protobuf的使用
作者：互联网
先上官方使用文档 https://developers.google.cn/protocol-buffers/docs/proto3
- 定义proto文件
syntax = "proto3";
//.表示生成的go文件存放到当前目录下 student表示文件的包名为student option go_package=".;student";
//定义枚举类型 enum Sex{ man = 0; woman = 2; } message Person { string name = 1; //定义枚举类型 Sex sex = 2; } message Student { int32 score = 1; //嵌套类型 Person p = 2; //切片数组定义 repeated string like = 3; } message StuReq { int32 id = 1; } service stuService{ rpc GetInfo(StuReq) returns (Student); }
- 执行生成go文件命令
不带注册服务的编译
protoc --go_out=./ *.proto
带注册服务的编译(只适用在grpc中)
protoc --go_out=plugins=grpc:./ *.proto
其中 --go_out 表示输出目录，生成文件如下
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.25.0
// protoc v3.15.5
// source: student.proto
package student
import (
context "context"
proto "github.com/golang/protobuf/proto"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
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)
)
// 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 Sex int32
const (
Sex_man Sex = 0
Sex_woman Sex = 2
)
// Enum value maps for Sex.
var (
Sex_name = map[int32]string{
0: "man",
2: "woman",
}
Sex_value = map[string]int32{
"man": 0,
"woman": 2,
}
)
func (x Sex) Enum() *Sex {
p := new(Sex)
*p = x
return p
}
func (x Sex) String() string {
return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
}
func (Sex) Descriptor() protoreflect.EnumDescriptor {
return file_student_proto_enumTypes[0].Descriptor()
}
func (Sex) Type() protoreflect.EnumType {
return &file_student_proto_enumTypes[0]
}
func (x Sex) Number() protoreflect.EnumNumber {
return protoreflect.EnumNumber(x)
}
// Deprecated: Use Sex.Descriptor instead.
func (Sex) EnumDescriptor() ([]byte, []int) {
return file_student_proto_rawDescGZIP(), []int{0}
}
type Person struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
//定义枚举类型
Sex Sex `protobuf:"varint,2,opt,name=sex,proto3,enum=Sex" json:"sex,omitempty"`
}
func (x *Person) Reset() {
*x = Person{}
if protoimpl.UnsafeEnabled {
mi := &file_student_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Person) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Person) ProtoMessage() {}
func (x *Person) ProtoReflect() protoreflect.Message {
mi := &file_student_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 Person.ProtoReflect.Descriptor instead.
func (*Person) Descriptor() ([]byte, []int) {
return file_student_proto_rawDescGZIP(), []int{0}
}
func (x *Person) GetName() string {
if x != nil {
return x.Name
}
return ""
}
func (x *Person) GetSex() Sex {
if x != nil {
return x.Sex
}
return Sex_man
}
type Student struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Score int32 `protobuf:"varint,1,opt,name=score,proto3" json:"score,omitempty"`
//嵌套类型
P *Person `protobuf:"bytes,2,opt,name=p,proto3" json:"p,omitempty"`
//切片数组定义
Like []string `protobuf:"bytes,3,rep,name=like,proto3" json:"like,omitempty"`
}
func (x *Student) Reset() {
*x = Student{}
if protoimpl.UnsafeEnabled {
mi := &file_student_proto_msgTypes[1]
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_student_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 Student.ProtoReflect.Descriptor instead.
func (*Student) Descriptor() ([]byte, []int) {
return file_student_proto_rawDescGZIP(), []int{1}
}
func (x *Student) GetScore() int32 {
if x != nil {
return x.Score
}
return 0
}
func (x *Student) GetP() *Person {
if x != nil {
return x.P
}
return nil
}
func (x *Student) GetLike() []string {
if x != nil {
return x.Like
}
return nil
}
type StuReq struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Id int32 `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
}
func (x *StuReq) Reset() {
*x = StuReq{}
if protoimpl.UnsafeEnabled {
mi := &file_student_proto_msgTypes[2]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *StuReq) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StuReq) ProtoMessage() {}
func (x *StuReq) ProtoReflect() protoreflect.Message {
mi := &file_student_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 StuReq.ProtoReflect.Descriptor instead.
func (*StuReq) Descriptor() ([]byte, []int) {
return file_student_proto_rawDescGZIP(), []int{2}
}
func (x *StuReq) GetId() int32 {
if x != nil {
return x.Id
}
return 0
}
var File_student_proto protoreflect.FileDescriptor
var file_student_proto_rawDesc = []byte{
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0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
}
var (
file_student_proto_rawDescOnce sync.Once
file_student_proto_rawDescData = file_student_proto_rawDesc
)
func file_student_proto_rawDescGZIP() []byte {
file_student_proto_rawDescOnce.Do(func() {
file_student_proto_rawDescData = protoimpl.X.CompressGZIP(file_student_proto_rawDescData)
})
return file_student_proto_rawDescData
}
var file_student_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
var file_student_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
var file_student_proto_goTypes = []interface{}{
(Sex)(0), // 0: Sex
(*Person)(nil), // 1: Person
(*Student)(nil), // 2: Student
(*StuReq)(nil), // 3: StuReq
}
var file_student_proto_depIdxs = []int32{
0, // 0: Person.sex:type_name -> Sex
1, // 1: Student.p:type_name -> Person
3, // 2: stuService.GetInfo:input_type -> StuReq
2, // 3: stuService.GetInfo:output_type -> Student
3, // [3:4] is the sub-list for method output_type
2, // [2:3] is the sub-list for method input_type
2, // [2:2] is the sub-list for extension type_name
2, // [2:2] is the sub-list for extension extendee
0, // [0:2] is the sub-list for field type_name
}
func init() { file_student_proto_init() }
func file_student_proto_init() {
if File_student_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_student_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Person); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_student_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Student); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_student_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*StuReq); 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_student_proto_rawDesc,
NumEnums: 1,
NumMessages: 3,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_student_proto_goTypes,
DependencyIndexes: file_student_proto_depIdxs,
EnumInfos: file_student_proto_enumTypes,
MessageInfos: file_student_proto_msgTypes,
}.Build()
File_student_proto = out.File
file_student_proto_rawDesc = nil
file_student_proto_goTypes = nil
file_student_proto_depIdxs = nil
}
// Reference imports to suppress errors if they are not otherwise used.
var _ context.Context
var _ grpc.ClientConnInterface
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion6
// StuServiceClient is the client API for StuService service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
type StuServiceClient interface {
GetInfo(ctx context.Context, in *StuReq, opts ...grpc.CallOption) (*Student, error)
}
type stuServiceClient struct {
cc grpc.ClientConnInterface
}
func NewStuServiceClient(cc grpc.ClientConnInterface) StuServiceClient {
return &stuServiceClient{cc}
}
func (c *stuServiceClient) GetInfo(ctx context.Context, in *StuReq, opts ...grpc.CallOption) (*Student, error) {
out := new(Student)
err := c.cc.Invoke(ctx, "/stuService/GetInfo", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// StuServiceServer is the server API for StuService service.
type StuServiceServer interface {
GetInfo(context.Context, *StuReq) (*Student, error)
}
// UnimplementedStuServiceServer can be embedded to have forward compatible implementations.
type UnimplementedStuServiceServer struct {
}
func (*UnimplementedStuServiceServer) GetInfo(context.Context, *StuReq) (*Student, error) {
return nil, status.Errorf(codes.Unimplemented, "method GetInfo not implemented")
}
func RegisterStuServiceServer(s *grpc.Server, srv StuServiceServer) {
s.RegisterService(&_StuService_serviceDesc, srv)
}
func _StuService_GetInfo_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(StuReq)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(StuServiceServer).GetInfo(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/stuService/GetInfo",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(StuServiceServer).GetInfo(ctx, req.(*StuReq))
}
return interceptor(ctx, in, info, handler)
}
var _StuService_serviceDesc = grpc.ServiceDesc{
ServiceName: "stuService",
HandlerType: (*StuServiceServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "GetInfo",
Handler: _StuService_GetInfo_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "student.proto",
}
标签：file,return,protobuf,proto,protoimpl,student,使用,func 来源： https://www.cnblogs.com/itsuibi/p/14726558.html