cookie作用

根据当前浏览器的cookie值，判断用户是否已经有效登陆到系统，获取访问权。
当用户跳过登陆页面，直接访问home，直接返回到login.html页面

HTML代码login.html

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body> <h2>登陆页面</h2> <form action="/ormtest/login/" method="post"> <p> 用户名：<input type="text" name="user"> </p> <p> 密码：<input type="password" name="pwd"> </p> <p> <input type="submit" value="提交"> </p> </form></body></html>home.html

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>我是首页啊</title></head><body> <h2>我是首页啊</h2></body></html>Python 代码

def login(request): if request.method == "GET": return render(request,"login.html") else: user = request.POST.get("user") pwd = request.POST.get("pwd") if user == "kang" and pwd == "123456": rep = redirect("/ormtest/home/") #设置一个加密的cookie,默认值为"1"，加密条件"MingKangZhou" rep.set_signed_cookie("is_login","1",salt="MingKangZhou") return rep else: return render(request, "login.html")def home(request): #获取当前浏览器"is_login"的cookie值 ret = request.get_signed_cookie("is_login",default="0",salt="MingKangZhou") if ret == "1": #如果为1，代表已经登陆成功 return render(request,"home.html") else: #如果不为"1"，即返回到登陆页面 return redirect("/ormtest/login/")