- Socket详解 : https://www.jianshu.com/p/066d99da7cbd
- 并发编程 : https://python-parallel-programmning-cookbook.readthedocs.io/zh_CN/latest/index.html
- 事件循环 : https://lotabout.me/2017/understand-python-asyncio/
- IO模型 : https://www.jianshu.com/p/511b9cffbdac
- Tornado中文文档 : https://www.osgeo.cn/tornado/guide.html