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<?php |
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namespace Kelemen\ApiNette\Middleware; |
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use Kelemen\ApiNette\Exception\MiddlewareException; |
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use Kelemen\ApiNette\Response\JsonApiResponse; |
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use Nette\Http\Request; |
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use Nette\Http\Response; |
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class CORSHeaders implements MiddlewareInterface |
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{ |
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const MIRROR = 'mirror'; |
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const ALL = 'all'; |
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const CUSTOM = 'custom'; |
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/** @var string */ |
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private $behaviour; |
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/** @var array */ |
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private $allowedOrigins = []; |
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/** @var bool */ |
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private $allowedCredentials = false; |
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/** |
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* @param string $behaviour |
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* @throws MiddlewareException |
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*/ |
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public function __construct($behaviour = self::ALL) |
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{ |
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if (!in_array($behaviour, [self::MIRROR, self::ALL, self::CUSTOM])) { |
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throw new MiddlewareException('Behaviour ' . $behaviour . ' is not allowed value'); |
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} |
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$this->behaviour = $behaviour; |
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} |
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/** |
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* @param array $allowedOrigins |
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* @return CORSHeaders |
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*/ |
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public function allowedOrigins(array $allowedOrigins) |
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{ |
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$this->allowedOrigins = $allowedOrigins; |
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return $this; |
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} |
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/** |
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* @param bool $allowCredentials |
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* @return CORSHeaders |
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*/ |
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public function allowCredentials($allowCredentials = true) |
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{ |
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$this->allowedCredentials = $allowCredentials; |
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return $this; |
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} |
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/** |
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* @param Request $request |
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* @param Response $response |
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* @param callable $next |
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* @return JsonApiResponse |
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*/ |
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public function __invoke(Request $request, Response $response, callable $next) |
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{ |
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$origin = $request->getHeader('Origin'); |
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// Add CORS headers only if mandatory "Origin" header is set |
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if (!$origin) { |
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return $next($request, $response); |
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} |
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switch ($this->behaviour) { |
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case self::ALL: |
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$this->applyAll($response); |
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break; |
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case self::MIRROR: |
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$this->applyMirror($response, $origin); |
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break; |
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case self::CUSTOM: |
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$this->applyCustom($response); |
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} |
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return $next($request, $response); |
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} |
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/** |
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* @param Response $response |
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* @throws MiddlewareException |
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*/ |
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private function applyAll(Response $response) |
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{ |
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$response->setHeader('Access-Control-Allow-Origin', '*'); |
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} |
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/** |
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* @param Response $response |
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* @param string $origin |
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*/ |
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private function applyMirror(Response $response, $origin) |
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{ |
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$response->setHeader('Access-Control-Allow-Origin', $origin); |
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if ($this->allowedCredentials) { |
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$response->setHeader('Access-Control-Allow-Credentials', true); |
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} |
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} |
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/** |
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* @param Response $response |
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* @throws MiddlewareException |
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*/ |
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2 |
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private function applyCustom(Response $response) |
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{ |
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if (!count($this->allowedOrigins)) { |
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throw new MiddlewareException('Variable $allowedOrigins cannot be empty for CUSTOM behaviour'); |
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} |
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$response->setHeader('Access-Control-Allow-Origin', implode(',', $this->allowedOrigins)); |
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if ($this->allowedCredentials) { |
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$response->setHeader('Access-Control-Allow-Credentials', true); |
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} |
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} |
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} |
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ricco24 /
api-nette
