在ChatGPT 帮助下我利用golang和redis 快速实现了一个缓存服务解决方案

package main

import (
    "context"
    "fmt"
    "time"

    "github.com/go-redis/redis/v8"
)

var (
    redisClient *redis.Client
    ctx         = context.Background()
)

func init() {
    redisClient = redis.NewClient(&redis.Options{
        Addr:     "localhost:16379", // redis服务地址
        Password: "",               // redis连接密码
        DB:       0,                // redis数据库编号
    })
}

// GetRequestHeader 你需要缓存的函数
func GetRequestHeader(url, referer, userAgent string) string {
    // 这里是实现你需要缓存的函数的代码逻辑
    fmt.Println("The function is called...")
    time.Sleep(10 * time.Second)

    // 返回该函数的结果
    return fmt.Sprintf("url=%s, referer=%s, userAgent=%s", url, referer, userAgent)
}

// CacheFunc 基于redis缓存的函数执行结果
func CacheFunc(fn func(string, string, string) string, expire time.Duration) func(string, string, string) string {
    return func(url, referer, userAgent string) string {
        key := fmt.Sprintf("%s_%s_%s", url, referer, userAgent)
        res, err := redisClient.Get(ctx, key).Result()
        if err == redis.Nil {
            // 缓存中没有命中，则执行函数并缓存结果
            res = fn(url, referer, userAgent)
            if err := redisClient.Set(ctx, key, res, expire).Err(); err != nil {
                panic(err)
            }
        } else if err != nil {
            panic(err)
        }
        return res
    }
}

func main() {
    // 缓存有效期，可以根据实际情况进行调整
    expire := 5 * time.Second

    // 基于redis缓存函数执行结果
    cachedFunc := CacheFunc(GetRequestHeader, expire)

    // 调用函数
    url := "https://www.example.com"
    referer := "https://www.google.com"
    userAgent := "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36"
    res1 := cachedFunc(url, referer, userAgent)
    fmt.Println("Result 1:", res1)

    // 等待一段时间，再次调用函数
    time.Sleep(0 * time.Second)
    res2 := cachedFunc(url, referer, userAgent)
    fmt.Println("Result 2:", res2)

    // 等待一段时间，再次调用函数
    time.Sleep(6 * time.Second)
    res3 := cachedFunc(url, referer, userAgent)
    fmt.Println("Result 3:", res3)
}