public function getBucketLocation($bucketName, $options = array())
    {
        list($config) = $this->parseOptions($options, BosOptions::CONFIG);
        $response = $this->sendRequest(
            HttpMethod::GET,
            array(
                BosOptions::CONFIG => $config,
                'bucket_name' => $bucketName,
                'params' => array(
                    BosOptions::LOCATION => '',
                ),
            )
        );
        return $response->locationConstraint;
    }