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 }

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