protected function parseDataFromResponse()
{
$content = $this->rawResponse->body;
if (empty($content)) {
throw new OssException("body is null");
}
$xml = simplexml_load_string($content);
if (isset($xml->AccessControlList->Grant)) {
return strval($xml->AccessControlList->Grant);
} else {
throw new OssException("xml format exception");
}
}