Parse response headers of an HTML request in rails controller

Question

Is it possible to access response headers of an HTML request sent to the browser via ruby (in controllers)?

What I am doing? I am trying to authenticate a login request using devise and devise-jwt in a rails app. After successful authentication I am assigned an Authorization token in response headers and redirected to a after_sign_in_path. Now on browser I can see the token being received, however I also need the same token issued in the controller action before it goes to the browser.

Upon parsing/logging response headers(response.headers) in the controller action(responsible for rendering the same view), i don't see Authorization key at all.

Alternative: Tried using javascript but as it turns out you can only parse response headers of a request initiated by javascript. This link states the same

Is there a way i can achieve this and not resort to using ajax request method?

Answer 1

An ActionCongtroller::Base#response object is created by Rails and contains all the information of the HTTP response being built by the controller. This is an instance of ActionDispatch::Response. There are various methods for accessing and interacting with the response headers. response.headers is where you would want to add custom response data.