listener_service.class%
        arguments:
          container: "@service_container"
        tags:
          - { name: kernel.event_listener, event: kernel.exception, method: onKernelException, priority: 255 }

inside the listener you can render templates as listed below

    $templating = $this->container->get('templating');
    $response = new Response($templating->render('foobar:Exception:error404.html.twig', array('exception' => $exception)));
    $event->setResponse($response);

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Symfony2 exception event listener run some controller actions

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(1) running a controller can be realized this way:

(2) rendering a template in exception listener

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1 Answer 1

(1) running a controller can be realized this way:

(2) rendering a template in exception listener

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