视图函数装饰器通用格式

def deco(view_func):
    def inner(*args, **kwargs):
        print('111')
        res = view_func(*args, **kwargs)
        print(222)
        return res
    return inner


# Create your views here.
@deco
def regist(request):
    print('regist', request.META.get("REMOTE_ADDR"))
    return render(request, "regist.html")

例-黑名单拦截装饰器

black_list = ["127.0.0.1", "127.1.1.1"]
# 阻止黑名单装饰器
def stop_black_list(func):
    def inner(request, *args, **kwargs):
        # 获取访问者的ip
        remote_addr = request.META.get("REMOTE_ADDR")
        # 黑名单验证
        if remote_addr in black_list:
            return HttpResponse("22非法用户，禁止访问")
        # 主程序执行
        res = func(request, *args, **kwargs)
        return res
    return inner