const PORT=12321;
pipe:=Thread.Pipe(); // how server tells thread to connect to user

fcn echo(socket){		// a thread, one per connection
   text:=Data();
   while(t:=socket.read()){
      text.append(t);
      if(text.find("\n",text.cursor)){ text.readln().print(); }
   }
   // socket was closed
}

   // Set up the server socket.
server:=Network.TCPServerSocket.open(PORT);
println("Listening on %s:%s".fmt(server.hostname,server.port));
server.listen(echo.launch);  // Main event loop