Putting a CDN in front of ActiveStorage

rubyonrails-talk
,
4

I haven’t tried this myself, but in 6.1 you can use the proxy I think. This doesn’t answer your question directly, but maybe helpful:

Put this into routes:

direct :cdn_proxy do |model, options|
    if model.respond_to?(:signed_id)
      route_for(
        :rails_service_blob_proxy,
        model.signed_id,
        model.filename,
        options.merge(host: Settings.asset_host)
      )
    else
      signed_blob_id = model.blob.signed_id
      variation_key  = model.variation.key
      filename       = model.blob.filename
      route_for(
        :rails_blob_representation_proxy,
        signed_blob_id,
        variation_key,
        filename,
        options.merge(host: Settings.asset_host)
      )
    end
  end

Put this into your environment files:

config.active_storage.resolve_model_to_route = :cdn_proxy

You can call the images as:

rails_storage_proxy_url # for the main attachments
rails_blob_representation_proxy_url # for the variants

Credit: Vito Botta