How to pass variables from js to Ruby on Rails controller?

Question

Ruby on Rails

I'm trying to solve the problem of determining the user's geolocation to display the correct content.
I made the definition of the city by ip, but the accuracy suffers. There are 50 to 50 hits from computers, and 0 from mobile devices with 3G. As an option, I decided to add a city definition by coordinates (navigator.geolocation).
I did something like this in js

$(document).ready(function() {
  if(navigator.geolocation)
    navigator.geolocation.getCurrentPosition(function(position) {
      var latitude = position.coords.latitude;
      var longitude = position.coords.longitude;
    });
});

How can I pass latitude and longitude to the controller for further work. I want to substitute coordinates in geocoder to get the city.
Geocoder.search(latitude,longitude)

Answer 1

ajax + sessions?