Redirect http request to https in nodejs

I am trying to redirect my http page to https, I found some discussion already there in stackoverflow How to force SSL / https in Express.js. But now http = express.createServer() has become deprecated. So I was trying to do as below:

var http = require("http")
  , https = require("https");

var app = express();

/* If I use below it gives ECONNREFUSED error */
http.get('*', function(req, res) {
  var path = req.headers.host;
  var pos = path.indexOf(':');
  res.redirect('https://' + path.substr(0, pos) + ':' + String(app.get('port')));
});

app.get('/', function(req, res) {
 //Something 
});

https.createServer(options, app).listen(8000, function(){
  console.log("In Https");
});

http.createServer(app).listen(9000, function() {
  console.log("In http");
});

Can you please let me know why this error comes here? (ECONNREFUSED) What I should modify to get it worked, http redirect to https?

Regards, -M-