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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.
*
* This listener works in 2 modes:
*
* * 2.3 compatibility mode where you must call setRequest whenever the Request changes.
* * 2.4+ mode where you must pass a RequestStack instance in the constructor.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class RouterListener implements EventSubscriberInterface
{
private $matcher;
private $context;
private $logger;
private $request;
private $requestStack;
/**
* Constructor.
*
* RequestStack will become required in 3.0.
*
* @param UrlMatcherInterface|RequestMatcherInterface $matcher The Url or Request matcher
* @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, RequestContext $context = null, LoggerInterface $logger = null, RequestStack $requestStack = null)
{
if (!$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;
}
/**
* Sets the current Request.
*
* This method was used to synchronize the Request, but as the HttpKernel
* is doing that automatically now, you should never call it directly.
* It is kept public for BC with the 2.3 version.
*
* @param Request|null $request A Request instance
*
* @deprecated Deprecated since version 2.4, to be moved to a private function in 3.0.
*/
public function setRequest(Request $request = null)
{
if (null !== $request && $this->request !== $request) {
$this->context->fromRequest($request);
}
$this->request = $request;
}
public function onKernelFinishRequest(FinishRequestEvent $event)
{
if (null === $this->requestStack) {
return; // removed when requestStack is required
}
$this->setRequest($this->requestStack->getParentRequest());
}
public function onKernelRequest(GetResponseEvent $event)
{
$request = $event->getRequest();
// initialize the context that is also used by the generator (assuming matcher and generator share the same context instance)
// we call setRequest even if most of the time, it has already been done to keep compatibility
// with frameworks which do not use the Symfony service container
// when we have a RequestStack, no need to do it
if (null !== $this->requestStack) {
$this->setRequest($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(sprintf('Matched route "%s" (parameters: %s)', $parameters['_route'], $this->parametersToString($parameters)));
}
$request->attributes->add($parameters);
unset($parameters['_route']);
unset($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);
}
}
private function parametersToString(array $parameters)
{
$pieces = array();
foreach ($parameters as $key => $val) {
$pieces[] = sprintf('"%s": "%s"', $key, (is_string($val) ? $val : json_encode($val)));
}
return implode(', ', $pieces);
}
public static function getSubscribedEvents()
{
return array(
KernelEvents::REQUEST => array(array('onKernelRequest', 32)),
KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
);
}
}