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<?php |
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namespace ShiftOneLabs\LaravelCors\Http\Middleware; |
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use Closure; |
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use Illuminate\Routing\Router; |
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use Symfony\Component\HttpFoundation\Response; |
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use ShiftOneLabs\LaravelCors\CorsPolicyManager; |
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class ApplyCorsPolicy |
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{ |
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/** @var \ShiftOneLabs\LaravelCors\CorsPolicyManager $corsPolicyManager */ |
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protected $corsPolicyManager; |
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/** |
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* Create a new middleware instance. |
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* |
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* @param \ShiftOneLabs\LaravelCors\CorsPolicyManager $corsPolicyManager |
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* |
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* @return void |
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*/ |
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public function __construct(CorsPolicyManager $corsPolicyManager) |
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{ |
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$this->corsPolicyManager = $corsPolicyManager; |
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} |
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/** |
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* Handle an incoming request. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @param \Closure $next |
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* @param string|null $profile |
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* |
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* @return \Symfony\Component\HttpFoundation\Response |
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*/ |
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public function handle($request, Closure $next, $profile = null) |
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{ |
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$cors = $this->corsPolicyManager->make($profile); |
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if (!$cors->isCorsRequest($request)) { |
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return $next($request); |
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} |
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if ($cors->isPreflightRequest($request)) { |
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$preflightResponse = $cors->handlePreflightRequest($request); |
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// Stop the call stack once a rejected preflight response is made. |
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if ($cors->isPreflightRejected($preflightResponse)) { |
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return $this->prepareResponse($preflightResponse); |
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} |
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// If this preflight was successful, move on to the next. |
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$response = $next($request); |
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// The destination core is plain text, not a response object. If we |
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// hit the core, or the last middleware failed, return the current |
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// preflight response. If we're on the way down the stack, |
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// continue to return the last preflight response. |
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return $this->prepareResponse($response instanceof Response && $response->isSuccessful() ? $response : $preflightResponse); |
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} |
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// Stop the call stack once a CORS request is rejected. |
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if (!$cors->isActualRequestAllowed($request)) { |
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return $this->prepareResponse($cors->createNotAllowedResponse($request)); |
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} |
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$response = Router::toResponse($request, $next($request)); |
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// CORS policy already applied. |
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if ($response->headers->has('X-S1L-CORS-HANDLED')) { |
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return $this->prepareResponse($response); |
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} |
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return $this->prepareResponse($cors->addActualRequestHeaders($response, $request)); |
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} |
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/** |
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* Prepare the response that has been handled by the CORS middleware. |
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* |
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* @param \Symfony\Component\HttpFoundation\Response $response |
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* |
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* @return \Symfony\Component\HttpFoundation\Response |
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*/ |
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protected function prepareResponse(Response $response) |
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{ |
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$response->headers->set('X-S1L-CORS-HANDLED', true); |
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return $response; |
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} |
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} |
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shiftonelabs /
laravel-cors
