fastly_assets_provider.rb

class FastlyAssetsProvider
  include Roadie::AssetProvider

  def find_stylesheet(name)
    Rails.logger.info("## FastlyAssetsProvider retrieving asset named: #{name}")
    asset_host = Rails.application.config.action_mailer.asset_host
    return nil unless asset_host.present?

    uri = URI(name)
    uri.scheme = 'https'
    response = URI.parse(uri.to_s).read

    Roadie::Stylesheet.new(name, response)
  rescue OpenURI::HTTPError
  rescue NoMethodError
    nil
  end
end