func (vs *VolumeServer) publicReadOnlyHandler(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case "GET":
		stats.ReadRequest()
		vs.GetOrHeadHandler(w, r)
	case "HEAD":
		stats.ReadRequest()
		vs.GetOrHeadHandler(w, r)
	}
}
func (vs *VolumeServer) privateStoreHandler(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case "GET":
		stats.ReadRequest()
		vs.GetOrHeadHandler(w, r)
	case "HEAD":
		stats.ReadRequest()
		vs.GetOrHeadHandler(w, r)
	case "DELETE":
		stats.DeleteRequest()
		vs.guard.WhiteList(vs.DeleteHandler)(w, r)
	case "PUT":
		stats.WriteRequest()
		vs.guard.WhiteList(vs.PostHandler)(w, r)
	case "POST":
		stats.WriteRequest()
		vs.guard.WhiteList(vs.PostHandler)(w, r)
	}
}