饥人谷天气接口：

http://api.jirengu.com/getWeather.php

豆瓣API接口：

api.douban.com/v2/movie/top250

http://api.douban.com/v2/movie/top250

深入理解javascript之typeof和instanceof

Wireshark抓包介绍和TCP三次握手分析

https://blog.csdn.net/xifeijian/article/details/9280435