vue的token刷新處理的方法

/*是否有請(qǐng)求正在刷新token*/
window.isRefreshing = false
/*被掛起的請(qǐng)求數(shù)組*/
let refreshSubscribers = []

/*獲取刷新token請(qǐng)求的token*/
function getRefreshToken () {
 return JSON.parse(localStorage.auth).refresh_token
}

/*push所有請(qǐng)求到數(shù)組中*/
function subscribeTokenRefresh (cb) {
 refreshSubscribers.push(cb)
}

/*刷新請(qǐng)求（refreshSubscribers數(shù)組中的請(qǐng)求得到新的token之后會(huì)自執(zhí)行，用新的token去請(qǐng)求數(shù)據(jù)）*/
function onRrefreshed (token) {
 refreshSubscribers.map(cb => cb(token))
}

/*請(qǐng)求攔截器*/
ajax.interceptors.request.use(
 config => {
  const authTmp = localStorage.auth
  /*判斷是否已登錄*/
  if (authTmp) {
   /*解析登錄信息*/
   let auth = JSON.parse(authTmp)
   /*判斷auth是否存在*/
   if (auth) {
    /*在請(qǐng)求頭中添加token類型、token*/
    config.headers.Authorization = auth.token_type + ' ' + auth.token
    /*判斷刷新token請(qǐng)求的refresh_token是否過(guò)期*/
    if (util.isRefreshTokenExpired()) {
     alert('刷新token過(guò)期，請(qǐng)重新登錄')
     /*清除本地保存的auth*/
     localStorage.removeItem('auth')
     window.location.href = '#/login'
     return
    }
    /*判斷token是否將要過(guò)期*/
    if (util.isTokenExpired() && config.url.indexOf('admin/auth/current') === -1) {
     /*判斷是否正在刷新*/
     if (!window.isRefreshing) {
      /*將刷新token的標(biāo)志置為true*/
      window.isRefreshing = true
      /*發(fā)起刷新token的請(qǐng)求*/
      apiList.refreshToken({refresh_token: getRefreshToken()}).then(res => {
       /*將標(biāo)志置為false*/
       window.isRefreshing = false
       /*成功刷新token*/
       config.headers.Authorization = res.data.data.token_type + ' ' + res.data.data.token
       /*更新auth*/
       localStorage.setItem('auth', JSON.stringify(res.data.data))
       /*執(zhí)行數(shù)組里的函數(shù),重新發(fā)起被掛起的請(qǐng)求*/
       onRrefreshed(res.data.data.token)
       /*執(zhí)行onRefreshed函數(shù)后清空數(shù)組中保存的請(qǐng)求*/
       refreshSubscribers = []
      }).catch(err => {
       alert(err.response.data.message)
       /*清除本地保存的auth*/
       // localStorage.removeItem('auth')
       window.location.href = '#/login'
      })
     }
     /*把請(qǐng)求(token)=>{....}都push到一個(gè)數(shù)組中*/
     let retry = new Promise((resolve, reject) => {
      /*(token) => {...}這個(gè)函數(shù)就是回調(diào)函數(shù)*/
      subscribeTokenRefresh((token) => {
       config.headers.Authorization = 'Bearer ' + token
       /*將請(qǐng)求掛起*/
       resolve(config)
      })
     })
     return retry
    }
   }
   return config

  } else {
   /*未登錄直接返回配置信息*/
   return config
  }
 },
 /*錯(cuò)誤操作*/
 err => {
  return Promise.reject(err)
 }
)

window.isRefreshing = false

 /*判斷刷新token請(qǐng)求的refresh_token是否過(guò)期*/
if (util.isRefreshTokenExpired() && config.url.indexOf('admin/auth/current') === -1) {
 alert('刷新token過(guò)期，請(qǐng)重新登錄')
 /*清除本地保存的auth*/
 localStorage.removeItem('auth')
 window.location.href = '#/login'
 return
}

/*把請(qǐng)求(token)=>{....}都push到一個(gè)數(shù)組中*/
let retry = new Promise((resolve, reject) => {
 /*(token) => {...}這個(gè)函數(shù)就是回調(diào)函數(shù)*/
 subscribeTokenRefresh((token) => {
  config.headers.Authorization = 'Bearer ' + token
  /*將請(qǐng)求掛起*/
  resolve(config)
 })
})
return retry

 /*執(zhí)行數(shù)組里的函數(shù),重新發(fā)起被掛起的請(qǐng)求*/
 onRrefreshed(res.data.data.token)

/*判斷token是否過(guò)期*/
function isTokenExpired() {
 /*從localStorage中取出token過(guò)期時(shí)間*/
 let expiredTime = new Date(JSON.parse(localStorage.auth).expired_at).getTime() / 1000
 /*獲取本地時(shí)間*/
 let nowTime = new Date().getTime() / 1000
 /*獲取校驗(yàn)時(shí)間差*/
 let diffTime = JSON.parse(sessionStorage.diffTime)
 /*校驗(yàn)本地時(shí)間*/
 nowTime -= diffTime
 /*如果 < 10分鐘，則說(shuō)明即將過(guò)期*/
 return (expiredTime - nowTime) < 10*60
}