ASP - Determine if current Script is being run as an include

Question

Lets say I have the following pages:

# Include.asp
<%
Response.Write IsIncluded() & "<br>"

%>

# Outside.asp
<!--#include file="Include.asp" -->

I need this to work such that if I access http://Example.com/Include.asp directly, I see "True", yet if I access http://Example.com/Outside.asp I see False. I'd perfer not to have to add anything to Outside.asp. Can anyone think of a way to create such an IsIncluded function in ASP? I was able to create such a function in PHP by comparing __FILE__ to $_SERVER['PHP_SELF'], but that won't work here becasue ASP doesn't have anything like __FILE__ that I am aware of.

Answer 1

Try checking the URL requested and match it against the include. Example provided in JavaScript

function IsIncluded() {
  var url = String(Request.ServerVariables("URL"));
  url = url.substring(0, url.indexOf("?")).substring(0, url.indexOf("#")).substr(url.lastIndexOf("/"));
  return (url == "Include.asp")
}

Answer 2

Generally in ASP its not good practice to have an include file also available as something that can be fetched by the client. If you specifically want to prevent the client fetching an include file then place your includes in a folder (called say "Includes") then block access to that folder in IIS.

OTH if you do want the user to be able to access the include file pretty much as it is and also allow other pages to include it then create a "host" page for the include. E.g.:-

# /Includes/Include.asp
<%
%>

# IncludeHost.asp
<!-- #include virtual="/Includes/Include.asp" -->

# Outside.asp
<!-- #include virtual="/Includes/Include.asp" -->
<%
   '' #Other content/code here
%>

You could now move code and content that were unique to "include.asp" when it was being accessed directly to the IncludeHost.asp file.