vue实现token过期自动跳转到登录页面

{
 code:10009,
 msg:'token过期',
 data:null
}

router.beforeEach(async(to, from, next) => {
//获取token
  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
  //token存在，如果当前跳转的路由是登录界面
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
    //在这里，就拉去用户权限，判断用户是否有权限访问这个路由
    } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
  } else {
    //token不存在
    if (whiteList.indexOf(to.path) !== -1) {
    //如果要跳转的路由在白名单里，则跳转过去
      next()
    } else {
    //否则跳转到登录页面
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, 
  timeout: 5000 
})
//发送请求时把token携带过去
service.interceptors.request.use(
  config => {
    if (store.getters.token) {
      config.headers['sg-token'] = getToken()
    }
    return config
  },
  error => {
    console.log(error)
    return Promise.reject(error)
  }
)

service.interceptors.response.use(
  response => {
    console.log(response.data)
    const res = response.data

    // token过期，重返登录界面
    if (res.code === 10009) {
      store.dispatch('user/logout').then(() => {
        location.reload(true)
      })
    }
    return res
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.msg,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

export default service