public XmlDocument DoExchange(XmlDocument request)
        {
            XmlDocument response = new XmlDocument();
            Sys         system   = GetSystem();

            try
            {
                if (Auth.VerifySignHttp(Context, ref request))
                {
                    response = OraDB.CallStoredProc(system.SystemId, ref request);
                }
                else
                {
                    response = VerifySignFail();
                    Context.Response.StatusCode        = 401;
                    Context.Response.StatusDescription = "Unauthorized";
                }
            }
            catch (Exception ex)
            {
                response = GetInternalErrorResponse();
                logger.Error(ex, "Произошла ошибка!");
            }
            finally
            {
                Auth.MakeSignHttp(Context, ref response);
            }
            return(response);
        }