Wait for a Socket to Become Readable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForReading, which waits for read-ready activity on the socket, or on any contained socket when the object is a socket set. It returns 1 if ready, 0 on timeout, or -1 on error.

var
success: Integer;
socket: TChilkatSocket;
bTls: Integer;
maxWaitMs: Integer;
ready: Integer;

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;

//  Wait up to 5 seconds for read-ready activity on the socket (or, for a socket set, on any contained
//  socket).  Returns 1 if ready, 0 on timeout, or -1 on error.
ready := socket.SelectForReading(5000);
if (ready < 0) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;
if (ready <> 1) then
  begin
    Memo1.Lines.Add('No data became available before the timeout.');
    Exit;
  end;
Memo1.Lines.Add('The socket has data ready to read.');