简单编写
server端
package main
import (
"fmt"
"net"
"net/rpc"
)
// 定义类对象
type World struct {
}
// 绑定类方法
func (w *World) HelloWorld(name string, resp *string) error {
*resp = name + " 你好！"
return nil
}
func main() {
// 1.注册rpc服务，绑定对象方法
err := rpc.RegisterName("hello", new(World))
if err != nil {
fmt.Println("注册rpc服务失败", err)
return
}
//2. 设置监听
listener, err := net.Listen("tcp4", "127.0.0.1:8080")
if err != nil {
fmt.Println("net.Listen error", err)
return
}
defer listener.Close()
fmt.Println("开始监听：127.0.0.1:8080")
//3. 建立链接
conn, err := listener.Accept()
if err != nil {
fmt.Println("listener.Accept error:", err)
return
}
defer conn.Close()
fmt.Println("链接成功！")
//4.绑定服务
rpc.ServeConn(conn)
}
client端
package main
import (
"fmt"
"net/rpc"
)
func main() {
// 1. 用rpc链接服务器
client, err := rpc.Dial("tcp4", "127.0.0.1:8080")
if err != nil {
fmt.Println("dial error:", err)
return
}
defer client.Close()
// 2. 调用远程函数
var reply string
err = client.Call("hello.HelloWorld", "李白", &reply)
if err != nil {
fmt.Println("client.Call error", err)
return
}
fmt.Println("replay from rpc:", reply)
}
封装
server.go
package main
import (
"fmt"
"net"
"net/rpc/jsonrpc"
"rpc_learn"
)
// 定义类对象
type World struct {
}
// 绑定类方法
func (w *World) HelloWorld(name string, resp *string) error {
*resp = name + " 你好！"
fmt.Println("调用了WORLD")
return nil
}
func main() {
// 1.注册rpc服务，绑定对象方法
rpc_learn.RegisterRpcName(new(World))
//2. 设置监听
listener, err := net.Listen("tcp4", "127.0.0.1:8080")
if err != nil {
fmt.Println("net.Listen error", err)
return
}
defer listener.Close()
fmt.Println("开始监听：127.0.0.1:8080")
//3. 建立链接
conn, err := listener.Accept()
if err != nil {
fmt.Println("listener.Accept error:", err)
return
}
defer conn.Close()
fmt.Println("链接成功！")
//4.绑定服务
jsonrpc.ServeConn(conn)
}
client.go
package main
import (
"fmt"
"rpc_learn"
)
func main() {
// 1. 用rpc链接服务器
client := rpc_learn.InitClient("127.0.0.1:8080")
defer client.(*rpc_learn.MyClient).Close()
// 2. 调用远程函数
var reply string
err := client.HelloWorld("meowrain", &reply)
if err != nil {
fmt.Println("error: ", err)
}
fmt.Println("replay from rpc:", reply)
}
myinterface.go
package rpc_learn
import (
"fmt"
"net/rpc"
"net/rpc/jsonrpc"
)
type MyInterface interface {
HelloWorld(string, *string) error
}
func RegisterRpcName(i MyInterface) {
err := rpc.RegisterName("hello", i)
if err != nil {
fmt.Println("rpc.RegisterName error:", err)
return
}
}
type MyClient struct {
c *rpc.Client
}
func InitClient(addr string) MyInterface {
conn, err := jsonrpc.Dial("tcp", addr)
if err != nil {
fmt.Println("jsonrpc.Dial error: ", err)
return nil
}
var myclient MyClient = MyClient{
c: conn,
}
return &myclient
}
func (myclient *MyClient) HelloWorld(name string, resp *string) error {
err := myclient.c.Call("hello.HelloWorld", name, resp)
if err != nil {
return err
}
return nil
}
func (myclient *MyClient) Close() {
myclient.c.Close()
}
protobuf
例子：
syntax = "proto3";
package pb;
option go_package = ".";
message Student {
int32 age = 1;
string name = 2;
};
message People {
string name = 1;
}
service bj38 {
rpc Say(People) returns (Student);
}
生成go代码：
protoc --go_out=:. --go-grpc_out=:. *.proto
tproto.pb.go
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.34.2
// protoc v5.27.3
// source: tproto.proto
package pb
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 Student struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Age int32 `protobuf:"varint,1,opt,name=age,proto3" json:"age,omitempty"`
Name string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
}
func (x *Student) Reset() {
*x = Student{}
if protoimpl.UnsafeEnabled {
mi := &file_tproto_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Student) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Student) ProtoMessage() {}
func (x *Student) ProtoReflect() protoreflect.Message {
mi := &file_tproto_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 Student.ProtoReflect.Descriptor instead.
func (*Student) Descriptor() ([]byte, []int) {
return file_tproto_proto_rawDescGZIP(), []int{0}
}
func (x *Student) GetAge() int32 {
if x != nil {
return x.Age
}
return 0
}
func (x *Student) GetName() string {
if x != nil {
return x.Name
}
return ""
}
type People struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
}
func (x *People) Reset() {
*x = People{}
if protoimpl.UnsafeEnabled {
mi := &file_tproto_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *People) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*People) ProtoMessage() {}
func (x *People) ProtoReflect() protoreflect.Message {
mi := &file_tproto_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 People.ProtoReflect.Descriptor instead.
func (*People) Descriptor() ([]byte, []int) {
return file_tproto_proto_rawDescGZIP(), []int{1}
}
func (x *People) GetName() string {
if x != nil {
return x.Name
}
return ""
}
var File_tproto_proto protoreflect.FileDescriptor
var file_tproto_proto_rawDesc = []byte{
0x0a, 0x0c, 0x74, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x02,
0x70, 0x62, 0x22, 0x2f, 0x0a, 0x07, 0x53, 0x74, 0x75, 0x64, 0x65, 0x6e, 0x74, 0x12, 0x10, 0x0a,
0x03, 0x61, 0x67, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x03, 0x61, 0x67, 0x65, 0x12,
0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e,
0x61, 0x6d, 0x65, 0x22, 0x1c, 0x0a, 0x06, 0x50, 0x65, 0x6f, 0x70, 0x6c, 0x65, 0x12, 0x12, 0x0a,
0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d,
0x65, 0x32, 0x26, 0x0a, 0x04, 0x62, 0x6a, 0x33, 0x38, 0x12, 0x1e, 0x0a, 0x03, 0x53, 0x61, 0x79,
0x12, 0x0a, 0x2e, 0x70, 0x62, 0x2e, 0x50, 0x65, 0x6f, 0x70, 0x6c, 0x65, 0x1a, 0x0b, 0x2e, 0x70,
0x62, 0x2e, 0x53, 0x74, 0x75, 0x64, 0x65, 0x6e, 0x74, 0x42, 0x03, 0x5a, 0x01, 0x2e, 0x62, 0x06,
0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
}
var (
file_tproto_proto_rawDescOnce sync.Once
file_tproto_proto_rawDescData = file_tproto_proto_rawDesc
)
func file_tproto_proto_rawDescGZIP() []byte {
file_tproto_proto_rawDescOnce.Do(func() {
file_tproto_proto_rawDescData = protoimpl.X.CompressGZIP(file_tproto_proto_rawDescData)
})
return file_tproto_proto_rawDescData
}
var file_tproto_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_tproto_proto_goTypes = []any{
(*Student)(nil), // 0: pb.Student
(*People)(nil), // 1: pb.People
}
var file_tproto_proto_depIdxs = []int32{
1, // 0: pb.bj38.Say:input_type -> pb.People
0, // 1: pb.bj38.Say:output_type -> pb.Student
1, // [1:2] is the sub-list for method output_type
0, // [0:1] 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_tproto_proto_init() }
func file_tproto_proto_init() {
if File_tproto_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_tproto_proto_msgTypes[0].Exporter = func(v any, i int) any {
switch v := v.(*Student); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_tproto_proto_msgTypes[1].Exporter = func(v any, i int) any {
switch v := v.(*People); 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_tproto_proto_rawDesc,
NumEnums: 0,
NumMessages: 2,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_tproto_proto_goTypes,
DependencyIndexes: file_tproto_proto_depIdxs,
MessageInfos: file_tproto_proto_msgTypes,
}.Build()
File_tproto_proto = out.File
file_tproto_proto_rawDesc = nil
file_tproto_proto_goTypes = nil
file_tproto_proto_depIdxs = nil
}
tproto_grpc.pb.go
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
// versions:
// - protoc-gen-go-grpc v1.5.1
// - protoc v5.27.3
// source: tproto.proto
package pb
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
// Requires gRPC-Go v1.64.0 or later.
const _ = grpc.SupportPackageIsVersion9
const (
Bj38_Say_FullMethodName = "/pb.bj38/Say"
)
// Bj38Client is the client API for Bj38 service.
//
// 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 Bj38Client interface {
Say(ctx context.Context, in *People, opts ...grpc.CallOption) (*Student, error)
}
type bj38Client struct {
cc grpc.ClientConnInterface
}
func NewBj38Client(cc grpc.ClientConnInterface) Bj38Client {
return &bj38Client{cc}
}
func (c *bj38Client) Say(ctx context.Context, in *People, opts ...grpc.CallOption) (*Student, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(Student)
err := c.cc.Invoke(ctx, Bj38_Say_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
// Bj38Server is the server API for Bj38 service.
// All implementations must embed UnimplementedBj38Server
// for forward compatibility.
type Bj38Server interface {
Say(context.Context, *People) (*Student, error)
mustEmbedUnimplementedBj38Server()
}
// UnimplementedBj38Server must be embedded to have
// forward compatible implementations.
//
// NOTE: this should be embedded by value instead of pointer to avoid a nil
// pointer dereference when methods are called.
type UnimplementedBj38Server struct{}
func (UnimplementedBj38Server) Say(context.Context, *People) (*Student, error) {
return nil, status.Errorf(codes.Unimplemented, "method Say not implemented")
}
func (UnimplementedBj38Server) mustEmbedUnimplementedBj38Server() {}
func (UnimplementedBj38Server) testEmbeddedByValue() {}
// UnsafeBj38Server may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to Bj38Server will
// result in compilation errors.
type UnsafeBj38Server interface {
mustEmbedUnimplementedBj38Server()
}
func RegisterBj38Server(s grpc.ServiceRegistrar, srv Bj38Server) {
// If the following call pancis, it indicates UnimplementedBj38Server was
// embedded by pointer and is nil. This will cause panics if an
// unimplemented method is ever invoked, so we test this at initialization
// time to prevent it from happening at runtime later due to I/O.
if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
t.testEmbeddedByValue()
}
s.RegisterService(&Bj38_ServiceDesc, srv)
}
func _Bj38_Say_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(People)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(Bj38Server).Say(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: Bj38_Say_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(Bj38Server).Say(ctx, req.(*People))
}
return interceptor(ctx, in, info, handler)
}
// Bj38_ServiceDesc is the grpc.ServiceDesc for Bj38 service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var Bj38_ServiceDesc = grpc.ServiceDesc{
ServiceName: "pb.bj38",
HandlerType: (*Bj38Server)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Say",
Handler: _Bj38_Say_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "tproto.proto",
}
然后我们编写相应得client和server
server.go
import (
"context"
"go_learn/pb"
"log"
"net"
"google.golang.org/grpc"
)
// server 是 Bj38Server 接口的实现
type server struct {
pb.UnimplementedBj38Server
}
func (s *server) Say(ctx context.Context, in *pb.People) (*pb.Student, error) {
// 实现业务逻辑
return &pb.Student{Name: "Hello, " + in.Name}, nil
}
func main() {
lis, err := net.Listen("tcp", ":50051")
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
s := grpc.NewServer()
pb.RegisterBj38Server(s, &server{})
log.Printf("server listening at %v", lis.Addr())
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v", err)
}
}
client.go
package main
import (
"context"
"go_learn/pb"
"log"
"time"
"google.golang.org/grpc"
)
func main() {
conn, err := grpc.NewClient("localhost:50051", grpc.WithInsecure())
if err != nil {
log.Fatalf("did not connect: %v", err)
}
defer conn.Close()
client := pb.NewBj38Client(conn)
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
// 调用 Say 方法
response, err := client.Say(ctx, &pb.People{Name: "World"})
if err != nil {
log.Fatalf("could not greet: %v", err)
}
log.Printf("Greeting: %s", response.GetName())
}
