ASP anti-hotlink code (completely blocks resources in the download site of Thunder, Tornado, and Express), determines whether it is downloaded by a download tool, and if so, a 404 error will be reported. Copy the code code as follows:
<%
'Block mainstream download tools
Dimxurl,xtool
'Get browser AGENT
xurl=lcase(Request.ServerVariables(HTTP_USER_AGENT))
'Define prohibited AGENTs. The following 5 include the latest versions of Express, Tornado and Thunder. You can add them by yourself!
xtool=mozilla/4.0(compatible;msie5.00;windows98)&_
mozilla/4.0(compatible;msie6.0;windows+nt5.0)&_
mozilla/4.0(compatible;msie6.0;windowsnt5.1;)&_
mozilla/4.0(compatible;msie6.0;windowsnt5.0;.netclr1.1.4322)&_
mozilla/4.0(compatible;msie6.0;windowsnt5.0;.netclr3.5.20706)&_
mozilla/4.0(compatible;msie6.0;windowsnt5.1;sv1;.netclr1.1.4322;.netclr2.0.50727)
'Determine whether the AGENT is legal
IfInStr(xtool,xurl)>0Then
'The download tool directly reports a 404 error
Response.Status=404NotFound
Response.End
EndIf
'Other code is below
Response.Write browses the content normally. You can use the download tool to test download the page to see if it can be downloaded?
%>