wx.getStorage（wx.getStorageSync）、 
wx.clearStorage（wx.clearStorageSync） 

wx.setStorage({
 key:"key",
 data:"value",
 success:function(res){console.log(res)},
 fail:function(res){console.log(res)},
 complete:function(res){console.log(res)},
})
//Object {errMsg: "setStorage:ok"}
//Object {errMsg: "setStorage:ok"}

wx.setStorageSync('key', 'value')

wx.setStorage({key:"ob",data:{name:'smallerpig',sex:1,age:18}})

wx.getStorage(
{
 key:'key',
 success:function(res){
  console.log(res)//Object {errMsg: "getStorage:ok", data: "value1"}
 },
 fail:function(res){console.log(res)},
 complete:function(res){console.log(res)}
})

wx.getStorageSync('ob')
//Object {name: "smallerpig", sex: 1, age: 18}

wx.getStorageInfo({
 success: function(res) {
 console.log(res.keys)
 console.log(res.currentSize)
 console.log(res.limitSize)
 }
//["logs", "r3session", "key"]0: "logs"1: "r3session"2: "key"]
//1
//10240
})

@app.route('/user/getuserinfo', methods=['GET', 'POST'])
def getuserinfo():
 code = request.data
 url = 'https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code' % (appid, secret, code)
 r = requests.get(url)
 j = json.loads(r.text)
 r3session_key = binascii.hexlify(os.urandom(64))
 cache.set(r3session_key, j['session_key'])
 return r3session_key

wx.request({
 url: 'https://***.smallerpig.com/user/getuserinfo',
 data: r.code,
 method: 'POST',
 success: function(res){
 wx.setStorageSync('r3session', res.data)
 }
})

wx.getUserInfo({
 success: function (res) {
 that.globalData.userInfo = res.userInfo
 typeof cb == "function" && cb(that.globalData.userInfo)
 //将本地存储中的r3session值也同样传递到我的服务器，在服务器中找出微信给到我们的session_key
 var r3session = wx.getStorageSync('r3session')
 res.r3session = r3session
 wx.request({
  url: 'https://***.smallerpig.com/user/getuserunionid',
  data: res,
  success: function(res){
  // success
  console.log(res)
  },
 })
 }
})

@app.route('/user/getuserunionid', methods=['GET', 'POST'])
def getuserid():
 r = json.loads(request.data)
 encryptedData = r['encryptedData']
 iv = r['iv']
 xcx_session_key = r['r3session']
 session_key = cache.get(xcx_session_key) # 从缓存中取出对应r3session对应的session_key
 pc = WXBizDataCrypt(appid, session_key)
 return pc.decrypt(encryptedData, iv)