WAF绕过:

https://mp.weixin.qq.com/s?__biz=MzUzOTM4MzEyMw==&mid=2247485242&idx=1&sn=9fa1ac1d79b9d136873f71b8bfab7ab8&chksm=fac80306cdbf8a10035780ce1e7bb3f045eab7bd51353ffc8f604cdc5a5c6cdb735989bbc877&mpshare=1&scene=23&srcid=&sharer_sharetime=1578924635747&sharer_shareid=3fadefa816455ac91926a15828bd5285#rd