public string Upload(Context context, long id, ContentRangeHeaderValue contentRange)
        {
            var log    = new SysLogModel(context: context);
            var result = context.Authenticated
                ? BinaryUtilities.UploadFile(context, id, contentRange)
                : Messages.ResponseAuthentication(context: context).ToJson();

            log.Finish(context: context, responseSize: result.Length);
            return(result);
        }