Take a signed permanent reference for a blob and turn it into an expiring service URL for download.
WARNING: All Active Storage controllers are publicly accessible by default. The generated URLs are hard to guess, but permanent by design. If your files require a higher level of protection consider implementing Authenticated Controllers.
Instance Public methods
# File activestorage/app/controllers/active_storage/blobs/redirect_controller.rb, line 12 def show expires_in ActiveStorage.service_urls_expire_in redirect_to @blob.url(disposition: params[:disposition]), allow_other_host: true end