Go语言，Protobuf 极速入门！

syntax = "proto3";

package main;

message String {
    string value = 1;
}

syntax "proto3";

message Stock {
    reserved 3, 4;
    // ...
}

syntax "proto3";

message Info {
    reserved 2, 9 to 11, 15;
    // ...
}

// Code generated by protoc-gen-go. DO NOT EDIT.
// source: hello.proto

package main

import (
 fmt "fmt"
 proto "github.com/golang/protobuf/proto"
 math "math"
)

// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf

// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package

type String struct {
 Value                *String  `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
 XXX_NoUnkeyedLiteral struct{} `json:"-"`
 XXX_unrecognized     []byte   `json:"-"`
 XXX_sizecache        int32    `json:"-"`
}

func (m *String) Reset()         { *m = String{} }
func (m *String) String() string { return proto.CompactTextString(m) }
func (*String) ProtoMessage()    {}
func (*String) Descriptor() ([]byte, []int) {
 return fileDescriptor_61ef911816e0a8ce, []int{0}
}

func (m *String) XXX_Unmarshal(b []byte) error {
 return xxx_messageInfo_String.Unmarshal(m, b)
}
func (m *String) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 return xxx_messageInfo_String.Marshal(b, m, deterministic)
}
func (m *String) XXX_Merge(src proto.Message) {
 xxx_messageInfo_String.Merge(m, src)
}
func (m *String) XXX_Size() int {
 return xxx_messageInfo_String.Size(m)
}
func (m *String) XXX_DiscardUnknown() {
 xxx_messageInfo_String.DiscardUnknown(m)
}

var xxx_messageInfo_String proto.InternalMessageInfo

func (m *String) GetValue() *String {
 if m != nil {
  return m.Value
 }
 return nil
}

func init() {
 proto.RegisterType((*String)(nil), "main.String")
}

func init() { proto.RegisterFile("hello.proto", fileDescriptor_61ef911816e0a8ce) }

var fileDescriptor_61ef911816e0a8ce = []byte{
 // 84 bytes of a gzipped FileDescriptorProto
 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0xce, 0x48, 0xcd, 0xc9,
 0xc9, 0xd7, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0xc9, 0x4d, 0xcc, 0xcc, 0x53, 0xd2, 0xe1,
 0x62, 0x0b, 0x2e, 0x29, 0xca, 0xcc, 0x4b, 0x17, 0x52, 0xe2, 0x62, 0x2d, 0x4b, 0xcc, 0x29, 0x4d,
 0x95, 0x60, 0x54, 0x60, 0xd4, 0xe0, 0x36, 0xe2, 0xd1, 0x03, 0xc9, 0xeb, 0x41, 0x24, 0x83, 0x20,
 0x52, 0x49, 0x6c, 0x60, 0xad, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x76, 0x0c, 0x0e, 0x54,
 0x49, 0x00, 0x00, 0x00,
}

package main

import (
 "log"
 "net"
 "net/rpc"
 "rpc/protoc"
)

// HelloService is rpc server obj
type HelloService struct{}

//Hello方法的输入参数和输出的参数均改用 Protobuf 定义的 String 类型表示。
//因为新的输入参数为结构体类型，因此改用指针类型作为输入参数，函数的内部代码同时也做了相应的调整。
func (p *HelloService) Hello(request *protoc.String, reply *protoc.String) error {
 reply.Value = "hello:" + request.GetValue()
 return nil
}

func main() {
 rpc.RegisterName("HelloService", new(HelloService))

 listener, err := net.Listen("tcp", ":1234")
 if err != nil {
  log.Fatal("ListenTCP error:", err)
 }

 conn, err := listener.Accept()
 if err != nil {
  log.Fatal("Accept error", err)
 }

 rpc.ServeConn(conn)
}

package main

import (
 "fmt"
 "log"
 "net/rpc"
 "rpc/protoc"
)

func main() {
 client, err := rpc.Dial("tcp", "localhost:1234")
 if err != nil {
  log.Fatal("dialing err:", err)
 }

 var reply = &protoc.String{}
 var param = &protoc.String{
  Value: "hello wekenw",
 }

 err = client.Call("HelloService.Hello", &param, &reply)
 if err != nil {
  log.Fatal(err)
 }
 fmt.Println(reply)
}

$ go run client.go
value:"hello:hello wekenw"