CodeAve.com/ASP - Disclaimer/Referring Page Check

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Disclaimer/Referring Page Check

There are instances where you will want to verify that a user has clicked a link to get to certain content or that a disclaimer was viewed and "agreed to" by the user click. This example will check to see what the referring page to it was and it the referring page is not the same as the current page location than a default view will be displayed. Providing the user clicks on a link from that page then the content will be displayed.

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<html>
<body bgcolor="#FFFFFF">
<title>CodeAve.com(Disclaimer/Referring Page Check)</title>
<%
script_name = request.servervariables("script_name")
' variable script_name will contain the relative path of the page being requested
the_link= "http://" & request.servervariables("HTTP_HOST") & script_name
' variable the_link will contain http:// plus the rest of the URL prior to the first /
the_referer= request.servervariables("http_referer")
' variable the_referer tracks the last page the user was on prior to clicking the link
' that led them to the current page. If it was type into the address bar,
' clicked on from email or clicked on as a favorite the referer value will ne null
if (the_link <> the_referer) or (the_referer = "") then
'Check to see if the referring page is also the current page
' if not show the disclaimer and a link to the current page
%>
Disclaimer
 
You must read and agree to this prior to continuing on to the content
 
Click <a href="<%= script_name %>">here</a> to view content
 
Click <a href="javascript:history.go(-1)">here</a> to go back
<% else
' if the user has click a link on this page back to this page then the
' content will then display %>
Content
 
This will only display after the user has clicked a link 
making the referring and current page the same.
<% end if
' end check of referring page %>
</body>
</html>