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<?php |
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namespace hamburgscleanest\GuzzleAdvancedThrottle\Middleware; |
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use hamburgscleanest\GuzzleAdvancedThrottle\Cache\Interfaces\CacheStrategy; |
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use hamburgscleanest\GuzzleAdvancedThrottle\RequestLimitRuleset; |
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use Psr\Http\Message\RequestInterface; |
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use Symfony\Component\HttpKernel\Exception\TooManyRequestsHttpException; |
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/** |
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* Class ThrottleMiddleware |
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* @package hamburgscleanest\GuzzleAdvancedThrottle\Middleware |
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*/ |
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class ThrottleMiddleware |
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{ |
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/** @var \hamburgscleanest\GuzzleAdvancedThrottle\RequestLimitGroup */ |
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private $_requestLimitGroup; |
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/** @var CacheStrategy|null */ |
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private $_cacheStrategy; |
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/** |
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* ThrottleMiddleware constructor. |
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* @param RequestLimitRuleset $requestLimitRuleset |
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* @param CacheStrategy|null $cacheStrategy |
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* @throws \Exception |
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*/ |
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public function __construct(RequestLimitRuleset $requestLimitRuleset, CacheStrategy $cacheStrategy = null) |
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{ |
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$this->_requestLimitGroup = $requestLimitRuleset->getRequestLimitGroup(); |
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$this->_cacheStrategy = $cacheStrategy; |
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} |
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/** |
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* @return callable |
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* @throws \Symfony\Component\HttpKernel\Exception\TooManyRequestsHttpException |
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* @throws \Exception |
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*/ |
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public function handle() : callable |
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{ |
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return function(callable $handler) : callable |
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return function(RequestInterface $request, array $options) use ($handler) |
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if ($this->_cacheStrategy !== null) |
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return $this->_cacheStrategy->request($request, $this->_requestHandler($handler, $request, $options)); |
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} |
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return $this->_requestHandler($handler, $request, $options)(); |
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}; |
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}; |
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} |
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/** |
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* @param callable $handler |
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* @param RequestInterface $request |
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* @param array $options |
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* @return callable |
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* @throws \Exception |
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*/ |
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private function _requestHandler(callable $handler, RequestInterface $request, array $options) : callable |
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{ |
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return function() use ($handler, $request, $options) |
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{ |
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if (!$this->_requestLimitGroup->canRequest()) |
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{ |
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throw new TooManyRequestsHttpException( |
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$this->_requestLimitGroup->getRetryAfter(), |
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'The rate limit was exceeded. Please try again later.' |
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); |
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} |
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return $handler($request, $options); |
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}; |
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} |
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} |
hamburgscleanest /
guzzle-advanced-throttle
