ディスパッチャーにレスポンスヘッダーをキャッシュさせる方法

   # Cache response headers next to a cached file. On the first request to
      # an uncached resource, all headers matching one of the values found here
      # are stored in a separate file, next to the cache file. On subsequent
      # requests to the cached resource, the stored headers are added to the
      # response.
      #
      # Note, that file globbing characters are not allowed here.
      #
      #/headers
      #  {
      #  "Cache-Control"
      #  "Content-Disposition"
      #  "Content-Type"
      #  "Expires"
      #  "Last-Modified"
      #  "X-Content-Type-Options"
      #  }