我的第一个go程序

package main

import (
    "fmt"
    "github.com/go-redis/redis"
    "github.com/golang/protobuf/proto"
    "github.com/user/appcpi/game/protobuf/game_data"
    "os"
    "log"
    //"unsafe"
    "encoding/json"
)

func checkFile(filename string) {
    _, err := os.Stat(filename)
    if err == nil {
        os.Remove(filename)
    }

}

func createFileAndWrite(filename string, data []byte) {
    checkFile(filename)
    file, err := os.Create(filename)
    if err != nil {
        log.Fatal("create %s err:%s \n", filename, err)
    }
    file.Write(data)
    /*if err != nil {
        log.Fatal("write len(data)=%d err:%s \n", data, err)
    }*/
    file.Close()
}

func parseGameProto(data string) []byte{
    game_data := &APPCPI_GAME.GameData{}
    err := proto.Unmarshal([]byte(data), game_data)
    if err != nil {
        log.Fatal("GameData Unmarshal err: %s\n", err)
    }

    result, err := json.MarshalIndent(game_data, "", "    ")
    if err != nil {
        log.Fatal("GameData arshalIndent err: %s\n", err)
    }

    return result
}

func parseTicketProto(data string) []byte{
    ticket := &APPCPI_GAME.TicketInfo{}
    err := proto.Unmarshal([]byte(data), ticket)
    if err != nil {
        log.Fatal("ticket Unmarshal err: %s\n", err)
    }

    result, err := json.MarshalIndent(ticket, "", "    ")
    if err != nil {
        log.Fatal("ticket arshalIndent err: %s\n", err)
    }
    return result
}

func getRecord(client *redis.Client, id string) {
    data, err := client.HGetAll(id).Result()
    if err != nil {
        log.Fatal("HGetAll(%s) err: %s\n", id, err)
    }
    for k,v := range(data) {
        fmt.Printf("k:%s len(v):%d\n", k, len(v))
        if k == "game" {
            createFileAndWrite(id + "_game.txt", parseGameProto(v))

        } else if k == "ticket" {
            createFileAndWrite(id + "_ticket.txt", parseTicketProto(v))
        }
    }
}

func main() {

    argv := os.Args[1:]
    if len(argv) < 1 {
        fmt.Printf("Usage:%s [user_id] {IP} {PORT}\n", os.Args[0])
        os.Exit(0)
    }

    var Addr string
    if len(argv) >= 3 {
        Addr += argv[1]
        Addr += ":"
        Addr += argv[2]
    } else {
        Addr = "127.0.0.1:7003"
    }

    client := redis.NewClient(&redis.Options{
        Addr:     Addr,
        Password: "", // no password set
        DB:       0,  // use default DB
    })

    //fmt.Printf("type:%s\n", unsafe.Sizeof(client))

    _, err := client.Ping().Result()
    if err != nil {
        log.Fatal("redis ping err:%s \n", err)
    }
    //fmt.Println(pong, err)
    getRecord(client, argv[0])
}

解释

1. 从输入获取要查找的键值及Redis的IP和Port
2. 连接Redis
3. 从Redis获取Hash数据
4. 将Hash数据根据Key,处理相应的value，将其转换成Proto格式
5. 将Proto格式以转换成可阅读的格式输出到文件

技术点

1. Redis操作
2. Protobuf操作
3. 文件操作
4. 其他基本操作

go新手，有疑问的可以评论共同学习。。