Delphi ActiveX

Send BinData Contents over a Socket

Demonstrates Socket.SendBd, which sends bytes from a BinData beginning at an offset. A numBytes of 0 sends from the offset through the end of the data.

Background. The BinData receive methods accumulate raw bytes in a BinData object. A single receive returns only what is currently available, whereas the counted receive waits for an exact number of bytes.

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Delphi ActiveX

var
success: Integer;
socket: TChilkatSocket;
bTls: Integer;
maxWaitMs: Integer;
bd: TChilkatBinData;

begin
success := 0;

socket := TChilkatSocket.Create(Self);

//  Connect to the server using TLS.
bTls := 1;
maxWaitMs := 5000;
success := socket.Connect('example.com',5000,bTls,maxWaitMs);
if (success = 0) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

//  Place some bytes into a BinData to be sent.
bd := TChilkatBinData.Create(Self);
bd.AppendString('message payload','utf-8');

//  Send bytes from the BinData starting at the given offset.  A numBytes of 0 sends from the offset
//  through the end of the data.
success := socket.SendBd(bd.ControlInterface,0,0);
if (success = 0) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('Sent ' + IntToStr(bd.NumBytes) + ' bytes.');