Mongrel::DirHandler equivalent for Passenger

I'm using Mongrel::DirHandler to control response headers for static files - this works great on my dev machine. My production machine uses Passenger so my headers aren't getting set. How do I control headers for static files when using Passenger?

snippet from my environment.rb:

if defined? Mongrel::DirHandler
  module Mongrel
    class DirHandler
      def send_file_with_expires(req_path, request, response, header_only=false)

        if req_path =~ /((\/images)|javascripts|stylesheets)/
          response.header['Cache-Control'] = 'max-age=315360000'
          response.header['Expires'] = (Time.now + 10.years).rfc2822
        else
          response.header["Last-Modified"] = Time.now.httpdate
          response.header["Expires"] = 0
          # HTTP 1.0
          response.header["Pragma"] = 'no-cache'
          # HTTP 1.1 ‘pre-check=0, post-check=0′ (IE specific)
          response.header["Cache-Control"] = 'no-store, no-cache, must-revalidate, max-age=0, pre-check=0, post-check=0'
        end

        send_file_without_expires(req_path, request, response, header_only)
      end
      alias_method :send_file_without_expires, :send_file
      alias_method :send_file, :send_file_with_expires
    end
  end
end

From stackoverflow Andy Gaskell

• Since you're using Passenger, I assume you're under apache, so your request isn't going through Mongrel anymore. If so, you can establish rules on the .htaccess file inside the public directory of your application.

  Here's an explination on how to do it.

  From changelog