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>
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(7); } //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(-3); } //判断cookie if ( (Request.Cookies["yk"]) != null) { if (Request.Cookies["yk"].Value == "123") { 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"]=="123") { Response.Write("登录成功!"); Response.Write(Request["category"]); } else { Response.Write("登录失败!"); Response.Write(Request["category"]); } } } } }
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), ]
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=="1": 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/")
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>{{ name }}</h1> </body> </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>
