angular8实现前端携带cookie发送给后端+nodejs获取前端发送的cookie

1.前端测试代码angular8

// 测试代码
  testCookie() {
    const url = 'http://10.11.11.11:3000/test/cookie'
    const params = {a:1}
    // {withCredentials: true} 这个是重点！！！！
    this.http.post( url,{}, params,  {withCredentials: true}).subscribe(_ => {
      console.log(_)
    })
  }
  // 测试代码

2.后端测试代码nodejs

app.js

const express=require('express');
// const bodyParser=require('body-parser');
const session = require('express-session')
var MySQLStore = require('express-mysql-session')(session);

var options = {
    host: '22.22.22.22',
    port: 3306,
    user: 'root',
    password: '123',
    database: 'aaa'
};

var sessionStore = new MySQLStore(options);

//引入路由模块
const cors=require('cors');
// const index=require("./routes/index");
const test = require('./routers/test')

//创建web服务器
var server=express();
//托管静态资源到public下；
server.use(express.static('public'));
//跨域请求cors
server.use(cors
  (
    {
  // origin:"*" ,
  // origin:"http://localhost:8080" ,
  origin:"http://10.11.33.33:4200" ,
  // origin:"http://127.0.0.1:5500" ,
  credentials: true
}
)
);
// server.writeHead(200,{"Access-Control-Allow-Credentials":true});
server.use(express.json())
server.use(express.urlencoded({
  extended:false
}));

//session 启用会话中间件，用来保存用户登录状态以及验证码
server.use(session({
  name: 'sessionId',
  resave: true,
  saveUninitialized: true,
  secret: 'APP_SESSION_SECRET',
  store: sessionStore // 将会话存到数据库
}))

server.use('/test',test);
server.use('/index',index);

server.use((req, res, next) => {
  res.status(404).send('404 not found')
})

// 异常处理器
server.use((req,res,next,err)=>{
  console.log('err.message')
  console.log(err.message)
  // res.send(500);
})

server.listen(3000);

./routers/test.js

const i18n = require('../i18n')
//创建路由器对象
const express = require('express')
//引入连接池模块
const pool = require('../pool.js')
const querystring = require('querystring')
const bodyParser = require('body-parser')
//创建路由器对象
var router = express.Router()
var code200 = { code: 200, msg: 'successful' }
var code401 = {
  code: 401,
  msg: 'this is required,so you cannot leave any of those blank ',
}
var code403 = { code: 403, msg: 'something has wrong' }
//post提交需要三项，引入body-parser 中间件 然后.body
router.use(
  bodyParser.urlencoded({
    extended: false,
  })
)

// 查询MC(Move Change)
router.post('/cookie', function (req, res) {
  var obj = req.body
  var cooki = req.headers.cookie
  console.log('打印COOKIE')
  console.log(cooki)
  let data = {
    data: [1,2,1],
    msg: 'SearchMC Success',
    status: 'Success',
  }

  setTimeout(() => {
    res.send(data)
  }, 100)
})
//导出路由器对象
module.exports = router

3.开始发送请求，你会发现

4.request headers里多了一个cookie字段，并且后端代码可以把前端发送的cookie打印出来了~~~~