search_file

# File lib/webrick/httpservlet/filehandler.rb, line 348
      def search_file(req, res, basename)
        langs = @options[:AcceptableLanguages]
        path = res.filename + basename
        if File.file?(path)
          return basename
        elsif langs.size > 0
          req.accept_language.each{|lang|
            path_with_lang = path + ".#{lang}"
            if langs.member?(lang) && File.file?(path_with_lang)
              return basename + ".#{lang}"
            end
          }
          (langs - req.accept_language).each{|lang|
            path_with_lang = path + ".#{lang}"
            if File.file?(path_with_lang)
              return basename + ".#{lang}"
            end
          }
        end
        return nil
      end