func trimEventPrefix(ev *store.Event, prefix string) *store.Event {
if ev == nil {
return nil
}
// Since the *Event may reference one in the store history
// history, we must copy it before modifying
e := ev.Clone()
e.Node = trimNodeExternPrefix(e.Node, prefix)
e.PrevNode = trimNodeExternPrefix(e.PrevNode, prefix)
return e
}
// 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, 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)
return json.NewEncoder(w).Encode(ev)
}