axios 封装上传文件的请求方法

import Vue from 'vue';

import VueCookie from 'vue-cookie';
import axios from 'axios';
// import toastr from '../assets/toastr.min';
// Vue.use(axios)


let http = {};
// let _baseURL = '/vpaas'
let _baseURL = 'http://localhost:8080/vpaas'
let ContentType = "application/json";

let uploadFileType = "multipart/form-data";
http.baseURL = _baseURL;


/**
 * 上传文件的请求
 * @param url
 * @returns {AxiosPromise}
 */
http.uploadFile = function (url, data) {
 let config = {
 //请求的接口，在请求的时候，如axios.get(url,config);这里的url会覆盖掉config中的url
 url: url,
 //基础url前缀
 baseURL: _baseURL,
 transformResponse: [function (data1) {
  var data = data1;
  if (typeof data1 == "string") {
  data = JSON.parse(data1);
  }
  //这里提前处理返回的数据;
  if (data.message && (data.data === 'login.invalid.token')) {
  window.localStorage.removeItem("access-user");
  alert("超时请重新登陆");
  window.location.href = '/';
  }
  return data;
 }],
 //请求头信息
 headers: {'access-user': window.localStorage.getItem('access-user'), 'Content-Type': uploadFileType},

 //跨域请求时是否需要使用凭证
 withCredentials: true,
 // 返回数据类型
 responseType: 'json', //default
 };
 return axios.post(url, data, config);
};