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Finds a representation by a signed_id and a variation_key, and redirects to a representation’s expiring service URL.

The +signed_id+s make URLs hard to guess but permanent by design, allowing the URLs to be cached.

The URLs created for this controller are set to never expire by default. To make URLs expire, pass the expires_in option when generating the URL:

rails_storage_redirect_url(representation, expires_in: 1.minute)

Or set the default for all Active Storage URLs:

config.active_storage.urls_expire_in = 1.day

The service URLs are set to expire in 5 minutes by default. The default can be changed for all service URLs:

config.active_storage.service_urls_expire_in = 1.hour

WARNING: All Active Storage controllers are publicly accessible by default. Anyone who knows the URL can access the file, even if the rest of your application requires authentication. If your files require access control consider implementing Authenticated Controllers.

Methods
S

Instance Public methods

show()

Source: show | on GitHub 

# File activestorage/app/controllers/active_storage/representations/redirect_controller.rb, line 27
def show
  expires_in ActiveStorage.service_urls_expire_in
  redirect_to @representation.url(disposition: params[:disposition]), allow_other_host: true
end