public function getBucketCors($bucket, $options = NULL)
    {
        $this->precheckCommon($bucket, NULL, $options, false);
        $options[self::OSS_BUCKET] = $bucket;
        $options[self::OSS_METHOD] = self::OSS_HTTP_GET;
        $options[self::OSS_OBJECT] = '/';
        $options[self::OSS_SUB_RESOURCE] = 'cors';
        $response = $this->auth($options);
        $result = new GetCorsResult($response, __FUNCTION__);
        return $result->getData();
    }