# File lib/rack/utils.rb, line 182
    def best_q_match(q_value_header, available_mimes)
      values = q_values(q_value_header)

      values.map do |req_mime, quality|
        match = available_mimes.first { |am| Rack::Mime.match?(am, req_mime) }
        next unless match
        [match, quality]
      end.compact.sort_by do |match, quality|
        (match.split('/', 2).count('*') * -10) + quality
      end.last.first
    end