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<?php declare(strict_types=1); |
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namespace ApiClients\Middleware\Timer\Response; |
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use ApiClients\Foundation\Middleware\Annotation\First; |
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use ApiClients\Foundation\Middleware\Annotation\Last; |
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use ApiClients\Foundation\Middleware\MiddlewareInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use React\Promise\CancellablePromiseInterface; |
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use Throwable; |
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use function React\Promise\resolve; |
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final class Middleware implements MiddlewareInterface |
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{ |
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const HEADER = 'X-Middleware-Timer-Response'; |
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/** |
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* @var float[] |
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*/ |
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private $times; |
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/** |
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* Return the processed $request via a fulfilled promise. |
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* When implementing cache or other feature that returns a response, do it with a rejected promise. |
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* If neither is possible, e.g. on some kind of failure, resolve the unaltered request. |
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* |
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* @param RequestInterface $request |
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* @param string $transactionId |
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* @param array $options |
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* @return CancellablePromiseInterface |
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* |
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* @Last() |
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*/ |
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public function pre( |
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RequestInterface $request, |
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string $transactionId, |
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array $options = [] |
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): CancellablePromiseInterface { |
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$this->times[$transactionId] = microtime(true); |
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return resolve($request); |
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} |
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/** |
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* Return the processed $response via a promise. |
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* |
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* @param ResponseInterface $response |
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* @param string $transactionId |
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* @param array $options |
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* @return CancellablePromiseInterface |
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* |
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* @First() |
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*/ |
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public function post( |
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ResponseInterface $response, |
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string $transactionId, |
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array $options = [] |
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): CancellablePromiseInterface { |
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$time = microtime(true) - $this->times[$transactionId]; |
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unset($this->times[$transactionId]); |
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return resolve($response->withAddedHeader(self::HEADER, (string)$time)); |
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} |
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/** |
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* @param Throwable $throwable |
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* @param string $transactionId |
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* @param array $options |
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* @return CancellablePromiseInterface |
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*/ |
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public function error( |
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Throwable $throwable, |
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string $transactionId, |
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array $options = [] |
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): CancellablePromiseInterface { |
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unset($this->times[$transactionId]); |
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} |
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} |
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php-api-clients /
middleware-timer-response
