app/controllers/active_storage/representations/proxy_controller.rb



# frozen_string_literal: true

# Proxy files through application. This avoids having a redirect and makes files easier to cache.
class ActiveStorage::Representations::ProxyController < ActiveStorage::Representations::BaseController
  include ActiveStorage::SetHeaders

  def show
    http_cache_forever public: true do
      set_content_headers_from @representation.image
      stream @representation
    end
  end
end