[OperationContract]
    [WebGet(ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
    public GA_Output GA_Calc_GET(string id)
    {
      GA_Output dtr_obj = new GA_Output();
      try
      {
        WebOperationContext.Current.OutgoingResponse.Headers.Add("Access-Control-Allow-Origin", "*");

        Thread.Sleep(300000);

      }
      catch (Exception ex)
      {
        dtr_obj.ErrorResponse.SetError(ex);
      }

      return dtr_obj;
    }

	<system.web>
		<customErrors mode="Off" />
		<httpRuntime executionTimeout="1200" maxRequestLength="2097151" maxUrlLength="102400" maxQueryStringLength="102400" />
	</system.web>