/**
* Send a HTTP GET request to PayPal's NVP API and return the response.
* Settings from Yii::app()->getModule('payPal') is used for authentication
* and API version.
*
* Get variables are urlencoded, and imploded using self::urlencode() and
* self::implode().
*
* Failure ACKs received from PayPal is logged.
*
* @param array $getVars Assoc array (NVP values as specified by PayPal NVP API)
* @return mixed Assoc array on success, false on failure
* @throws CException Unrecognized response
*/
public static function nvpRequest($getVars)
{
$module = Yii::app()->getModule('payPal');
// Prepare NVP
$getVars['VERSION'] = PayPalModule::VERSION;
foreach ($module->account->getNvp() as $k => $v) {
$getVars[$k] = $v;
}
// Sent HTTP GET request
$getStr = self::urlencode($getVars);
$getStr = self::implode("&", $getStr);
$response = PPUtils::httpGet(self::getUrl(self::NVP), $getStr, true);
// Return false on HTTP error
if ($response['status'] === false) {
return false;
}
$ack = $response['httpParsedResponseAr']['ACK'];
// Log and return false on PayPal failures / warnings
if ($ack == "Failure" || $ack == "FailureWithWarning" || $ack == "Warning") {
Yii::log("NVP request failed" . "\nRequest:{$getStr}" . "\nResponse:" . self::implode("&", $response['httpParsedResponseAr']), "error", "payPal.helpers.PPUtils");
return false;
}
// Return response on success
if ($ack == "Success" || $ack == "SuccessWithWarning") {
return $response['httpParsedResponseAr'];
}
// Log error and throw exception on unrecognized response
$message = "Received unrecognized response";
Yii::log($message . "\nRequest:{$getStr}" . "\nResponse:" . self::implode("&", $response['httpParsedResponseAr']), "error", "payPal.helpers.PPUtils");
throw new CException($message);
}
