/**
* _invokePost takes the parameters and invokes the _httpPost function to POST the parameters
* exponential retries on error 500 and 503
* The response from the POST is an XML which is converted to Array
*/
private function _invokePost($parameters)
{
$response = array();
$statusCode = 200;
$this->_success = false;
/* Submit the request and read response body */
try {
$shouldRetry = true;
$retries = 0;
do {
try {
$this->_constructUserAgentHeader();
$httpCurlRequest = new HttpCurl($this->_config);
$httpCurlRequest->_httpPost($this->_mwsServiceUrl, $this->_userAgent, $parameters);
$response = $httpCurlRequest->getResponse();
//split the API response into Response Body and the other parts of the response into other
list($other, $responseBody) = explode("\r\n\r\n", $response, 2);
$other = preg_split("/\r\n|\n|\r/", $other);
list($protocol, $code, $text) = explode(' ', trim(array_shift($other)), 3);
$response = array('Status' => (int) $code, 'ResponseBody' => $responseBody);
$statusCode = $response['Status'];
if ($statusCode == 200) {
$shouldRetry = false;
$this->_success = true;
} elseif ($statusCode == 500 || $statusCode == 503) {
$shouldRetry = true;
if ($shouldRetry && strtolower($this->_config['handle_throttle'])) {
$this->_pauseOnRetry(++$retries, $statusCode);
}
} else {
$shouldRetry = false;
}
} catch (Exception $e) {
throw $e;
}
} while ($shouldRetry);
} catch (Exception $se) {
throw $se;
}
return $response;
}
