ginuerzh
7c95d40e05
- WrapUDPConn, WrapPacketConn, WrapListener: add nil guards for pc/ln params - NewGRPCPlugin: return no-op observer instead of nil on connection error - gRPC plugin: fix resource leak by wiring Close() through observerWrapper and service.Close() lifecycle - Both plugins: log unknown event types instead of silently dropping them - httpPlugin: remove dead nil check for always-non-nil client field - Stats.Reset: update core interface doc to match implementation behavior - Add doc comments to all exported symbols across the observer package
108 lines
2.5 KiB
Go
108 lines
2.5 KiB
Go
package observer
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import (
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"context"
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"errors"
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"io"
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"github.com/go-gost/core/logger"
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"github.com/go-gost/core/observer"
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"github.com/go-gost/plugin/observer/proto"
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"github.com/go-gost/x/internal/plugin"
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xstats "github.com/go-gost/x/observer/stats"
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"github.com/go-gost/x/service"
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"google.golang.org/grpc"
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)
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type grpcPlugin struct {
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conn grpc.ClientConnInterface
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client proto.ObserverClient
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log logger.Logger
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}
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// NewGRPCPlugin creates an Observer plugin based on gRPC.
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// On connection error it returns a no-op observer that logs and discards
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// events rather than nil, so callers can always call Observe safely.
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func NewGRPCPlugin(name string, addr string, opts ...plugin.Option) observer.Observer {
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var options plugin.Options
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for _, opt := range opts {
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opt(&options)
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}
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log := logger.Default().WithFields(map[string]any{
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"kind": "observer",
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"observer": name,
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})
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conn, err := plugin.NewGRPCConn(addr, &options)
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if err != nil {
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log.Error(err)
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return &grpcPlugin{log: log} // no-op: client is nil, Observe returns nil
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}
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p := &grpcPlugin{
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conn: conn,
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log: log,
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}
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if conn != nil {
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p.client = proto.NewObserverClient(conn)
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}
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return p
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}
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func (p *grpcPlugin) Observe(ctx context.Context, events []observer.Event, opts ...observer.Option) error {
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if p.client == nil || len(events) == 0 {
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return nil
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}
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var req proto.ObserveRequest
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for _, event := range events {
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switch event.Type() {
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case observer.EventStatus:
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ev := event.(service.ServiceEvent)
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req.Events = append(req.Events, &proto.Event{
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Kind: ev.Kind,
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Service: ev.Service,
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Type: string(event.Type()),
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Status: &proto.ServiceStatus{
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State: string(ev.State),
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Msg: ev.Msg,
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},
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})
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case observer.EventStats:
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ev := event.(xstats.StatsEvent)
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req.Events = append(req.Events, &proto.Event{
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Kind: ev.Kind,
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Service: ev.Service,
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Client: ev.Client,
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Type: string(event.Type()),
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Stats: &proto.Stats{
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TotalConns: ev.TotalConns,
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CurrentConns: ev.CurrentConns,
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InputBytes: ev.InputBytes,
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OutputBytes: ev.OutputBytes,
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TotalErrs: ev.TotalErrs,
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},
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})
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default:
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p.log.Warnf("unknown event type: %s", event.Type())
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}
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}
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reply, err := p.client.Observe(ctx, &req)
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if err != nil {
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p.log.Error(err)
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return err
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}
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if reply == nil || !reply.Ok {
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return errors.New("observe failed")
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}
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return nil
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}
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func (p *grpcPlugin) Close() error {
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if closer, ok := p.conn.(io.Closer); ok {
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return closer.Close()
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}
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return nil
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}
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