/**
* Performs the soaprequest
*
* @param OperationInterface $operation The operation
* @param array $params Requestparameters 'ParameterName' => 'ParameterValue'
*
* @return array The response as an array with stdClass objects
*/
protected function performSoapRequest(OperationInterface $operation, $params)
{
$soapClient = new \SoapClient($this->webserviceWsdl, array('exceptions' => 1));
$soapClient->__setLocation(str_replace('%%COUNTRY%%', $this->configuration->getCountry(), $this->webserviceEndpoint));
$soapClient->__setSoapHeaders($this->buildSoapHeader($operation));
return $soapClient->__soapCall($operation->getName(), array($params));
}
/**
* Builds the final querystring including the signature
*
* @param array $params
* @param ConfigurationInterface $configuration
*
* @return string
*/
protected function buildQueryString(array $params, ConfigurationInterface $configuration)
{
$parameterList = [];
foreach ($params as $key => $value) {
$parameterList[] = sprintf('%s=%s', $key, rawurlencode($value));
}
$parameterList[] = 'Signature=' . rawurlencode($this->buildSignature($parameterList, $configuration->getCountry(), $configuration->getSecretKey()));
return implode("&", $parameterList);
}
/**
* Calculates the signature for the request
*
* @param array $params
*
* @return string
*/
protected function buildSignature(array $params)
{
$template = "GET\nwebservices.amazon.%s\n/onca/xml\n%s";
return Util::buildSignature(sprintf($template, $this->configuration->getCountry(), implode('&', $params)), $this->configuration->getSecretKey());
}