Cookie

1、获取Cookie

客户端浏览器上的一个文件

request.COOKIES['key']
request.get_signed_cookie(key, default=RAISE_ERROR, salt='', max_age=None)
    参数：
        default: 默认值
           salt: 加密盐
        max_age: 后台控制过期时间

2、设置Cookie

rep = HttpResponse(...) 或 rep ＝ render(request, ...)
 
rep.set_cookie(key,value,...)
rep.set_signed_cookie(key,value,salt='加密盐',...)
    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）

由于cookie保存在客户端的电脑上，所以，JavaScript和jquery也可以操作cookie。
下载：http://plugins.jquery.com/cookie/

<script src='/static/js/jquery.cookie.js'></script>
$.cookie("list_pager_num", 30,{ 
			path: '/' ,
			expires:7,
			domain:None,
});

3、示例

# request.COOKIES
# request.COOKIES['username111']
request.COOKIES.get('username111')

response = render(request,'index.html')
#response = redirect('/index/')

# 设置cookie，关闭浏览器失效
response.set_cookie('key',"value")

# 设置cookie, N秒只有失效
response.set_cookie('username111',"value",max_age=10)

# 设置cookie, 截止时间失效
import datetime
current_date = datetime.datetime.utcnow() 
current_date = current_date + datetime.timedelta(seconds=5)
response.set_cookie('username111',"value",expires=current_date)
response.set_cookie('username111',"value",max_age=10)

# request.COOKIES.get('...')
# response.set_cookie(...)
obj = HttpResponse('s')

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