Go 言語と Redis を使用してオンライン音楽プレーヤーを開発する方法

- music_player
    - main.go
    - controllers
        - music_controller.go
    - models
        - music.go
    - utils
        - redis.go

package controllers

import (
    "net/http"
    "github.com/gin-gonic/gin"
    "music_player/models"
    "music_player/utils"
)

type MusicController struct {
}

func (mc *MusicController) GetMusic(c *gin.Context) {
    // 获取音乐列表
    musicList := models.GetMusicList()

    // 将音乐列表存入Redis
    err := utils.SaveToRedis("music_list", musicList)
    if err != nil {
        c.JSON(http.StatusInternalServerError, gin.H{"message": "获取音乐列表失败"})
        return
    }

    c.JSON(http.StatusOK, gin.H{"message": "获取音乐列表成功", "music_list": musicList})
}

func (mc *MusicController) PlayMusic(c *gin.Context) {
    // 获取音乐ID
    musicID := c.Param("id")

    // 从Redis获取音乐URL
    musicURL, err := utils.GetFromRedis(musicID)
    if err != nil {
        c.JSON(http.StatusInternalServerError, gin.H{"message": "获取音乐URL失败"})
        return
    }

    c.JSON(http.StatusOK, gin.H{"message": "播放音乐", "music_url": musicURL})
}

package models

type Music struct {
    ID   string `json:"id"`
    Name string `json:"name"`
    URL  string `json:"url"`
}

func GetMusicList() []Music {
    // 模拟获取音乐列表
    return []Music{
        {ID: "1", Name: "歌曲1", URL: "http://example.com/music1.mp3"},
        {ID: "2", Name: "歌曲2", URL: "http://example.com/music2.mp3"},
        {ID: "3", Name: "歌曲3", URL: "http://example.com/music3.mp3"},
    }
}

package utils

import (
    "errors"
    "github.com/go-redis/redis"
)

var client *redis.Client

func init() {
    // 初始化Redis客户端
    client = redis.NewClient(&redis.Options{
        Addr:     "localhost:6379",
        Password: "",
        DB:       0,
    })
}

func SaveToRedis(key string, value interface{}) error {
    // 将值存入Redis
    err := client.Set(key, value, 0).Err()
    if err != nil {
        return err
    }
    return nil
}

func GetFromRedis(key string) (interface{}, error) {
    // 从Redis获取值
    value, err := client.Get(key).Result()
    if err == redis.Nil {
        return nil, errors.New("key does not exist")
    } else if err != nil {
        return nil, err
    }
    return value, nil
}

package main

import (
    "github.com/gin-gonic/gin"
    "music_player/controllers"
)

func main() {
    // 创建Gin路由
    r := gin.Default()

    // 创建音乐播放器控制器实例
    mc := &controllers.MusicController{}

    // 定义路由规则
    r.GET("/music", mc.GetMusic)
    r.GET("/music/:id", mc.PlayMusic)

    // 启动HTTP服务器
    r.Run(":8080")
}