Allow multiple access control requests for Rails

If you have problem with sending XHR requests from different domains, you find trouble to get content, because

XMLHttpRequest cannot load http://different.domain.local:3000/visits. Origin http://localhost:3000 is not allowed by Access-Control-Allow-Origin.

The solution is to setup response headers: Access-Control-Request-Method, Access-Control-Allow-Origin.

1 headers['Access-Control-Allow-Origin'] = '*'
2 headers['Access-Control-Request-Method'] = '*'

Example for rails:

1 #app/application_controller.rb
2 after_filter :set_access_control_headers
3 
4 def set_access_control_headers
5   headers['Access-Control-Allow-Origin'] = '*'
6   headers['Access-Control-Request-Method'] = '*'
7 end