Get HTTP_REFERER in popup

[agflem]

Is there any way to grab the HTTP_REFERER server variable in a pop up?

Example:
www.site1.com pops open www.site2.com that needs to see if it was
popped from www.site1.com

Currently, that value is empty.

If not, are there any suggestions on how to test that a page was
spawned from a site and not just typed into the address bar?

 

[McKirahan]

Is there any way to grab the HTTP_REFERER server variable in a pop up?

Example:
www.site1.com pops open www.site2.com that needs to see if it was
popped from www.site1.com

Currently, that value is empty.

If not, are there any suggestions on how to test that a page was
spawned from a site and not just typed into the address bar?

Some firewall and web filtering software, such as some versions of Zone
Alarm, block HTTP_REFERER's by default.

Personal Firewalls
http://www.wykes.org/firewalls.html

"This is because some firewalls block certain (harmless) interactions with
this site. Some even block the transmission of http information, in direct
contravention of the accepted standards."

 

[Mark Schupp]

On the client-side you could check for the existence of a parent window
(window.opener). I don't know if you can get the URL of the opener if it is
a different site however.

 

[agflem]

Ah, good idea Thanks Mark ... I added a server side work around too
that checks for a key stored during login ... if there isn't a matching
key when site2 is spawned ... window.close();

 

[Dave Anderson]

Is there any way to grab the HTTP_REFERER server variable in a pop up?

I'm not sure what your workaround was, but this will do the job:

<A HREF="http://www.site2.com/" TARGET="tgtWin"
ONCLICK="window.open('',this.target, ...)">Click Me</A>



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