!752

p-substance {
  final JTextField tf1 = jTextField("localhost");
  final JTextField tf2 = jTextField("4999");
  showForm(
    "Host", tf1,
    "Port", tf2, r-thread {
      connect(getTextTrim(tf1), parseInt(getTextTrim(tf2)));
    });
}

svoid connect(S host, int port) {
  print("Connecting to " + host + ":" + port + "...");
  final DialogIO io = talkTo(host, port);
    
  // output
  thread {
    S line;
    while ((line = readLine()) != null)
      io.sendLine(line);
  }
  
  // input
  while (io.isStillConnected()) {
    if (io.waitForLine()) {
      S line = io.readLineNoBlock();
      print("> " + line);
    }
  }
  
  print();
  print("[logout]");
}

Began life as a copy of #1001077