Make csrf work for angular

twilio/app/controllers/application_controller.rb

   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
+
+  after_filter :set_csrf_cookie_for_ng
+  def set_csrf_cookie_for_ng
+    cookies['XSRF-TOKEN'] = form_authenticity_token if protect_against_forgery?
+  end
+
+  protected
+
+  def verified_request?
+    super || form_authenticity_token == request.headers['X-XSRF-TOKEN']
+  end
 end