Intercepting controller response to add more headers with an event listener in symfony

namespace Application\ServerBundle\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * @Route("api", service="application_server.controller.api")
 */
class ApiController extends Controller
{
    /**
     * @param Request $request
     *
     * @Method({"POST"})
     * @Route("")
     *
     * @return Response
     */
    public function indexAction(Request $request)
    {
        .....

        return new Response(...);
    }
}

services:
    application_server.controller.api:
        class: Application\ServerBundle\Controller\ApiController

* HTTP/1.1 200 OK
* Date: Thu, 05 Jan 2017 16:27:21 GMT
* Server Apache/2.4.12 (Ubuntu) is not blacklisted
* Server: Apache/2.4.12 (Ubuntu)
* Vary: Authorization
* Cache-Control: no-cache
* X-Debug-Token: f0bb9d
* X-Debug-Token-Link: http://api.dev/app_dev.php/_profiler/f0bb9d
* Content-Length: 35
* Content-Type: text/html; charset=UTF-8

namespace Application\ServerBundle\EventListener;

use Symfony\Component\HttpKernel\Event\FilterResponseEvent;

class ResponseInterceptorListener
{
    public function onKernelResponse(FilterResponseEvent $event)
    {
        // You can do more check here such as:
        // Is it master request?
        // Is it a specific controller?
        // Is it a authenticated user?
        // So on.

        $response = $event->getResponse();
        $response->headers->set('My-Hello-Message', 'Hello Inanzzz');
    }
}

services:
    application_server.listener.response_interceptor:
        class: Application\ServerBundle\EventListener\ResponseInterceptorListener
        tags:
            - { name: kernel.event_listener, event: kernel.response, method: onKernelResponse }

* HTTP/1.1 200 OK
* Date: Thu, 05 Jan 2017 16:29:11 GMT
* Server Apache/2.4.12 (Ubuntu) is not blacklisted
* Server: Apache/2.4.12 (Ubuntu)
* Vary: Authorization
* Cache-Control: no-cache
* My-Hello-Message: Hello Inanzzz
* X-Debug-Token: f0bb9d
* X-Debug-Token-Link: http://api.dev/app_dev.php/_profiler/f0bb9d
* Content-Length: 35
* Content-Type: text/html; charset=UTF-8