nodejs动态创建二维码的方法

<!--弹出二维码--><div class="qrcode">  <div>    <p id="saoma">扫描二维码</p>  </div></div>

$.ajax({   type: 'POST',   url: '/house',   data: {     data:'你的数据'   },   dataType: 'json',   success: function (data) {     if (data.code == 0) {        alert("成功");        $('#saoma').before('<img class="qrcode_show" src="/newQrCode?url='+ data.data +'"alt=""/>');            }else {        alert('失败');     }   }})

var express = require('express');var request = require('request');var url = require('url');var qrImg = require('qr-image');//生成二维码app.get('/newQrCode', function (req, res) {  var par = url.parse(req.url, true).query;  var thisUrl = par.url;  var thisParam = par.id;  var imgUrl = thisUrl + '?id=' + thisParam;  var img = qrImg.image(imgUrl, { size: 10 });  res.writeHead(200, { 'Content-Type': 'image/png' });  img.pipe(res);});

var bodyParser = require('body-parser');var urlencodeRarser = bodyParser.urlencoded({ extended: false });app.post('/house',urlencodeRarser,function (req, res) {  var data = req.body;  var result = JSON.stringify({code:0, data:'http://www.baidu.com/&id=' + data.data});  //console.log(result)  res.end(result);});