Symfony Profiler

<?php
namespace App\EventSubscriber;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
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\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
use Symfony\Component\Serializer\SerializerInterface;
class ApiExceptionSubscriber implements EventSubscriberInterface
{
private $serializer;
public function __construct(SerializerInterface $serializer)
{
$this->serializer = $serializer;
}
public function onKernelException(ExceptionEvent $event)
{
if ($_ENV['APP_ENV'] == 'prod' && $event->getThrowable() instanceof NotFoundHttpException) {
$response = new RedirectResponse('/');
$event->setResponse($response);
} else {
$json = $this->serializer->serialize($event, 'json');
$resHeaders = ['Content-Type' => 'application/json', 'Access-Control-Allow-Origin' => '*'];
if ($event->getThrowable() instanceof HttpExceptionInterface) {
$code = $event->getThrowable()->getStatusCode();
if ($event->getThrowable() instanceof UnauthorizedHttpException) {
$resHeaders = array_merge($resHeaders, $event->getThrowable()->getHeaders());
}
} else {
$code = Response::HTTP_INTERNAL_SERVER_ERROR;
}
$response = new JsonResponse($json, $code, $resHeaders, true);
$event->setResponse($response);
}
}
public static function getSubscribedEvents()
{
return [
'kernel.exception' => 'onKernelException',
];
}
}

src/EventSubscriber/ApiExceptionSubscriber.php line 24