Direct link (no redirect) to files in ActiveStorage

Question

Using url_for() on a file stored in active storage returns a url that leads to the application and then redirects to the actual location. Because of a bug in firefox with CORS, the redirect breaks my application.

Is there any way to get the direct link to the file with ActiveStorage?

Answer 1

You can do this

record.active_storage_object.blob.service_url

Found here https://github.com/rails/rails/blob/master/activestorage/app/controllers/active_storage/blobs_controller.rb

Answer 2

I had to dig through the rails source to create this so I have no idea how recommended it is but this works for disk storage at least.

ActiveStorage::Current.host = "yourhostname"
attachment_blob = ActiveStorage::Attachment.find_by(record_type: "YourModel", record_id: record.id).blob
direct_url = ActiveStorage::Blob.service.url(
    attachment_blob.key,
    expires_in: 20000,
    disposition: "attachment",
    filename: attachment_blob.filename,
    content_type: attachment_blob.content_type
)