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<?php |
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namespace ShopifyClient; |
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use GuzzleHttp\ClientInterface; |
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use GuzzleHttp\Exception\ClientException; |
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use ShopifyClient\Exception\ShopifyException; |
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class Request |
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{ |
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const API_CALL_LIMIT_HEADER = 'http_x_shopify_shop_api_call_limit'; |
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const METHOD_POST = 'POST'; |
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const METHOD_GET = 'GET'; |
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const METHOD_PUT = 'PUT'; |
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const METHOD_DELETE = 'DELETE'; |
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/** |
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* @var ClientInterface |
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*/ |
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protected $httpClient; |
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/** |
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* @var string |
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*/ |
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protected $responseKey; |
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/** |
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* @var int |
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*/ |
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private $rateLimit; |
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/** |
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* @var int |
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*/ |
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private $callsMade; |
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/** |
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* @var float |
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*/ |
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private static $callCycle = 0.5; // avg. 2 calls a second |
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/** |
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* @var float |
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*/ |
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private $rateLimitThreshold = 0.8; |
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/** |
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* @var int |
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*/ |
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private $rateLimitReached = 0; |
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/** |
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* Request constructor. |
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* @param ClientInterface $client |
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*/ |
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public function __construct(ClientInterface $client) |
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{ |
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$this->httpClient = $client; |
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} |
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/** |
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* @param string $method |
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* @param string $endpoint |
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* @param array $parameters |
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* @return bool |
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* @throws ShopifyException |
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*/ |
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public function request(string $method, string $endpoint, array $parameters = []) |
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{ |
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$this->handleRateLimit(); |
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try { |
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$response = $this->httpClient->request($method, $endpoint, $parameters); |
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} catch (ClientException $e) { |
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$response = $e->getResponse(); |
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$content = json_decode($response->getBody()->getContents(), true); |
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throw new ShopifyException($content['errors'], $response->getStatusCode(), $e); |
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} |
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$this->setRateLimit($response->getHeader(self::API_CALL_LIMIT_HEADER)); |
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$data = json_decode($response->getBody()->getContents(), true); |
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if (strlen($this->responseKey) > 0) { |
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return $data[$this->responseKey]; |
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} else { |
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return true; |
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} |
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} |
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/** |
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* @param string $responseKey |
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* @return Request |
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*/ |
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public function setResponseKey($responseKey) |
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{ |
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$this->responseKey = $responseKey; |
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} |
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/** |
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* @param callable $function |
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* @return mixed |
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*/ |
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public static function throttle(callable $function) |
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{ |
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$start = time(); |
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$result = $function(); |
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$end = time(); |
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$duration = $end - $start; |
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$waitTime = ceil(self::$callCycle - $duration); |
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if ($waitTime > 0) { |
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sleep($waitTime); |
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} |
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return $result; |
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} |
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/** |
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* @return int |
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*/ |
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public function getRateLimitReached(): int |
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{ |
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return $this->rateLimitReached; |
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} |
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private function handleRateLimit() |
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{ |
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if ($this->callsMade > 0 && $this->isRateLimitReached()) { |
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$this->rateLimitReached++; |
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// Prevent bucket overflow |
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// https://help.shopify.com/api/getting-started/api-call-limit |
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usleep(rand(3, 10) * 1000000); |
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} |
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} |
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/** |
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* @param array $header |
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*/ |
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private function setRateLimit(array $header) |
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{ |
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if (empty($header)) { |
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return; |
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} |
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$parts = explode('/', $header[0]); |
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$this->rateLimit = $parts[1]; |
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$this->callsMade = $parts[0]; |
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} |
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/** |
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* @return bool |
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*/ |
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121 |
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public function isRateLimitReached(): bool |
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{ |
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return $this->getCallLimit() >= $this->rateLimitThreshold; |
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} |
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/** |
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* @return float|int |
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*/ |
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121 |
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public function getCallLimit() |
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{ |
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return $this->callsMade / $this->rateLimit; |
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} |
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167
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} |
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168
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Edwin-Luijten /
shopify-client
