mqtt和socket.io实现socket互通

var express = require('express')

, routes = require('./routes')

, http = require('http')

, path = require('path')

, socketio = require('socket.io')

, mqtt = require('mqtt');

// Express server

var app = express();

// Http server

var server = http.createServer(app);

// Socket.io

var io = socketio.listen(server);

// all environments

app.set('port', process.env.PORT || 3000);

app.set('views', __dirname + '/views');

app.set('view engine', 'jade');

app.use(express.favicon());

app.use(express.logger('dev'));

app.use(express.bodyParser());

app.use(express.methodOverride());

app.use(app.router);

app.use(express.static(path.join(__dirname, 'public')));

// development only

if ('development' == app.get('env')) {

app.use(express.errorHandler());

}

app.get('/', routes.index);

io.sockets.on('connection', function(socket) {

var client = mqtt.createClient();

socket.on('publish', function(topic, message) {

client.publish(topic, message);

});

socket.on('subscribe', function (topic) {

client.subscribe(topic);

});

client.on('message', function(topic, message) {

socket.emit('message', topic, message);

});

});

server.listen(app.get('port'));     一篇好的git共享代码： https://github.com/adamvr/bearded-dangerzone/blob/master/app.js