WebSockets server tutorial

server.js

socket.on('data', buffer => {
  const message = parseMessage(buffer);
  if (message) {
    // For our convenience, so we can see what the client sent
    console.log(message);
    // We'll just send a hardcoded message in this example 
    socket.write(constructReply({ message: 'Hello from the server!' })); 
  } else if (message === null) { 
    console.log('WebSocket connection closed by the client.'); 
  }
});