How to enable CORS in Rails 4 App

Question

I\'m just about to pull my hair out... I\'ve been trying to enable CORS in this Rails app since the morning and it just doesn\'t work. I\'ve tried this, using Rack Cors Gem

Answer 1

You should use rack cors

It provides a nice DSL, to use in your config/application.rb, instead of the messy header work and before filters.

A very permissive would be as follows, but of course, you'll have to tailor it a bit.

use Rack::Cors do
  allow do
    origins '*'
    resource '*', headers: :any, methods: :any
  end  
end