# File lib/amazon/search/cache.rb, line 48
      def cached?(url)
        digest = Digest::MD5.hexdigest(url)

        cache_files = Dir.glob(File.join(@path, '*')).map do |d|
          File.basename(d)
        end

        return cache_files.include?(digest) &&
         (Time.now - File.mtime(File.join(@path, digest))) / ONE_DAY <= MAX_AGE
      end