The call to the module:
TForm1.Button9Click procedure (Sender: TObject);
var
TempRequest: TServerRequest;
begin
   Plugin1.Visible: = false;
   Plugin1.MimeType: ='';
   TempRequest: = MyRequestQ.GetNewRequest;
   TempRequest.URL: = 'http://jalsoftware.sytes.net/modules/calcula';
   TempRequest.Params.Add ('value1 =' + Edit8.Text);
   TempRequest.Params.Add ('value2 =' + Edit9.Text);
   TempRequest.ResponseContent.LineSeparator: = # 10;
   TempRequest.OnComplete: = RequestComplete;
   MyRequestQ.AddRequest (TempRequest);
end;

Reading the PDF:
TForm1.RequestComplete procedure (Request: TServerRequest);
begin
  if (Request.StatusCode = 200) then
    begin
      Plugin1.MimeType: = 'application / pdf';
      Plugin1.URL: = 'http://jalsoftware.sytes.net/pdfs/prueba.pdf';
      Plugin1.Visible: = true;
    end
  else
    EError.Create raise ('Response Error:' + Request.StatusText);
end;

The OnExecute Module:
TEWBModule1.EWBModuleExecute procedure (Request: TEWBServerRequest);
var
valu: Integer;
cont: String;
MyProject: TRaveProjectManager;
MyReport: TRaveReport;
MyPage: TRavePage;
MyText1: TRaveText;
MyText2: TRaveText;
begin
  RvProject1.open;
  MyProject: = RVProject1.Projman;
  MyReport: = RVProject1.Projman.FindRaveCOmponent ('Report1', nil) as TRaveReport;
  MyPage: = RVProject1.Projman.FindRaveComponent ('Page1' MyReport) as TRavePage;
  MyText1: = RVProject1.Projman.FindRaveComponent ('Text4' MyPage) as TRaveText;
  MyText1.Text: = Request.RequestParams.Values ['value1'];
  MyText2: = RVProject1.Projman.FindRaveComponent ('text5' MyPage) as TRaveText;
  MyText2.Text: = Request.RequestParams.Values ['value2'];

  RvSystem1.DefaultDest: = rdFile;
  RvSystem1.DoNativeOutput: = false;
  RvSystem1.RenderObject: = RvRenderPDF1;
  RvSystem1.OutputFileName: = 'd: \ EWBServer \ www \ images \ prueba.pdf';
  RVProject1.ExecuteReport ('Report1');
  valu: = 1;
  Request.ResponseHeaders.Add('Cache-Control: no-cache'); // Added line
  Request.SendCustomContent (IntToStr (valu),'','');
end;