Django #cookie

Posted 2020-10-08 Trouble Maker

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views.py

from django.shortcuts import render,HttpResponse,redirect

# Create your views here.
user_info = {
    \'admin\':{\'pwd\':\'111111\'},
    \'user2\':{\'pwd\':\'123123\'}
}
def login(request):
    if request.method ==\'GET\':
        return render(request,\'login.html\')  #请求login.index的页面渲染。usl还是http://127.0.0.1:8000/login/
    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\') #请求login.index的页面渲染。usl还是http://127.0.0.1:8000/login/login.html
        if dic[\'pwd\']==p:
            res = redirect(\'/index/\')        #重定向,请求的Url变成http://127.0.0.1:8000/index/
            res.set_cookie(\'username\',u)
            return res
        else:
            return render(request,\'login.html\')

def index(request):
    v = request.COOKIES.get(\'username\')
    if not v:
        return redirect(\'/login/\')           #重定向,请求的Url变成http://127.0.0.1:8000/login/
    else:
        return render(request,\'index.html\',{\'current_user\':v})

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="login.html" method="POST">
        <input type="text" name=\'username\' placeholder="用户名">
        <input type="text" name=\'pwd\' placeholder="密码">
        <input type="submit" value="登录">
        <input type="button" value="提交">

    </form>

</body>
</html>

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <p>Welcome {{ current_user }}</p>
</body>
</html>

urls.py

"""lwslws URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r\'^$\', views.home, name=\'home\')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r\'^$\', Home.as_view(), name=\'home\')
Including another URLconf
    1. Import the include() function: from django.conf.urls import url, include
    2. Add a URL to urlpatterns:  url(r\'^blog/\', include(\'blog.urls\'))
"""
from django.conf.urls import url
from django.contrib import admin
from apps01 import views

urlpatterns = [
    url(r\'^admin/\', admin.site.urls),
    url(r\'^login/\', views.login),
    url(r\'^index/\', views.index),
]

浏览器展示：

Session：

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\')
        if u ==\'root\' and p ==\'123\':
　　　　　　　#session是依赖于cookie
            #生成随机字符串
            #写到用户浏览器的cookie中
　　　　　　  #保存到session中
   　　　　　 #在随机字符串对应的字典中设置相关内容
             #request.session做了以上的事情
            request.session[\'username\']=u
            request.session[\'is_login\']=True
            return redirect(\'/index/\')
        else:
            return render(request,\'login.html\')


def index(request):
    if request.session[\'is_login\']:
        return render(request,\'index.html\')
    else:
        return HttpResponse(\'Gun!\')

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