request請求頭信息

type(request) //查看類 from django.core.handlers.wsgi import WSGIRequest結果會以字典的形式存在

request.environ封裝了用戶所有請求信息

模板繼承

主模板

{% block content %} {<% endblock %}

字模板
開頭導入

{% extends "master.html" %}{% block content %}內容{% endblock %}

導入其他標簽

{% include "master.html" %}

主模板可以渲染

simple_tag

在app下新建一個templatetags目錄,建一個py文件.

from django import template
from django.utils.safestring import mark_safe
register = template.Library()
@register.simple_tag

在主模板添加{% load py文件名%}稱 ,{% 函數名稱 %}}

例1:沒有參數

tianqi.py -------------- def number():return 123主模板 {% load tianqi %} {% number %}

例2:有參數

tianqi.py -------------- def number(a1,a2):return 123主模板 {% load tianqi %} {% number a1 a2 %}

可以加很多參數,不可以加到if語句里,例如{% if number a1 a2 %}是不允許的
例2:有參數

@register.filter def number1(a1,a2):return 123{{ "123"|number1:"456" }}

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

cookie

cookie是客戶端的一個小文件
應用場景:用戶登錄認證

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): # 獲取當前已經登錄的用戶v = reqeust.COOKIES.get('username111')return render(reqeust,'index.html',{'current_user': v})

res.set_cookie('username111',u)設置cookie
v = reqeust.COOKIES.get('username111')獲取cookie
關閉瀏覽器cookie失效

---

參數：key, 鍵value='', 值max_age=None, 超時時間expires=None, 超時時間(IE requires expires, so set it if hasn't been already.)path='/', Cookie生效的路徑，/ 表示根路徑，特殊的：跟路徑的cookie可以被任何url的頁面訪問domain=None, Cookie生效的域名secure=False, https傳輸httponly=False 只能http協議傳輸，無法被JavaScript獲取（不是絕對，底層抓包可以獲取到也可以被覆蓋）

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裝飾器

- 裝飾器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裝飾器

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})

第一種寫法

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})

第二種寫法

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})

第三種寫法(最簡單 推薦)

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})

轉載于:https://www.cnblogs.com/wspblog/p/6243484.html

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