(ASP script attack and defense manual, 1. Introduction to technical background With the rapid development of the Internet, various large and small websites continue to appear. Among these large and small websites, dynamic websites have a certain advantage due to their practicality and diversity. . In the dynamic website, the webmaster mostly uses ASP, PHP and JSP script as the system to set up. Judging from the current domestic situation, the ASP system is favored by various webmasters because of its ease of use, compatibility (it does not rule out Microsoft's exclusive reasons), and the abundance of ASP source code on the Internet. This can be clearly seen by searching. displayed. (As shown in Figures 1 and 2) are the common keywords used in Google and Baidu to find ASP systems.asp? Result with id=1.)