Python自动化之模板继承和cookie
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
- 在app下新建一个templatetags目录,建一个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%}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
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})
感谢关注
