vue项目中存储与使用后端传递过来的token

const expressJWT = require('express-jwt')
const app = express();
const config = require('./config')
app.use(expressJWT({secret: config.jwtSecretKey}).unless({path: [/^\/api\/users/]}))

const testRouter = require('./routes/testToken')
app.use('/my', testRouter)

const express = require('express');
const router = express.Router();

const test = require('../router_handler/testToken')

router.get('/current', test.test)

module.exports = router

const db = require('../db/index');

exports.test = (req, res) => {
    const sql = 'select * from users where id = ?'
    db.query(sql, req.user.id, (err, results) => {
        if(err) return res.send({status: 404, message: err})
        if(results.length !== 1) return res.send({status: 404, messsage: '获取用户信息失败，需重新登录'})
        res.json(results[0])
    })
    // res.send(req)
}

// 用户登录的处理函数
exports.login = (req, res) => {
    const userinfo = req.body
    const sql = 'select * from users where name = ?'
    db.query(sql, userinfo.name, (err, results) => {
        if(err) return res.send({status: 404, message: err.message})
        if(results.length !== 1) return res.status(404).json('用户不存在！')
        const compareResults = bcrypt.compareSync(userinfo.password, results[0].password)
        if(!compareResults) return res.status(404).json('密码错误！')
        const user = {
            id: results[0].id,
            name: results[0].name,
            avatar: results[0].avatar,
            identify: results[0].identify
        }
        const tokenStr = jwt.sign(user, config.jwtSecretKey, {expiresIn: '10h'})
        res.json({
            status:200, 
            message: '登录成功', 
            // result: results[0], 
            token: 'Bearer ' + tokenStr
        })
    })
}

methods: {
    submitForm(formName) {
      this.$refs[formName].validate(valid => {
        if (valid) {
          this.$axios
            .post("/users/login", this.loginUser)
            .then(res => {
                // console.log(res)
                //token
                const { token } = res.data
                localStorage.setItem("eleToken", token)
             
                this.$router.push("/index");
            });
        } else {
          console.log("error submit!!");
          return false;
        }
      });
    }
  }

import Vue from 'vue'
import VueRouter from 'vue-router'
import Index from './views/Index.vue'
import Register from './views/Register.vue'
import NotFound from './views/404.vue'
import Login from './views/Login.vue'

Vue.use(VueRouter)

const router = new VueRouter({
    mode: 'history',
    base: process.env.BASE_URL,
    routes: [
        { path: '*', name: '/404', component: NotFound },
        { path: '/', redirect: '/index' },
        { path: '/register', name: 'register', component: Register },
        { path: '/index', name: 'index', component: Index },
        { path: '/login', name: 'login', component: Login },
    ]
})

// 路由守卫
router.beforeEach((to, from, next) => {
    const isLogin = localStorage.eleToken ? true: false
    if(to.path == '/login' || to.path == '/register'){
        next()
    }else {
        isLogin ? next() : next('/login')
    }
})

export default router

import axios from "axios";
import { Message, Loading } from 'element-ui';
import router from "./router"

let loading;
function startLoading(){
    loading = Loading.service({
        lock: true,
        text: '数据加载中',
        background: 'rgba(0,0,0,0.7)'
    })
}

function endLoading(){
    loading.close();
}

// 请求拦截
axios.interceptors.request.use(config => {
    startLoading();
    if(localStorage.eleToken){
        // 设置统一的请求头
        config.headers.Authorization = localStorage.eleToken
    }
    return config
}, error => {
    return Promise.reject(error)
})

//响应拦截
axios.interceptors.response.use(response => {
    endLoading();
    return response
}, error => {
    // 错误提醒
    endLoading();
    Message.error(error.response.data)

    // 获取错误状态码
    const {status} = error.response
    if(status == 401){
        Message.error("token失效，请重新登录")
        localStorage.removeItem('eleToken')
        router.push('/login')
    }
    return Promise.reject(error)
})

export default axios

//响应拦截
axios.interceptors.response.use(response => {
    endLoading();
    return response
}, error => {
    // 错误提醒
    endLoading();
    Message.error(error.response.data)
    console.log(error.response)

    // 获取错误状态码
    const {status} = error.response
    console.log(status)
    if(status === 0){
        Message.error("token失效,请重新登录")
        localStorage.removeItem('eleToken')
        // console.log(error)
        router.push('/login')
    }
    return Promise.reject(error)
})