linkHelper/app.js

// app.js
var http = require('utils/util.js');

App({
  data: {
    num: 0,
    link: ''
  },
  onLaunch() {
   this.getSetting()
  },
  getSetting(){
    var _this = this;
    wx.getSetting({
      success: function(res){
        if (res.authSetting['scope.userInfo']) {
          // 已经授权，可以直接调用 getUserInfo 获取头像昵称
          wx.getUserInfo({
            success:function (e){
              wx.setStorageSync('encryptedData',e.encryptedData)
              wx.setStorageSync('iv',e.iv)
              _this.checkSession()
            }
          })
        }else{//未授权
          wx.clearStorage()
          console.log("未授权--verified")
        }
      }
    })
  },
  checkSession (cb) {//判断微信登录是否过期
    var _this = this;
    wx.checkSession({
      success (cb) {
        //session_key 未过期，并且在本生命周期一直有效
        if(!wx.getStorageSync('isLogin')){
          _this.login(_this.data.link)
        }
      },
      fail() {
        // session_key 已经失效，需要重新执行登录流程
        _this.login(_this.data.link)
      }
    })
  },
  login(cb,errcb){
    var _this = this;
    wx.login({
      success (res) {
        console.log(res)
        if (res.code) {
          if(!wx.getStorageSync('encryptedData')||!wx.getStorageSync('iv')) return;
          wx.showLoading({
            title: '登录中',
          })
          // 发起网络请求 发送 res.code 到后台换取 openId, sessionKey, unionId
          http.req('/api/user/login', 'get', {
            code: res.code,
            encrypted_data:wx.getStorageSync('encryptedData'),
            iv: wx.getStorageSync('iv'),
          }, (res) => {
            if(res && res.errno == 0){
              wx.hideLoading()
              //成功
              wx.setStorageSync('session_key',res.rst.session_key)
              wx.setStorageSync('userInfo',res.rst)
              wx.setStorageSync('isLogin',true)
              cb?cb():''
              _this.data.num = 0;
            }else{
              wx.clearStorage()
              // errcb?errcb(res.err):'';
              if(res.errno=='1004'&&_this.data.num<5) {
                _this.data.num =  Number(_this.data.num)+1
                _this.data.link = cb;//保存设置的回调地址
                _this.getSetting();
              }
            }
          },()=>{
            errcb?errcb():'';
            wx.hideLoading()
          })
        } else {
          console.log('登录失败！' + res.errMsg)
        }
      }
    })
  },
  shareEvent(res,self_page){//分享
    var pages = getCurrentPages() //获取加载的页面
    var currentPage = pages[pages.length-1] //获取当前页面的对象
    var url = currentPage.route //当前页面url
    var options = currentPage.options
    var path = '';
    for(var i in options){
      path += '&' + i + '=' + options[i]
    }
    var path2 = url + "?" + path.substr(1)
    if(res.from === 'button'){
      //来自页面内转发按钮
    }
    return{
      title:'扩展链接高佣版',
      imageUrl:'https://kx-gw.oss-cn-beijing.aliyuncs.com/app-gw/linkHelp.png?v='+(wx.getStorageSync('version')?wx.getStorageSync('version'):'1.0.2'),
      path: self_page?self_page:path2
    }
  },
  func: {
    req: http.req,
  },
})