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- 06.01.2017
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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\Debug\Exception\FlattenException;
016 use Symfony\Component\HttpFoundation\Request;
017 use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
018 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
019 use Symfony\Component\HttpKernel\KernelEvents;
020 use Symfony\Component\HttpKernel\HttpKernelInterface;
021 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
022 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
023
024 /**
025 * ExceptionListener.
026 *
027 * @author Fabien Potencier <fabien@symfony.com>
028 */
029 class ExceptionListener implements EventSubscriberInterface
030 {
031 protected $controller;
032 protected $logger;
033
034 public function __construct($controller, LoggerInterface $logger = null)
035 {
036 $this->controller = $controller;
037 $this->logger = $logger;
038 }
039
040 public function onKernelException(GetResponseForExceptionEvent $event)
041 {
042 $exception = $event->getException();
043 $request = $event->getRequest();
044
045 $this->logException($exception, sprintf('Uncaught PHP Exception %s: "%s" at %s line %s', get_class($exception), $exception->getMessage(), $exception->getFile(), $exception->getLine()));
046
047 $request = $this->duplicateRequest($exception, $request);
048
049 try {
050 $response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, false);
051 } catch (\Exception $e) {
052 $this->logException($e, sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', get_class($e), $e->getMessage(), $e->getFile(), $e->getLine()));
053
054 $wrapper = $e;
055
056 while ($prev = $wrapper->getPrevious()) {
057 if ($exception === $wrapper = $prev) {
058 throw $e;
059 }
060 }
061
062 $prev = new \ReflectionProperty('Exception', 'previous');
063 $prev->setAccessible(true);
064 $prev->setValue($wrapper, $exception);
065
066 throw $e;
067 }
068
069 $event->setResponse($response);
070 }
071
072 public static function getSubscribedEvents()
073 {
074 return array(
075 KernelEvents::EXCEPTION => array('onKernelException', -128),
076 );
077 }
078
079 /**
080 * Logs an exception.
081 *
082 * @param \Exception $exception The \Exception instance
083 * @param string $message The error message to log
084 */
085 protected function logException(\Exception $exception, $message)
086 {
087 if (null !== $this->logger) {
088 if (!$exception instanceof HttpExceptionInterface || $exception->getStatusCode() >= 500) {
089 $this->logger->critical($message, array('exception' => $exception));
090 } else {
091 $this->logger->error($message, array('exception' => $exception));
092 }
093 }
094 }
095
096 /**
097 * Clones the request for the exception.
098 *
099 * @param \Exception $exception The thrown exception
100 * @param Request $request The original request
101 *
102 * @return Request $request The cloned request
103 */
104 protected function duplicateRequest(\Exception $exception, Request $request)
105 {
106 $attributes = array(
107 '_controller' => $this->controller,
108 'exception' => FlattenException::create($exception),
109 'logger' => $this->logger instanceof DebugLoggerInterface ? $this->logger : null,
110 // keep for BC -- as $format can be an argument of the controller callable
111 // see src/Symfony/Bundle/TwigBundle/Controller/ExceptionController.php
112 // @deprecated since version 2.4, to be removed in 3.0
113 'format' => $request->getRequestFormat(),
114 );
115 $request = $request->duplicate(null, null, $attributes);
116 $request->setMethod('GET');
117
118 return $request;
119 }
120 }
121