func trimEventPrefix(ev *store.Event, prefix string) *store.Event {
if ev == nil {
return nil
}
ev.Node = trimNodeExternPrefix(ev.Node, prefix)
ev.PrevNode = trimNodeExternPrefix(ev.PrevNode, prefix)
return ev
}
// writeKeyEvent trims the prefix of key path in a single Event under
// StoreKeysPrefix, serializes it and writes the resulting JSON to the given
// ResponseWriter, along with the appropriate headers.
func writeKeyEvent(w http.ResponseWriter, ev *store.Event, noValueOnSuccess bool, rt etcdserver.RaftTimer) error {
if ev == nil {
return errors.New("cannot write empty Event!")
}
w.Header().Set("Content-Type", "application/json")
w.Header().Set("X-Etcd-Index", fmt.Sprint(ev.EtcdIndex))
w.Header().Set("X-Raft-Index", fmt.Sprint(rt.Index()))
w.Header().Set("X-Raft-Term", fmt.Sprint(rt.Term()))
if ev.IsCreated() {
w.WriteHeader(http.StatusCreated)
}
ev = trimEventPrefix(ev, etcdserver.StoreKeysPrefix)
if noValueOnSuccess &&
(ev.Action == store.Set || ev.Action == store.CompareAndSwap ||
ev.Action == store.Create || ev.Action == store.Update) {
ev.Node = nil
ev.PrevNode = nil
}
return json.NewEncoder(w).Encode(ev)
}