Express vhosting

app.js

var express = require('express');

var app   = express();
var app2  = express();

app.use(express.vhost('app1.example.com', require('./app1').app));
app.use(express.vhost('app2.example.com', app2));

app2.get('/', function(req, res) {
  res.send('app 2');
});

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

app.listen(3012);

app1.js

var express = require('express');
var app     = express();

app.get('*', function(req, res) {
  res.send('app 1');
});

exports.app = app;