解决vue项目axios每次请求session不一致的问题

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
require('es6-promise').polyfill()
import MintUI from 'mint-ui'
import 'mint-ui/lib/style.css'
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
import store from './store'
import axios from 'axios' // 1、在这里引入axios 
 
axios.interceptors.response.use(function(res) {
 var res = res.data;
 if(res.status === 403 ) {
 router.push('/')
 return res;
 }
 return res;
}, function(error) {
 return Promise.reject(error);
});
axios.defaults.withCredentials = true; //意思是携带cookie信息,保持session的一致性
Vue.prototype.$axios = axios
Vue.prototype.stringify = require('qs').stringify; 
 
Vue.use(MintUI)
Vue.use(ElementUI);
Vue.config.productionTip = false
 
/* eslint-disable no-new */
new Vue({
 el: '#app',
 router,
 store,
 components: { App },
 template: '<App/>'
})

const service = axios.create({
 baseURL: process.env.BASE_API, // api的base_url
 timeout: 5000, // request timeout
 withCredentials: true,
 crossDomain: true
})