第六课：后端代理

1.在dev-server.js
定义apiRouters，这样就是不直接去请求服务端，是先请求dev-ser.js 然后再请求服务器.欺骗服务器我们的refer和host

var axios = require('axios')//XXXXXXXXXXXXXXXXXXXXXXXXXXXXvar apiRoutes = express.Router()apiRoutes.get('/getDiscList', function (req, res) {  var url = 'https://c.y.qq.com/splcloud/fcgi-bin/fcg_get_diss_by_tag.fcg'  axios.get(url, {    headers: {      referer: 'https://c.y.qq.com/',      host: 'c.y.qq.com'    },    params: req.query  }).then((response) => {  //QQ的response    res.json(response.data) //res 我们自己的返回  }).catch((e) => {    console.log(e)  })})app.use('/api', apiRoutes)  //此地址就变成了`/api/getDiscList` 给recommend.js来请求

2.引入axios

 "axios": "^0.16.1",

3.recommd.js
import axios

export function getDiscList() {  const url = '/api/getDiscList'  const data = Object.assign({}, commonParams, {    platform: 'yqq',    hostUin: 0,    sin: 0,    ein: 29,    sortId: 5,    needNewCode: 0,    categoryId: 10000000,    rnd: Math.random(),    format: 'json'  })  return axios.get(url, {    params: data  }).then((res) => {    return Promise.resolve(res.data)  })}