import axios from 'axios';//引入axios依賴import { Message } from 'element-ui';import Cookies from 'js-cookie'; //引入cookie操作依賴import router from '@/router/index'//引入路由對象axios.defaults.timeout = 5000;axios.defaults.baseURL ='';//http request 封裝請求頭攔截器axios.interceptors.request.use(  config => {    var token = ''    if(typeof Cookies.get('user') === 'undefined'){      //此時為空    }else {      token = JSON.parse(Cookies.get('user')).token    }//注意使用的時候需要引入cookie方法，推薦js-cookie    config.data = JSON.stringify(config.data);    config.headers = {      'Content-Type':'application/json'    }    if(token != ''){     config.headers.token = token;    }    return config;  },  error => {    return Promise.reject(err);  });//http response 封裝后臺返回攔截器axios.interceptors.response.use(  response => {    //當返回信息為未登錄或者登錄失效的時候重定向為登錄頁面    if(response.data.code == 'W_100004' || response.data.message == '用戶未登錄或登錄超時，請登錄！'){      router.push({        path:"/",        querry:{redirect:router.currentRoute.fullPath}//從哪個頁面跳轉      })    }    return response;  },  error => {    return Promise.reject(error)  })/** * 封裝get方法 * @param url * @param data * @returns {Promise} */export function fetch(url,params={}){  return new Promise((resolve,reject) => {    axios.get(url,{      params:params    })      .then(response => {        resolve(response.data);      })      .catch(err => {        reject(err)      })  })}/** * 封裝post請求 * @param url * @param data * @returns {Promise} */export function post(url,data = {}){  return new Promise((resolve,reject) => {    axios.post(url,data)      .then(response => {        resolve(response.data);      },err => {        reject(err)      })  })}/** * 封裝導出Excal文件請求 * @param url * @param data * @returns {Promise} */export function exportExcel(url,data = {}){  return new Promise((resolve,reject) => {    axios({      method: 'post',      url: url, // 請求地址      data: data, // 參數      responseType: 'blob' // 表明返回服務器返回的數據類型    })    .then(response => {      resolve(response.data);      let blob = new Blob([response.data], {type: "application/vnd.ms-excel"});      let fileName = "訂單列表_"+Date.parse(new Date())+".xls" ;      if (window.navigator.msSaveOrOpenBlob) {        navigator.msSaveBlob(blob, fileName);      } else {        var link = document.createElement('a');        link.href = window.URL.createObjectURL(blob);        link.download = fileName;        link.click();        window.URL.revokeObjectURL(link.href);      }    },err => {      reject(err)    })  })}/** * 封裝patch請求 * @param url * @param data * @returns {Promise} */export function patch(url,data = {}){  return new Promise((resolve,reject) => {    axios.patch(url,data)      .then(response => {        resolve(response.data);      },err => {        reject(err)      })  })}/** * 封裝put請求 * @param url * @param data * @returns {Promise} */export function put(url,data = {}){  return new Promise((resolve,reject) => {    axios.put(url,data)      .then(response => {        resolve(response.data);      },err => {        reject(err)      })  })}