Accept the Next Incoming Connection

See more Socket/SSL/TLS Examples

Demonstrates Socket.AcceptNext, which waits for and accepts the next incoming connection on a listening socket, delivering it as a new connected Socket.

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.Socket;

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

procedure RunDemo;
var
  success: Boolean;
  socket: TSocket;
  connectedSock: TSocket;

begin
  success := False;

  socket := TSocket.Create;

  success := socket.BindAndListen(5000,25);
  if (success = False) then
    begin
      WriteLn(socket.LastErrorText);
      Exit;
    end;

  //  Wait for and accept the next incoming connection on the listening socket.  maxWaitMs = 0 waits
  //  indefinitely; a positive value waits up to that many milliseconds.  For a TLS listener, acceptance
  //  includes the server-side TLS handshake.
  connectedSock := TSocket.Create;
  success := socket.AcceptNext(20000,connectedSock);
  if (success = False) then
    begin
      WriteLn(socket.LastErrorText);
      Exit;
    end;
  WriteLn('Accepted a connection from ' + connectedSock.RemoteIpAddress);


  socket.Free;
  connectedSock.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.