Python自动化之模板继承和cookie

时间：2025-04-14 17:37:20

request请求头信息

type(request) //查看类

from django.core.handlers.wsgi import WSGIRequest

结果会以字典的形式存在

request.environ封装了用户所有请求信息

模板继承

主模板

{% block content %}

{<% endblock %}

字模板

开头导入

{% extends "master.html" %}

{% block content %}

内容

{% endblock %}

导入其他标签

{% include "master.html" %}

主模板可以渲染

simple_tag

  1. 在app下新建一个templatetags目录,建一个py文件.
  2. from django import template

    from django.utils.safestring import mark_safe

    register = template.Library()

    @register.simple_tag
  3. 在主模板添加{% load py文件名%}称 ,{% 函数名称 %}}

例1:没有参数

tianqi.py

--------------

def number():

	return 123

主模板

{% load tianqi %}

{% number %}

例2:有参数

tianqi.py

--------------

def number(a1,a2):

	return 123

主模板

{% load tianqi %}

{% number a1 a2 %}

可以加很多参数,不可以加到if语句里,例如{% if number a1 a2 %}是不允许的

例2:有参数

@register.filter

def number1(a1,a2):

	return 123

{{ "123"|number1:"456" }}

最多支持2个参数,但是支持{% if "123"|number1:"456" %}

cookie

cookie是客户端的一个小文件

应用场景:用户登录认证

def login(request):

    if request.method == "GET":

        return render(request,'login.html')

    if request.method == "POST":

        u = request.POST.get('username')

        p = request.POST.get('pwd')

        dic = user_info.get(u)

        if not dic:

            return render(request,'login.html')

        if dic['pwd'] == p:

            res = redirect('/index/')

            # res.set_cookie('username111',u,max_age=10)

            # import datetime

            # current_date = datetime.datetime.utcnow()

            # current_date = current_date + datetime.timedelta(seconds=5)

            # res.set_cookie('username111',u,expires=current_date)

            res.set_cookie('username111',u)

            res.set_cookie('user_type',"asdfjalskdjf",httponly=True)

            return res

        else:

            return render(request,'login.html')

def index(reqeust):

# 获取当前已经登录的用户

    v = reqeust.COOKIES.get('username111')

    return render(reqeust,'index.html',{'current_user': v})

res.set_cookie('username111',u)设置cookie

v = reqeust.COOKIES.get('username111')获取cookie

关闭浏览器cookie失效

参数：

        key,              键

        value='',         值

        max_age=None,     超时时间

        expires=None,     超时时间(IE requires expires, so set it if hasn't been already.)

        path='/',         Cookie生效的路径，/ 表示根路径，特殊的：跟路径的cookie可以被任何url的页面访问

        domain=None,      Cookie生效的域名

        secure=False,     https传输

        httponly=False    只能http协议传输，无法被JavaScript获取（不是绝对，底层抓包可以获取到也可以被覆盖）

加密cookie

obj.set_signed_cookie('username',"kangbazi",salt="asdfasdf")

request.get_signed_cookie('username',salt="asdfasdf")

jquery cookies

var v = $.cookie('per_page_count', {'path': "/user_list/`"});

FBV装饰器

	- 装饰器

		FBV:

			def auth(func):

				def inner(reqeust,*args,**kwargs):

					v = reqeust.COOKIES.get('username111')

					if not v:

						return redirect('/login/')

					return func(reqeust, *args,**kwargs)

				return inner

CBV装饰器

CBV:

from django import views

from django.utils.decorators import method_decorator

			@method_decorator(auth,name='dispatch')

			class Order(views.View):

				# @method_decorator(auth)

				# def dispatch(self, request, *args, **kwargs):

				#     return super(Order,self).dispatch(request, *args, **kwargs)

				# @method_decorator(auth)

				def get(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

				def post(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

第一种写法

			from django import views

			from django.utils.decorators import method_decorator

			class Order(views.View):

				@method_decorator(auth)

				def get(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

				@method_decorator(auth)

				def post(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

第二种写法

			from django import views

			from django.utils.decorators import method_decorator

			class Order(views.View):

				@method_decorator(auth)

				def dispatch(self, request, *args, **kwargs):

				    return super(Order,self).dispatch(request, *args, **kwargs)

				def get(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

				def post(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

第三种写法(最简单 推荐)

			from django import views

			from django.utils.decorators import method_decorator

			@method_decorator(auth,name='dispatch')

			class Order(views.View):

				def get(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

				def post(self,reqeust):

					v = reqeust.COOKIES.get('username111')

					return render(reqeust,'index.html',{'current_user': v})

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