步步为营-75-Cookie简介

说明:cookie常用于数据保存

1 使用

　　//创建cookie

　　Response.cookies["yk"].value ="xyxtl";

　　//设置过期时间如果不设置cookie只存在内存中,无法实现长期保存

　　Response.cookies["yk"].Expires = DateTime.Now.AddDays(3);

　　//删除cookie == 修改过期时间

　　Response.cookies["yk"].Expires = DateTime.Now.AddDays(-3);

　　//cookie跨域正常的情况主域可以自动向子域传递数据,子域无法向主域传递数据

　　Response.cookies["yk"].Domain = "主域网址";

　　//cookie使用范围

　 Response.cookies["yk"].Path = ...

二：C#中的使用实例:记住密码

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="01Cookie记住密码.aspx.cs" Inherits="_03状态保持_Cookies和Session_._01Cookie记住密码" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title></title>

</head>

<body>

    <form id="form1" method="post" >

    用户名:<input type="text" name="UserName"/>

        <br />

    密码:<input type="password" name="Pwd"/>

        <br />

     <input type="checkbox" id="Remember" name="Remember"  />记住我1周

     <input type="checkbox" id="Forget" name="Forget" />退出

        <br />

     <input type="submit" value="登录" />

    </form>

</body>

</html>

aspx

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace _03状态保持_Cookies和Session_

{

    public partial class _01Cookie记住密码 : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            //写入cookie

            if (   Request["Remember"]=="on")

            {

                string userName = Request["UserName"];

                string pwd = Request["Pwd"];

                Response.Cookies[userName].Value = pwd;

                Response.Cookies[userName].Expires = DateTime.Now.AddDays();

            }

            //删除cookie

            if ( Request["Forget"] == "on")

            {

                string userName = Request["UserName"];

                string pwd = Request["Pwd"];

                Response.Cookies[userName].Value = pwd;

                Response.Cookies[userName].Expires = DateTime.Now.AddDays(-);

            }

            //判断cookie

            if ( (Request.Cookies["yk"]) != null)

            {

                if (Request.Cookies["yk"].Value == "")

                {

                    Response.Write("登录成功!");

                     Response.Write(Request["category"]);

                }

                else {

                    Response.Write("登录失败!");

                    Response.Write(Request["category"]);

                }

            }

            else

            {

                if (!String.IsNullOrEmpty(Request["UserName"]) && !String.IsNullOrEmpty(Request["Pwd"]) && Request["UserName"] == "yk" && Request["Pwd"]=="")

                {

                    Response.Write("登录成功!");

                    Response.Write(Request["category"]);

                }

                else {

                    Response.Write("登录失败!");

                      Response.Write(Request["category"]);

                }

            }

        }

    }

}

aspx.cs

在不使用cookie记录前登录是失败的

三：python 中使用cookie直接访问index页面

1：注释掉setting.py的中间件配置

2：配置路由

"""cookie_Session URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:

    https://docs.djangoproject.com/en/2.1/topics/http/urls/

Examples:

Function views

    1. Add an import:  from my_app import views

    2. Add a URL to urlpatterns:  path('', views.home, name='home')

Class-based views

    1. Add an import:  from other_app.views import Home

    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')

Including another URLconf

    1. Import the include() function: from django.urls import include, path

    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))

"""

from django.contrib import admin

from django.urls import path

from app011 import views

urlpatterns = [

    path('admin/', admin.site.urls),

    path('login/', views.login),

    path('index/', views.index),

]

urls.py

from django.shortcuts import render,redirect

# Create your views here.

def login(request):

    # print("SSSSSSSSS",request.session)

    if request.method=="POST":

        name=request.POST.get("user")

        pwd = request.POST.get("pwd")

        if  name=="aaron" and pwd=="":

            ret = redirect("/index/")

            ret.set_cookie("user",name)

            ret.set_cookie("password",pwd)

            return ret

    return render(request,"login.html")

def index(request):

    if  request.COOKIES.get("user",None) == "aaron":

        name = "aaron"

        return render(request, "index.html",locals())

    else:

        return redirect("/login/")

Views.py

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

    <h1>{{ name }}</h1>

</body>

</html>

index.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>登录</title>

    <style>

        *{

            margin: 0;

            padding:0;

        }

    </style>

</head>

<body>

<form action="/login/" method="post">

    <p>姓名<input type="text" name="user"></p>

    <p>密码<input type="password" name="pwd"></p>

    <p><input type="submit"></p>

</form>

</body>

</html>

巴特西

步步为营-75-Cookie简介

最新文章

热门文章