# File lib/relevance/tarantula/rails_integration_proxy.rb, line 59
      def patch_response(url, response)
        if response.code == '404'
          if File.exist?(static_content_path(url))
            case ext = File.extension(url)
            when /html|te?xt|css|js|jpe?g|gif|psd|png|eps|pdf|ico/
              response.headers["type"] = "text/#{ext}"  # readable as response.content_type
              alter_response(response, '200', static_content_file(url))
            else
              log "Skipping unknown type #{url}"
            end
          end
        end
        # don't count on metaclass taking block, e.g.
        # http://relevancellc.com/2008/2/12/how-should-metaclass-work
        response.metaclass.class_eval do
          include Relevance::CoreExtensions::Response
        end
      end