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

Rack::Cors provides support for Cross-Origin Resource Sharing

Steps to enable rackcors :

1.add gem to your Gemfile:

gem 'rack-cors'

2.Add below code to config/application.rb

# if you are using Rails 3/4
config.middleware.insert_before 0, "Rack::Cors" do
  allow do
    origins '*'
    resource '*', :headers => :any, :methods => :any
  end
end
# if you are using Rails 5

config.middleware.insert_before 0, Rack::Cors do
  allow do
    origins '*'
    resource '*', headers: :any, methods: :any
  end
end