golang中使用protobuf

1. 下载protoc

• 可以去https://github.com/google/protobuf/releases下载源码自己编译
• 或者https://github.com/google/protobuf/releases去下载编译好的二进制文件

2. 安装protoc-gen-go

go get github.com/golang/protobuf/protoc-gen-go

安装好了之后, 在$GOPATH/bin下面会找到protoc-gen-go.exe

3. 使用protoc.exe 和 protoc-gen-go.exe 生成协议代码

protoc --proto_path=./proto  --go_out=./src_gen/go/    scoreserver/score_info.proto

注意使用的时候, protoc.exe和protoc-gen-go.exe要放在同一个目录下，或者二者的路径都放入环境变量PATH里面

4. 安装protobuf库

go get github.com/golang/protobuf/proto

5. 测试代码

• proto
  score_info.proto

syntax = "proto2";

package score_server;


/** 
 * @brief base_score_info
 */
message base_score_info_t{
    optional    int32       win_count = 1;                  // 玩家胜局局数
    optional    int32       lose_count = 2;                 // 玩家负局局数
    optional    int32       exception_count = 3;            // 玩家异常局局数
    optional    int32       kill_count = 4;                 // 总人头数
    optional    int32       death_count = 5;                // 总死亡数
    optional    int32       assist_count = 6;               // 总总助攻数
    optional    int64       rating = 7;                     // 评价积分
}

• 测试代码

// pb_test project main.go
package main

import (
    "fmt"

    "proto/scoreserver"

    "github.com/golang/protobuf/proto"
)

func main() {
    score_info := &score_server.BaseScoreInfoT{}
    score_info.WinCount = new(int32)
    *score_info.WinCount = 1
    score_info.LoseCount = new(int32)
    *score_info.LoseCount = 2
    score_info.ExceptionCount = new(int32)
    *score_info.ExceptionCount = 3
    score_info.KillCount = new(int32)
    *score_info.KillCount = 4
    score_info.DeathCount = new(int32)
    *score_info.DeathCount = 5
    score_info.AssistCount = new(int32)
    *score_info.AssistCount = 6
    score_info.Rating = new(int64)
    *score_info.Rating = 1800

    fmt.Printf("original data{%s}\n", score_info.String())

    // encode
    data, err := proto.Marshal(score_info)
    if err != nil {
        fmt.Printf("proto encode error[%s]\n", err.Error())
        return
    }

    // decode
    score_info_1 := &score_server.BaseScoreInfoT{}
    err = proto.Unmarshal(data, score_info_1)
    if err != nil {
        fmt.Printf("proto decode error[%s]\n", err.Error())
        return
    }

    *score_info_1.Rating = 2000
    fmt.Printf("after decode:{%s}\n", score_info_1.String())
}

代码运行结果:

original data{win_count:1 lose_count:2 exception_count:3 kill_count:4 death_count:5 assist_count:6 rating:1800 }
after decode:{win_count:1 lose_count:2 exception_count:3 kill_count:4 death_count:5 assist_count:6 rating:2000 }