redis_cli.py文件：
　　　　　　　　　　import redis
　　　　　　　　　　Pool= redis.ConnectionPool(host='localhost',port=6379,decode_responses=True)

登录视图文件：
import redis
from utils.redis_cli import Pool    # 创建redis连接池 


class UserLogin(APIView):
    """
        用户登陆认证: 登录成功更新token值，并且返回给前端，登录失败抛出异常提示
    """
    authentication_classes = []   # 登录接口不需要token认证

    def post(self, request, *args, **kwargs):
        username = str(request.data.get("username"))  # 前端需要提交json格式
        password = str(request.data.get("password"))

        try:
            csrf = {}
            user_obj = models.UserInfo.objects.filter(username=username,password=password).first()

            if not user_obj:
                csrf['code'] = 401
                csrf['message'] = "账号或者密码错误"
                return JsonResponse(csrf)

            t = datamd5.md5(username)  # md5给token加密 
            token = t + ":" + username     # token:username  加上用户名标识，
            sr = redis.Redis(connection_pool=Pool)
            sr.hset(username,"token",token)       # 存入格式
            sr.expire(username,10800)      # 3个小时过期
            csrf['token'] = token
            return JsonResponse(csrf)

from rest_framework import exceptions
from rest_framework.authentication import BaseAuthentication #继承认证类


class Authtication(BaseAuthentication):
    def authenticate(self, request):
        try:
            request_token = request.META.get('HTTP_AUTHENTICATE',"")
            print("request_token",request_token)
            token,username = request_token.split(":")  　　　　# 登录视图设置的token有 ：符号
            sr = redis.Redis(connection_pool=Pool)
        except Exception as e:
            raise exceptions.AuthenticationFailed({"code": 405, "error": "请求错误，请重新登录"})

            # 判断登录是否有token
            if not token:
                raise exceptions.AuthenticationFailed({"code": 407,"error":"用户请求异常,未携带token"})

            # 判断 token 正确或者是否过期
            redis_token = sr.hget(username,"token")
            if request_token != redis_token:
                raise exceptions.AuthenticationFailed({"code": 405, "error": "请求错误，请重新登录"})



    def authenticate_header(self, request):
        pass