Getting your public IP with Nodejs using coffeescript and the result js file for reference (npm install --save coffee-script https)

whatismyip.coffee

https = require 'https'

https.get { host: 'api.ipify.org', path: '/?format=json' }, (res) ->
    console.log 'statusCode:', res.statusCode
    console.log 'content-type:', res.headers['content-type']
    data = ''
    res.on 'data', (chunk) ->
        data += chunk.toString()
    res.on 'end', () ->
        console.log 'publicIP:', JSON.parse(data)['ip']

whatismyip.js

// Generated by CoffeeScript 1.12.4
(function() {
  var https;

  https = require('https');

  https.get({
    host: 'api.ipify.org',
    path: '/?format=json'
  }, function(res) {
    var data;
    console.log('statusCode:', res.statusCode);
    console.log('content-type:', res.headers['content-type']);
    data = '';
    res.on('data', function(chunk) {
      return data += chunk.toString();
    });
    return res.on('end', function() {
      return console.log('publicIP:', JSON.parse(data)['ip']);
    });
  });

}).call(this);