Take a signed permanent reference for a blob representation and turn it into an expiring service URL for download. Note: These URLs are publicly accessible. If you need to enforce access protection beyond the security-through-obscurity factor of the signed blob and variation reference, you'll need to implement your own authenticated redirection controller.
# File activestorage/app/controllers/active_storage/representations_controller.rb, line 10 def show expires_in ActiveStorage::Blob.service.url_expires_in redirect_to @blob.representation(params[:variation_key]).processed.service_url(disposition: params[:disposition]) end
© 2004–2018 David Heinemeier Hansson
Licensed under the MIT License.