add Path metadata

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.github/workflows/autoapprove.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: approve
-        uses: hmarr/auto-approve-action@v2
+        uses: hmarr/auto-approve-action@v3
         if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
         id: approve
         with:

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v3.3.0
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github/workflows/dependabot-automerge.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - name: metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v1.3.4
+        uses: dependabot/fetch-metadata@v1.3.6
         with:
           github-token: "${{ secrets.TOKEN }}"
       - name: merge

.github/workflows/pr.yml

@@ -34,7 +34,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v3.3.0
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

go.mod

@@ -1,13 +1,17 @@
 module go.unistack.org/micro-server-grpc/v3
 
-go 1.16
+go 1.20
 
 require (
-	github.com/golang/protobuf v1.5.2
-	go.unistack.org/micro/v3 v3.9.11
-	golang.org/x/net v0.0.0-20220225172249-27dd8689420f
-	golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 // indirect
-	google.golang.org/genproto v0.0.0-20220310185008-1973136f34c6 // indirect
-	google.golang.org/grpc v1.50.1
-	google.golang.org/protobuf v1.28.1
+	github.com/golang/protobuf v1.5.3
+	go.unistack.org/micro/v3 v3.10.31
+	golang.org/x/net v0.17.0
+	google.golang.org/grpc v1.59.0
+	google.golang.org/protobuf v1.31.0
+)
+
+require (
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20231030173426-d783a09b4405 // indirect
 )

go.sum

@@ -1,189 +1,24 @@
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-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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-golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
-golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+go.unistack.org/micro/v3 v3.10.31 h1:H5mowuB5i3AjG4GOj//V9oTldFZqfKtd5gJD+TeZYCM=
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 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
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-google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
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-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
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+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=

grpc.go

@@ -26,7 +26,6 @@ import (
 	"golang.org/x/net/netutil"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/encoding"
 	gmetadata "google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
@@ -35,17 +34,17 @@ import (
 )
 
 const (
-	DefaultContentType = "application/grpc+proto"
+	DefaultContentType = "application/grpc"
 )
 
 /*
-type grpcServerReflection struct {
+type ServerReflection struct {
 	srv *grpc.Server
 	s   *serverReflectionServer
 }
 */
 
-type grpcServer struct {
+type Server struct {
 	handlers    map[string]server.Handler
 	srv         *grpc.Server
 	exit        chan chan error
@@ -60,9 +59,9 @@ type grpcServer struct {
 	reflection bool
 }
 
-func newGRPCServer(opts ...server.Option) server.Server {
+func newServer(opts ...server.Option) *Server {
 	// create a grpc server
-	g := &grpcServer{
+	g := &Server{
 		opts: server.NewOptions(opts...),
 		rpc: &rServer{
 			serviceMap: make(map[string]*service),
@@ -91,7 +90,7 @@ func (r grpcRouter) ServeRequest(ctx context.Context, req server.Request, rsp se
 
 */
 
-func (g *grpcServer) configure(opts ...server.Option) error {
+func (g *Server) configure(opts ...server.Option) error {
 	g.Lock()
 	defer g.Unlock()
 
@@ -128,6 +127,10 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		}
 	}
 
+	for _, k := range g.opts.Codecs {
+		encoding.RegisterCodec(&wrapMicroCodec{k})
+	}
+
 	maxMsgSize := g.getMaxMsgSize()
 
 	gopts := []grpc.ServerOption{
@@ -136,10 +139,6 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		grpc.UnknownServiceHandler(g.handler),
 	}
 
-	if creds := g.getCredentials(); creds != nil {
-		gopts = append(gopts, grpc.Creds(creds))
-	}
-
 	if opts := g.getGrpcOptions(); opts != nil {
 		gopts = append(opts, gopts...)
 	}
@@ -165,7 +164,7 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 	return nil
 }
 
-func (g *grpcServer) getMaxMsgSize() int {
+func (g *Server) getMaxMsgSize() int {
 	if g.opts.Context == nil {
 		return codec.DefaultMaxMsgSize
 	}
@@ -176,14 +175,7 @@ func (g *grpcServer) getMaxMsgSize() int {
 	return s
 }
 
-func (g *grpcServer) getCredentials() credentials.TransportCredentials {
-	if g.opts.TLSConfig != nil {
-		return credentials.NewTLS(g.opts.TLSConfig)
-	}
-	return nil
-}
-
-func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
+func (g *Server) getGrpcOptions() []grpc.ServerOption {
 	if g.opts.Context == nil {
 		return nil
 	}
@@ -196,7 +188,7 @@ func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
 	return opts
 }
 
-func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err error) {
+func (g *Server) handler(srv interface{}, stream grpc.ServerStream) (err error) {
 	fullMethod, ok := grpc.MethodFromServerStream(stream)
 	if !ok {
 		return status.Errorf(codes.Internal, "method does not exist in context")
@@ -242,6 +234,7 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 	for k, v := range gmd {
 		md.Set(k, strings.Join(v, ", "))
 	}
+	md.Set("Path", fullMethod)
 
 	var td string
 	// timeout for server deadline
@@ -283,7 +276,7 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 
 	// get peer from context
 	if p, ok := peer.FromContext(stream.Context()); ok {
-		md["Remote"] = p.Addr.String()
+		md.Set("Remote", p.Addr.String())
 		ctx = peer.NewContext(ctx, p)
 	}
 
@@ -302,7 +295,7 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 
 	/*
 		if svc == nil && g.reflection && methodName == "ServerReflectionInfo" {
-			rfl := &grpcServerReflection{srv: g.srv, s: &serverReflectionServer{s: g.srv}}
+			rfl := &ServerReflection{srv: g.srv, s: &serverReflectionServer{s: g.srv}}
 			svc = &service{}
 			svc.typ = reflect.TypeOf(rfl)
 			svc.rcvr = reflect.ValueOf(rfl)
@@ -350,7 +343,7 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 	return g.processStream(ctx, stream, svc, mtype, ct)
 }
 
-func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
+func (g *Server) processRequest(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
 	// for {
 	var err error
 	var argv, replyv reflect.Value
@@ -384,11 +377,12 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 		service:     g.opts.Name,
 		contentType: ct,
 		method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
+		endpoint:    fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
 		payload:     argv.Interface(),
 	}
 	// define the handler func
 	fn := func(ctx context.Context, req server.Request, rsp interface{}) (err error) {
-		returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), reflect.ValueOf(argv.Interface()), reflect.ValueOf(rsp)})
+		returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), argv, reflect.ValueOf(rsp)})
 
 		// The return value for the method is an error.
 		if rerr := returnValues[0].Interface(); rerr != nil {
@@ -406,7 +400,13 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 	statusCode := codes.OK
 	statusDesc := ""
 	// execute the handler
-	if appErr := fn(ctx, r, replyv.Interface()); appErr != nil {
+	appErr := fn(ctx, r, replyv.Interface())
+	if outmd, ok := metadata.FromOutgoingContext(ctx); ok {
+		if err = stream.SendHeader(gmetadata.New(outmd)); err != nil {
+			return err
+		}
+	}
+	if appErr != nil {
 		var errStatus *status.Status
 		switch verr := appErr.(type) {
 		case *errors.Error:
@@ -486,18 +486,19 @@ func (s *reflectStream) RecvMsg(m interface{}) error {
 	return s.stream.Recv(m)
 }
 
-func (g *grpcServerReflection) ServerReflectionInfo(ctx context.Context, stream server.Stream) error {
+func (g *ServerReflection) ServerReflectionInfo(ctx context.Context, stream server.Stream) error {
 	return g.s.ServerReflectionInfo(&reflectStream{stream})
 }
 */
 
-func (g *grpcServer) processStream(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
+func (g *Server) processStream(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
 	opts := g.opts
 
 	r := &rpcRequest{
 		service:     opts.Name,
 		contentType: ct,
 		method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
+		endpoint:    fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
 		stream:      true,
 	}
 
@@ -526,7 +527,13 @@ func (g *grpcServer) processStream(ctx context.Context, stream grpc.ServerStream
 	statusCode := codes.OK
 	statusDesc := ""
 
-	if appErr := fn(ctx, r, ss); appErr != nil {
+	appErr := fn(ctx, r, ss)
+	if outmd, ok := metadata.FromOutgoingContext(ctx); ok {
+		if err := stream.SendHeader(gmetadata.New(outmd)); err != nil {
+			return err
+		}
+	}
+	if appErr != nil {
 		var err error
 		var errStatus *status.Status
 		switch verr := appErr.(type) {
@@ -558,7 +565,7 @@ func (g *grpcServer) processStream(ctx context.Context, stream grpc.ServerStream
 	return status.New(statusCode, statusDesc).Err()
 }
 
-func (g *grpcServer) newCodec(ct string) (codec.Codec, error) {
+func (g *Server) newCodec(ct string) (codec.Codec, error) {
 	g.RLock()
 	defer g.RUnlock()
 
@@ -573,7 +580,7 @@ func (g *grpcServer) newCodec(ct string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
-func (g *grpcServer) Options() server.Options {
+func (g *Server) Options() server.Options {
 	g.RLock()
 	opts := g.opts
 	g.RUnlock()
@@ -581,15 +588,15 @@ func (g *grpcServer) Options() server.Options {
 	return opts
 }
 
-func (g *grpcServer) Init(opts ...server.Option) error {
+func (g *Server) Init(opts ...server.Option) error {
 	return g.configure(opts...)
 }
 
-func (g *grpcServer) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
+func (g *Server) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
 	return newRPCHandler(h, opts...)
 }
 
-func (g *grpcServer) Handle(h server.Handler) error {
+func (g *Server) Handle(h server.Handler) error {
 	if err := g.rpc.register(h.Handler()); err != nil {
 		return err
 	}
@@ -598,11 +605,11 @@ func (g *grpcServer) Handle(h server.Handler) error {
 	return nil
 }
 
-func (g *grpcServer) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
+func (g *Server) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
 	return newSubscriber(topic, sb, opts...)
 }
 
-func (g *grpcServer) Subscribe(sb server.Subscriber) error {
+func (g *Server) Subscribe(sb server.Subscriber) error {
 	sub, ok := sb.(*subscriber)
 	if !ok {
 		return fmt.Errorf("invalid subscriber: expected *subscriber")
@@ -626,7 +633,7 @@ func (g *grpcServer) Subscribe(sb server.Subscriber) error {
 	return nil
 }
 
-func (g *grpcServer) Register() error {
+func (g *Server) Register() error {
 	g.RLock()
 	rsvc := g.rsvc
 	config := g.opts
@@ -700,38 +707,13 @@ func (g *grpcServer) Register() error {
 	g.Lock()
 	defer g.Unlock()
 
-	for sb := range g.subscribers {
-		handler := g.createSubHandler(sb, config)
-		var opts []broker.SubscribeOption
-		if queue := sb.Options().Queue; len(queue) > 0 {
-			opts = append(opts, broker.SubscribeGroup(queue))
-		}
-
-		subCtx := config.Context
-		if cx := sb.Options().Context; cx != nil {
-			subCtx = cx
-		}
-		opts = append(opts, broker.SubscribeContext(subCtx))
-		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
-		opts = append(opts, broker.SubscribeBodyOnly(sb.Options().BodyOnly))
-
-		if config.Logger.V(logger.InfoLevel) {
-			config.Logger.Infof(config.Context, "Subscribing to topic: %s", sb.Topic())
-		}
-		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
-		if err != nil {
-			return err
-		}
-		g.subscribers[sb] = []broker.Subscriber{sub}
-	}
-
 	g.registered = true
 	g.rsvc = service
 
 	return nil
 }
 
-func (g *grpcServer) Deregister() error {
+func (g *Server) Deregister() error {
 	var err error
 
 	g.RLock()
@@ -785,7 +767,7 @@ func (g *grpcServer) Deregister() error {
 	return nil
 }
 
-func (g *grpcServer) Start() error {
+func (g *Server) Start() error {
 	g.RLock()
 	if g.started {
 		g.RUnlock()
@@ -795,10 +777,6 @@ func (g *grpcServer) Start() error {
 
 	config := g.Options()
 
-	for _, k := range config.Codecs {
-		encoding.RegisterCodec(&wrapMicroCodec{k})
-	}
-
 	// micro: config.Transport.Listen(config.Address)
 	var ts net.Listener
 	var err error
@@ -862,6 +840,10 @@ func (g *grpcServer) Start() error {
 		}
 	}
 
+	if err = g.subscribe(); err != nil {
+		return err
+	}
+
 	// micro: go ts.Accept(s.accept)
 	go func() {
 		if err = g.srv.Serve(ts); err != nil {
@@ -973,7 +955,38 @@ func (g *grpcServer) Start() error {
 	return nil
 }
 
-func (g *grpcServer) Stop() error {
+func (g *Server) subscribe() error {
+	config := g.opts
+
+	for sb := range g.subscribers {
+		handler := g.createSubHandler(sb, config)
+		var opts []broker.SubscribeOption
+		if queue := sb.Options().Queue; len(queue) > 0 {
+			opts = append(opts, broker.SubscribeGroup(queue))
+		}
+
+		subCtx := config.Context
+		if cx := sb.Options().Context; cx != nil {
+			subCtx = cx
+		}
+		opts = append(opts, broker.SubscribeContext(subCtx))
+		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
+		opts = append(opts, broker.SubscribeBodyOnly(sb.Options().BodyOnly))
+
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Infof(config.Context, "Subscribing to topic: %s", sb.Topic())
+		}
+		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
+		if err != nil {
+			return err
+		}
+		g.subscribers[sb] = []broker.Subscriber{sub}
+	}
+
+	return nil
+}
+
+func (g *Server) Stop() error {
 	g.RLock()
 	if !g.started {
 		g.RUnlock()
@@ -993,14 +1006,18 @@ func (g *grpcServer) Stop() error {
 	return err
 }
 
-func (g *grpcServer) String() string {
+func (g *Server) String() string {
 	return "grpc"
 }
 
-func (g *grpcServer) Name() string {
+func (g *Server) Name() string {
 	return g.opts.Name
 }
 
-func NewServer(opts ...server.Option) server.Server {
-	return newGRPCServer(opts...)
+func (g *Server) GRPCServer() *grpc.Server {
+	return g.srv
+}
+
+func NewServer(opts ...server.Option) *Server {
+	return newServer(opts...)
 }

subscriber.go

@@ -102,7 +102,7 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 	}
 }
 
-func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
+func (g *Server) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
 	return func(p broker.Event) (err error) {
 		defer func() {
 			if r := recover(); r != nil {