docs: function multipartInit(params, callback) {
  
      // 特殊处理 Cache-Control
      var headers = params.Headers;
      !headers['Cache-Control'] && (headers['Cache-Control'] = '');
  
      submitRequest.call(this, {
          Action: 'name/cos:InitiateMultipartUpload',
          method: 'POST',
          Bucket: params.Bucket,
          Region: params.Region,
          Key: params.Key,
          action: 'uploads',
          headers: params.Headers,
      }, function (err, data) {
          if (err) {
              return callback(err);
          }
          data = util.clone(data || {});
          if (data && data.InitiateMultipartUploadResult) {
              return callback(null, util.extend(data.InitiateMultipartUploadResult, {
                  statusCode: data.statusCode,
                  headers: data.headers,
              }));
          }
          callback(null, data);
      });
  }