Nodejs Socket and redis example

nodeSocketRedisExample.txt

1. Install dependencies:
  npm install express socket.io redis
 
 2. Nodejs Code: 
 
const express = require('express');
const http = require('http');
const socketIo = require('socket.io');
const redis = require('redis');

const app = express();
const server = http.createServer(app);
const io = socketIo(server);

const redisClient = redis.createClient();

io.on('connection', (socket) => {
  console.log('New client connected');

  socket.on('message', (msg) => {
    redisClient.publish('chat', msg);
  });

  redisClient.subscribe('chat');
  redisClient.on('message', (channel, message) => {
    socket.emit('message', message);
  });

  socket.on('disconnect', () => {
    console.log('Client disconnected');
  });
});

server.listen(3000, () => {
  console.log('Server listening on port 3000');
});