new

# File actionpack/lib/action_controller/caching/actions.rb, line 140
        def initialize(controller, options = {}, infer_extension = true)
          if infer_extension
            extract_extension(controller.request)
            options = options.reverse_merge(:format => @extension) if options.is_a?(Hash)
          end

          path = controller.url_for(options).split('://').last
          normalize!(path)
          add_extension!(path, @extension)
          @path = URI.unescape(path)
        end