xss 例子：https://www.cnblogs.com/dolphinX/p/3391351.html
防御：对输入过滤，对输出编码
https://www.cnblogs.com/digdeep/p/4695348.html
DDOS攻击：https://blog.csdn.net/Gerald_Jones/article/details/82015302
防御：隐藏IP
https://www.williamlong.info/archives/4339.html
https://blog.csdn.net/fanren224/article/details/79693872
