var err error
	a, err := os.Create("myarchive.zip")

	if err != nil {
		return err
	}
	arch := archive.NewZip(a)
	err = h.FilesToArchive(arch, in)
	if err != nil {
		return err
	}
	err = arch.Close()
	if err != nil {
		return err
	}
	a, err = os.Open("myarchive.zip")
	if err != nil {
		return err
	}
	w := protostream.NewWriter(out)
	_, err = io.Copy(w, a)
	return err