koa2+vue实现登陆及登录状态判断

const jwt = require('jsonwebtoken');
const serect = 'token'; //生成token所需要的密钥
let token = {
  addToken: (userInfo) => {
    const token = jwt.sign({ //这个函数需要三个参数, 第一个一般是登陆用户的名字, 第二个就是上面定义的密钥,第三个是过期时间 单位是s ,不过还可以写 {expiresIn:'2h'}(代表2小时)
      user: userInfo.user,
      id: userInfo.id
    }, serect, {expiresIn: 1});
    return token;
  },
  decrypt: (token) => {
    if (token) {
      let toke = tokens.split(' ')[1];
      // 解析
      let decoded = jwt.decode(toke, serect); //解析token需要两个参数,密钥 以及 前台传递的token
      return decoded;
    }
  }
}
exports = module.exports = token;

const addToken = require('../token/token')
router.post('/login',async (ctx)=> {
  let username = ctx.request.body.username;
  let password = ctx.request.body.password
  await userModel.selectUser([username]).then(async res => {
    if (res.length === 0) {
      ctx.body = {
        code: 102,
        message: '对不起账号不存在'
      }
    } else {
      if (await md5.MD5(password,res[0].solt) === res[0].password) {
        const token = addToken.addToken({user: res[0].name, id: res[0].id}) //主要是这里 生成token
        ctx.body = {
          code: 100,
          message: '登陆成功',
          token
        }
      } else {
        ctx.body = {
          code: 101,
          message: '对不起密码错误'
        }
      }
    }
  })
})

axios.post('/api/login', user).then(({status, data}) => {
          if (status === 200) {
            if (data.code === 102) {
              alert('对不起账号不存在')
            } else if (data.code === 101) {
              alert('对不起密码不正确')
            } else if (data.code === 100) {
              alert('登陆成功')
              console.log(data)
              this.$store.dispatch('tokenAddFun', data.token)
              this.$store.dispatch('userAddFun', user.username)
              this.$router.push('/')
            }
          }
        })

import axios from 'axios'
import store from '../store'
axios.interceptors.request.use(
  config => {
    config.headers.common['Authorization'] = 'Bearer '+ store.state.token;
    return config
  }
)
export default axios

import axios from '../../../axios/axios'
axios.get('/api/userlist').then(({status, data}) => {
          if (status === 200) {
            if (data.code !== 100) {
             alert('对不起,session过期,请重新登陆');
             this.$router.push('/login')
            } else {
              this.showData()
            }
          }
        })

const token = require('../token/addtoken')
router.get('/userlist', async (ctx, next) => {
 let webToken = ctx.request.header.authorization; //获取头部信息携带的token
 if (webToken){
  // 获取到token
  let res = token.decrypt(webToken); //解析token
  if (res && res.exp <= new Date()/1000){ //进行时间对比
   ctx.body = {
    message: 'token过期',
    code:102
   };
  } else {
   ctx.body = {
    message: '解析成功',
    code:100
   }
  }
 } else{ // 没有取到token
  ctx.body = {
   msg:'没有token',
   code: 101
  }
 }
})