express---express-session axios

express---express-session axios

使用axios访问后台获取session中的属性值为undefined

1. 在main.js中导入axios

   import axios from 'axios'
   axios.defaults.withCredentials = true//关键
   Vue.prototype.$http = axios

2. server.js中编写接口

   var express=require('express');
   var session = require("express-session");
   var cookieParser = require("cookie-parser");
   var app =express();
   var router = express.Router();
   app.use(cookieParser('sessiontest'));
   app.use(session({
    secret: 'sessiontest',//与cookieParser中的一致
    resave: true,
    saveUninitialized:true
   }));
   //设置跨域访问，关键
   app.all('*', function(req, res, next) {
      res.header("Access-Control-Allow-Origin", "*");
      res.header("Access-Control-Allow-Headers", "X-Requested-With,Content-Type");
      res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
      //res.header("X-Powered-By",' 3.2.1');
      //res.header("Content-Type", "application/json;charset=utf-8");
      next();
   });
   app.use(router)
   router.get('/getUserByNameAndPass',function(req,res){//get请求
       var sql = "select * from userInfo where account = ?";
       connection.query(sql,req.query.account, function (error, data) {
           if (error) {
               var result = {
                   "status": "500",
                   "message": "服务器错误"
               }
               return res.jsonp(result);
           }else{
             if (data.length == 0) {
               res.jsonp({ "status": "200","message": "账号不存在",});
             }else if(data[0].password != req.query.password){
               res.jsonp({ "status": "200","message": "密码错误",});
             }else{
                req.session.userInfo = data[0]
               res.send({ "status": "200","message": "success",'user':data[0]});
             }
           }
       })
   })
   router.post('/loginUserInfo',function(req,res){
     if(req.session.userInfo){
       res.jsonp({ "status": "200","message":       "success",'userInfo':req.session.userInfo});
     }else{
       res.jsonp({ "status": "200","message": "error",'message':"用户未登录"});
     }
   })

3. axios访问接口

   getUserByNameAndPass () {
         this.$http({
           method: 'get',
           url: 'http://localhost:8283/getUserByNameAndPass',
           params: {
             'password': '12138',
             'account': 'fc6963',
           }
         }).then(function (res) {
           console.log(res)
         })
   },
   loginUserInfo () {
         this.$http({
           method: 'post',
           url: 'http://localhost:8283/loginUserInfo',
         }).then(function (res) {
           console.log(res)
         })
   },
   //loginUserInfo方法收到从server响应session中的数据
   {id: 1, name: "付xx", account: "fc6963", age: 29, identify: "管理员", password: "12138", phoneNumber: null,…}

express---express-session axios

原文：https://www.cnblogs.com/luo-bo/p/10666362.html