Files
netbird/client/server/status_stream.go
Zoltán Papp 88a2bf582d [client] Push-based status stream for the Wails UI
Adds a SubscribeStatus gRPC RPC that pushes a fresh FullStatus snapshot
on every peer-recorder state change, replacing the Wails UI's 2-second
Status poll. The daemon's notifier already triggers on Connected /
Disconnected / Connecting / management or signal flip / address
change / peers-list change; we now coalesce those into ticks on a
buffered chan and stream the resulting snapshots over gRPC.

- Status recorder gains SubscribeToStateChanges /
  UnsubscribeFromStateChanges + a non-blocking notifyStateChange that
  drops ticks when a subscriber's 1-slot buffer is full (next snapshot
  the consumer pulls already reflects everything).
- Server.Status handler split: the snapshot composition is shared
  with the new SubscribeStatus stream handler so unary and stream
  paths return identical bytes.
- UI peers service: pollLoop replaced by statusStreamLoop. The local
  name of the existing SubscribeEvents loop is now toastStreamLoop so
  the two streams are easy to tell apart — the underlying RPC name is
  unchanged.
- Tray applyStatus skips the icon refresh when connected/lastStatus
  hasn't changed; rapid SubscribeStatus bursts during health probes
  no longer churn Shell_NotifyIcon or the log.
2026-04-30 11:45:43 +02:00

58 lines
1.7 KiB
Go

package server
import (
log "github.com/sirupsen/logrus"
"github.com/netbirdio/netbird/client/proto"
)
// SubscribeStatus pushes a fresh StatusResponse on every connection state
// change. The first message is the current snapshot, so a re-subscribing
// client doesn't need to also call Status. Subsequent messages fire when
// the peer recorder reports any of: connected/disconnected/connecting,
// management or signal flip, address change, or peers list change.
//
// The change channel coalesces bursts to a single tick. If the consumer
// is slow the daemon drops extras (not blocks), and the next snapshot
// the consumer pulls already reflects everything.
func (s *Server) SubscribeStatus(req *proto.StatusRequest, stream proto.DaemonService_SubscribeStatusServer) error {
subID, ch := s.statusRecorder.SubscribeToStateChanges()
defer func() {
s.statusRecorder.UnsubscribeFromStateChanges(subID)
log.Debug("client unsubscribed from status updates")
}()
log.Debug("client subscribed to status updates")
if err := s.sendStatusSnapshot(req, stream); err != nil {
return err
}
for {
select {
case _, ok := <-ch:
if !ok {
return nil
}
if err := s.sendStatusSnapshot(req, stream); err != nil {
return err
}
case <-stream.Context().Done():
return nil
}
}
}
func (s *Server) sendStatusSnapshot(req *proto.StatusRequest, stream proto.DaemonService_SubscribeStatusServer) error {
resp, err := s.buildStatusResponse(req)
if err != nil {
log.Warnf("build status snapshot for stream: %v", err)
return err
}
if err := stream.Send(resp); err != nil {
log.Warnf("send status snapshot to stream: %v", err)
return err
}
return nil
}