Yes, I want to record what actions were performed from which IP. The reason I wanted to find the answer at %Request was because I was bothered by another question. My application is B/S structure, the front-end is implemented by React, and the method of getting local IP address by Javascripts is incompatible with IE, Chrome, Firefox and so on. Because Chrome is not compatible with ActiveX. If I can, I want to get the IP address in a unified way, compatible with the browsers above.