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<?php |
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declare(strict_types=1); |
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namespace Chubbyphp\Cors; |
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use Chubbyphp\Cors\Negotiation\Origin\OriginNegotiatorInterface; |
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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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final class CorsMiddleware implements MiddlewareInterface |
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{ |
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/** |
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* @var OriginNegotiatorInterface |
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*/ |
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private $originNegotiator; |
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/** |
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* @var bool |
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*/ |
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private $allowCredentials; |
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/** |
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* @var array |
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*/ |
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private $exposeHeaders; |
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/** |
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* @param OriginNegotiatorInterface $originNegotiator |
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* @param bool $allowCredentials |
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* @param array $exposeHeaders |
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*/ |
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public function __construct( |
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OriginNegotiatorInterface $originNegotiator, |
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bool $allowCredentials = false, |
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array $exposeHeaders = [] |
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) { |
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$this->originNegotiator = $originNegotiator; |
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$this->allowCredentials = $allowCredentials; |
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$this->exposeHeaders = $exposeHeaders; |
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} |
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/** |
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* @param ServerRequestInterface $request |
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* @param RequestHandlerInterface $handler |
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* |
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* @return ResponseInterface |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$allowOrigin = $this->originNegotiator->negotiate($request); |
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$request = $request->withAttribute('allowOrigin', $allowOrigin); |
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$response = $handler->handle($request); |
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if (null !== $allowOrigin) { |
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$response = $response |
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->withHeader('Access-Control-Allow-Origin', $allowOrigin) |
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->withHeader('Access-Control-Allow-Credentials', $this->allowCredentials ? 'true' : 'false') |
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->withHeader('Access-Control-Expose-Headers', implode(', ', $this->exposeHeaders)) |
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; |
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} |
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return $response; |
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} |
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} |
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