axios对请求各种异常情况处理的封装方法

import axios from 'axios'
import { Toast } from 'mint-ui'
//请求时的拦截
axios.interceptors.request.use(config => {
 return config;
}, err => {
 Toast('请求超时!' );
 return Promise.resolve(err);
})
//响应时的拦截
axios.interceptors.response.use(data => {
 // 返回响应时做一些处理
 // 第一种方式
 const data = response.data

 // 根据返回的code值来做不同的处理（和后端约定）
 switch (data.code) {
  case '0':
   // 举例
   // exp: 修复iPhone 6+ 微信点击返回出现页面空白的问题
   if (isIOS()) {
    // 异步以保证数据已渲染到页面上
    setTimeout(() => {
     // 通过滚动强制浏览器进行页面重绘
     document.body.scrollTop += 1
    }, 0)
   }
   // 这一步保证数据返回，如果没有return则会走接下来的代码，不是未登录就是报错
   return data

  // 需要重新登录
  case 'SHIRO_E5001':
   // 微信生产环境下授权登录
   if (isWeChat() && IS_PRODUCTION) {
    axios.get(apis.common.wechat.authorizeUrl).then(({ result }) => {
     location.replace(global.decodeURIComponent(result))
    })
   } else {
    // 否则跳转到h6登录并带上跳转路由
    const search = encodeSearchParams({
     next: location.href,
    })

    location.replace(`/user/login?${search}`)
   }

   // 不显示提示消息
   data.description = ''
   break

  default:
 }
 // 若不是正确的返回code，且已经登录，就抛出错误
 const err = new Error(data.description)

 err.data = data
 err.response = response

 // 第二种方式，我采取的
 if (data.status && data.status == 200 && data.data.status == 'error') {
  Toast(data.data.msg);
  return data;
 }
 return data;
},err => {
 // 当响应异常时做一些处理
 if (err && err.response) {
  switch (err.response.status) {
   case 400: err.message = '请求错误(400)'; break;
   case 401: err.message = '未授权，请重新登录(401)'; break;
   case 403: err.message = '拒绝访问(403)'; break;
   case 404: err.message = '请求出错(404)'; break;
   case 408: err.message = '请求超时(408)'; break;
   case 500: err.message = '服务器错误(500)'; break;
   case 501: err.message = '服务未实现(501)'; break;
   case 502: err.message = '网络错误(502)'; break;
   case 503: err.message = '服务不可用(503)'; break;
   case 504: err.message = '网络超时(504)'; break;
   case 505: err.message = 'HTTP版本不受支持(505)'; break;
   default: err.message = `连接出错(${err.response.status})!`;
  }
 } else {
  err.message = '连接服务器失败!'
 }
 Toast(err.message);
 return Promise.resolve(err);
})

//如果需要可以封装一些请求的方法
let base = '';

export const postRequest = (url, params) => {
 return axios({
  method: 'post',
  url: `${base}${url}`,
  data: params,
  transformRequest: [function (data) {
   let ret = ''
   for (let it in data) {
    ret += encodeURIComponent(it) + '=' + encodeURIComponent(data[it]) + '&'
   }
   return ret
  }],
  headers: {
   'Content-Type': 'application/x-www-form-urlencoded'
  }
 });
}
export const uploadFileRequest = (url, params) => {
 return axios({
  method: 'post',
  url: `${base}${url}`,
  data: params,
  headers: {
   'Content-Type': 'multipart/form-data'
  }
 });
}
export const putRequest = (url, params) => {
 return axios({
  method: 'put',
  url: `${base}${url}`,
  data: params,
  transformRequest: [function (data) {
   let ret = ''
   for (let it in data) {
    ret += encodeURIComponent(it) + '=' + encodeURIComponent(data[it]) + '&'
   }
   return ret
  }],
  headers: {
   'Content-Type': 'application/x-www-form-urlencoded'
  }
 });
}
export const deleteRequest = (url) => {
 return axios({
  method: 'delete',
  url: `${base}${url}`
 });
}
export const get = (url,params) => {
 return axios({
  method: 'get',
  url: `${base}${url}?`,
  params: params,
  headers:{
   'Content-Type': 'application/x-www-form-urlencoded',
   'Access-Token': localStorage.getItem("AccessToken")
  }
 });
}

var _this = this;
this.loading = true;
this.postRequest('/login', {
 username: this.loginForm.username,
 password: this.loginForm.password
}).then(resp=> {
 _this.loading = false;
 if (resp && resp.status == 200) {
 _this.getRequest("/config/hr").then(resp=> {
  if (resp && resp.status == 200) {
  var data = resp.data;
  _this.$store.commit('login', data);
  var path = _this.$route.query.redirect;
  _this.$router.replace({path: path == '/' || path == undefined ? '/home' : path});
  }
 })
 }

import {get} from './utils/api'
import {postRequest} from './utils/api'
import {deleteRequest} from './utils/api'
import {putRequest} from './utils/api'

Vue.prototype.getRequest = getRequest;
Vue.prototype.postRequest = postRequest;
Vue.prototype.deleteRequest = deleteRequest;
Vue.prototype.putRequest = putRequest;

this.postRequest('/login', {
 username: this.loginForm.username,
 password: this.loginForm.password
}).then(resp=> {
 ...
 }
});

_this.get(
   this.url_s+"/Notice/findTotalCount",{
    userId:localStorage.getItem("userid"),
    openId: localStorage.getItem('openId')
   }
  )
  .then(function(res) {
   //
  })