getUserInfo: function(e) {
  app.globalData.userInfo = e.detail.userInfo
    this.setData({
      userInfo: e.detail.userInfo,
      hasUserInfo: true
    })
    wx.login({
      success: res => {
        app.globalData.usercode = res.code    //1. 获取usercode作为后面获取openid的参数
      }
    })

      var id=null
    id=wx.getStorageSync(‘openid‘)
    if (!id)
    {

      wx.request({
        url: getOpenId, //set in config .js  //2.后台API
        method: "POST",
        data: {
          js_code: app.globalData.usercode,
        }, success(res) {
          var openId = res.data.openid
          var sessionKey = res.data.session_key
          console.log(res)
          wx.setStorageSync("openid", openId)
          app.globalData.openId = openId
          if (!!openId) {      //3.获取到openid后的处理，可以依照自己的逻辑写
            app.globalData.openId = openId
            wxlogin(openId)
          }
        }
      })
    }

    
  }
})

router.post(‘/wxgetOpenId‘, function (req, res, next) {  
  var data=req.body
  var APP_URL=‘https://api.weixin.qq.com/sns/jscode2session‘
  var APP_ID=‘wxXXXXXXXXX‘   //小程序的app id ，在公众开发者后台可以看到
  var APP_SECRET=‘8ad6f0XXXXXXXXXXXX‘  //程序的app secrect，在公众开发者后台可以看到

  var resData=null 
  var thisRes=res
  if(!!data.js_code)
  {
 
    request(`${APP_URL}?appid=${APP_ID}&secret=${APP_SECRET}&js_code=${data.js_code}&grant_type=authorization_code`, (error, response, body)=>{
      console.log(‘statusCode:‘, response && response.statusCode)
      console.log(body)
      res.end(body)})
 
  }
})