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<?php |
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namespace BenTools\GuzzleHttp\Middleware; |
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use BenTools\GuzzleHttp\Middleware\Storage\Adapter\ArrayAdapter; |
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use BenTools\GuzzleHttp\Middleware\Storage\Counter; |
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use BenTools\GuzzleHttp\Middleware\Storage\ThrottleStorageInterface; |
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use Psr\Http\Message\RequestInterface; |
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class ThrottleMiddleware |
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{ |
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/** |
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* @var ThrottleConfiguration[] |
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*/ |
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private $configurations = []; |
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/** |
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* @var ThrottleStorageInterface |
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*/ |
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private $storage; |
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/** |
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* ThrottleMiddleware constructor. |
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* @param ThrottleStorageInterface $storage |
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*/ |
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public function __construct(ThrottleStorageInterface $storage = null) |
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{ |
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$this->storage = $storage ?? new ArrayAdapter(); |
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} |
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/** |
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* @param ThrottleConfiguration $configuration |
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*/ |
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public function registerConfiguration(ThrottleConfiguration $configuration) |
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{ |
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$this->configurations[$configuration->getStorageKey()] = $configuration; |
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} |
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public function __invoke(callable $handler) |
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{ |
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return function (RequestInterface $request, array $options) use ($handler) { |
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foreach ($this->configurations as $configuration) { |
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// Request match - Check if we need to throttle |
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if ($configuration->matchRequest($request)) { |
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if (!$this->storage->hasCounter($configuration->getStorageKey())) { |
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$counter = new Counter($configuration->getDuration()); |
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$counter->increment(); |
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$this->storage->saveCounter($configuration->getStorageKey(), $counter, $configuration->getDuration()); |
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} else { |
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$counter = $this->storage->getCounter($configuration->getStorageKey()); |
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if ($counter->count() >= $configuration->getMaxRequests()) { |
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usleep($counter->getRemainingTime() * 1000000); |
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} else { |
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$counter->increment(); |
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$this->storage->saveCounter($configuration->getStorageKey(), $counter); |
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} |
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} |
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break; |
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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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} |
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bpolaszek /
guzzle-throttle-middleware
