django-视图CBV模式、CBV结合装饰器、csrf

CBV与装饰器整合实战

最新推荐文章于 2023-11-24 21:33:16 发布

BigC哥

最新推荐文章于 2023-11-24 21:33:16 发布

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分类专栏： django

本文链接：https://blog.youkuaiyun.com/weixin_43063753/article/details/85317109

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本文详细介绍了如何在Django框架中使用类视图(CBV)与装饰器结合进行视图开发，包括直接在视图类上应用装饰器、在特定方法如get或post上使用，以及在dispatch方法上添加装饰器的技巧。同时，探讨了CSRFToken在CBV中的正确使用方式。

使用cbv实现视图
CBV结合装饰器
CSRF Token

使用cbv实现视图

from django.views import View
from django.utils.decorators import method_decorator


class LoginView(View):

    def get(self, request):
        return render(request, "login.html")

    def post(self, request):
        user = request.POST.get("name")
        pwd = request.POST.get("pwd")
        if user == "safly" and pwd == "123":
            # 登陆成功
            # 写session
            request.session["user2"] = user
            request.session.set_expiry(5)
            return redirect("/index/")

def index(request):
    return render(request,"index.html")
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CBV结合装饰器

直接加在视图类上，但method_decorator必须传 name 关键字参数

from django.views import View
from django.utils.decorators import method_decorator


def wrapper(func):
    @wraps(func)
    def inner(request, *args, **kwargs):
        # 登录校验
        cookie_k = request.session.get("user01", None)
        if cookie_k:
            # 表示已经登录的用户
            ret = func(request, *args, **kwargs)
            return ret
        else:
            # 滚去登录
            return redirect("/login/")

    return inner


class LoginView(View):

    def get(self, request):
        return render(request, "login.html")

    def post(self, request):
        user = request.POST.get("name")
        pwd = request.POST.get("pwd")
        if user == "safly" and pwd == "123":
            # 登陆成功
            # 写session
            request.session["user01"] = user
            # request.session.set_expiry(5)
            return redirect("/index/")


@method_decorator(wrapper, name="get")
class IndexView(View):
    def get(self, request):
        user = request.session.get("user01", "游客")
        return render(request, "index.html", {"user": user})
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* 加在CBV视图的get或post方法上*

# @method_decorator(wrapper, name="get")
class IndexView(View):
    @method_decorator(wrapper)
    def get(self, request):
        user = request.session.get("user02", "游客")
        return render(request, "index.html", {"user": user})

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* 加在dispatch方法上*

# @method_decorator(wrapper, name="get")
class IndexView(View):
    ## 这么写所有的请求方法都要做登录校验
    @method_decorator(wrapper)
    def dispatch(self, request, *args, **kwargs):
        return super(IndexView,self).dispatch(request,*args,**kwargs)

    # @method_decorator(wrapper)
    def get(self, request):
        user = request.session.get("user04", "游客")
        return render(request, "index.html", {"user": user})

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CSRF Token

CSRF Token相关装饰器在CBV只能加到dispatch方法上

备注：

csrf_protect，为当前函数强制设置防跨站请求伪造功能，即便settings中没有设置全局中间件。
csrf_exempt，取消当前函数防跨站请求伪造功能，即便settings中设置了全局中间件

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from django.views.decorators.csrf import csrf_exempt, csrf_protect


class HomeView(View):

    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return super(HomeView, self).dispatch(request, *args, **kwargs)

    def get(self, request):
        return render(request, "home.html")

    def post(self, request):
        print("Home View POST method...")
        return redirect("/index/")
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