nodejs获取微信小程序带参数二维码实现代码

var fs = require('fs'); var request = require('request'); var wx_conf = require('../../conf/wx_conf');//这里放了微信appid跟appSecret，文件没有引入进来，要用的时候，改一下吧。 var AccessToken = {  grant_type: 'client_credential',  appid: wx_conf.appId,  secret: wx_conf.appSecret } var wx_gettoken_url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=' + AccessToken.grant_type + '&appid=' + AccessToken.appid + '&secret=' + AccessToken.secret; //请求二维码的参数 var postData = {  path: "pages/index/index",  width: 430 } var createQrcode = {  create: function() {   console.log('fn：create');   this.getToken();  },  //获取微信的token  getToken: function() {   console.log('fn：getToken');   var that = this;   new Promise((resolve, reject) => {    console.log('进入Promise方法了');    request({     method: 'GET',     url: wx_gettoken_url    }, function(err, res, body) {     if (res) {      resolve({       isSuccess: true,       data: JSON.parse(body)      });     } else {      console.log (err);      reject({       isSuccess: false,       data: err      });     }    })   }).then(proData => {    that.getQrcode(proData);   });  },  //生成二维码  getQrcode: function(proData) {   console.log ('fn：getQrcode');   if (proData.isSuccess) {    postData = JSON.stringify(postData);    request({     method: 'POST',     url: 'https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=' + proData.data.access_token,     body: postData    }).pipe(fs.createWriteStream('./public/images/index.png'));//路径自己定义吧   } else {    console.log('Promise请求数据出错');   }  } } module.exports = createQrcode;//暴露对象，调用create方法既可以创建二维码