Vue+Express实现登录注销功能的实例代码

<template>
  <div>
   <p><router-link :to="{name:'index'}">主页</router-link></p>
   <p><router-link :to="{name:'login'}">登录</router-link></p>
   <p><router-link :to="{name:'logout'}">注销</router-link></p>
   <p><router-link :to="{name:'me'}">个人信息</router-link></p>
   <p>登录状态:{{this.$store.state.me.login}}</p>
  </div>
 </template>

import Vue from 'vue'
import router from '../router';
export default{
  namespaced:true,
  state:{
    login :false
  },
  mutations:{
    changeLogin(state,{result}){ 
      state.login = result;
    }
  },
  actions:{
    async checkMe({commit}){
      const result = await Vue.prototype.$http.get('/me').then(data=>data.data);
      if(!result){
        router.push({name:'login'})
        return
      }
      commit('changeLogin',{result})
    }
  }
}

//serve/app.js文件 express服务器 
const express = require('express')
//中间件--用于下发session
const session = require('express-session')
const app = express()

//使用express-session下发session
app.set('trust proxy', 1)
app.use(session({
 secret: 'keyboard cat',
 resave: false,
 saveUninitialized: true,
}))

<template>
  <div>
    //请求后台数据
    <Button @click="getTest">敏感接口</Button>
    //请求信息展示
    {{result}}
    //页面跳转组件
   <route_list></route_list>
  </div>
</template>

<script>
import route_list from '../components/route_list'
  export default {
    components:{
      route_list
    },
    data(){
      return{
        result:""
      }
    },
    methods:{
    //请求敏感接口
     async getTest(){
       this.result = await this.$http.get("/").then(res=>res.data)
     }
    }
  }
</script>

app.get('/', function (req, res) {
 if(req.session.login){
  res.send("hello world")
 }else{
 res.send(403)
 }
})

import axios from 'axios';
import url from 'url';
import router from '../src/router'
//创建axios实例
var instance = axios.create({
  baseURL: '/api'
});

//拦截器
 instance.interceptors.response.use(
  function(response){
    return response;
  },function(error){
    //敏感接口.如果没有session跳转登录界面
    if(error.response.status==403){
      router.push({name:"login"})
    }
  }) 

export default instance;

//路由守卫
  router.beforeEach((to,from,next)=>{
 if(to.name != 'login' && to.name != 'index'){
  store.dispatch('me/checkMe')
 }
  next()
})

actions:{
    async checkMe({commit}){
      //请求/me接口,对登录信息进行判断,并保留状态
      const result = await Vue.prototype.$http.get('/me').then(data=>data.data);
      //返回值为false,跳转至login
      if(!result){
        router.push({name:'login'})
        return
      }
      commit('changeLogin',{result})
    }
  }

//验证是否登录
app.get('/me', function (req, res) { 
//判断session是否为true
 if(req.session.login){
  res.send(true)
 }else{
  res.send(false)
 }
})

<template>
  <div>
<h1>登录</h1>
<Button @click="login">登录</Button>
<route_list></route_list>
  </div>
</template>

<script>
import route_list from '../components/route_list'
  export default {
    components:{
      route_list
    },
   methods:{
     async login(){
     //请求登录接口
      const result = await this.$http.get("/login").then(data=>data.data);
      //记录登录状态
      this.$store.commit('me/changeLogin',{result})
     }
    },
}
</script>

//登录接口,更改session状态
app.get('/login', function (req, res) { 
 req.session.login = true,
 res.send(true)
})

<template>
  <div>
    <h1>注销</h1>
<Button @click="login">注销</Button>
<route_list></route_list>
  </div>
</template>
<script>
import route_list from '../components/route_list'
  export default {
    components:{
      route_list
    },
  data(){
    return{
      
    }
  },
   methods:{
     async login(){
      const result = await this.$http.get("/logout").then(data=>data.data);
      this.$store.commit('me/changeLogin',{result})
     }
    },
    
}
</script>

//登录接口,更改session状态
app.get('/login', function (req, res) { 
 req.session.login = false,
 res.send(false)
})