symfony/src/Symfony/Bundle/FrameworkBundle/Controller/ExceptionController.php

<?php

namespace Symfony\Bundle\FrameworkBundle\Controller;

use Symfony\Component\DependencyInjection\ContainerAware;
use Symfony\Component\HttpKernel\Exception\FlattenException;
use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;

/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

/**
 * ExceptionController.
 *
 * @author Fabien Potencier <fabien.potencier@symfony-project.com>
 */
class ExceptionController extends ContainerAware
{
    /**
     * Converts an Exception to a Response.
     *
     * @param FlattenException     $exception A FlattenException instance
     * @param DebugLoggerInterface $logger    A DebugLoggerInterface instance
     * @param string               $format    The format to use for rendering (html, xml, ...)
     *
     * @throws \InvalidArgumentException When the exception template does not exist
     */
    public function exceptionAction(FlattenException $exception, DebugLoggerInterface $logger = null, $format = 'html')
    {
        $this->container->get('request')->setRequestFormat($format);

        $currentContent = '';
        while (false !== $content = @ob_get_clean()) {
            $currentContent .= $content;
        }

        if ('Symfony\Component\Security\Exception\AccessDeniedException' === $exception->getClass()) {
            $exception->setStatusCode($exception->getCode());
        }

        $template = $this->container->get('kernel')->isDebug() ? 'exception' : 'error';
        if ($this->container->get('kernel')->isDebug() && 'html' == $format) {
            $template = 'exception_full';
        }
        $template = 'FrameworkBundle:Exception:'.$template.'.twig';

        $templating = $this->container->get('templating');
        if (!$templating->exists($template)) {
            $this->container->get('request')->setRequestFormat('html');
        }

        $response = $templating->renderResponse(
            $template,
            array(
                'exception'      => $exception,
                'logger'         => $logger,
                'currentContent' => $currentContent,
            )
        );

        $response->setStatusCode($exception->getStatusCode());

        return $response;
    }
}