cjson网址：https://sourceforge.net/projects/cjson/
MyTinySTL网址：https://github.com/Alinshans/MyTinySTL
oatpp网址：https://github.com/oatpp/oatpp
Tinyhttpd网址：https://github.com/EZLippi/Tinyhttpd/blob/master/httpd.c
nginx网址：http://nginx.org/
Redis网址：https://redis.io/download
数据库：https://cstack.github.io/db_tutorial/
https://www.jianshu.com/p/a12597cd6a44
https://www.cnblogs.com/liangxiaofeng/p/5678352.html
//libev
https://blog.csdn.net/drdairen/article/details/53785447
https://github.com/chenhaoact/github-project-recommend