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<?php |
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/** |
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* Rule of CORS |
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* User: moyo |
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* Date: 2019-01-08 |
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* Time: 15:22 |
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*/ |
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namespace Carno\Web\Policy\Rules; |
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use Carno\HTTP\Standard\Response; |
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use Carno\HTTP\Standard\ServerRequest; |
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class CORS |
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{ |
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/** |
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* @var string |
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*/ |
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private $origin = '*'; |
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/** |
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* @var array |
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*/ |
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private $methods = []; |
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/** |
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* @var array |
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*/ |
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private $headers = []; |
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/** |
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* @var array |
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*/ |
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private $exposes = []; |
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/** |
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* @var bool |
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*/ |
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private $credentials = false; |
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/** |
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* @var int |
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*/ |
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private $expired = 0; |
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/** |
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* CORS constructor. |
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* @param string $origin |
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*/ |
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public function __construct(string $origin) |
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{ |
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$this->origin = $origin; |
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} |
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/** |
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* @param string ...$methods |
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* @return static |
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*/ |
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public function methods(string ...$methods) : self |
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{ |
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$this->methods = array_map('strtoupper', $methods); |
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return $this; |
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} |
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/** |
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* @param string ...$headers |
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* @return static |
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*/ |
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public function headers(string ...$headers) : self |
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{ |
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$this->headers = $headers; |
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return $this; |
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} |
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/** |
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* @param string ...$headers |
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* @return static |
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*/ |
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public function exposes(string ...$headers) : self |
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{ |
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$this->exposes = $headers; |
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return $this; |
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} |
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/** |
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* @param bool $yes |
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* @return static |
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*/ |
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public function credentials(bool $yes) : self |
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{ |
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$this->credentials = $yes; |
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return $this; |
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} |
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/** |
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* @param int $seconds |
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* @return static |
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*/ |
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public function expired(int $seconds) : self |
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{ |
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$this->expired = $seconds; |
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return $this; |
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} |
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/** |
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* @param ServerRequest $sr |
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* @param Response $respond |
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* @return Response |
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*/ |
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final public function process(ServerRequest $sr, Response $respond) : Response |
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{ |
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if ($this->origin === '*' && $this->credentials) { |
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$origin = $sr->getHeaderLine('Origin') ?: '*'; |
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} |
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$respond->withHeader('Access-Control-Allow-Origin', $origin ?? $this->origin); |
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$this->methods && $respond->withHeader('Access-Control-Allow-Methods', $this->methods); |
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$this->headers && $respond->withHeader('Access-Control-Allow-Headers', $this->headers); |
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$this->exposes && $respond->withHeader('Access-Control-Expose-Headers', $this->exposes); |
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$this->credentials && $respond->withHeader('Access-Control-Allow-Credentials', 'true'); |
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$this->expired > 0 && $respond->withHeader('Access-Control-Max-Age', $this->expired); |
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return $respond; |
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} |
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} |
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This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.