Heroku, Rails 4, and Rack::Cors

Question

I am trying to use Rack::Cors with my Rails 4 application so that I can do a JSON based API.

CORS is in my Gemfile like this:

gem \'rack-cors\', :req         


        

Answer 1

I ran into the same problem with heroku. I found this blog with the same rack-cors issue.

Just moved the use Rack::Cors to config.ru, redeployed to heroku and it works.

require ::File.expand_path('../config/environment',  __FILE__)
run Rails.application

require 'rack/cors'
use Rack::Cors do

  # allow all origins in development
  allow do
    origins '*'
    resource '*', 
        :headers => :any, 
        :methods => [:get, :post, :delete, :put, :options]
  end
end