Symfony Profiler

<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\EventListener;
use Psr\Log\LoggerInterface;
use Symfony\Component\Debug\Exception\FlattenException;
use Symfony\Component\Debug\ExceptionHandler;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
/**
* @author Fabien Potencier <fabien@symfony.com>
*
* @final since Symfony 4.3
*/
class ExceptionListener implements EventSubscriberInterface
{
protected $controller;
protected $logger;
protected $debug;
private $charset;
private $fileLinkFormat;
private $isTerminating = false;
public function __construct($controller, LoggerInterface $logger = null, $debug = false, string $charset = null, $fileLinkFormat = null)
{
$this->controller = $controller;
$this->logger = $logger;
$this->debug = $debug;
$this->charset = $charset;
$this->fileLinkFormat = $fileLinkFormat;
}
public function logKernelException(GetResponseForExceptionEvent $event)
{
$e = FlattenException::create($event->getException());
$this->logException($event->getException(), sprintf('Uncaught PHP Exception %s: "%s" at %s line %s', $e->getClass(), $e->getMessage(), $e->getFile(), $e->getLine()));
}
/**
* @param string $eventName
* @param EventDispatcherInterface $eventDispatcher
*/
public function onKernelException(GetResponseForExceptionEvent $event)
{
if (null === $this->controller) {
if (!$event->isMasterRequest()) {
return;
}
if (!$this->isTerminating) {
$this->isTerminating = true;
return;
}
$this->isTerminating = false;
}
$exception = $event->getException();
$request = $this->duplicateRequest($exception, $event->getRequest());
$eventDispatcher = \func_num_args() > 2 ? func_get_arg(2) : null;
try {
$response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, false);
} catch (\Exception $e) {
$f = FlattenException::create($e);
$this->logException($e, sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', $f->getClass(), $f->getMessage(), $e->getFile(), $e->getLine()));
$prev = $e;
do {
if ($exception === $wrapper = $prev) {
throw $e;
}
} while ($prev = $wrapper->getPrevious());
$prev = new \ReflectionProperty($wrapper instanceof \Exception ? \Exception::class : \Error::class, 'previous');
$prev->setAccessible(true);
$prev->setValue($wrapper, $exception);
throw $e;
}
$event->setResponse($response);
if ($this->debug && $eventDispatcher instanceof EventDispatcherInterface) {
$cspRemovalListener = function ($event) use (&$cspRemovalListener, $eventDispatcher) {
$event->getResponse()->headers->remove('Content-Security-Policy');
$eventDispatcher->removeListener(KernelEvents::RESPONSE, $cspRemovalListener);
};
$eventDispatcher->addListener(KernelEvents::RESPONSE, $cspRemovalListener, -128);
}
}
public function reset()
{
$this->isTerminating = false;
}
public static function getSubscribedEvents()
{
return [
KernelEvents::EXCEPTION => [
['logKernelException', 0],
['onKernelException', -128],
],
];
}
/**
* Logs an exception.
*
* @param \Exception $exception The \Exception instance
* @param string $message The error message to log
*/
protected function logException(\Exception $exception, $message)
{
if (null !== $this->logger) {
if (!$exception instanceof HttpExceptionInterface || $exception->getStatusCode() >= 500) {
$this->logger->critical($message, ['exception' => $exception]);
} else {
$this->logger->error($message, ['exception' => $exception]);
}
}
}
/**
* Clones the request for the exception.
*
* @param \Exception $exception The thrown exception
* @param Request $request The original request
*
* @return Request The cloned request
*/
protected function duplicateRequest(\Exception $exception, Request $request)
{
$attributes = [
'exception' => $exception = FlattenException::create($exception),
'_controller' => $this->controller ?: function () use ($exception) {
$handler = new ExceptionHandler($this->debug, $this->charset, $this->fileLinkFormat);
return new Response($handler->getHtml($exception), $exception->getStatusCode(), $exception->getHeaders());
},
'logger' => $this->logger instanceof DebugLoggerInterface ? $this->logger : null,
];
$request = $request->duplicate(null, null, $attributes);
$request->setMethod('GET');
return $request;
}
}

vendor/symfony/http-kernel/EventListener/ExceptionListener.php line 79