使用 axios 自定义 request

前后端分离的数据交互需要注意高效的交互方式，常用轮子有 axios。

主要模式是用使用顶层的 store 中的 state 存储 token，在每次请求中使用 token 发起请求，然后判断响应的状态返回状态信息。

request.js :

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

// create an axios instance
const service = axios.create({
  baseURL: process.env.BASE_API, // api 的 base_url
  timeout: 40000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // Do something before request is sent
    if (store.getters.token) {
      // 让每个请求携带token-- ['X-Token']为自定义key 请根据实际情况自行修改
      config.headers['admin-token'] = getToken()
    }
    return config
  },
  error => {
    // Do something with request error
    console.log(error) // for debug
    Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(

  /** response => response,
   * 下面的注释为通过在response里，自定义code来标示请求状态
   * 当code返回如下情况则说明权限有问题，登出并返回到登录页
   * 如想通过 xmlhttprequest 来状态码标识 逻辑可写在下面error中
   * 以下代码均为样例，请结合自生需求加以修改，若不需要，则可删除
   */
  response => {
    const res = response.data
    const typew = res.type
    if (typew === 'application/vnd.ms-excel') {
      return res
    }
    // 50008:非法的token; 50012:其他客户端登录了;  50014:Token 过期了;
    if (res.code === 'login' || res.code === 'role_not_exit') {
      // 请自行在引入 MessageBox
      //
      MessageBox.confirm('你已被登出，请重新登录', '确定登出', {
        confirmButtonText: '重新登录',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        store.dispatch('FedLogOut').then(() => {
          location.reload() // 为了重新实例化vue-router对象 避免bug
        })
      })
      // }
      return Promise.reject(res)
    } else if (res.code === 'no_permit') {
      Message({
        message: res.msg,
        type: 'error',
        duration: 3 * 1000
      })
      return Promise.reject(res)
    } else {
      return res
    }
  },
  error => {
    let response = {
      msg: '系统发生异常，请重试或联系管理员',
      status: 'system error',
      code: 50000,
      detail: error,
      ok: false
    }
    if (error.response) {
      if (error.response.status === 504) {
        response = {
          ...response,
          msg: `${error.response.status}：网关炸了！`
        }
      } else if (error.response.status === 404) {
        response = {
          ...response,
          msg: `${error.response.status}：请求未知路径！`
        }
      } else if (error.response.status === 403) {
        response = {
          ...response,
          msg: `${error.response.status}：权限不足,请联系管理员!`
        }
      } else if (error.response.status === 500) {
        response = {
          ...response,
          msg: `${error.response.status}：服务器发生异常，请重试或联系管理员！`
        }
      } else {
        response = {
          ...response,
          msg: `${error.response.status}：发生未知错误，请重试或联系管理员!`
        }
      }
    } else {
      response = {
        ...response,
        msg: '请求无响应，请检查本地或联系管理员检查服务端网络连接状态'
      }
      Message({
        type: 'error',
        message: response.msg
      })
    }
    return response
  }
)

export default service

store/index.js :

import Vue from 'vue'
import Vuex from 'vuex'
import app from './modules/app'
import errorLog from './modules/errorLog'
import permission from './modules/permission'
import tagsView from './modules/tagsView'
import user from './modules/user'
import getters from './getters'

Vue.use(Vuex)

const store = new Vuex.Store({
  modules: {
    app,
    errorLog,
    permission,
    tagsView,
    user
  },
  getters
})

export default store

getters.js :

const getters = {
  sidebar: state => state.app.sidebar,
  language: state => state.app.language,
  size: state => state.app.size,
  device: state => state.app.device,
  visitedViews: state => state.tagsView.visitedViews,
  cachedViews: state => state.tagsView.cachedViews,
  token: state => state.user.token,
  avatar: state => state.user.avatar,
  name: state => state.user.name,
  introduction: state => state.user.introduction,
  status: state => state.user.status,
  roles: state => state.user.roles,
  roleName: state => state.user.roleName,
  setting: state => state.user.setting,
  permission_routes: state => state.permission.routes,
  addRoutes: state => state.permission.addRoutes,
  errorLogs: state => state.errorLog.logs
}
export default getters

utils/auth.js :

import Cookies from 'js-cookie'

const TokenKey = 'Admin-Token'

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

export function setToken(token) {
  return Cookies.set(TokenKey, token)
}

export function removeToken() {
  return Cookies.remove(TokenKey)
}