Pascal (Lazarus/Delphi)

Send Bytes on a Socket Connection

See more Socket/SSL/TLS Examples

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

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.BinData,
  Chilkat.Socket;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  socket: TSocket;
  ssl: Boolean;
  maxWaitMillisec: Integer;
  port: Integer;
  bd: TBinData;

begin
  success := False;

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

  socket := TSocket.Create;

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

  //  We wish to send a 0x00 byte followed by the us-ascii string "10800"
  bd := TBinData.Create;

  bd.AppendByte(0);
  bd.AppendString('10800','utf-8');

  //  Send the entire contents of bd.
  success := socket.SendBd(bd,0,0);
  if (success <> True) then
    begin
      WriteLn(socket.LastErrorText);
      Exit;
    end;


  socket.Free;
  bd.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.