SSL Certificate generation & websockets

app.js

var fs = require('fs');

var options = {
  key: fs.readFileSync('key.pem'),
  cert: fs.readFileSync('cert.pem')
};

var app = require('https').createServer(options);
var io = require('socket.io')(app);

var queryfile = 'data.query';

io.on('connection', function(socket) {
    console.log('user connected');

    var fileHandler = function() {
        fs.readFile(queryfile, 'utf8', function(error, data) {
            if(error) {
                console.log(error);
            }
            socket.emit('server', data);
        });
    };

    fs.watchFile(queryfile, fileHandler);

    socket.on('client', function(data) {
        console.log(data);
    });
});

app.listen(3000, function() {
    console.log("listening on 3000");
});

client.js

var script = document.createElement('script');
script.setAttribute('type', 'text/javascript');
script.setAttribute('src', 'https://cdn.socket.io/socket.io-1.2.0.js');
document.body.appendChild(script);

var socket = io.connect('http://localhost:3000');
socket.on('server', function(data) {
  console.log(data);
});

openssl

#http://stackoverflow.com/questions/10175812/how-to-create-a-self-signed-certificate-with-openssl

$> openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 1001

// to avoid typing the password repeatedly do the following

$> openssl rsa -in key.pem -out newkey.pem