grpc客户端和服务端利用protoc进行通信

./message/message.proto

syntax = "proto3";

option go_package="./;message";

package message;
//订单请求参数
message OrderRequest {
  string orderId = 1; //1,2编号
  int64 timeStamp = 2;
}
//订单信息
message OrderInfo {
  string OrderId = 1;
  string OrderName = 2;
  string OrderStatus = 3;
}
//订单服务service定义
service OrderService{
  rpc GetOrderInfo(OrderRequest) returns (OrderInfo);
}

//运行：protoc --go_out=plugins=grpc:. message.proto
//生成：message.pb.go

./message.pb.go

// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
//     protoc-gen-go v1.26.0
//     protoc        v3.19.0
// source: message.proto

package message

import (
    context "context"
    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)
)

//订单请求参数
type OrderRequest struct {
    state         protoimpl.MessageState
    sizeCache     protoimpl.SizeCache
    unknownFields protoimpl.UnknownFields

    OrderId   string `protobuf:"bytes,1,opt,name=orderId,proto3" json:"orderId,omitempty"` //1,2编号
    TimeStamp int64  `protobuf:"varint,2,opt,name=timeStamp,proto3" json:"timeStamp,omitempty"`
}

func (x *OrderRequest) Reset() {
    *x = OrderRequest{}
    if protoimpl.UnsafeEnabled {
        mi := &file_message_proto_msgTypes[0]
        ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
        ms.StoreMessageInfo(mi)
    }
}

func (x *OrderRequest) String() string {
    return protoimpl.X.MessageStringOf(x)
}

func (*OrderRequest) ProtoMessage() {}

func (x *OrderRequest) ProtoReflect() protoreflect.Message {
    mi := &file_message_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 OrderRequest.ProtoReflect.Descriptor instead.
func (*OrderRequest) Descriptor() ([]byte, []int) {
    return file_message_proto_rawDescGZIP(), []int{0}
}

func (x *OrderRequest) GetOrderId() string {
    if x != nil {
        return x.OrderId
    }
    return ""
}

func (x *OrderRequest) GetTimeStamp() int64 {
    if x != nil {
        return x.TimeStamp
    }
    return 0
}

//订单信息
type OrderInfo struct {
    state         protoimpl.MessageState
    sizeCache     protoimpl.SizeCache
    unknownFields protoimpl.UnknownFields

    OrderId     string `protobuf:"bytes,1,opt,name=OrderId,proto3" json:"OrderId,omitempty"`
    OrderName   string `protobuf:"bytes,2,opt,name=OrderName,proto3" json:"OrderName,omitempty"`
    OrderStatus string `protobuf:"bytes,3,opt,name=OrderStatus,proto3" json:"OrderStatus,omitempty"`
}

func (x *OrderInfo) Reset() {
    *x = OrderInfo{}
    if protoimpl.UnsafeEnabled {
        mi := &file_message_proto_msgTypes[1]
        ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
        ms.StoreMessageInfo(mi)
    }
}

func (x *OrderInfo) String() string {
    return protoimpl.X.MessageStringOf(x)
}

func (*OrderInfo) ProtoMessage() {}

func (x *OrderInfo) ProtoReflect() protoreflect.Message {
    mi := &file_message_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 OrderInfo.ProtoReflect.Descriptor instead.
func (*OrderInfo) Descriptor() ([]byte, []int) {
    return file_message_proto_rawDescGZIP(), []int{1}
}

func (x *OrderInfo) GetOrderId() string {
    if x != nil {
        return x.OrderId
    }
    return ""
}

func (x *OrderInfo) GetOrderName() string {
    if x != nil {
        return x.OrderName
    }
    return ""
}

func (x *OrderInfo) GetOrderStatus() string {
    if x != nil {
        return x.OrderStatus
    }
    return ""
}

var File_message_proto protoreflect.FileDescriptor

var file_message_proto_rawDesc = []byte{
    0x0a, 0x0d, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
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}

var (
    file_message_proto_rawDescOnce sync.Once
    file_message_proto_rawDescData = file_message_proto_rawDesc
)

func file_message_proto_rawDescGZIP() []byte {
    file_message_proto_rawDescOnce.Do(func() {
        file_message_proto_rawDescData = protoimpl.X.CompressGZIP(file_message_proto_rawDescData)
    })
    return file_message_proto_rawDescData
}

var file_message_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_message_proto_goTypes = []interface{}{
    (*OrderRequest)(nil), // 0: message.OrderRequest
    (*OrderInfo)(nil),    // 1: message.OrderInfo
}
var file_message_proto_depIdxs = []int32{
    0, // 0: message.OrderService.GetOrderInfo:input_type -> message.OrderRequest
    1, // 1: message.OrderService.GetOrderInfo:output_type -> message.OrderInfo
    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_message_proto_init() }
func file_message_proto_init() {
    if File_message_proto != nil {
        return
    }
    if !protoimpl.UnsafeEnabled {
        file_message_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
            switch v := v.(*OrderRequest); i {
            case 0:
                return &v.state
            case 1:
                return &v.sizeCache
            case 2:
                return &v.unknownFields
            default:
                return nil
            }
        }
        file_message_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
            switch v := v.(*OrderInfo); 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_message_proto_rawDesc,
            NumEnums:      0,
            NumMessages:   2,
            NumExtensions: 0,
            NumServices:   1,
        },
        GoTypes:           file_message_proto_goTypes,
        DependencyIndexes: file_message_proto_depIdxs,
        MessageInfos:      file_message_proto_msgTypes,
    }.Build()
    File_message_proto = out.File
    file_message_proto_rawDesc = nil
    file_message_proto_goTypes = nil
    file_message_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

// OrderServiceClient is the client API for OrderService service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
type OrderServiceClient interface {
    GetOrderInfo(ctx context.Context, in *OrderRequest, opts ...grpc.CallOption) (*OrderInfo, error)
}

type orderServiceClient struct {
    cc grpc.ClientConnInterface
}

func NewOrderServiceClient(cc grpc.ClientConnInterface) OrderServiceClient {
    return &orderServiceClient{cc}
}

func (c *orderServiceClient) GetOrderInfo(ctx context.Context, in *OrderRequest, opts ...grpc.CallOption) (*OrderInfo, error) {
    out := new(OrderInfo)
    err := c.cc.Invoke(ctx, "/message.OrderService/GetOrderInfo", in, out, opts...)
    if err != nil {
        return nil, err
    }
    return out, nil
}

// OrderServiceServer is the server API for OrderService service.
type OrderServiceServer interface {
    GetOrderInfo(context.Context, *OrderRequest) (*OrderInfo, error)
}

// UnimplementedOrderServiceServer can be embedded to have forward compatible implementations.
type UnimplementedOrderServiceServer struct {
}

func (*UnimplementedOrderServiceServer) GetOrderInfo(context.Context, *OrderRequest) (*OrderInfo, error) {
    return nil, status.Errorf(codes.Unimplemented, "method GetOrderInfo not implemented")
}

func RegisterOrderServiceServer(s *grpc.Server, srv OrderServiceServer) {
    s.RegisterService(&_OrderService_serviceDesc, srv)
}

func _OrderService_GetOrderInfo_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
    in := new(OrderRequest)
    if err := dec(in); err != nil {
        return nil, err
    }
    if interceptor == nil {
        return srv.(OrderServiceServer).GetOrderInfo(ctx, in)
    }
    info := &grpc.UnaryServerInfo{
        Server:     srv,
        FullMethod: "/message.OrderService/GetOrderInfo",
    }
    handler := func(ctx context.Context, req interface{}) (interface{}, error) {
        return srv.(OrderServiceServer).GetOrderInfo(ctx, req.(*OrderRequest))
    }
    return interceptor(ctx, in, info, handler)
}

var _OrderService_serviceDesc = grpc.ServiceDesc{
    ServiceName: "message.OrderService",
    HandlerType: (*OrderServiceServer)(nil),
    Methods: []grpc.MethodDesc{
        {
            MethodName: "GetOrderInfo",
            Handler:    _OrderService_GetOrderInfo_Handler,
        },
    },
    Streams:  []grpc.StreamDesc{},
    Metadata: "message.proto",
}

./Client.go

package main

import (
    "WLBC/GRPC2/message"
    "context"
    "fmt"
    "google.golang.org/grpc"
    "time"
)

func main(){
    conn, err := grpc.Dial("localhost:8090", grpc.WithInsecure())
    if err != nil {
        panic(err.Error())
    }
    defer conn.Close()

    orderServiceClient := message.NewOrderServiceClient(conn)
    orderRequest := &message.OrderRequest{OrderId: "201907300001", TimeStamp: time.Now().Unix()}
    orderInfo, err := orderServiceClient.GetOrderInfo(context.Background(), orderRequest)
    if orderInfo != nil {
        fmt.Println(orderInfo.GetOrderId())
        fmt.Println(orderInfo.GetOrderName())
        fmt.Println(orderInfo.GetOrderStatus())
    }
}

./Server.go

package main

import (
    "WLBC/GRPC2/message"
    "context"
    "errors"
    "fmt"
    "google.golang.org/grpc"
    "net"
    "time"
)

type OrderServiceImpl struct {
}

//具体的方法实现
func (os *OrderServiceImpl) GetOrderInfo(ctx context.Context, request *message.OrderRequest) (*message.OrderInfo, error) {
    orderMap := map[string]message.OrderInfo{
        "201907300001": message.OrderInfo{OrderId: "201907300001", OrderName: "衣服", OrderStatus: "已付款"},
        "201907310001": message.OrderInfo{OrderId: "201907310001", OrderName: "零食", OrderStatus: "已付款"},
        "201907310002": message.OrderInfo{OrderId: "201907310002", OrderName: "食品", OrderStatus: "未付款"},
    }
    var response *message.OrderInfo
    current := time.Now().Unix()
    if request.TimeStamp > current {
        *response = message.OrderInfo{OrderId: "0", OrderName: "", OrderStatus: "订单信息异常"}
    } else {
        result := orderMap[request.OrderId]
        if result.OrderId != "" {
            fmt.Println(result)
            return &result, nil
        } else {
            return nil, errors.New("server error")
        }
    }
    return response, nil
}

func main() {
    server := grpc.NewServer()
    message.RegisterOrderServiceServer(server, new(OrderServiceImpl))
    lis, err := net.Listen("tcp", ":8090")
    if err != nil {
        panic(err.Error())
    }
    server.Serve(lis)
}