jedahan/server.js

## gistfile1.txt
<style>
   body { background: #333355; }
   body.connected { background: #620042; }
</style>
<script src="/socket.io/socket.io.js"></script>
<body>
<script>
  var socket = io();
  socket.on('change', function(val){
    console.log('change ', val);
    console.log('we got a change event');
      if(val===1){
        document.getElementsByTagName('body')[0].style.backgroundColor="#336633";
      } else {
        document.getElementsByTagName('body')[0].style.backgroundColor="#ff00ff";
      }
    });
</script>
</body>

## server.js
var gpio = require("gpio");

var gpio4 = gpio.export(4, {
   direction: "in",
   ready: function() {
     console.log('gpio has been exported');
   }
});

var sockets = [];

console.log('woohoo');

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

gpio4.on("change", function(val) {
  console.log("CHANGE", val);
  for(var i=0; i<sockets.length; i++){
    sockets[i].emit('change',val);
  }
});

app.get('/', function(req, res){
  res.sendfile('index.html');
});

io.on('connection', function(socket){
  socket.on('hi',function(val){
    console.log(val);
  });
  sockets.push(socket);
  console.log('a user connected');
    socket.emit('hi','world');
});

http.listen(3000, function(){
  console.log('listening on *:3000');
});
	<style>
	body { background: #333355; }
	body.connected { background: #620042; }
	</style>
	<script src="/socket.io/socket.io.js"></script>
	<body>
	<script>
	var socket = io();
	socket.on('change', function(val){
	console.log('change ', val);
	console.log('we got a change event');
	if(val===1){
	document.getElementsByTagName('body')[0].style.backgroundColor="#336633";
	} else {
	document.getElementsByTagName('body')[0].style.backgroundColor="#ff00ff";
	}
	});
	</script>
	</body>
	var gpio = require("gpio");

	var gpio4 = gpio.export(4, {
	direction: "in",
	ready: function() {
	console.log('gpio has been exported');
	}
	});

	var sockets = [];

	console.log('woohoo');

	var app = require('express')();
	var http = require('http').Server(app);
	var io = require('socket.io')(http);

	gpio4.on("change", function(val) {
	console.log("CHANGE", val);
	for(var i=0; i<sockets.length; i++){
	sockets[i].emit('change',val);
	}
	});

	app.get('/', function(req, res){
	res.sendfile('index.html');
	});

	io.on('connection', function(socket){
	socket.on('hi',function(val){
	console.log(val);
	});
	sockets.push(socket);
	console.log('a user connected');
	socket.emit('hi','world');
	});

	http.listen(3000, function(){
	console.log('listening on *:3000');
	});