# File lib/omniauth/strategies/open_id.rb, line 48
      def dummy_app
        lambda{|env| [401, {"WWW-Authenticate" => Rack::OpenID.build_header(
          :identifier => identifier,
          :return_to => callback_url,
          :required => @options[:required],
          :optional => @options[:optional],
          :method => 'post'
        )}, []]}
      end