vue axios基于常见业务场景的二次封装的实现

$ npm install axios

$ bower install axios

<script src="https://unpkg./axios/dist/axios.min.js"></script>

axios.defaults.timeout = 10000 //超时取消请求
axios.defaults.headers.post['Content-Type'] = 'application/json;charset=UTF-8'
axios.defaults.baseURL = process.env.BASE_URL 

// 创建实例时设置配置的默认值
var instance = axios.create({
 baseURL: 'https://api.another.'
});
// 在实例已创建后修改默认值
instance.defaults.headers.mon['Authorization'] = AUTH_TOKEN;

// 请求列表
const requestList = []
axios.interceptors.request.use((config) => {
 //1.将当前请求的URL添加进请求列表数组
 requestList.push(config.url)
 //2.请求开始，改变loading状态供加载动画使用
 store.dispatch('changeGlobalState', {loading: true})
 //3.从store中获取token并添加到请求头供后端作权限校验
 const token = store.getters.userInfo.token
 if (token) {
  config.headers.token = token
 }
 return config
}, function (error) {
 return Promise.reject(error)
})

axios.interceptors.response.use(function (response) {
 // 1.将当前请求中请求列表中删除
 requestList.splice(requestList.findIndex(item => item === response.config.url), 1)
 // 2.当请求列表为空时，更改loading状态
 if (requestList.length === 0) {
  store.dispatch('changeGlobalState', {loading: false})
 }
 // 3.统一处理权限认证错误管理
 if (response.data.code === 900401) {
  window.ELEMENT.Message.error('认证失效，请重新登录！', 1000)
  router.push('/login')
 }
 return response
}, function (error) {
 // 4.处理取消请求
 if (axios.isCancel(error)) {
  requestList.length = 0
  store.dispatch('changeGlobalState', {loading: false})
  throw new axios.Cancel('cancel request')
 } else {
  // 5.处理网络请求失败
  window.ELEMENT.Message.error('网络请求失败', 1000)
 }
 return Promise.reject(error)
})

const CancelToken = axios.CancelToken
//cancel token列表
let sources = []
const request = function (url, params, config, method) {
 return new Promise((resolve, reject) => {
  axios[method](url, params, Object.assign({}, config, {
  //1.通过将执行程序函数传递给CancelToken构造函数来创建cancel token
   cancelToken: new CancelToken(function executor (c) {
   //2.将cancel token存入列表
    sources.push(c)
   })
  })).then(response => {
   resolve(response.data)
  }, err => {
   if (err.Cancel) {
    console.log(err)
   } else {
    reject(err)
   }
  }).catch(err => {
   reject(err)
  })
 })
}

const post = (url, params, config = {}) => {
 return request(url, params, config, 'post')
}

const get = (url, params, config = {}) => {
 return request(url, params, config, 'get')
}
//3.导出cancel token列表供全局路由守卫使用
export {sources, post, get}

...
import { sources } from '../service/request'
...
router.beforeEach((to, from, next) => {
 document.title = to.meta.title || to.name
  //路由发生变化时取消当前页面网络请求
 sources.forEach(item => {
  item()
 })
 sources.length = 0
 next()
})

// 引入网络请求库 https://github./axios/axios

import axios from 'axios'
import store from '../store'
import router from '../router'

// axios.defaults.timeout = 10000
const requestList = []

axios.defaults.headers.post['Content-Type'] = 'application/json;charset=UTF-8'

axios.defaults.baseURL = process.env.BASE_URL
// 自定义拦截器
axios.interceptors.request.use((config) => {
 requestList.push(config.url)
 store.dispatch('changeGlobalState', {loading: true})
 const token = store.getters.userInfo.token
 if (token) {
  config.headers.token = token
 }
 return config
}, function (error) {
 return Promise.reject(error)
})

axios.interceptors.response.use(function (response) {
 requestList.splice(requestList.findIndex(item => item === response.config.url), 1)
 if (requestList.length === 0) {
  store.dispatch('changeGlobalState', {loading: false})
 }
 if (response.data.code === 900401) {
  window.$toast.error('认证失效，请重新登录！', 1000)
  router.push('/login')
 }
 return response
}, function (error) {
 requestList.length = 0
 store.dispatch('changeGlobalState', {loading: false})
 if (axios.isCancel(error)) {
  throw new axios.Cancel('cancel request')
 } else {
  window.$toast.error('网络请求失败！', 1000)
 }
 return Promise.reject(error)
})

const CancelToken = axios.CancelToken
let sources = []

const request = function (url, params, config, method) {
 return new Promise((resolve, reject) => {
  axios[method](url, params, Object.assign(config, {
   cancelToken: new CancelToken(function executor (c) {
    sources.push(c)
   })
  })).then(response => {
   resolve(response.data)
  }, err => {
   reject(err)
  }).catch(err => {
   reject(err)
  })
 })
}

const post = (url, params, config = {}) => {
 return request(url, params, config, 'post')
}

const get = (url, params, config = {}) => {
 return request(url, params, config, 'get')
}

export {sources, post, get}