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- 27.10.2014
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ExceptionListener.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\HttpKernel\EventListener;
013
014 use Psr\Log\LoggerInterface;
015 use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
016 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
017 use Symfony\Component\HttpKernel\KernelEvents;
018 use Symfony\Component\HttpKernel\HttpKernelInterface;
019 use Symfony\Component\HttpKernel\Exception\FlattenException;
020 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
021 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
022
023 /**
024 * ExceptionListener.
025 *
026 * @author Fabien Potencier <fabien@symfony.com>
027 */
028 class ExceptionListener implements EventSubscriberInterface
029 {
030 protected $controller;
031 protected $logger;
032
033 public function __construct($controller, LoggerInterface $logger = null)
034 {
035 $this->controller = $controller;
036 $this->logger = $logger;
037 }
038
039 public function onKernelException(GetResponseForExceptionEvent $event)
040 {
041 static $handling;
042
043 if (true === $handling) {
044 return false;
045 }
046
047 $handling = true;
048
049 $exception = $event->getException();
050 $request = $event->getRequest();
051
052 $this->logException($exception, sprintf('Uncaught PHP Exception %s: "%s" at %s line %s', get_class($exception), $exception->getMessage(), $exception->getFile(), $exception->getLine()));
053
054 $attributes = array(
055 '_controller' => $this->controller,
056 'exception' => FlattenException::create($exception),
057 'logger' => $this->logger instanceof DebugLoggerInterface ? $this->logger : null,
058 // keep for BC -- as $format can be an argument of the controller callable
059 // see src/Symfony/Bundle/TwigBundle/Controller/ExceptionController.php
060 // @deprecated in 2.4, to be removed in 3.0
061 'format' => $request->getRequestFormat(),
062 );
063
064 $request = $request->duplicate(null, null, $attributes);
065 $request->setMethod('GET');
066
067 try {
068 $response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, true);
069 } catch (\Exception $e) {
070 $this->logException($exception, sprintf('Exception thrown when handling an exception (%s: %s)', get_class($e), $e->getMessage()), false);
071
072 // set handling to false otherwise it wont be able to handle further more
073 $handling = false;
074
075 // re-throw the exception from within HttpKernel as this is a catch-all
076 return;
077 }
078
079 $event->setResponse($response);
080
081 $handling = false;
082 }
083
084 public static function getSubscribedEvents()
085 {
086 return array(
087 KernelEvents::EXCEPTION => array('onKernelException', -128),
088 );
089 }
090
091 /**
092 * Logs an exception.
093 *
094 * @param \Exception $exception The original \Exception instance
095 * @param string $message The error message to log
096 * @param bool $original False when the handling of the exception thrown another exception
097 */
098 protected function logException(\Exception $exception, $message, $original = true)
099 {
100 $isCritical = !$exception instanceof HttpExceptionInterface || $exception->getStatusCode() >= 500;
101 $context = array('exception' => $exception);
102 if (null !== $this->logger) {
103 if ($isCritical) {
104 $this->logger->critical($message, $context);
105 } else {
106 $this->logger->error($message, $context);
107 }
108 } elseif (!$original || $isCritical) {
109 error_log($message);
110 }
111 }
112 }
113