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<?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\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Routing\Exception\MethodNotAllowedException;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
use Symfony\Component\Routing\Matcher\RequestMatcherInterface;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\RequestContextAwareInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Request;
/**
* Initializes the context from the request and sets request attributes based on a matching route.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class RouterListener implements EventSubscriberInterface
{
private $matcher;
private $context;
private $logger;
private $requestStack;
/**
* Constructor.
*
* @param UrlMatcherInterface|RequestMatcherInterface $matcher The Url or Request matcher
* @param RequestStack $requestStack A RequestStack instance
* @param RequestContext|null $context The RequestContext (can be null when $matcher implements RequestContextAwareInterface)
* @param LoggerInterface|null $logger The logger
*
* @throws \InvalidArgumentException
*/
public function __construct($matcher, RequestStack $requestStack, RequestContext $context = null, LoggerInterface $logger = null)
{
if (!$matcher instanceof UrlMatcherInterface && !$matcher instanceof RequestMatcherInterface) {
throw new \InvalidArgumentException('Matcher must either implement UrlMatcherInterface or RequestMatcherInterface.');
}
if (null === $context && !$matcher instanceof RequestContextAwareInterface) {
throw new \InvalidArgumentException('You must either pass a RequestContext or the matcher must implement RequestContextAwareInterface.');
}
$this->matcher = $matcher;
$this->context = $context ?: $matcher->getContext();
$this->requestStack = $requestStack;
$this->logger = $logger;
}
private function setCurrentRequest(Request $request = null)
{
if (null !== $request) {
$this->context->fromRequest($request);
}
}
/**
* After a sub-request is done, we need to reset the routing context to the parent request so that the URL generator
* operates on the correct context again.
*
* @param FinishRequestEvent $event
*/
public function onKernelFinishRequest(FinishRequestEvent $event)
{
$this->setCurrentRequest($this->requestStack->getParentRequest());
}
public function onKernelRequest(GetResponseEvent $event)
{
$request = $event->getRequest();
$this->setCurrentRequest($request);
if ($request->attributes->has('_controller')) {
// routing is already done
return;
}
// add attributes based on the request (routing)
try {
// matching a request is more powerful than matching a URL path + context, so try that first
if ($this->matcher instanceof RequestMatcherInterface) {
$parameters = $this->matcher->matchRequest($request);
} else {
$parameters = $this->matcher->match($request->getPathInfo());
}
if (null !== $this->logger) {
$this->logger->info('Matched route "{route}".', array(
'route' => isset($parameters['_route']) ? $parameters['_route'] : 'n/a',
'route_parameters' => $parameters,
'request_uri' => $request->getUri(),
'method' => $request->getMethod(),
));
}
$request->attributes->add($parameters);
unset($parameters['_route'], $parameters['_controller']);
$request->attributes->set('_route_params', $parameters);
} catch (ResourceNotFoundException $e) {
$message = sprintf('No route found for "%s %s"', $request->getMethod(), $request->getPathInfo());
if ($referer = $request->headers->get('referer')) {
$message .= sprintf(' (from "%s")', $referer);
}
throw new NotFoundHttpException($message, $e);
} catch (MethodNotAllowedException $e) {
$message = sprintf('No route found for "%s %s": Method Not Allowed (Allow: %s)', $request->getMethod(), $request->getPathInfo(), implode(', ', $e->getAllowedMethods()));
throw new MethodNotAllowedHttpException($e->getAllowedMethods(), $message, $e);
}
}
public static function getSubscribedEvents()
{
return array(
KernelEvents::REQUEST => array(array('onKernelRequest', 32)),
KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
);
}
}