How do you change the Active Storage Service url_expires_in timeout?

Question

When Active Storage creates a signed variant URL, it sets a default timeout of 5.minutes. I really want to increase this, but I've been trawling Github issues, code diving and cannot find it anywhere. On line 44 of the services class a class_attribute is set, but how can this be overwritten?

https://github.com/rails/rails/blob/5-2-stable/activestorage/lib/active_storage/service.rb#L44

I'm using url_for to generate the signed variant links and there doesn't seem to be anyway to change the setting then. Any help would be greatly appreciated.

Thank you! :)

Answer 1

Set ActiveStorage::Service.url_expires_in directly, e.g. in an initializer:

# config/initializers/active_storage.rb
ActiveStorage::Service.url_expires_in = 1.hour

Rails 6 will add config.active_storage.service_urls_expire_in:

# config/initializers/active_storage.rb
Rails.application.config.active_storage.service_urls_expire_in = 1.hour