// 云函数入口文件

const cloud = require('wx-server-sdk')

//npm   install  request-promise

const rp = require('request-promise');

cloud.init()

// 云函数入口函数

exports.main = async (event, context) => {

  //appid   和秘钥

  const appid = 'wxxxxxxxx',

     secret = 'xxxxxxxxxxxx';

  const AccessToken_options = {

     method: 'GET',

     url: 'https://api.weixin.qq.com/cgi-bin/token',

     qs: {

       appid,

       secret,

       grant_type:'client_credential'

     },

     json: true

   };

  //获取AccessToken

  const resultValue = await rp(AccessToken_options);

  const token = resultValue.access_token;

  //获取小程序码配置

  const code_options = {

     method: 'POST',

     url: 'https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token='+token,

     body: {

       'page': "pages/index/index",

         'width': 430,

         'scene': "1111"

       },

     json: true ,

      encoding: null

   };

  //获取二进制图片

  const buffer = await rp(code_options);

  //数据大于10K   上传到云

  if (buffer.length>1024*10) {

     const upload = await cloud.uploadFile({

       cloudPath: 'demo5561.jpg',

       fileContent: buffer,

     })

     return { upload}

   }

  return { reslut:buffer}

}