详解axios中封装使用、拦截特定请求、判断所有请求加载完毕）

'use strict';
import axios from 'axios';

// 自动识别接口使用开发环境地址（开发环境地址做了 proxyTable 代理，故设置为空）或线上地址
axios.defaults.baseURL = process.env.NODE_ENV === 'production' ? process.env.API_ROOT : '';
// 开发环境直接打包测试
// axios.defaults.baseURL = '';

axios.interceptors.request.use(config => {
 return config;
}, error => {
 console.log(error);
 return Promise.reject(error);
});

axios.interceptors.response.use(res => {
 const apiRes = res.data;
 return apiRes;
}, async error => {
 console.dir(error);
 return Promise.reject(error);
});

export default axios;

api/index.js 调用后端提供的接口
import Ax from '@/service/axios';
import qs from 'qs';

export default {
 fetchBlog (reqData) {
  return Ax.get('/krryblog/blog/getBlog', {params: reqData});
 },
 addBlog (reqData) {
  return Ax.post('/krryblog/blog/addBlog', qs.stringify(reqData));
 },
 updateBlog (reqData) {
  return Ax.post('/krryblog/blog/updateBlog', qs.stringify(reqData));
 },
 deleteBlogCover (id, reqData) {
  return Ax.post(`/krryblog/blog/deleteBlogCover/${id}`, qs.stringify(reqData));
 },
};

import Api from './api';

export async function getBlog(reqData) {
 let res = await Api.fetchBlog(reqData);
 return res;
},
export async function addBlog (reqData) {
 let res = await Api.addBlog(reqData);
 return res;
},
export async function updateBlog (reqData) {
 let res = await Api.updateBlog(reqData);
 return res;
},
export async function deleteBlogCover (id, reqData) {
 let res = await Api.deleteBlogCover(id, reqData);
 return res;
},

import { getBlog } from '@/service'
export default {
 data() {
  return {
   tableData: [],
   pageIndex: 1,
   pageSize: 9
  }
 },
 created() {
  this.getList();
 },
 methods: {
  async getList() {
   let { result } = await getBlog({
    pageIndex: this.pageIndex,
    pageSize: this.pageSize
   });
  this.tableData = result.data;
 },
}

async getList() {
 let resArr = []
 for (let val of this.arrId) {
  // push 请求
  resArr.push(queryPropertyValue({ id: val }))
 }
 this.tableData = []
 Promise.all(resArr).then(res => {
  for (let val of res) {
   let vals = val.result.propertyValues
   // 每个请求的结果 push 到 tableData
   vals.forEach(item => this.tableData.push(item))
  }
 })
},

// 根据 id 获取某一条商品数据
let getDetail = (id)=>{
 return axios.get(`/detail?bid=${id}`);
}

// 检测登录的用户是否将此商品加入购物车
let detectCar = (shopId,userId)=>{
 return axios.get(`/detectCar?shopId=${shopId}&userId=${userId}`);
}

// 获取一条商品数据、并且检测是否加入购物车
let getDeAll = (shopId,userId)=>{
 axios.all([
  getDetail(shopId),
  detectCar(shopId,userId)
 ]).then(axios.spread((resDetail, resCar)=>{
  // 两个请求现已完成
  // 打印两个请求的响应值 
  console.log(resDetail);
  console.log(resCar);
 }));
}

axios#request(config)
axios#get(url [,config])
axios#delete(url [,config])
axios#head(url [,config])
axios#post(url [,data [,config]])
axios#put(url [,data [,config]])
axios#patch(url [,data [,config]])

axios.interceptors.request.use(config => {
 // 判断请求是否是 getClassify，如果是 getClassify，不加载 LoadingBar
 let url = config.url;
 if (url.split('/').pop() === 'getClassify') {
  flag = false;
 } else {
  iView.LoadingBar.start();
  flag = true;
 }
 return config;
}, error => {
 console.log(error);
 return Promise.reject(error);
});

let reqNum = 0
axios.interceptors.request.use(function (config) {
 // 在请求发出之前进行一些操作，每次发出请求就 reqNum++
 reqNum++
 _bus.$emit('showloading')
 return config
}

axios.interceptors.response.use(response => {
 // 接受请求后 reqNum--，判断请求所有请求是否完成
 reqNum--
 if (reqNum <= 0) {
  _bus.$emit('closeLoading')
 } else {
  _bus.$emit('showloading')
 }
})

saveNormalAds (reqData) {
 return Ax.post('/index.php?krry', qs.stringify(reqData));
},