public function deleteObjects($bucket, $objects, $options = null)
    {
        $this->precheckCommon($bucket, NULL, $options, false);
        if (!is_array($objects) || !$objects) {
            throw new OssException('objects must be array');
        }
        $options[self::OSS_METHOD] = self::OSS_HTTP_POST;
        $options[self::OSS_BUCKET] = $bucket;
        $options[self::OSS_OBJECT] = '/';
        $options[self::OSS_SUB_RESOURCE] = 'delete';
        $options[self::OSS_CONTENT_TYPE] = 'application/xml';
        $quiet = 'false';
        if (isset($options['quiet'])) {
            if (is_bool($options['quiet'])) { //Boolean
                $quiet = $options['quiet'] ? 'true' : 'false';
            } elseif (is_string($options['quiet'])) { // string
                $quiet = ($options['quiet'] === 'true') ? 'true' : 'false';
            }
        }
        $xmlBody = OssUtil::createDeleteObjectsXmlBody($objects, $quiet);
        $options[self::OSS_CONTENT] = $xmlBody;
        $response = $this->auth($options);
        $result = new DeleteObjectsResult($response);
        return $result->getData();
    }