补充grpc steam

skills/grpc/client/main.go

@@ -3,6 +3,8 @@ package main
 import (
 	"context"
 	"fmt"
+	"io"
+	"time"
 
 	"gitlab.com/go-course-project/go17/skills/grpc/service"
 	"google.golang.org/grpc"
@@ -18,11 +20,41 @@ func main() {
 	}
 
 	client := service.NewHelloServiceClient(conn)
-	resp, err := client.Hello(context.Background(), &service.HelloRequest{
+	// resp, err := client.Hello(context.Background(), &service.HelloRequest{
-		MyName: "bob",
+	// 	MyName: "bob",
-	})
+	// })
+	// if err != nil {
+	// 	panic(err)
+	// }
+	// fmt.Println(resp)
+
+	stream, err := client.Chat(context.Background())
 	if err != nil {
 		panic(err)
 	}
+
+	// 1. 处理返回结果的在后台
+	go func() {
+		for {
+			resp, err := stream.Recv()
+			if err != nil {
+				// 如果遇到io.EOF表示客户端流被关闭
+				if err == io.EOF {
+					break
+				}
+				fmt.Println(err)
+				return
+			}
 			fmt.Println(resp)
 		}
+	}()
+
+	// 2. 发送请求的在主Goroutine
+	for i := range 10 {
+		stream.Send(&service.ChatRequest{
+			Id:      uint64(i + 1),
+			Message: "test",
+		})
+		time.Sleep(1 * time.Second)
+	}
+}

skills/grpc/server/main.go

@@ -2,26 +2,50 @@ package main
 
 import (
 	"context"
+	"fmt"
+	"io"
 	"net"
 
 	"gitlab.com/go-course-project/go17/skills/grpc/service"
 	"google.golang.org/grpc"
 )
 
-type UnimplementedHelloServiceServer struct {
+type HelloServiceServer struct {
 	service.UnimplementedHelloServiceServer
 }
 
-func (UnimplementedHelloServiceServer) Hello(ctx context.Context, req *service.HelloRequest) (*service.HelloResponse, error) {
+func (HelloServiceServer) Hello(ctx context.Context, req *service.HelloRequest) (*service.HelloResponse, error) {
 	return &service.HelloResponse{
 		Message: "hello, " + req.MyName,
 	}, nil
 }
 
+func (HelloServiceServer) Chat(stream grpc.BidiStreamingServer[service.ChatRequest, service.ChatResponse]) error {
+	// 1. 获取用户的请求，然后处理, 处理完成后，通过stream 返回给客户端
+	for {
+		// 接收一个请求
+		req, err := stream.Recv()
+		if err != nil {
+			// 如果遇到io.EOF表示客户端流被关闭
+			if err == io.EOF {
+				return nil
+			}
+			return err
+		}
+
+		// 2. 处理请求
+		fmt.Println(req.Message)
+		stream.Send(&service.ChatResponse{
+			Id:        req.Id,
+			IsSuccess: true,
+		})
+	}
+}
+
 func main() {
 	// 1. 示例化一个grpc server对象
 	server := grpc.NewServer()
-	service.RegisterHelloServiceServer(server, &UnimplementedHelloServiceServer{})
+	service.RegisterHelloServiceServer(server, &HelloServiceServer{})
 
 	// 2. 启动grpc服务
 	lis, err := net.Listen("tcp", ":1234")

skills/grpc/service/hello.pb.go

@@ -133,6 +133,118 @@ func (x *HelloResponse) GetMessage() string {
 	return ""
 }
 
+type ChatRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Id            uint64                 `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
+	Message       string                 `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ChatRequest) Reset() {
+	*x = ChatRequest{}
+	mi := &file_skills_grpc_service_hello_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ChatRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ChatRequest) ProtoMessage() {}
+
+func (x *ChatRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_skills_grpc_service_hello_proto_msgTypes[2]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ChatRequest.ProtoReflect.Descriptor instead.
+func (*ChatRequest) Descriptor() ([]byte, []int) {
+	return file_skills_grpc_service_hello_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *ChatRequest) GetId() uint64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *ChatRequest) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+type ChatResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Id            uint64                 `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
+	IsSuccess     bool                   `protobuf:"varint,2,opt,name=is_success,json=isSuccess,proto3" json:"is_success,omitempty"`
+	Message       string                 `protobuf:"bytes,3,opt,name=message,proto3" json:"message,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ChatResponse) Reset() {
+	*x = ChatResponse{}
+	mi := &file_skills_grpc_service_hello_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ChatResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ChatResponse) ProtoMessage() {}
+
+func (x *ChatResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_skills_grpc_service_hello_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ChatResponse.ProtoReflect.Descriptor instead.
+func (*ChatResponse) Descriptor() ([]byte, []int) {
+	return file_skills_grpc_service_hello_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *ChatResponse) GetId() uint64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *ChatResponse) GetIsSuccess() bool {
+	if x != nil {
+		return x.IsSuccess
+	}
+	return false
+}
+
+func (x *ChatResponse) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
 var File_skills_grpc_service_hello_proto protoreflect.FileDescriptor
 
 var file_skills_grpc_service_hello_proto_rawDesc = string([]byte{
@@ -154,15 +266,28 @@ var file_skills_grpc_service_hello_proto_rawDesc = string([]byte{
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+	0x6f, 0x33,
 })
 
 var (
@@ -177,18 +302,22 @@ func file_skills_grpc_service_hello_proto_rawDescGZIP() []byte {
 	return file_skills_grpc_service_hello_proto_rawDescData
 }
 
-var file_skills_grpc_service_hello_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_skills_grpc_service_hello_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
 var file_skills_grpc_service_hello_proto_goTypes = []any{
 	(*HelloRequest)(nil),  // 0: hello.HelloRequest
 	(*HelloResponse)(nil), // 1: hello.HelloResponse
-	nil,                   // 2: hello.HelloRequest.ExtrasEntry
+	(*ChatRequest)(nil),   // 2: hello.ChatRequest
+	(*ChatResponse)(nil),  // 3: hello.ChatResponse
+	nil,                   // 4: hello.HelloRequest.ExtrasEntry
 }
 var file_skills_grpc_service_hello_proto_depIdxs = []int32{
-	2, // 0: hello.HelloRequest.extras:type_name -> hello.HelloRequest.ExtrasEntry
+	4, // 0: hello.HelloRequest.extras:type_name -> hello.HelloRequest.ExtrasEntry
 	0, // 1: hello.HelloService.Hello:input_type -> hello.HelloRequest
-	1, // 2: hello.HelloService.Hello:output_type -> hello.HelloResponse
+	2, // 2: hello.HelloService.Chat:input_type -> hello.ChatRequest
-	2, // [2:3] is the sub-list for method output_type
+	1, // 3: hello.HelloService.Hello:output_type -> hello.HelloResponse
-	1, // [1:2] is the sub-list for method input_type
+	3, // 4: hello.HelloService.Chat:output_type -> hello.ChatResponse
+	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
@@ -205,7 +334,7 @@ func file_skills_grpc_service_hello_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_skills_grpc_service_hello_proto_rawDesc), len(file_skills_grpc_service_hello_proto_rawDesc)),
 			NumEnums:      0,
-			NumMessages:   3,
+			NumMessages:   5,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

skills/grpc/service/hello.proto

@@ -14,7 +14,20 @@ message HelloResponse {
     string message = 1;
 }
 
+message ChatRequest {
+    uint64 id = 1;
+    string message = 2;
+}
+
+message ChatResponse {
+    uint64 id = 1;
+    bool is_success = 2;
+    string message = 3;
+}
+
 // grpc 接口声明
 service HelloService {
     rpc Hello(HelloRequest) returns(HelloResponse);
+    // 双向流接口
+    rpc Chat(stream ChatRequest) returns(stream ChatResponse);
 }

skills/grpc/service/hello_grpc.pb.go

@@ -20,6 +20,7 @@ const _ = grpc.SupportPackageIsVersion9
 
 const (
 	HelloService_Hello_FullMethodName = "/hello.HelloService/Hello"
+	HelloService_Chat_FullMethodName  = "/hello.HelloService/Chat"
 )
 
 // HelloServiceClient is the client API for HelloService service.
@@ -29,6 +30,8 @@ const (
 // grpc 接口声明
 type HelloServiceClient interface {
 	Hello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloResponse, error)
+	// 双向流接口
+	Chat(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[ChatRequest, ChatResponse], error)
 }
 
 type helloServiceClient struct {
@@ -49,6 +52,19 @@ func (c *helloServiceClient) Hello(ctx context.Context, in *HelloRequest, opts .
 	return out, nil
 }
 
+func (c *helloServiceClient) Chat(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[ChatRequest, ChatResponse], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &HelloService_ServiceDesc.Streams[0], HelloService_Chat_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[ChatRequest, ChatResponse]{ClientStream: stream}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type HelloService_ChatClient = grpc.BidiStreamingClient[ChatRequest, ChatResponse]
+
 // HelloServiceServer is the server API for HelloService service.
 // All implementations must embed UnimplementedHelloServiceServer
 // for forward compatibility.
@@ -56,6 +72,8 @@ func (c *helloServiceClient) Hello(ctx context.Context, in *HelloRequest, opts .
 // grpc 接口声明
 type HelloServiceServer interface {
 	Hello(context.Context, *HelloRequest) (*HelloResponse, error)
+	// 双向流接口
+	Chat(grpc.BidiStreamingServer[ChatRequest, ChatResponse]) error
 	mustEmbedUnimplementedHelloServiceServer()
 }
 
@@ -69,6 +87,9 @@ type UnimplementedHelloServiceServer struct{}
 func (UnimplementedHelloServiceServer) Hello(context.Context, *HelloRequest) (*HelloResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Hello not implemented")
 }
+func (UnimplementedHelloServiceServer) Chat(grpc.BidiStreamingServer[ChatRequest, ChatResponse]) error {
+	return status.Errorf(codes.Unimplemented, "method Chat not implemented")
+}
 func (UnimplementedHelloServiceServer) mustEmbedUnimplementedHelloServiceServer() {}
 func (UnimplementedHelloServiceServer) testEmbeddedByValue()                      {}
 
@@ -108,6 +129,13 @@ func _HelloService_Hello_Handler(srv interface{}, ctx context.Context, dec func(
 	return interceptor(ctx, in, info, handler)
 }
 
+func _HelloService_Chat_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(HelloServiceServer).Chat(&grpc.GenericServerStream[ChatRequest, ChatResponse]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type HelloService_ChatServer = grpc.BidiStreamingServer[ChatRequest, ChatResponse]
+
 // HelloService_ServiceDesc is the grpc.ServiceDesc for HelloService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -120,6 +148,13 @@ var HelloService_ServiceDesc = grpc.ServiceDesc{
 			Handler:    _HelloService_Hello_Handler,
 		},
 	},
-	Streams:  []grpc.StreamDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Chat",
+			Handler:       _HelloService_Chat_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
 	Metadata: "skills/grpc/service/hello.proto",
 }