(Delphi DLL) Send Bytes on a Socket Connection

Demonstrates how to send a mixture of binary (non-text) and text bytes on a socket connection.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, BinData, Socket;

...

procedure TForm1.Button1Click(Sender: TObject);
var
socket: HCkSocket;
ssl: Boolean;
maxWaitMillisec: Integer;
port: Integer;
success: Boolean;
bd: HCkBinData;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

socket := CkSocket_Create();

// Connect to some host:port
ssl := False;
maxWaitMillisec := 20000;
port := 5555;
success := CkSocket_Connect(socket,'test.com',port,ssl,maxWaitMillisec);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

// We wish to send a 0x00 byte followed by the us-ascii string "10800"
bd := CkBinData_Create();

CkBinData_AppendByte(bd,0);
CkBinData_AppendString(bd,'10800','utf-8');

// Send the entire contents of bd.
success := CkSocket_SendBd(socket,bd,0,0);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

CkSocket_Dispose(socket);
CkBinData_Dispose(bd);

end;