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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 Psr\Http\Message\ResponseFactoryInterface; |
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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 ResponseFactoryInterface |
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*/ |
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private $responseFactory; |
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/** |
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* @var string[] |
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*/ |
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private $allowOrigin; |
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/** |
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* @var string[] |
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*/ |
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private $allowMethods; |
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/** |
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* @var string[] |
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*/ |
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private $allowHeaders; |
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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 int |
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*/ |
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private $maxAge; |
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/** |
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* @param ResponseFactoryInterface $responseFactory |
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* @param string[] $allowHeaders |
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* @param string[] $allowMethods |
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* @param string[] $allowOrigin |
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* @param bool $allowCredentials |
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* @param int $maxAge |
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*/ |
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public function __construct( |
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ResponseFactoryInterface $responseFactory, |
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array $allowOrigin, |
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array $allowMethods, |
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array $allowHeaders, |
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bool $allowCredentials = false, |
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int $maxAge = 600 |
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) { |
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$this->responseFactory = $responseFactory; |
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$this->allowOrigin = $allowOrigin; |
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$this->allowMethods = $allowMethods; |
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$this->allowHeaders = $allowHeaders; |
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$this->allowCredentials = $allowCredentials; |
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$this->maxAge = $maxAge; |
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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 $handler): ResponseInterface |
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{ |
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if ('OPTIONS' === strtoupper($request->getMethod())) { |
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return $this->responseFactory->createResponse(204) |
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->withHeader('Access-Control-Allow-Origin', $this->getAllowOrigin($request)) |
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->withHeader('Access-Control-Allow-Methods', implode(', ', $this->allowMethods)) |
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->withHeader('Access-Control-Allow-Headers', implode(', ', $this->allowHeaders)) |
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->withHeader('Access-Control-Allow-Credentials', $this->allowCredentials ? 'true' : 'false') |
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->withHeader('Access-Control-Max-Age', (string) $this->maxAge) |
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; |
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} |
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return $handler->handle($request) |
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->withHeader('Access-Control-Allow-Origin', $this->getAllowOrigin($request)) |
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->withHeader('Access-Control-Allow-Credentials', $this->allowCredentials ? 'true' : 'false') |
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; |
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} |
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/** |
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* @param ServerRequestInterface $request |
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* |
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* @return string |
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*/ |
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private function getAllowOrigin(ServerRequestInterface $request): string |
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{ |
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if ('' === $origin = $request->getHeaderLine('Origin')) { |
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return ''; |
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} |
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foreach ($this->allowOrigin as $allowOrigin) { |
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if ('~' === $allowOrigin[0] ?? '') { |
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if (1 === preg_match('!'.substr($allowOrigin, 1).'!', $origin)) { |
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return $origin; |
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} |
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} else { |
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if ($allowOrigin === $origin) { |
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return $origin; |
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} |
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} |
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} |
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return ''; |
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} |
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} |
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chubbyphp /
chubbyphp-cors
