node中的cookie的具体使用

npm i express --save
npm install cookie-parser --save

var express = require('express');
var cookieParser = require('cookie-parser');

var app = express();
app.use(cookieParser());

app.use(function (req, res) {
 if (req.url === '/favicon.ico') {
 return
 }

 // 设置常规cookie, 有效期为20s, 客户端脚本不能访问它的值
 res.cookie('name', 'abc', { signed: false, maxAge: 20 * 1000, httpOnly: true });
 console.log(req.cookies, req.url, req.signedCookies);

 res.end('hello cookie');
})

app.listen(4000)

var express = require('express');
var cookieParser = require('cookie-parser');

var app = express();

// 设置密钥，用来对cookie签名和解签, Express可以由此确定cookie的内容是否被篡改过
app.use(cookieParser('a cool secret'));

app.use(function (req, res) {
 if (req.url === '/favicon.ico') {
 return
 }

 // 设置签名cookie, 并且有效期为1min
 res.cookie('name', 'efg', { signed: true, maxAge: 60 * 1000, httpOnly: true });
 console.log(req.cookies, req.url, req.signedCookies);

 res.end('signed cookie');
})
app.listen(4000)

const express = require('express');
const cookieParser = require('cookie-parser');
const cookieSession = require('cookie-session');

var app = express();
app.use(cookieParser());

//cookieSession 必须放在cookieParser后面
app.use(cookieSession({
 //session的秘钥，防止session劫持。 这个秘钥会被循环使用，秘钥越长，数量越多，破解难度越高。
 keys: ['aaa', 'bbb', 'ccc'],
 //session过期时间，不易太长。php默认20分钟
 maxAge: 60*60,
 //可以改变浏览器cookie的名字
 name: 'session'
}));

app.use('/', function (req, res) {

 //假设使用count记录用户访问的次数
 if(req.session['count'] == null) {
  req.session['count'] = 1;
 }else{
  req.session['count']++;
 }
 console.log(req.session['count'])
 res.send('ok')
})
app.listen(8080)

//删除 delete req.session