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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| <?php | ||
| namespace Vanio\ApiBundle\Request; | ||
|
|
||
| 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\FilterResponseEvent; | ||
| use Symfony\Component\HttpKernel\Event\GetResponseEvent; | ||
| use Symfony\Component\HttpKernel\KernelEvents; | ||
| use Vanio\Stdlib\Strings; | ||
| use Vanio\Stdlib\Uri; | ||
|
|
||
| class CorsListener implements EventSubscriberInterface | ||
| { | ||
| private const SIMPLE_HEADERS = ['accept', 'accept-language', 'content-language', 'origin']; | ||
| private const METHODS = ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS', 'HEAD', 'CONNECT', 'TRACE']; | ||
|
|
||
| /** @var string[]|bool */ | ||
| private $allowedOrigins; | ||
|
|
||
| /** @var string[]|bool */ | ||
| private $allowedMethods; | ||
|
|
||
| /** @var string[]|bool */ | ||
| private $allowedHeaders; | ||
|
|
||
| /** @var string[]|bool */ | ||
| private $exposedHeaders; | ||
|
|
||
| /** @var bool */ | ||
| private $areCredentialsAllowed; | ||
|
|
||
| /** @var int|null */ | ||
| private $maximumAge; | ||
|
|
||
| /** | ||
| * @param string[]|bool $allowedOrigins | ||
| * @param string[]|bool $allowedMethods | ||
| * @param string[]|bool $allowedHeaders | ||
| * @param string[]|bool $exposedHeaders | ||
| * @param bool $areCredentialsAllowed | ||
| */ | ||
| public function __construct( | ||
| $allowedOrigins = [], | ||
| $allowedMethods = true, | ||
| $allowedHeaders = true, | ||
| $exposedHeaders = true, | ||
| bool $areCredentialsAllowed = true, | ||
| ?int $maximumAge = null | ||
| ) { | ||
| $this->allowedOrigins = $allowedOrigins; | ||
| $this->allowedMethods = $this->allowedMethods === true | ||
| ? array_map('strtoupper', $allowedMethods) | ||
| : self::METHODS; | ||
| $this->allowedHeaders = $allowedHeaders; | ||
| $this->areCredentialsAllowed = $areCredentialsAllowed; | ||
| $this->maximumAge = $maximumAge; | ||
| } | ||
|
|
||
| /** | ||
| * @return mixed[] | ||
| */ | ||
| public static function getSubscribedEvents(): array | ||
| { | ||
| return [KernelEvents::REQUEST => ['onRequest', 1024]]; | ||
| } | ||
|
|
||
| /** | ||
| * @internal | ||
| */ | ||
| public function onRequest( | ||
| GetResponseEvent $event, | ||
| string $eventName, | ||
| EventDispatcherInterface $eventDispatcher | ||
| ): void { | ||
| if (!$event->isMasterRequest()) { | ||
| return; | ||
| } | ||
|
|
||
| $request = $event->getRequest(); | ||
| $origin = $request->headers->get('Origin'); | ||
|
|
||
| if ($origin === null || $origin === $request->getSchemeAndHttpHost()) { | ||
| return; | ||
| } elseif ($request->isMethod('OPTIONS')) { | ||
| $event->setResponse($this->createPreflightResponse($request)); | ||
|
|
||
| return; | ||
| } elseif ($this->checkOrigin($request)) { | ||
| $eventDispatcher->addListener(KernelEvents::RESPONSE, [$this, 'onResponse']); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @internal | ||
| */ | ||
| public function onResponse( | ||
| FilterResponseEvent $event, | ||
| string $eventName, | ||
| EventDispatcherInterface $eventDispatcher | ||
| ): void { | ||
| if (!$event->isMasterRequest()) { | ||
| return; | ||
| } | ||
|
|
||
| $eventDispatcher->removeListener($eventName, [$this, 'onResponse']); | ||
| $response = $event->getResponse(); | ||
| $response->headers->set('Access-Control-Allow-Origin', $event->getRequest()->headers->get('Origin')); | ||
|
|
||
| if ($this->exposedHeaders) { | ||
| $response->headers->set('Access-Control-Expose-Headers', implode(', ', $this->exposedHeaders)); | ||
| } | ||
|
|
||
| if ($this->areCredentialsAllowed) { | ||
| $response->headers->set('Access-Control-Allow-Credentials', 'true'); | ||
| } | ||
| } | ||
|
|
||
| private function createPreflightResponse(Request $request): Response | ||
| { | ||
| $response = new Response; | ||
| $response->headers->set('Content-Type', 'text/plain'); | ||
| $headers = $request->headers->get('Access-Control-Request-Headers'); | ||
|
|
||
| if ($allowedMethods = $this->allowedMethods) { | ||
| $response->headers->set('Access-Control-Allow-Methods', implode(', ', $allowedMethods)); | ||
| } | ||
|
|
||
| if ($this->allowedHeaders) { | ||
| if ($allowedHeaders = $this->allowedHeaders === true ? $headers : implode(', ', $this->allowedHeaders)) { | ||
| $response->headers->set('Access-Control-Allow-Headers', $allowedHeaders); | ||
| } | ||
| } | ||
|
|
||
| if ($this->areCredentialsAllowed) { | ||
| $response->headers->set('Access-Control-Allow-Credentials', 'true'); | ||
| } | ||
|
|
||
| if ($this->maximumAge) { | ||
| $response->headers->set('Access-Control-Max-Age', $this->maximumAge); | ||
| } | ||
|
|
||
| if (!$this->checkOrigin($request)) { | ||
| $response->headers->set('Access-Control-Allow-Origin', 'null'); | ||
|
|
||
| return $response; | ||
| } | ||
|
|
||
| $response->headers->set('Access-Control-Allow-Origin', $request->headers->get('Origin')); | ||
| $method = strtoupper($request->headers->get('Access-Control-Request-Method')); | ||
|
|
||
| if (!in_array($method, $allowedMethods, true)) { | ||
| return $response->setStatusCode(405); | ||
| } elseif (!in_array($method, $allowedMethods, true)) { | ||
| $allowedMethods[] = $method; | ||
| $response->headers->set('Access-Control-Allow-Methods', implode(', ', $allowedMethods)); | ||
| } | ||
|
|
||
| if ($this->allowedHeaders !== true && $headers) { | ||
| foreach (preg_split('~, *~', trim(strtolower($headers))) as $header) { | ||
| if (!in_array($header, self::SIMPLE_HEADERS, true)) { | ||
| continue; | ||
| } elseif (!in_array($header, $this->allowedHeaders, true)) { | ||
| $response | ||
| ->setStatusCode(400) | ||
| ->setContent(sprintf('Unauthorized header "%s".', $header)); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return $response; | ||
| } | ||
|
|
||
| private function checkOrigin(Request $request): bool | ||
| { | ||
| if ($this->allowedOrigins === true) { | ||
| return true; | ||
| } | ||
|
|
||
| $origin = new Uri($request->headers->get('Origin')); | ||
|
|
||
| foreach ((array) $this->allowedOrigins as $allowedOrigin) { | ||
| $allowedOrigin = Strings::contains($allowedOrigin, '//') | ||
| ? $allowedOrigin | ||
| : sprintf('//%s', $allowedOrigin); | ||
| $allowedOrigin = new Uri($allowedOrigin); | ||
|
|
||
| if ( | ||
| $origin->host() === $allowedOrigin->host() | ||
| && (!$allowedOrigin->scheme() || $allowedOrigin->scheme() === $origin->scheme()) | ||
| ) { | ||
| return true; | ||
| } | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
| } |
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