利用promise及参数解构封装ajax请求的方法

// index.js
var express = require('express');
var router = express.Router();

/* GET home page. */
var products = [
 {
 lid:1,
 pname:'笔记本',
 price:3400
 },
 {
 lid:2,
 pname:'手机',
 price:5400
 },
 {
 lid:3,
 pname:'iPad',
 price:6400
 }
]

router.get('/', function(req, res, next) {
 res.send(products)
});

router.get('/details', function(req, res, next){
 var lid = req.query.lid
 res.send(products[lid])
})

module.exports = router;

// user.js
var express = require('express');
var router = express.Router();

/* GET users listing. */
router.post('/', function(req, res, next) {
 var uname = req.body.uname
 var upwd = req.body.upwd
 if(uname === 'lili' && upwd === '123456'){
 res.send('登陆成功')
 }else{
 res.send({
  code: 0,
  message: '用户名或密码错误'
 })
 }
});

module.exports = router;