vueを使った権限管理機能の実装方法

this.$store.dispatch('LoginByEmail', this.loginForm).then(() => {
 this.$router.push({ path: '/' }); //登录成功之后重定向到首页
}).catch(err => {
 this.$message.error(err); //登录失败提示错误
});

LoginByEmail ({ commit }, userInfo) {
   const email = userInfo.email.trim()
   return new Promise((resolve, reject) => {
    loginByEmail(email, userInfo.password).then(response => {
     const data = response.data
     setToken(response.data.token)
     commit('SET_TOKEN', data.token)
     resolve()
    }).catch(error => {
     reject(error)
    })
   })
  }

router.beforeEach((to, from, next) => {
 if (getToken()) { // 判断是否取到token
  if (to.path === '/login') {
   next({ path: '/' })
  } else {
   if (store.getters.roles.length === 0) { // 判断当前用户是否已获取完user_info信息
    store.dispatch('GetInfo').then(res => { // 获取user_info
     const roles = res.data.role
     store.dispatch('GenerateRoutes', { roles }).then(() => { // 生成可访问的路由表
      router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表
      next({ ...to }) // 放行路由
     })
    }).catch(() => {
     store.dispatch('FedLogOut').then(() => {
      next({ path: '/login' })
     })
    })
   } else {
    next() // 放行该路由
   }
  }
 } else {
  if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单里的路径，继续让其访问
   next()
  } else { // 其他不在白名单里的路径全部让其重定向到登录页面！
   next('/login')
   alert('not in white list, now go to the login page')
  }
 }
})

export function getToken () {
 return Cookies.get(TokenKey)
}

  GetInfo ({ commit, state }) {
   return new Promise((resolve, reject) => {
    getInfo(state.token).then(response => {
     const data = response.data
     console.log(data)
     commit('SET_ROLES', data.role)
     commit('SET_NAME', data.name)
     resolve(response)
    }).catch(error => {
     reject(error)
    })
   })
  }

  GenerateRoutes ({ commit }, data) {
   return new Promise(resolve => {
    const { roles } = data
    let accessedRouters
    if (roles.indexOf('admin') >= 0) {
     accessedRouters = asyncRouter
    } else {
     accessedRouters = filterAsyncRouter(asyncRouter, roles)
    }
    commit('SET_ROUTERS', accessedRouters)
    resolve()
   })
  }