Custom error pages for PROD environment only? - symfony

Question

How can I setup custom error pages for PROD environment only? I want to show custom ones for production but ordinary ones with exceptions for dev environment.
Any ideas?

Answer 1

I had the same issue and solution was pretty easy. You have to modify parameter twig.exception_listener.contoller to redirect rendering of error page to your own controller, which may extend original Twig exception controller.
Example (YourBundle/Resources/config/services.xml):
<parameter key="twig.exception_listener.controller">YourBundle\Controller\ExceptionController::showAction</parameter>
Then you have to create your own ExceptionController with method showAction, check for environment and do what you want to do or pass request to parent::showAction().
namespace YourBundle\Controller;
use Symfony\Bundle\TwigBundle\Controller\ExceptionController as BaseExceptionController;
use Symfony\Bundle\FrameworkBundle\Templating\TemplateReference;
use Symfony\Component\HttpKernel\Exception\FlattenException;
use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
use Symfony\Component\HttpFoundation\Response;
class ExceptionController extends BaseExceptionController {
public function showAction(FlattenException $exception, DebugLoggerInterface $logger = null, $format = 'html') {
$kernel = $this->container->get('kernel');
if ($kernel->getEnvironment() == 'prod') {
$request = $this->container->get('request');
$request->setRequestFormat($format);
$templating = $this->container->get('templating');
$code = $exception->getStatusCode();
$template = new TemplateReference('YourBundle', 'Exception', 'errorpage', $format, 'twig');
if ($templating->exists($template)) {
$response = $templating->renderResponse($template, array(
'status_code' => $code,
'message_code' => 'error_' . $code,
'status_text' => Response::$statusTexts[$code],
'requested_url' => $request->getUri(),
));
$response->setStatusCode($code);
$response->headers->replace($exception->getHeaders());
return $response;
}
}
return parent::showAction($exception, $logger, $format);
}
}
Beware of errors in errorpage.html.twig, because exceptions in twig processing are not handled as usual.

Answer 2

If you don't want to override the exception controller :
You can first copy the entire folder (or specific layout file) at
\vendor\symfony\symfony\src\Symfony\Bundle\TwigBundle\Resources\views\
to
\app\Resources\TwigBundle\views
Then customise the view in each layout file to match your design.
Then in the layout file, customise the message for each environment as follow
{% if app.environment == 'prod' %}
// message for prod
{% else %}
// message for dev
{% endif %}