public function addBucketCname($bucket, $cname, $options = NULL)
{
$this->precheckCommon($bucket, NULL, $options, false);
$options[self::OSS_BUCKET] = $bucket;
$options[self::OSS_METHOD] = self::OSS_HTTP_POST;
$options[self::OSS_OBJECT] = '/';
$options[self::OSS_SUB_RESOURCE] = 'cname';
$options[self::OSS_CONTENT_TYPE] = 'application/xml';
$cnameConfig = new CnameConfig();
$cnameConfig->addCname($cname);
$options[self::OSS_CONTENT] = $cnameConfig->serializeToXml();
$options[self::OSS_CNAME_COMP] = 'add';
$response = $this->auth($options);
$result = new PutSetDeleteResult($response);
return $result->getData();
}