http-show-interfaces.js

// reference http://stackoverflow.com/questions/3653065/get-local-ip-address-in-node-js

var express = require('express');
var app = express();
var os = require('os');
var ifaces = os.networkInterfaces();

app.get('/', function (req, res) {
  res.send('Hello World!');
});
var server = app.listen(3000, function () {
  var host = server.address().address;
  var port = server.address().port;

  Object.keys(ifaces).forEach(function (ifname) {
    ifaces[ifname].forEach(function (iface) {
      if ('IPv4' !== iface.family ) {
        // skip over non-ipv4 addresses
        return;
      }

      console.log('Example app listening at', iface.address + ":" + port);
    });
  });

});

// OUTPUT
/*
➜  test  node app.js
Example app listening at 127.0.0.1:3000
Example app listening at 192.168.1.176:3000


*/