Geolocation in Total.js

// Temporary cache
var CACHE = {};

F.middleware('geolocation', function(req, res, next) {

    if (CACHE[req.ip] !== undefined) {
        req.geolocation = CACHE[req.ip];
        next();
        return;
    }

    var builder = new RESTBuilder();
    builder.url('https://freegeoip.net/json/' + req.ip);
    builder.get();
    builder.exec(function(err, response) {
        CACHE[req.ip] = req.geolocation = err ? null : response;
        next();
    });
});

Controller.prototype.geolocation = function() {
    return this.req.geolocation;
};

// Clears cache every 10 minutes
F.on('service', function(counter) {
    if (counter % 10 === 0)
        CACHE = {};
});

exports.install = function() {
    F.route('/', view_index, ['#geolocation']);
};

function view_homepage() {

    console.log(this.geolocation());
    // or
    console.log(this.req.geolocation);

    this.view('index');
}

{ ip: '62.168.127.195',
  country_code: 'SK',
  country_name: 'Slovak Republic',
  region_code: '',
  region_name: '',
  city: '',
  zip_code: '',
  time_zone: 'Europe/Bratislava',
  latitude: 48.6667,
  longitude: 19.5,
  metro_code: 0 }