# File lib/rack/protection.rb, line 23
    def self.new(app, options = {})
      # does not include: RemoteReferrer, AuthenticityToken and FormToken
      except = Array options[:except]
      use_these = Array options[:use]

      if options.fetch(:without_session, false)
        except += [:session_hijacking, :remote_token]
      end

      Rack::Builder.new do
        # Off by default, unless added
        use ::Rack::Protection::AuthenticityToken,     options if use_these.include? :authenticity_token
        use ::Rack::Protection::CookieTossing,         options if use_these.include? :cookie_tossing
        use ::Rack::Protection::ContentSecurityPolicy, options if use_these.include? :content_security_policy
        use ::Rack::Protection::FormToken,             options if use_these.include? :form_token
        use ::Rack::Protection::RemoteReferrer,        options if use_these.include? :remote_referrer
        use ::Rack::Protection::StrictTransport,       options if use_these.include? :strict_transport

        # On by default, unless skipped
        use ::Rack::Protection::FrameOptions,          options unless except.include? :frame_options
        use ::Rack::Protection::HttpOrigin,            options unless except.include? :http_origin
        use ::Rack::Protection::IPSpoofing,            options unless except.include? :ip_spoofing
        use ::Rack::Protection::JsonCsrf,              options unless except.include? :json_csrf
        use ::Rack::Protection::PathTraversal,         options unless except.include? :path_traversal
        use ::Rack::Protection::RemoteToken,           options unless except.include? :remote_token
        use ::Rack::Protection::SessionHijacking,      options unless except.include? :session_hijacking
        use ::Rack::Protection::XSSHeader,             options unless except.include? :xss_header
        run app
      end.to_app
    end