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<?php |
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declare(strict_types=1); |
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namespace Shlinkio\Shlink\Rest\Middleware; |
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use Fig\Http\Message\RequestMethodInterface; |
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use Laminas\Diactoros\Response\EmptyResponse; |
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use Mezzio\Router\RouteResult; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use function array_merge; |
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use function implode; |
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class CrossDomainMiddleware implements MiddlewareInterface, RequestMethodInterface |
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{ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$response = $handler->handle($request); |
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if (! $request->hasHeader('Origin')) { |
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return $response; |
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} |
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// Add Allow-Origin header |
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$response = $response->withHeader('Access-Control-Allow-Origin', $request->getHeader('Origin')) |
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->withHeader('Access-Control-Expose-Headers', AuthenticationMiddleware::API_KEY_HEADER); |
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if ($request->getMethod() !== self::METHOD_OPTIONS) { |
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return $response; |
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} |
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return $this->addOptionsHeaders($request, $response); |
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} |
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private function addOptionsHeaders(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface |
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{ |
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/** @var RouteResult|null $matchedRoute */ |
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$matchedRoute = $request->getAttribute(RouteResult::class); |
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$matchedMethods = $matchedRoute !== null ? $matchedRoute->getAllowedMethods() : [ |
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self::METHOD_GET, |
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self::METHOD_POST, |
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self::METHOD_PUT, |
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self::METHOD_PATCH, |
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self::METHOD_DELETE, |
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self::METHOD_OPTIONS, |
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]; |
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$corsHeaders = [ |
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'Access-Control-Allow-Methods' => implode(',', $matchedMethods), |
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'Access-Control-Max-Age' => '1000', |
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'Access-Control-Allow-Headers' => $request->getHeaderLine('Access-Control-Request-Headers'), |
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]; |
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// Options requests should always be empty and have a 204 status code |
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return EmptyResponse::withHeaders(array_merge($response->getHeaders(), $corsHeaders)); |
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} |
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} |
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shlinkio /
shlink
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