class ActiveStorage::Representations::ProxyController

Authenticated Controllers.
require a higher level of protection consider implementing
generated URLs are hard to guess, but permanent by design. If your files
WARNING: All Active Storage controllers are publicly accessible by default. The
Proxy files through application. This avoids having a redirect and makes files easier to cache.

def show 

def show
  http_cache_forever public: true do
    send_blob_stream @representation.image, disposition: params[:disposition]
  end
end