api/metadata: clean package (#926)

* clean api proto
* fix nil trace_id

api/metadata/metadata.pb.go

@@ -0,0 +1,365 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.14.0
+// source: metadata.proto
+
+package metadata
+
+import (
+	_ "google.golang.org/genproto/googleapis/api/annotations"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type ListServicesRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *ListServicesRequest) Reset() {
+	*x = ListServicesRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metadata_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListServicesRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListServicesRequest) ProtoMessage() {}
+
+func (x *ListServicesRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_metadata_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListServicesRequest.ProtoReflect.Descriptor instead.
+func (*ListServicesRequest) Descriptor() ([]byte, []int) {
+	return file_metadata_proto_rawDescGZIP(), []int{0}
+}
+
+type ListServicesReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Services []string `protobuf:"bytes,1,rep,name=services,proto3" json:"services,omitempty"`
+	Methods  []string `protobuf:"bytes,2,rep,name=methods,proto3" json:"methods,omitempty"`
+}
+
+func (x *ListServicesReply) Reset() {
+	*x = ListServicesReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metadata_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListServicesReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListServicesReply) ProtoMessage() {}
+
+func (x *ListServicesReply) ProtoReflect() protoreflect.Message {
+	mi := &file_metadata_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListServicesReply.ProtoReflect.Descriptor instead.
+func (*ListServicesReply) Descriptor() ([]byte, []int) {
+	return file_metadata_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ListServicesReply) GetServices() []string {
+	if x != nil {
+		return x.Services
+	}
+	return nil
+}
+
+func (x *ListServicesReply) GetMethods() []string {
+	if x != nil {
+		return x.Methods
+	}
+	return nil
+}
+
+type GetServiceDescRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+}
+
+func (x *GetServiceDescRequest) Reset() {
+	*x = GetServiceDescRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metadata_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetServiceDescRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetServiceDescRequest) ProtoMessage() {}
+
+func (x *GetServiceDescRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_metadata_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetServiceDescRequest.ProtoReflect.Descriptor instead.
+func (*GetServiceDescRequest) Descriptor() ([]byte, []int) {
+	return file_metadata_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *GetServiceDescRequest) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+type GetServiceDescReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	FileDescSet *descriptorpb.FileDescriptorSet `protobuf:"bytes,1,opt,name=file_desc_set,json=fileDescSet,proto3" json:"file_desc_set,omitempty"`
+}
+
+func (x *GetServiceDescReply) Reset() {
+	*x = GetServiceDescReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metadata_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetServiceDescReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetServiceDescReply) ProtoMessage() {}
+
+func (x *GetServiceDescReply) ProtoReflect() protoreflect.Message {
+	mi := &file_metadata_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetServiceDescReply.ProtoReflect.Descriptor instead.
+func (*GetServiceDescReply) Descriptor() ([]byte, []int) {
+	return file_metadata_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *GetServiceDescReply) GetFileDescSet() *descriptorpb.FileDescriptorSet {
+	if x != nil {
+		return x.FileDescSet
+	}
+	return nil
+}
+
+var File_metadata_proto protoreflect.FileDescriptor
+
+var file_metadata_proto_rawDesc = []byte{
+	0x0a, 0x0e, 0x6d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x12, 0x0a, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2e, 0x61, 0x70, 0x69, 0x1a, 0x20, 0x67, 0x6f,
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+	0x4c, 0x69, 0x73, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x52, 0x65, 0x71, 0x75,
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+	0x69, 0x63, 0x65, 0x73, 0x12, 0x18, 0x0a, 0x07, 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x73, 0x18,
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+	0x6d, 0x2f, 0x67, 0x6f, 0x2d, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x6b, 0x72, 0x61, 0x74,
+	0x6f, 0x73, 0x2f, 0x76, 0x32, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f,
+	0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x61, 0x70, 0x69, 0x3b, 0x6d, 0x65, 0x74, 0x61, 0x64,
+	0x61, 0x74, 0x61, 0xa2, 0x02, 0x09, 0x4b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x41, 0x50, 0x49, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_metadata_proto_rawDescOnce sync.Once
+	file_metadata_proto_rawDescData = file_metadata_proto_rawDesc
+)
+
+func file_metadata_proto_rawDescGZIP() []byte {
+	file_metadata_proto_rawDescOnce.Do(func() {
+		file_metadata_proto_rawDescData = protoimpl.X.CompressGZIP(file_metadata_proto_rawDescData)
+	})
+	return file_metadata_proto_rawDescData
+}
+
+var file_metadata_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_metadata_proto_goTypes = []interface{}{
+	(*ListServicesRequest)(nil),            // 0: kratos.api.ListServicesRequest
+	(*ListServicesReply)(nil),              // 1: kratos.api.ListServicesReply
+	(*GetServiceDescRequest)(nil),          // 2: kratos.api.GetServiceDescRequest
+	(*GetServiceDescReply)(nil),            // 3: kratos.api.GetServiceDescReply
+	(*descriptorpb.FileDescriptorSet)(nil), // 4: google.protobuf.FileDescriptorSet
+}
+var file_metadata_proto_depIdxs = []int32{
+	4, // 0: kratos.api.GetServiceDescReply.file_desc_set:type_name -> google.protobuf.FileDescriptorSet
+	0, // 1: kratos.api.Metadata.ListServices:input_type -> kratos.api.ListServicesRequest
+	2, // 2: kratos.api.Metadata.GetServiceDesc:input_type -> kratos.api.GetServiceDescRequest
+	1, // 3: kratos.api.Metadata.ListServices:output_type -> kratos.api.ListServicesReply
+	3, // 4: kratos.api.Metadata.GetServiceDesc:output_type -> kratos.api.GetServiceDescReply
+	3, // [3:5] is the sub-list for method output_type
+	1, // [1:3] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_metadata_proto_init() }
+func file_metadata_proto_init() {
+	if File_metadata_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_metadata_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListServicesRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_metadata_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListServicesReply); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_metadata_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetServiceDescRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_metadata_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetServiceDescReply); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_metadata_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   4,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_metadata_proto_goTypes,
+		DependencyIndexes: file_metadata_proto_depIdxs,
+		MessageInfos:      file_metadata_proto_msgTypes,
+	}.Build()
+	File_metadata_proto = out.File
+	file_metadata_proto_rawDesc = nil
+	file_metadata_proto_goTypes = nil
+	file_metadata_proto_depIdxs = nil
+}

api/metadata/metadata.proto

@@ -2,42 +2,42 @@ syntax = "proto3";
 
 package kratos.api;
 
-import "google/protobuf/any.proto";
 import "google/protobuf/descriptor.proto";
 import "google/api/annotations.proto";
 
-option go_package = "github.com/go-kratos/kratos/v2/api/proto/kratos/api;api";
+option go_package = "github.com/go-kratos/kratos/v2/api/proto/kratos/api;metadata";
 option java_multiple_files = true;
 option java_package = "com.github.kratos.api";
 option objc_class_prefix = "KratosAPI";
 
 
-// Metadata is api defintion metadata service
+// Metadata is api defintion metadata service.
 service Metadata {
-  // ListServices list the full name of all services
+  // ListServices list the full name of all services.
-  rpc ListServices (google.protobuf.Any) returns (ListServicesReply)  {
+  rpc ListServices (ListServicesRequest) returns (ListServicesReply)  {
       option (google.api.http) = {
         get: "/services",
       };
   }
-
+  // GetServiceDesc get the full fileDescriptorSet of service.
-  // GetServiceMeta get the full fileDescriptorSet of service
+  rpc GetServiceDesc (GetServiceDescRequest) returns (GetServiceDescReply)  {
-  rpc GetServiceMeta (GetServiceMetaRequest) returns (GetServiceMetaReply)  {
       option (google.api.http) = {
-        get: "/service/{name}/metadata",
+        get: "/services/{name}",
       };
   }
 }
 
+message ListServicesRequest {}
 message ListServicesReply {
   repeated string services = 1;
+  repeated string methods = 2;
 }
 
-message GetServiceMetaRequest {
+message GetServiceDescRequest {
   string name = 1;
 }
 
-message GetServiceMetaReply {
+message GetServiceDescReply {
-  google.protobuf.FileDescriptorSet protoSet = 1;
+  google.protobuf.FileDescriptorSet file_desc_set = 1;
 }
 

api/metadata/metadata_grpc.pb.go

@@ -1,17 +1,12 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.1.0
-// - protoc             v3.15.8
-// source: kratos/api/metadata.proto
 
-package api
+package metadata
 
 import (
 	context "context"
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
-	anypb "google.golang.org/protobuf/types/known/anypb"
 )
 
 // This is a compile-time assertion to ensure that this generated file
@@ -23,10 +18,10 @@ const _ = grpc.SupportPackageIsVersion7
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type MetadataClient interface {
-	// ListServices list the full name of all services
+	// ListServices list the full name of all services.
-	ListServices(ctx context.Context, in *anypb.Any, opts ...grpc.CallOption) (*ListServicesReply, error)
+	ListServices(ctx context.Context, in *ListServicesRequest, opts ...grpc.CallOption) (*ListServicesReply, error)
-	// GetServiceMeta get the full fileDescriptorSet of service
+	// GetServiceDesc get the full fileDescriptorSet of service.
-	GetServiceMeta(ctx context.Context, in *GetServiceMetaRequest, opts ...grpc.CallOption) (*GetServiceMetaReply, error)
+	GetServiceDesc(ctx context.Context, in *GetServiceDescRequest, opts ...grpc.CallOption) (*GetServiceDescReply, error)
 }
 
 type metadataClient struct {
@@ -37,7 +32,7 @@ func NewMetadataClient(cc grpc.ClientConnInterface) MetadataClient {
 	return &metadataClient{cc}
 }
 
-func (c *metadataClient) ListServices(ctx context.Context, in *anypb.Any, opts ...grpc.CallOption) (*ListServicesReply, error) {
+func (c *metadataClient) ListServices(ctx context.Context, in *ListServicesRequest, opts ...grpc.CallOption) (*ListServicesReply, error) {
 	out := new(ListServicesReply)
 	err := c.cc.Invoke(ctx, "/kratos.api.Metadata/ListServices", in, out, opts...)
 	if err != nil {
@@ -46,9 +41,9 @@ func (c *metadataClient) ListServices(ctx context.Context, in *anypb.Any, opts .
 	return out, nil
 }
 
-func (c *metadataClient) GetServiceMeta(ctx context.Context, in *GetServiceMetaRequest, opts ...grpc.CallOption) (*GetServiceMetaReply, error) {
+func (c *metadataClient) GetServiceDesc(ctx context.Context, in *GetServiceDescRequest, opts ...grpc.CallOption) (*GetServiceDescReply, error) {
-	out := new(GetServiceMetaReply)
+	out := new(GetServiceDescReply)
-	err := c.cc.Invoke(ctx, "/kratos.api.Metadata/GetServiceMeta", in, out, opts...)
+	err := c.cc.Invoke(ctx, "/kratos.api.Metadata/GetServiceDesc", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -59,10 +54,10 @@ func (c *metadataClient) GetServiceMeta(ctx context.Context, in *GetServiceMetaR
 // All implementations must embed UnimplementedMetadataServer
 // for forward compatibility
 type MetadataServer interface {
-	// ListServices list the full name of all services
+	// ListServices list the full name of all services.
-	ListServices(context.Context, *anypb.Any) (*ListServicesReply, error)
+	ListServices(context.Context, *ListServicesRequest) (*ListServicesReply, error)
-	// GetServiceMeta get the full fileDescriptorSet of service
+	// GetServiceDesc get the full fileDescriptorSet of service.
-	GetServiceMeta(context.Context, *GetServiceMetaRequest) (*GetServiceMetaReply, error)
+	GetServiceDesc(context.Context, *GetServiceDescRequest) (*GetServiceDescReply, error)
 	mustEmbedUnimplementedMetadataServer()
 }
 
@@ -70,11 +65,11 @@ type MetadataServer interface {
 type UnimplementedMetadataServer struct {
 }
 
-func (UnimplementedMetadataServer) ListServices(context.Context, *anypb.Any) (*ListServicesReply, error) {
+func (UnimplementedMetadataServer) ListServices(context.Context, *ListServicesRequest) (*ListServicesReply, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ListServices not implemented")
 }
-func (UnimplementedMetadataServer) GetServiceMeta(context.Context, *GetServiceMetaRequest) (*GetServiceMetaReply, error) {
+func (UnimplementedMetadataServer) GetServiceDesc(context.Context, *GetServiceDescRequest) (*GetServiceDescReply, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetServiceMeta not implemented")
+	return nil, status.Errorf(codes.Unimplemented, "method GetServiceDesc not implemented")
 }
 func (UnimplementedMetadataServer) mustEmbedUnimplementedMetadataServer() {}
 
@@ -90,7 +85,7 @@ func RegisterMetadataServer(s grpc.ServiceRegistrar, srv MetadataServer) {
 }
 
 func _Metadata_ListServices_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(anypb.Any)
+	in := new(ListServicesRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
@@ -102,25 +97,25 @@ func _Metadata_ListServices_Handler(srv interface{}, ctx context.Context, dec fu
 		FullMethod: "/kratos.api.Metadata/ListServices",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(MetadataServer).ListServices(ctx, req.(*anypb.Any))
+		return srv.(MetadataServer).ListServices(ctx, req.(*ListServicesRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-func _Metadata_GetServiceMeta_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func _Metadata_GetServiceDesc_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetServiceMetaRequest)
+	in := new(GetServiceDescRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(MetadataServer).GetServiceMeta(ctx, in)
+		return srv.(MetadataServer).GetServiceDesc(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/kratos.api.Metadata/GetServiceMeta",
+		FullMethod: "/kratos.api.Metadata/GetServiceDesc",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(MetadataServer).GetServiceMeta(ctx, req.(*GetServiceMetaRequest))
+		return srv.(MetadataServer).GetServiceDesc(ctx, req.(*GetServiceDescRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
@@ -137,10 +132,10 @@ var Metadata_ServiceDesc = grpc.ServiceDesc{
 			Handler:    _Metadata_ListServices_Handler,
 		},
 		{
-			MethodName: "GetServiceMeta",
+			MethodName: "GetServiceDesc",
-			Handler:    _Metadata_GetServiceMeta_Handler,
+			Handler:    _Metadata_GetServiceDesc_Handler,
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "kratos/api/metadata.proto",
+	Metadata: "metadata.proto",
 }

api/metadata/metadata_http.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go-http. DO NOT EDIT.
 
-package api
+package metadata
 
 import (
 	context "context"
 	http1 "github.com/go-kratos/kratos/v2/transport/http"
 	binding "github.com/go-kratos/kratos/v2/transport/http/binding"
 	mux "github.com/gorilla/mux"
-	anypb "google.golang.org/protobuf/types/known/anypb"
 	http "net/http"
 )
 
@@ -21,9 +20,9 @@ var _ = mux.NewRouter
 const _ = http1.SupportPackageIsVersion1
 
 type MetadataHandler interface {
-	GetServiceMeta(context.Context, *GetServiceMetaRequest) (*GetServiceMetaReply, error)
+	GetServiceDesc(context.Context, *GetServiceDescRequest) (*GetServiceDescReply, error)
 
-	ListServices(context.Context, *anypb.Any) (*ListServicesReply, error)
+	ListServices(context.Context, *ListServicesRequest) (*ListServicesReply, error)
 }
 
 func NewMetadataHandler(srv MetadataHandler, opts ...http1.HandleOption) http.Handler {
@@ -34,14 +33,14 @@ func NewMetadataHandler(srv MetadataHandler, opts ...http1.HandleOption) http.Ha
 	r := mux.NewRouter()
 
 	r.HandleFunc("/services", func(w http.ResponseWriter, r *http.Request) {
-		var in anypb.Any
+		var in ListServicesRequest
 		if err := h.Decode(r, &in); err != nil {
 			h.Error(w, r, err)
 			return
 		}
 
 		next := func(ctx context.Context, req interface{}) (interface{}, error) {
-			return srv.ListServices(ctx, req.(*anypb.Any))
+			return srv.ListServices(ctx, req.(*ListServicesRequest))
 		}
 		if h.Middleware != nil {
 			next = h.Middleware(next)
@@ -57,8 +56,8 @@ func NewMetadataHandler(srv MetadataHandler, opts ...http1.HandleOption) http.Ha
 		}
 	}).Methods("GET")
 
-	r.HandleFunc("/service/{name}/metadata", func(w http.ResponseWriter, r *http.Request) {
+	r.HandleFunc("/services/{name}", func(w http.ResponseWriter, r *http.Request) {
-		var in GetServiceMetaRequest
+		var in GetServiceDescRequest
 		if err := h.Decode(r, &in); err != nil {
 			h.Error(w, r, err)
 			return
@@ -70,7 +69,7 @@ func NewMetadataHandler(srv MetadataHandler, opts ...http1.HandleOption) http.Ha
 		}
 
 		next := func(ctx context.Context, req interface{}) (interface{}, error) {
-			return srv.GetServiceMeta(ctx, req.(*GetServiceMetaRequest))
+			return srv.GetServiceDesc(ctx, req.(*GetServiceDescRequest))
 		}
 		if h.Middleware != nil {
 			next = h.Middleware(next)
@@ -80,7 +79,7 @@ func NewMetadataHandler(srv MetadataHandler, opts ...http1.HandleOption) http.Ha
 			h.Error(w, r, err)
 			return
 		}
-		reply := out.(*GetServiceMetaReply)
+		reply := out.(*GetServiceDescReply)
 		if err := h.Encode(w, r, reply); err != nil {
 			h.Error(w, r, err)
 		}

api/metadata/server.go

@@ -1,36 +1,163 @@
 package metadata
 
 import (
+	"bytes"
+	"compress/gzip"
 	"context"
+	"fmt"
+	"io/ioutil"
+	"sync"
 
-	"github.com/go-kratos/kratos/v2/api/proto/kratos/api"
+	"github.com/golang/protobuf/proto"
+	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
 	"google.golang.org/grpc"
-	anypb "google.golang.org/protobuf/types/known/anypb"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
 )
 
 // Server is api meta server
 type Server struct {
-	api.UnimplementedMetadataServer
+	UnimplementedMetadataServer
-	s *Service
+
+	srv      *grpc.Server
+	lock     sync.Mutex
+	services map[string]*descriptorpb.FileDescriptorSet
+	methods  map[string][]string
 }
 
 // NewServer create server instance
-func NewServer(grpcSrv ...*grpc.Server) *Server {
+func NewServer(srv *grpc.Server) *Server {
-	return &Server{s: NewService(grpcSrv...)}
+	return &Server{
+		srv:      srv,
+		services: make(map[string]*descriptorpb.FileDescriptorSet),
+		methods:  make(map[string][]string),
+	}
+}
+
+func (s *Server) load() error {
+	if len(s.services) == len(s.srv.GetServiceInfo()) {
+		return nil
+	}
+	for name, info := range s.srv.GetServiceInfo() {
+		fdenc, ok := parseMetadata(info.Metadata)
+		if !ok {
+			return fmt.Errorf("invalid service %s metadata", name)
+		}
+		fd, err := decodeFileDesc(fdenc)
+		if err != nil {
+			return err
+		}
+		protoSet, err := allDependency(fd)
+		if err != nil {
+			return err
+		}
+		s.services[name] = &dpb.FileDescriptorSet{File: protoSet}
+		for _, method := range info.Methods {
+			s.methods[name] = append(s.methods[name], method.Name)
+		}
+	}
+	return nil
 }
 
 // ListServices return all services
-func (s *Server) ListServices(ctx context.Context, in *anypb.Any) (*api.ListServicesReply, error) {
+func (s *Server) ListServices(ctx context.Context, in *ListServicesRequest) (*ListServicesReply, error) {
-	var reply api.ListServicesReply
+	s.lock.Lock()
-	var err error
+	defer s.lock.Unlock()
-	reply.Services, err = s.s.ListServices(ctx)
+	if err := s.load(); err != nil {
-	return &reply, err
+		return nil, err
-}
+	}
-
+	reply := new(ListServicesReply)
-// GetServiceMeta return service meta by name
+	for name := range s.services {
-func (s *Server) GetServiceMeta(ctx context.Context, in *api.GetServiceMetaRequest) (*api.GetServiceMetaReply, error) {
+		reply.Services = append(reply.Services, name)
-	var reply api.GetServiceMetaReply
+	}
-	var err error
+	for name, methods := range s.methods {
-	reply.ProtoSet, err = s.s.GetServiceMeta(ctx, in.Name)
+		for _, method := range methods {
-	return &reply, err
+			reply.Methods = append(reply.Methods, fmt.Sprintf("/%s/%s", name, method))
+		}
+	}
+	return reply, nil
+}
+
+// GetServiceDesc return service meta by name
+func (s *Server) GetServiceDesc(ctx context.Context, in *GetServiceDescRequest) (*GetServiceDescReply, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	if err := s.load(); err != nil {
+		return nil, err
+	}
+	fds, ok := s.services[in.Name]
+	if !ok {
+		return nil, status.Errorf(codes.NotFound, "service %s not found", in.Name)
+	}
+	return &GetServiceDescReply{FileDescSet: fds}, nil
+}
+
+// parseMetadata finds the file descriptor bytes specified meta.
+// For SupportPackageIsVersion4, m is the name of the proto file, we
+// call proto.FileDescriptor to get the byte slice.
+// For SupportPackageIsVersion3, m is a byte slice itself.
+func parseMetadata(meta interface{}) ([]byte, bool) {
+	// Check if meta is the file name.
+	if fileNameForMeta, ok := meta.(string); ok {
+		return proto.FileDescriptor(fileNameForMeta), true
+	}
+	// Check if meta is the byte slice.
+	if enc, ok := meta.([]byte); ok {
+		return enc, true
+	}
+	return nil, false
+}
+
+// decodeFileDesc does decompression and unmarshalling on the given
+// file descriptor byte slice.
+func decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
+	raw, err := decompress(enc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decompress enc: %v", err)
+	}
+	fd := new(dpb.FileDescriptorProto)
+	if err := proto.Unmarshal(raw, fd); err != nil {
+		return nil, fmt.Errorf("bad descriptor: %v", err)
+	}
+	return fd, nil
+}
+
+func allDependency(fd *dpb.FileDescriptorProto) ([]*dpb.FileDescriptorProto, error) {
+	var files []*dpb.FileDescriptorProto
+	for _, dep := range fd.Dependency {
+		fdDep, err := fileDescriptorProto(dep)
+		if err != nil {
+			return nil, err
+		}
+		temp, err := allDependency(fdDep)
+		if err != nil {
+			return nil, err
+		}
+		files = append(files, temp...)
+	}
+	files = append(files, fd)
+	return files, nil
+}
+
+// decompress does gzip decompression.
+func decompress(b []byte) ([]byte, error) {
+	r, err := gzip.NewReader(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	out, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	return out, nil
+}
+
+func fileDescriptorProto(path string) (*dpb.FileDescriptorProto, error) {
+	fdenc := proto.FileDescriptor(path)
+	fdDep, err := decodeFileDesc(fdenc)
+	if err != nil {
+		return nil, err
+	}
+	return fdDep, nil
 }

api/metadata/service.go

@@ -1,182 +0,0 @@
-package metadata
-
-import (
-	"bytes"
-	"compress/gzip"
-	"context"
-	"fmt"
-	"io/ioutil"
-	"sync"
-
-	"github.com/golang/protobuf/proto"
-	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
-	"google.golang.org/grpc"
-	"google.golang.org/protobuf/reflect/protoreflect"
-	"google.golang.org/protobuf/reflect/protoregistry"
-	"google.golang.org/protobuf/types/descriptorpb"
-)
-
-// Service is description service
-type Service struct {
-	grpcSer  *grpc.Server
-	once     sync.Once
-	services map[string]*descriptorpb.FileDescriptorSet
-}
-
-// NewService create desc Service
-func NewService(grpcSrv ...*grpc.Server) *Service {
-	s := &Service{}
-	if len(grpcSrv) > 0 {
-		s.grpcSer = grpcSrv[0]
-	}
-	return s
-}
-
-// ListServices list the full name of all services
-func (s *Service) ListServices(ctx context.Context) (services []string, err error) {
-	services = []string{}
-	s.once.Do(func() {
-		err = s.initServices()
-	})
-	for name := range s.services {
-		services = append(services, name)
-	}
-	return
-}
-
-// GetServiceMeta get the full fileDescriptorSet of service
-func (s *Service) GetServiceMeta(ctx context.Context, name string) (fds *descriptorpb.FileDescriptorSet, err error) {
-	fds = &descriptorpb.FileDescriptorSet{}
-	s.once.Do(func() {
-		err = s.initServices()
-	})
-	if temp, ok := s.services[name]; ok {
-		fds = temp
-	}
-	return
-}
-
-func (s *Service) initServices() error {
-	serviceProto, err := s.listServices()
-	if err != nil {
-		s.services = make(map[string]*descriptorpb.FileDescriptorSet)
-		return err
-	}
-	s.services = serviceProto
-	return nil
-}
-
-func (s *Service) listServices() (map[string]*descriptorpb.FileDescriptorSet, error) {
-	services := make(map[string]*descriptorpb.FileDescriptorSet, 0)
-	if s.grpcSer != nil {
-		for svc, info := range s.grpcSer.GetServiceInfo() {
-			fdenc, ok := parseMetadata(info.Metadata)
-			if !ok {
-				return nil, fmt.Errorf("invalid service %s meta", svc)
-			}
-			fd, err := decodeFileDesc(fdenc)
-			if err != nil {
-				return nil, err
-			}
-			protoSet, err := allDependency(fd)
-			if err != nil {
-				return nil, err
-			}
-			services[svc] = &dpb.FileDescriptorSet{File: protoSet}
-		}
-		return services, nil
-	}
-	var err error
-	protoregistry.GlobalFiles.RangeFiles(func(fd protoreflect.FileDescriptor) bool {
-		if fd.Services() != nil && fd.Services().Len() > 0 {
-			for i := 0; i < fd.Services().Len(); i++ {
-				svc := string(fd.Services().Get(i).FullName())
-				fdp, e := fileDescriptorProto(fd.Path())
-				if e != nil {
-					err = e
-					return false
-				}
-				fdps, e := allDependency(fdp)
-				if e != nil {
-					err = e
-					return false
-				}
-				services[svc] = &dpb.FileDescriptorSet{File: fdps}
-			}
-		}
-		return true
-	})
-	return services, err
-}
-
-func fileDescriptorProto(path string) (*dpb.FileDescriptorProto, error) {
-	fdenc := proto.FileDescriptor(path)
-	fdDep, err := decodeFileDesc(fdenc)
-	if err != nil {
-		return nil, err
-	}
-	return fdDep, nil
-}
-
-func allDependency(fd *dpb.FileDescriptorProto) ([]*dpb.FileDescriptorProto, error) {
-	var files []*dpb.FileDescriptorProto
-	for _, dep := range fd.Dependency {
-		fdDep, err := fileDescriptorProto(dep)
-		if err != nil {
-			return nil, err
-		}
-		temp, err := allDependency(fdDep)
-		if err != nil {
-			return nil, err
-		}
-		files = append(files, temp...)
-	}
-	files = append(files, fd)
-	return files, nil
-}
-
-// parseMetadata finds the file descriptor bytes specified meta.
-// For SupportPackageIsVersion4, m is the name of the proto file, we
-// call proto.FileDescriptor to get the byte slice.
-// For SupportPackageIsVersion3, m is a byte slice itself.
-func parseMetadata(meta interface{}) ([]byte, bool) {
-	// Check if meta is the file name.
-	if fileNameForMeta, ok := meta.(string); ok {
-		return proto.FileDescriptor(fileNameForMeta), true
-	}
-
-	// Check if meta is the byte slice.
-	if enc, ok := meta.([]byte); ok {
-		return enc, true
-	}
-
-	return nil, false
-}
-
-// decodeFileDesc does decompression and unmarshalling on the given
-// file descriptor byte slice.
-func decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
-	raw, err := decompress(enc)
-	if err != nil {
-		return nil, fmt.Errorf("failed to decompress enc: %v", err)
-	}
-
-	fd := new(dpb.FileDescriptorProto)
-	if err := proto.Unmarshal(raw, fd); err != nil {
-		return nil, fmt.Errorf("bad descriptor: %v", err)
-	}
-	return fd, nil
-}
-
-// decompress does gzip decompression.
-func decompress(b []byte) ([]byte, error) {
-	r, err := gzip.NewReader(bytes.NewReader(b))
-	if err != nil {
-		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
-	}
-	out, err := ioutil.ReadAll(r)
-	if err != nil {
-		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
-	}
-	return out, nil
-}

api/proto/kratos/api/annotations.pb.go

@@ -1,95 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.15.8
-// source: kratos/api/annotations.proto
-
-package api
-
-import (
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
-	reflect "reflect"
-)
-
-const (
-	// Verify that this generated code is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-	// Verify that runtime/protoimpl is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-)
-
-var file_kratos_api_annotations_proto_extTypes = []protoimpl.ExtensionInfo{
-	{
-		ExtendedType:  (*descriptorpb.EnumOptions)(nil),
-		ExtensionType: (*bool)(nil),
-		Field:         1108,
-		Name:          "kratos.api.errors",
-		Tag:           "varint,1108,opt,name=errors",
-		Filename:      "kratos/api/annotations.proto",
-	},
-}
-
-// Extension fields to descriptorpb.EnumOptions.
-var (
-	// optional bool errors = 1108;
-	E_Errors = &file_kratos_api_annotations_proto_extTypes[0]
-)
-
-var File_kratos_api_annotations_proto protoreflect.FileDescriptor
-
-var file_kratos_api_annotations_proto_rawDesc = []byte{
-	0x0a, 0x1c, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x61, 0x6e, 0x6e,
-	0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0a,
-	0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2e, 0x61, 0x70, 0x69, 0x1a, 0x20, 0x67, 0x6f, 0x6f, 0x67,
-	0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x64, 0x65, 0x73, 0x63,
-	0x72, 0x69, 0x70, 0x74, 0x6f, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3a, 0x35, 0x0a, 0x06,
-	0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x12, 0x1c, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6e, 0x75, 0x6d, 0x4f, 0x70, 0x74,
-	0x69, 0x6f, 0x6e, 0x73, 0x18, 0xd4, 0x08, 0x20, 0x01, 0x28, 0x08, 0x52, 0x06, 0x65, 0x72, 0x72,
-	0x6f, 0x72, 0x73, 0x42, 0x5e, 0x0a, 0x15, 0x63, 0x6f, 0x6d, 0x2e, 0x67, 0x69, 0x74, 0x68, 0x75,
-	0x62, 0x2e, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2e, 0x61, 0x70, 0x69, 0x50, 0x01, 0x5a, 0x37,
-	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x2d, 0x6b, 0x72,
-	0x61, 0x74, 0x6f, 0x73, 0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x76, 0x32, 0x2f, 0x61,
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-}
-
-var file_kratos_api_annotations_proto_goTypes = []interface{}{
-	(*descriptorpb.EnumOptions)(nil), // 0: google.protobuf.EnumOptions
-}
-var file_kratos_api_annotations_proto_depIdxs = []int32{
-	0, // 0: kratos.api.errors:extendee -> google.protobuf.EnumOptions
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	0, // [0:1] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
-}
-
-func init() { file_kratos_api_annotations_proto_init() }
-func file_kratos_api_annotations_proto_init() {
-	if File_kratos_api_annotations_proto != nil {
-		return
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_kratos_api_annotations_proto_rawDesc,
-			NumEnums:      0,
-			NumMessages:   0,
-			NumExtensions: 1,
-			NumServices:   0,
-		},
-		GoTypes:           file_kratos_api_annotations_proto_goTypes,
-		DependencyIndexes: file_kratos_api_annotations_proto_depIdxs,
-		ExtensionInfos:    file_kratos_api_annotations_proto_extTypes,
-	}.Build()
-	File_kratos_api_annotations_proto = out.File
-	file_kratos_api_annotations_proto_rawDesc = nil
-	file_kratos_api_annotations_proto_goTypes = nil
-	file_kratos_api_annotations_proto_depIdxs = nil
-}

api/proto/kratos/api/annotations.proto

@@ -1,13 +0,0 @@
-syntax = "proto3";
-package kratos.api;
-
-option go_package = "github.com/go-kratos/kratos/v2/api/proto/kratos/api;api";
-option java_multiple_files = true;
-option java_package = "com.github.kratos.api";
-option objc_class_prefix = "KratosAPI";
-
-import "google/protobuf/descriptor.proto";
-
-extend google.protobuf.EnumOptions {
-	bool errors = 1108;
-}

api/proto/kratos/api/metadata.pb.go

@@ -1,306 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.15.8
-// source: kratos/api/metadata.proto
-
-package api
-
-import (
-	_ "google.golang.org/genproto/googleapis/api/annotations"
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
-	anypb "google.golang.org/protobuf/types/known/anypb"
-	reflect "reflect"
-	sync "sync"
-)
-
-const (
-	// Verify that this generated code is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-	// Verify that runtime/protoimpl is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-)
-
-type ListServicesReply struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	Services []string `protobuf:"bytes,1,rep,name=services,proto3" json:"services,omitempty"`
-}
-
-func (x *ListServicesReply) Reset() {
-	*x = ListServicesReply{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_kratos_api_metadata_proto_msgTypes[0]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *ListServicesReply) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*ListServicesReply) ProtoMessage() {}
-
-func (x *ListServicesReply) ProtoReflect() protoreflect.Message {
-	mi := &file_kratos_api_metadata_proto_msgTypes[0]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use ListServicesReply.ProtoReflect.Descriptor instead.
-func (*ListServicesReply) Descriptor() ([]byte, []int) {
-	return file_kratos_api_metadata_proto_rawDescGZIP(), []int{0}
-}
-
-func (x *ListServicesReply) GetServices() []string {
-	if x != nil {
-		return x.Services
-	}
-	return nil
-}
-
-type GetServiceMetaRequest struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
-}
-
-func (x *GetServiceMetaRequest) Reset() {
-	*x = GetServiceMetaRequest{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_kratos_api_metadata_proto_msgTypes[1]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *GetServiceMetaRequest) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*GetServiceMetaRequest) ProtoMessage() {}
-
-func (x *GetServiceMetaRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_kratos_api_metadata_proto_msgTypes[1]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use GetServiceMetaRequest.ProtoReflect.Descriptor instead.
-func (*GetServiceMetaRequest) Descriptor() ([]byte, []int) {
-	return file_kratos_api_metadata_proto_rawDescGZIP(), []int{1}
-}
-
-func (x *GetServiceMetaRequest) GetName() string {
-	if x != nil {
-		return x.Name
-	}
-	return ""
-}
-
-type GetServiceMetaReply struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	ProtoSet *descriptorpb.FileDescriptorSet `protobuf:"bytes,1,opt,name=protoSet,proto3" json:"protoSet,omitempty"`
-}
-
-func (x *GetServiceMetaReply) Reset() {
-	*x = GetServiceMetaReply{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_kratos_api_metadata_proto_msgTypes[2]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *GetServiceMetaReply) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*GetServiceMetaReply) ProtoMessage() {}
-
-func (x *GetServiceMetaReply) ProtoReflect() protoreflect.Message {
-	mi := &file_kratos_api_metadata_proto_msgTypes[2]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use GetServiceMetaReply.ProtoReflect.Descriptor instead.
-func (*GetServiceMetaReply) Descriptor() ([]byte, []int) {
-	return file_kratos_api_metadata_proto_rawDescGZIP(), []int{2}
-}
-
-func (x *GetServiceMetaReply) GetProtoSet() *descriptorpb.FileDescriptorSet {
-	if x != nil {
-		return x.ProtoSet
-	}
-	return nil
-}
-
-var File_kratos_api_metadata_proto protoreflect.FileDescriptor
-
-var file_kratos_api_metadata_proto_rawDesc = []byte{
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-	0x73, 0x41, 0x50, 0x49, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-}
-
-var (
-	file_kratos_api_metadata_proto_rawDescOnce sync.Once
-	file_kratos_api_metadata_proto_rawDescData = file_kratos_api_metadata_proto_rawDesc
-)
-
-func file_kratos_api_metadata_proto_rawDescGZIP() []byte {
-	file_kratos_api_metadata_proto_rawDescOnce.Do(func() {
-		file_kratos_api_metadata_proto_rawDescData = protoimpl.X.CompressGZIP(file_kratos_api_metadata_proto_rawDescData)
-	})
-	return file_kratos_api_metadata_proto_rawDescData
-}
-
-var file_kratos_api_metadata_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
-var file_kratos_api_metadata_proto_goTypes = []interface{}{
-	(*ListServicesReply)(nil),              // 0: kratos.api.ListServicesReply
-	(*GetServiceMetaRequest)(nil),          // 1: kratos.api.GetServiceMetaRequest
-	(*GetServiceMetaReply)(nil),            // 2: kratos.api.GetServiceMetaReply
-	(*descriptorpb.FileDescriptorSet)(nil), // 3: google.protobuf.FileDescriptorSet
-	(*anypb.Any)(nil),                      // 4: google.protobuf.Any
-}
-var file_kratos_api_metadata_proto_depIdxs = []int32{
-	3, // 0: kratos.api.GetServiceMetaReply.protoSet:type_name -> google.protobuf.FileDescriptorSet
-	4, // 1: kratos.api.Metadata.ListServices:input_type -> google.protobuf.Any
-	1, // 2: kratos.api.Metadata.GetServiceMeta:input_type -> kratos.api.GetServiceMetaRequest
-	0, // 3: kratos.api.Metadata.ListServices:output_type -> kratos.api.ListServicesReply
-	2, // 4: kratos.api.Metadata.GetServiceMeta:output_type -> kratos.api.GetServiceMetaReply
-	3, // [3:5] is the sub-list for method output_type
-	1, // [1:3] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
-}
-
-func init() { file_kratos_api_metadata_proto_init() }
-func file_kratos_api_metadata_proto_init() {
-	if File_kratos_api_metadata_proto != nil {
-		return
-	}
-	if !protoimpl.UnsafeEnabled {
-		file_kratos_api_metadata_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListServicesReply); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_kratos_api_metadata_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetServiceMetaRequest); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_kratos_api_metadata_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetServiceMetaReply); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_kratos_api_metadata_proto_rawDesc,
-			NumEnums:      0,
-			NumMessages:   3,
-			NumExtensions: 0,
-			NumServices:   1,
-		},
-		GoTypes:           file_kratos_api_metadata_proto_goTypes,
-		DependencyIndexes: file_kratos_api_metadata_proto_depIdxs,
-		MessageInfos:      file_kratos_api_metadata_proto_msgTypes,
-	}.Build()
-	File_kratos_api_metadata_proto = out.File
-	file_kratos_api_metadata_proto_rawDesc = nil
-	file_kratos_api_metadata_proto_goTypes = nil
-	file_kratos_api_metadata_proto_depIdxs = nil
-}

examples/blog/api/blog/v1/blog.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0-devel
+// 	protoc-gen-go v1.26.0
-// 	protoc        v3.6.1
+// 	protoc        v3.14.0
 // source: blog.proto
 
 package v1
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
@@ -22,10 +21,6 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
 type Article struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

examples/blog/api/blog/v1/error_reason.pb.go

@@ -0,0 +1,133 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.14.0
+// source: error_reason.proto
+
+package v1
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type ErrorReason int32
+
+const (
+	ErrorReason_TITLE_MISSING  ErrorReason = 0
+	ErrorReason_CONTENTMISSING ErrorReason = 1
+)
+
+// Enum value maps for ErrorReason.
+var (
+	ErrorReason_name = map[int32]string{
+		0: "TITLE_MISSING",
+		1: "CONTENTMISSING",
+	}
+	ErrorReason_value = map[string]int32{
+		"TITLE_MISSING":  0,
+		"CONTENTMISSING": 1,
+	}
+)
+
+func (x ErrorReason) Enum() *ErrorReason {
+	p := new(ErrorReason)
+	*p = x
+	return p
+}
+
+func (x ErrorReason) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (ErrorReason) Descriptor() protoreflect.EnumDescriptor {
+	return file_error_reason_proto_enumTypes[0].Descriptor()
+}
+
+func (ErrorReason) Type() protoreflect.EnumType {
+	return &file_error_reason_proto_enumTypes[0]
+}
+
+func (x ErrorReason) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use ErrorReason.Descriptor instead.
+func (ErrorReason) EnumDescriptor() ([]byte, []int) {
+	return file_error_reason_proto_rawDescGZIP(), []int{0}
+}
+
+var File_error_reason_proto protoreflect.FileDescriptor
+
+var file_error_reason_proto_rawDesc = []byte{
+	0x0a, 0x12, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x5f, 0x72, 0x65, 0x61, 0x73, 0x6f, 0x6e, 0x2e, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0b, 0x61, 0x70, 0x69, 0x2e, 0x62, 0x6c, 0x6f, 0x67, 0x2e, 0x76,
+	0x31, 0x2a, 0x34, 0x0a, 0x0b, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x52, 0x65, 0x61, 0x73, 0x6f, 0x6e,
+	0x12, 0x11, 0x0a, 0x0d, 0x54, 0x49, 0x54, 0x4c, 0x45, 0x5f, 0x4d, 0x49, 0x53, 0x53, 0x49, 0x4e,
+	0x47, 0x10, 0x00, 0x12, 0x12, 0x0a, 0x0e, 0x43, 0x4f, 0x4e, 0x54, 0x45, 0x4e, 0x54, 0x4d, 0x49,
+	0x53, 0x53, 0x49, 0x4e, 0x47, 0x10, 0x01, 0x42, 0x57, 0x0a, 0x0e, 0x62, 0x6c, 0x6f, 0x67, 0x2e,
+	0x76, 0x31, 0x2e, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x50, 0x01, 0x5a, 0x33, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x2d, 0x6b, 0x72, 0x61, 0x74, 0x6f,
+	0x73, 0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65,
+	0x73, 0x2f, 0x62, 0x6c, 0x6f, 0x67, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x76, 0x31, 0x3b, 0x76, 0x31,
+	0xa2, 0x02, 0x0d, 0x41, 0x50, 0x49, 0x42, 0x6c, 0x6f, 0x67, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x73,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_error_reason_proto_rawDescOnce sync.Once
+	file_error_reason_proto_rawDescData = file_error_reason_proto_rawDesc
+)
+
+func file_error_reason_proto_rawDescGZIP() []byte {
+	file_error_reason_proto_rawDescOnce.Do(func() {
+		file_error_reason_proto_rawDescData = protoimpl.X.CompressGZIP(file_error_reason_proto_rawDescData)
+	})
+	return file_error_reason_proto_rawDescData
+}
+
+var file_error_reason_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_error_reason_proto_goTypes = []interface{}{
+	(ErrorReason)(0), // 0: api.blog.v1.ErrorReason
+}
+var file_error_reason_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_error_reason_proto_init() }
+func file_error_reason_proto_init() {
+	if File_error_reason_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_error_reason_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   0,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_error_reason_proto_goTypes,
+		DependencyIndexes: file_error_reason_proto_depIdxs,
+		EnumInfos:         file_error_reason_proto_enumTypes,
+	}.Build()
+	File_error_reason_proto = out.File
+	file_error_reason_proto_rawDesc = nil
+	file_error_reason_proto_goTypes = nil
+	file_error_reason_proto_depIdxs = nil
+}

examples/blog/api/blog/v1/error_reason.proto

@@ -1,18 +1,14 @@
 syntax = "proto3";
 
-package api.blog.v1.errors;
+package api.blog.v1;
-
-import "kratos/api/annotations.proto";
 
 // 多语言特定包名，用于源代码引用
-option go_package = "github.com/go-kratos/kratos/examples/blog/api/v1/errors;errors";
+option go_package = "github.com/go-kratos/kratos/examples/blog/api/v1;v1";
 option java_multiple_files = true;
 option java_package = "blog.v1.errors";
 option objc_class_prefix = "APIBlogErrors";
 
-enum Article {
+enum ErrorReason {
-    option (kratos.api.errors) = true;
+    TITLE_MISSING = 0;
-
+    CONTENTMISSING = 1;
-    TitleMissing = 0;
-    ContentMissing = 1;
 }

examples/blog/api/blog/v1/errors/article.pb.go

@@ -1,137 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.15.8
-// source: article.proto
-
-package errors
-
-import (
-	_ "github.com/go-kratos/kratos/v2/api/proto/kratos/api"
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	reflect "reflect"
-	sync "sync"
-)
-
-const (
-	// Verify that this generated code is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-	// Verify that runtime/protoimpl is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-)
-
-type Article int32
-
-const (
-	Article_TitleMissing   Article = 0
-	Article_ContentMissing Article = 1
-)
-
-// Enum value maps for Article.
-var (
-	Article_name = map[int32]string{
-		0: "TitleMissing",
-		1: "ContentMissing",
-	}
-	Article_value = map[string]int32{
-		"TitleMissing":   0,
-		"ContentMissing": 1,
-	}
-)
-
-func (x Article) Enum() *Article {
-	p := new(Article)
-	*p = x
-	return p
-}
-
-func (x Article) String() string {
-	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
-}
-
-func (Article) Descriptor() protoreflect.EnumDescriptor {
-	return file_article_proto_enumTypes[0].Descriptor()
-}
-
-func (Article) Type() protoreflect.EnumType {
-	return &file_article_proto_enumTypes[0]
-}
-
-func (x Article) Number() protoreflect.EnumNumber {
-	return protoreflect.EnumNumber(x)
-}
-
-// Deprecated: Use Article.Descriptor instead.
-func (Article) EnumDescriptor() ([]byte, []int) {
-	return file_article_proto_rawDescGZIP(), []int{0}
-}
-
-var File_article_proto protoreflect.FileDescriptor
-
-var file_article_proto_rawDesc = []byte{
-	0x0a, 0x0d, 0x61, 0x72, 0x74, 0x69, 0x63, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
-	0x12, 0x61, 0x70, 0x69, 0x2e, 0x62, 0x6c, 0x6f, 0x67, 0x2e, 0x76, 0x31, 0x2e, 0x65, 0x72, 0x72,
-	0x6f, 0x72, 0x73, 0x1a, 0x1c, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x61, 0x70, 0x69, 0x2f,
-	0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x2a, 0x34, 0x0a, 0x07, 0x41, 0x72, 0x74, 0x69, 0x63, 0x6c, 0x65, 0x12, 0x10, 0x0a, 0x0c,
-	0x54, 0x69, 0x74, 0x6c, 0x65, 0x4d, 0x69, 0x73, 0x73, 0x69, 0x6e, 0x67, 0x10, 0x00, 0x12, 0x12,
-	0x0a, 0x0e, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x4d, 0x69, 0x73, 0x73, 0x69, 0x6e, 0x67,
-	0x10, 0x01, 0x1a, 0x03, 0xa0, 0x45, 0x01, 0x42, 0x62, 0x0a, 0x0e, 0x62, 0x6c, 0x6f, 0x67, 0x2e,
-	0x76, 0x31, 0x2e, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x50, 0x01, 0x5a, 0x3e, 0x67, 0x69, 0x74,
-	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x2d, 0x6b, 0x72, 0x61, 0x74, 0x6f,
-	0x73, 0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65,
-	0x73, 0x2f, 0x62, 0x6c, 0x6f, 0x67, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x76, 0x31, 0x2f, 0x65, 0x72,
-	0x72, 0x6f, 0x72, 0x73, 0x3b, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0xa2, 0x02, 0x0d, 0x41, 0x50,
-	0x49, 0x42, 0x6c, 0x6f, 0x67, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f,
-	0x74, 0x6f, 0x33,
-}
-
-var (
-	file_article_proto_rawDescOnce sync.Once
-	file_article_proto_rawDescData = file_article_proto_rawDesc
-)
-
-func file_article_proto_rawDescGZIP() []byte {
-	file_article_proto_rawDescOnce.Do(func() {
-		file_article_proto_rawDescData = protoimpl.X.CompressGZIP(file_article_proto_rawDescData)
-	})
-	return file_article_proto_rawDescData
-}
-
-var file_article_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_article_proto_goTypes = []interface{}{
-	(Article)(0), // 0: api.blog.v1.errors.Article
-}
-var file_article_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
-}
-
-func init() { file_article_proto_init() }
-func file_article_proto_init() {
-	if File_article_proto != nil {
-		return
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_article_proto_rawDesc,
-			NumEnums:      1,
-			NumMessages:   0,
-			NumExtensions: 0,
-			NumServices:   0,
-		},
-		GoTypes:           file_article_proto_goTypes,
-		DependencyIndexes: file_article_proto_depIdxs,
-		EnumInfos:         file_article_proto_enumTypes,
-	}.Build()
-	File_article_proto = out.File
-	file_article_proto_rawDesc = nil
-	file_article_proto_goTypes = nil
-	file_article_proto_depIdxs = nil
-}

examples/blog/api/blog/v1/errors/article_errors.pb.go

@@ -1,24 +0,0 @@
-// Code generated by protoc-gen-go-errors. DO NOT EDIT.
-
-package errors
-
-import (
-	errors "github.com/go-kratos/kratos/v2/errors"
-)
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the kratos package it is being compiled against.
-const _ = errors.SupportPackageIsVersion1
-
-const (
-	Errors_TitleMissing   = "Article_TitleMissing"
-	Errors_ContentMissing = "Article_ContentMissing"
-)
-
-func IsTitleMissing(err error) bool {
-	return errors.Reason(err) == Errors_TitleMissing
-}
-
-func IsContentMissing(err error) bool {
-	return errors.Reason(err) == Errors_ContentMissing
-}

middleware/logging/logging.go

@@ -26,7 +26,9 @@ func Server(l log.Logger) middleware.Middleware {
 				query     string
 				traceID   string
 			)
-			traceID = trace.SpanContextFromContext(ctx).TraceID().String()
+			if tid := trace.SpanContextFromContext(ctx).TraceID(); tid.IsValid() {
+				traceID = tid.String()
+			}
 			if stringer, ok := req.(fmt.Stringer); ok {
 				args = stringer.String()
 			} else {
@@ -110,7 +112,9 @@ func Client(l log.Logger) middleware.Middleware {
 				query     string
 				traceID   string
 			)
-			traceID = trace.SpanContextFromContext(ctx).TraceID().String()
+			if tid := trace.SpanContextFromContext(ctx).TraceID(); tid.IsValid() {
+				traceID = tid.String()
+			}
 			if info, ok := http.FromClientContext(ctx); ok {
 				component = "HTTP"
 				path = info.Request.URL.Path

transport/grpc/server.go

@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/go-kratos/kratos/v2/api/metadata"
-	"github.com/go-kratos/kratos/v2/api/proto/kratos/api"
 	"github.com/go-kratos/kratos/v2/internal/host"
 	"github.com/go-kratos/kratos/v2/log"
 	"github.com/go-kratos/kratos/v2/middleware"
@@ -77,7 +76,7 @@ type Server struct {
 	middleware middleware.Middleware
 	grpcOpts   []grpc.ServerOption
 	health     *health.Server
-	metaServer *metadata.Server
+	metadata   *metadata.Server
 }
 
 // NewServer creates a gRPC server by options.
@@ -104,10 +103,10 @@ func NewServer(opts ...ServerOption) *Server {
 		grpcOpts = append(grpcOpts, srv.grpcOpts...)
 	}
 	srv.Server = grpc.NewServer(grpcOpts...)
-	srv.metaServer = metadata.NewServer(srv.Server)
+	srv.metadata = metadata.NewServer(srv.Server)
 	// internal register
 	grpc_health_v1.RegisterHealthServer(srv.Server, srv.health)
-	api.RegisterMetadataServer(srv.Server, srv.metaServer)
+	metadata.RegisterMetadataServer(srv.Server, srv.metadata)
 	reflection.Register(srv.Server)
 	return srv
 }