Symfony: Interception des exceptions

ExceptionEventListener.php

<?php

// My/CoreBundle/EventListener/ExceptionEventListener.php

namespace My\CoreBundle\EventListener;

use Symfony\Bundle\FrameworkBundle\Routing\Router,
    Symfony\Bundle\FrameworkBundle\Translation\Translator,
    Symfony\Component\HttpFoundation\Session\Session,
    Symfony\Component\HttpFoundation\Request,
    Symfony\Component\HttpFoundation\RedirectResponse,
    Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;

use Twig_Environment as TwigEnvironment;

class ExceptionEventListener {

    protected $router;
    protected $twig;
    protected $session;
    protected $mailer;
    protected $fromEmail;
    protected $fromName;
    protected $to;

    public function __construct(Router $router, TwigEnvironment $twig, Session $session, Translator $translator, \Swift_Mailer $mailer, $fromEmail, $fromName, array $to) {
        $this->router = $router;
        $this->twig = $twig;
        $this->session = $session;
        $this->translator = $translator;
        $this->mailer = $mailer;
        $this->fromEmail = $fromEmail;
        $this->fromName = $fromName;
        $this->to = $to;
    }

    public function onKernelException(GetResponseForExceptionEvent $event) {

        # On récupère l'exception
        $exception = $event->getException();

        # La requête HTTP
        $request = $event->getRequest();

        # Le client associé au sous-domaine courant
        $garage = $request->attributes->get('client');
        
        $subject = "Une exception s'est produite";
        
        $msgbody = $this->twig->render('MyCoreBundle:Mail/Exception:generic.html.twig', array(
          'exception' => $exception,
          'request' => $request,
        ));

        # 1. On informe les administrateurs du problème
        $message = \Swift_Message::newInstance()
            ->setSubject($subject)
            ->setFrom(array($this->fromEmail => $this->fromName))
            ->setTo($this->to)
            ->setBody($msgbody, 'text/html');
        
        $this->mailer->send($message);

        # 2. On redirige l'utilisateur vers la page d'erreur 500 de l'application
        $redirectUri = $this->router->generate('route_erreur500');
        $event->setResponse(new RedirectResponse($redirectUri));
    }
}

generic.html.twig

{# My/CoreBundle/Resources/views/Mail/Exception/generic.html.twig #}

{% if request.attributes.get('client') is defined %}
<h1>Une erreur s'est produite sur la plateforme du client "{{ request.attributes.get('client').name }}"</h1>
{% else %}
<h1>Une erreur s'est produite</h1>
{% endif %}

<h2>Informations</h2>
<p style="color: red;"><strong>Exception:</strong> {{ exception.message }}</p>
<p><strong>Horodatage:</strong> {{ 'now'|date('d/m/Y à H:i:s') }}</p>
<p><strong>URL:</strong> {{ request.scheme ~ '://' ~ request.httpHost ~ request.basePath ~ request.pathInfo }}</p>
<p><strong>IP utilisateur:</strong> {{ request.clientIp }}</p>

<h2>Pile d'appel</h2>
<pre>{{ exception.traceAsString }}</pre>

services.yml

# My/CoreBundle/Resources/config/services.yml

services:
    netgusto.listener.exception:
        class: My\CoreBundle\EventListener\ExceptionEventListener
        arguments:
            router: @router
            twig: @twig
            session: @session
            translator: @translator
            mailer: @mailer
            fromEmail: [email protected]
            fromName: E-Space
            to:
                - [email protected]
                - [email protected]
        tags:
            - { name: kernel.event_listener, event: kernel.exception, method: onKernelException }