Exemple #1
0
func mustParseMemberIDFromKey(key string) types.ID {
	id, err := types.IDFromString(path.Base(key))
	if err != nil {
		plog.Panicf("unexpected parse member id error: %v", err)
	}
	return id
}
Exemple #2
0
func getID(p string, w http.ResponseWriter) (types.ID, bool) {
	idStr := trimPrefix(p, membersPrefix)
	if idStr == "" {
		http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
		return 0, false
	}
	id, err := types.IDFromString(idStr)
	if err != nil {
		writeError(w, nil, httptypes.NewHTTPError(http.StatusNotFound, fmt.Sprintf("No such member: %s", idStr)))
		return 0, false
	}
	return id, true
}
Exemple #3
0
func (h *streamHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	if r.Method != "GET" {
		w.Header().Set("Allow", "GET")
		http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
		return
	}

	w.Header().Set("X-Server-Version", version.Version)
	w.Header().Set("X-Etcd-Cluster-ID", h.cid.String())

	if err := checkClusterCompatibilityFromHeader(r.Header, h.cid); err != nil {
		http.Error(w, err.Error(), http.StatusPreconditionFailed)
		return
	}

	var t streamType
	switch path.Dir(r.URL.Path) {
	// backward compatibility
	case RaftStreamPrefix:
		t = streamTypeMsgApp
	case path.Join(RaftStreamPrefix, string(streamTypeMsgApp)):
		t = streamTypeMsgAppV2
	case path.Join(RaftStreamPrefix, string(streamTypeMessage)):
		t = streamTypeMessage
	default:
		plog.Debugf("ignored unexpected streaming request path %s", r.URL.Path)
		http.Error(w, "invalid path", http.StatusNotFound)
		return
	}

	fromStr := path.Base(r.URL.Path)
	from, err := types.IDFromString(fromStr)
	if err != nil {
		plog.Errorf("failed to parse from %s into ID (%v)", fromStr, err)
		http.Error(w, "invalid from", http.StatusNotFound)
		return
	}
	if h.r.IsIDRemoved(uint64(from)) {
		plog.Warningf("rejected the stream from peer %s since it was removed", from)
		http.Error(w, "removed member", http.StatusGone)
		return
	}
	p := h.peerGetter.Get(from)
	if p == nil {
		// This may happen in following cases:
		// 1. user starts a remote peer that belongs to a different cluster
		// with the same cluster ID.
		// 2. local etcd falls behind of the cluster, and cannot recognize
		// the members that joined after its current progress.
		plog.Errorf("failed to find member %s in cluster %s", from, h.cid)
		http.Error(w, "error sender not found", http.StatusNotFound)
		return
	}

	wto := h.id.String()
	if gto := r.Header.Get("X-Raft-To"); gto != wto {
		plog.Errorf("streaming request ignored (ID mismatch got %s want %s)", gto, wto)
		http.Error(w, "to field mismatch", http.StatusPreconditionFailed)
		return
	}

	w.WriteHeader(http.StatusOK)
	w.(http.Flusher).Flush()

	c := newCloseNotifier()
	conn := &outgoingConn{
		t:       t,
		termStr: r.Header.Get("X-Raft-Term"),
		Writer:  w,
		Flusher: w.(http.Flusher),
		Closer:  c,
	}
	p.attachOutgoingConn(conn)
	<-c.closeNotify()
}