https://blog.csdn.net/xxq929604980/article/details/82733981?utm_term=swoole%E7%AE%A1%E7%90%86%E8%BF%9B%E7%A8%8B&utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2%7Eall%7Esobaiduweb%7Edefault-1-82733981&spm=3001.4430
1：https://cnodejs.org/topic/557c354d16839d2d539362b6 2：https://segmentfault.com/a/1190000020036097