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<?php |
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namespace Palmtree\CanonicalUrlBundle\EventListener; |
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use Symfony\Component\HttpFoundation\RedirectResponse; |
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use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent; |
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use Symfony\Component\HttpKernel\Exception\NotFoundHttpException; |
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use Symfony\Component\Routing\Exception\ResourceNotFoundException; |
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use Symfony\Component\Routing\Generator\UrlGeneratorInterface; |
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use Symfony\Component\Routing\RouterInterface; |
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class ExceptionListener |
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{ |
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const CONTROLLER_PATTERN = '~^/app(?:_.+)*\.php~'; |
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/** @var RouterInterface */ |
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private $router; |
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/** @var bool */ |
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private $redirect; |
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/** @var int */ |
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private $redirectCode; |
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/** @var bool */ |
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private $trailingSlash; |
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/** |
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* KernelEventListener constructor. |
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* |
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* @param RouterInterface $router |
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* @param array $config |
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*/ |
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public function __construct(RouterInterface $router, array $config = []) |
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{ |
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$this->router = $router; |
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$this->redirect = $config['redirect']; |
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$this->redirectCode = $config['redirect_code']; |
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$this->trailingSlash = $config['trailing_slash']; |
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} |
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/** |
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* Listener for the 'kernel.exception' event. |
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* |
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* @param GetResponseForExceptionEvent $event |
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* |
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* @return bool |
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*/ |
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public function onKernelException(GetResponseForExceptionEvent $event) |
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{ |
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$exception = $event->getException(); |
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if ($exception instanceof NotFoundHttpException) { |
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// We're about to throw a 404 error, try to resolve it |
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$request = $event->getRequest(); |
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$uri = \strtok($request->getRequestUri(), '?'); |
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// See if there's a matching route without a trailing slash |
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$match = $this->getAlternativeRoute($uri); |
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if ($match !== null) { |
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if ($this->redirect) { |
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$params = $request->query->all(); |
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foreach ($match as $key => $value) { |
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if ($key[0] !== '_') { |
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$params[$key] = $value; |
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} |
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} |
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$url = $this->router->generate($match['_route'], $params, UrlGeneratorInterface::ABSOLUTE_URL); |
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$response = new RedirectResponse($url, $this->redirectCode); |
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$event->setResponse($response); |
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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/** |
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* @param string $uri |
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* |
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* @return array|null |
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*/ |
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private function getAlternativeRoute($uri) |
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{ |
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$alternativeUri = \rtrim($uri, '/'); |
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if ($this->trailingSlash) { |
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$alternativeUri .= '/'; |
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} |
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if ($alternativeUri === $uri) { |
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return null; |
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} |
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$alternativeUri = \preg_replace(static::CONTROLLER_PATTERN, '', $alternativeUri); |
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try { |
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$match = $this->router->match($alternativeUri); |
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return $match; |
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} catch (ResourceNotFoundException $e) { |
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return null; |
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} |
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} |
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} |
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palmtreephp /
canonical-url-bundle
