dsMin/dsSdsf/Business/Login/CaptchaController/RedisStore.go

package CaptchaController

import (
	"bytes"
	"dsSdsf/Utils/RedisUtil"
	"fmt"
)

//redis键值前缀
var prefix = "captcha_"

//自定验证码的保存到redis，解决因集群负载均衡造成下一个请求无法访问的到的问题
var RedisStoreBean RedisStore //单例模式

type RedisStore struct {
}

func (_redis *RedisStore) Set(captchaId string, digits []byte) {
	//将captchaId和value值写入到redis,并且定义好过期时间，比如120秒
	key := prefix + captchaId
	RedisUtil.SET(key, string(digits), 120)
}
func getValue(captchaId string) (digits []byte) {
	//通过capthcId从redis中读取value值
	key := prefix + captchaId
	value, err := RedisUtil.GET(key)
	if err != nil {
		fmt.Println(err)
		return nil
	} else {
		return []byte(value)
	}
}

func (_redis *RedisStore) Get(captchaId string, clear bool) (digits []byte) {
	return getValue(captchaId)
}

func (_redis *RedisStore) VerifyString(captchaId string, value string) bool {
	key := prefix + captchaId
	digits := getValue(captchaId)
	//这段代码抄自captcha.go源码
	ns := make([]byte, len(value), 8)
	for i := range ns {
		d := value[i]
		switch {
		case '0' <= d && d <= '9':
			ns[i] = d - '0'
		case d == ' ' || d == ',':
			// ignore
		default:
			return false
		}
	}
	//阅后即焚
	RedisUtil.DEL(key)
	//返回两个字节数组的对比结果
	isOk := bytes.Equal(digits, ns)
	return isOk
}