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<?php |
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namespace GroupByInc\API; |
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use Exception; |
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use GroupByInc\API\Util\SerializerFactory; |
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use GroupByInc\API\Util\UriBuilder; |
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use Httpful\Mime; |
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use Httpful\Request; |
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use Httpful\Response; |
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use JMS\Serializer\Serializer; |
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use RuntimeException; |
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abstract class AbstractBridge |
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{ |
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const SEARCH = '/search'; |
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const CLUSTER = '/cluster'; |
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const REFINEMENTS = '/refinements'; |
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const RESULTS_CLASS = 'GroupByInc\API\Model\Results'; |
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const REFINEMENTS_RESULT_CLASS = 'GroupByInc\API\Model\RefinementsResult'; |
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const HTTP = 'http://'; |
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const HTTPS = 'https://'; |
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const COLON = ':'; |
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const MAX_TRIES = 3; |
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const RETRY_TIMEOUT = 80000; |
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const DEFAULT_TIMEOUT = 30; |
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const DEFAULT_CONNECT_TIMEOUT = 15; |
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/** @var string */ |
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private $clientKey; |
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/** @var string */ |
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private $bridgeUrl; |
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/** @var string */ |
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private $bridgeUrlCluster; |
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/** @var string */ |
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private $bridgeRefinementsUrl; |
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/** @var Serializer */ |
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private $serializer; |
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/** @var int */ |
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private $timeout; |
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/** @var int */ |
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private $connectTimeout; |
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/** |
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* @param string $clientKey |
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* @param string $baseUrl |
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*/ |
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function __construct($clientKey, $baseUrl) |
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{ |
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$this->clientKey = $clientKey; |
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$this->bridgeUrl = $baseUrl . self::SEARCH; |
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$this->bridgeUrlCluster = $baseUrl . self::CLUSTER; |
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$this->bridgeRefinementsUrl = $baseUrl . self::SEARCH . self::REFINEMENTS; |
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$this->serializer = SerializerFactory::build(); |
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} |
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/** |
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* @param Query $query |
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* |
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* @return mixed |
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*/ |
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public function search($query) |
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{ |
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$content = $query->getBridgeJson($this->clientKey); |
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return $this->query($this->bridgeUrl, $content, self::RESULTS_CLASS); |
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} |
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/** |
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* @param Query $query |
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* @param string $navigationName |
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* |
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* @return mixed |
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*/ |
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public function refinements($query, $navigationName) |
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{ |
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$content = $query->getBridgeRefinementsJson($this->clientKey, $navigationName); |
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return $this->query($this->bridgeRefinementsUrl, $content, self::REFINEMENTS_RESULT_CLASS); |
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} |
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/** |
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* @param string $url |
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* @param string $content |
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* @param string $class |
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* |
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* @return mixed |
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*/ |
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private function query($url, $content, $class) |
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{ |
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$response = null; |
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$tries = 0; |
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$lastError = null; |
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while ($tries < self::MAX_TRIES) { |
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try { |
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$response = $this->execute($url, $content, $tries); |
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break; |
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} catch (Exception $e) { |
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usleep(self::RETRY_TIMEOUT); |
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error_log('Connection failed, retrying'); |
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$lastError = $e; |
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$tries++; |
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} |
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} |
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if ($tries == self::MAX_TRIES) { |
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throw new RuntimeException("Error: call to URL $url failed after " . self::MAX_TRIES . " tries", 0, $lastError); |
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} |
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if ($response->hasErrors()) { |
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throw new RuntimeException("Error: call to URL $url failed with status $response->code, response $response"); |
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} |
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if ($response->content_type !== Mime::JSON) { |
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throw new RuntimeException("Error: bridge at URL $url did not return the expected JSON response, it returned: " . $response->content_type . " instead"); |
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} |
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$responseBody = $response->raw_body; |
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if (strpos($this->getContentEncoding($response), 'gzip') !== FALSE) { |
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$responseBody = gzdecode($responseBody); |
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} |
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return $this->deserialize($responseBody, $class); |
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} |
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/** |
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* @param string $url |
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* @param string $content |
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* @param int $tries |
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* |
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* @return Response |
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*/ |
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protected function execute($url, $content, $tries) |
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{ |
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echo "sending request $content to $url"; |
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return Request::post($url . "?retry=$tries") |
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->body($content) |
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->timeout(isset($this->timeout) ? $this->timeout : self::DEFAULT_TIMEOUT) |
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->addOnCurlOption(CURLOPT_CONNECTTIMEOUT, isset($this->connectTimeout) ? $this->connectTimeout : self::DEFAULT_CONNECT_TIMEOUT) |
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->sendsType(Mime::JSON) |
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->send(); |
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} |
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/** |
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* @param Response $response |
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* |
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* @return bool|string |
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*/ |
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private function getContentEncoding($response) |
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{ |
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$headers = $response->headers; |
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foreach ($headers as $header) { |
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list($k, $v) = explode(':', $header); |
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if ('content-encoding' == strtolower($k)) { |
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return trim($v); |
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} |
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} |
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return false; |
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} |
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private function deserialize($json, $class) |
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{ |
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$object = null; |
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try { |
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$object = $this->serializer->deserialize($json, $class, 'json'); |
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} catch (RuntimeException $e) { |
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error_log("deserialization failed with exception $e"); |
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} |
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return $object; |
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} |
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/** |
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* @param int $connectTimeout |
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* @return $this |
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*/ |
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public function setConnectTimeout($connectTimeout) |
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{ |
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$this->connectTimeout = $connectTimeout; |
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return $this; |
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} |
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/** |
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* @param int $timeout |
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* @return $this |
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*/ |
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public function setTimeout($timeout) |
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{ |
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$this->timeout = $timeout; |
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return $this; |
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} |
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} |
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.