# File lib/cgikit/handler.rb, line 329
    def session_id( request )
      sid_query = session_id_from_query(request)
      sid_cookie = session_id_from_cookie(request)
      if @application.store_in_cookie and sid_cookie then
        sid_cookie
      elsif sid_query then
        sid_query
      else
        nil
      end
    end