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 reselse: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 viewsfrom django.utils.decorators import method_decoratorclass 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 viewsfrom django.utils.decorators import method_decoratorclass 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 viewsfrom 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})