delphi - Http Post with indy

Question

I have a simple php script on my web server which I need to upload a file using HTTP POST, which I am doing in Delphi.

Here is my code with Indy but aparantely it won't work and I can't figure out what i am not doing properly. How can I view what I send on the server is there such a tool ?

procedure TForm1.btn1Click(Sender: TObject);
var
  fname : string;
  MS,dump : TMemoryStream;
  http  : TIdHTTP;

const
  CRLF = #13#10;
begin
  if PromptForFileName(fname,'','','','',false) then
  begin
    MS := TMemoryStream.Create();
    MS.LoadFromFile(fname);
    dump := TMemoryStream.Create();
    http := TIdHTTP.Create();
    http.Request.ContentType:='multipart/form-data;boundary =-----------------------------7cf87224d2020a';
    fname := CRLF + '-----------------------------7cf87224d2020a' + CRLF + 'Content-Disposition: form-data; name="uploadedfile";filename="test.png"' + CRLF;
    dump.Write(fname[1],Length(fname));
    dump.Write(MS.Memory^,MS.Size);
    fname := CRLF + '-----------------------------7cf87224d2020a--' + CRLF;
    dump.Write(fname[1],Length(fname));
    ShowMessage(IntToStr(dump.Size));
    MS.Clear;
    try
    http.Request.Method := 'POST';
    http.Post('http://posttestserver.com/post.php',dump,MS);
    ShowMessage(PAnsiChar(MS.Memory));
    ShowMessage(IntToStr(http.ResponseCode));
    except
    ShowMessage('Could not bind socket');
    end;
  end;
end;

Answer 1

Indy has TIdMultipartFormDataStream for this purpose:

procedure TForm1.SendPostData;
var
  Stream: TStringStream;
  Params: TIdMultipartFormDataStream;
begin
  Stream := TStringStream.Create('');
  try
   Params := TIdMultipartFormDataStream.Create;
   try
    Params.AddFile('File1', 'C:est.txt','application/octet-stream');
    try
     HTTP.Post('http://posttestserver.com/post.php', Params, Stream);
    except
     on E: Exception do
       ShowMessage('Error encountered during POST: ' + E.Message);
    end;
    ShowMessage(Stream.DataString);
   finally
    Params.Free;
   end;
  finally
   Stream.Free;
  end;
end;