从内核事件侦听器返回响应

Question

I'm using the OAuth2 Server Bundle and I want to authenticate the user for all methods in my controller. It's very similar to the use case done in the documentation How to Setup before and after Filters , except that I want to return the response instead of throwing an exception.

onKernelController with FilterControllerEvent gives me access to the controller so I can access OAuth2 Server Bundle's response method. But I can't return any response in there. I can return a response in onKernelController using GetResponseEvent , but it gets called before onKernelController .

I looked into kernel.exception too but getResponse() returns different error messages so I rather not just throw an ambiguous exception.

What's the best practice for what I am trying to accomplish?

This is my code:

public function onKernelController(FilterControllerEvent $event)
{
    $controller = $event->getController();

    if ($controller[0] instanceof \Foo\Bundle\AuthBundle\Controller\TokenAuthenticatedController) {

        $server = $controller[0]->get('oauth2.server');
        $request = $controller[0]->get('oauth2.request');
        $response = $controller[0]->get('oauth2.response');

        if (!$server->verifyResourceRequest($request, $response)) {
            return $server->getResponse();
        }
    }
}

public function onKernelRequest(GetResponseEvent $event)
{
    $event->setResponse(new Response('Some response', 501));
}

Answer 1

In the EventListener Approach you can't return a response but you must set it on the event itself.

The problem is that the Event FilterControllerEvent can't manage a returned response, so a better approach is to manage(listen for) the GetResponseForControllerResultEvent where you can set a response and stop the propagation.

Hope this help.