Cut http://www. from request so browser URL shows just request.url (http://www.domain.com --> domain.com)

express-drop-httpwww.js

app.use(function(request, response, next) {
  var newHost = request.host.replace(/[http*:\\]*www./, '');
  if (request.host != newHost) {
    // 301 is a "Moved Permanently" redirect.
    res.redirect(301, request.protocol + "://" + newHost + request.url);
  } else {
    next();
  }
});