const express = require('express');
const http = require('http');
const url = require('url');
const WebSocket = require('ws');
 
const app = express();
 
app.use(function (req, res) {
  res.send({ msg: "hello" });
});
 
const server = http.createServer(app);
const wss = new WebSocket.Server({ server });
 
wss.on('connection', function connection(ws, req) {
  const location = url.parse(req.url, true);

  ws.on('message', function incoming(message) {
    console.log('received: %s', message);
    ws.send('test');
  });
 
  //ws.send('test');
});
 
server.listen(3001, function listening() {
  console.log('Listening on %d', server.address().port);
});