websocket express server client example

cli.js

const WebSocket = require('ws');

const ws = new WebSocket('ws://localhost:3000/');

ws.on('open', function open() {
  ws.send('sent by client');
});

ws.on('message', function incoming(data) {
  console.log('received @client', data);
});

install.sh

npm i express express-ws ws

srv.js

var express = require('express');
var app = express();
var expressWs = require('express-ws')(app);

app.use(function (req, res, next) {
  console.log('middleware');
  req.testing = 'testing';
  return next();
});

app.get('/', function(req, res, next){
  console.log('get route', req.testing);
  res.end();
});

app.ws('/', function(ws, req) {
  ws.on('message', function(msg) {
    console.log('received @server', msg);
	ws.send('sent by server');
  });
  console.log('socket', req.testing);
});

app.listen(3000);