# File lib/locale/driver/cgi.rb, line 62
     def charset
       req = Thread.current[:current_request]
       return nil unless req

       charsets = req[:accept_charset]
       if charsets and charsets.size > 0
         num = charsets.index(',')
         charset = num ? charsets[0, num] : charsets
         charset = nil if charset == "*"
       else
         charset = nil
       end
       charset
     end