Setting a cookie on a different domain

[webmigit]

Lets say I have two domains...

MySite.com
Example.com

And I want to set a cookie on example.com that can be read by mysite.com, I don't care if it can be read by example.com.

I thought this would be the code I would use to achieve this:

<cfcookie
expires=&quot;never&quot; name=&quot;hiname&quot;
domain=&quot;.mysite.com&quot; value=&quot;steve&quot;>

All this code seems to do is require the user to be on mysite.com before the cookie can be set. Both domains are on the same server.

If I run example.com/setcook.cfm nothing happens, but if I run mysite.com/setcook.cfm the cookie is set for mysite. Problem is that does me absolutely no good.

Anyone got a solution to set this cookie? Just trying to set a simple firstname.

ALFII.com

http://www.alfii.com

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[csteinhilber]

I always learned that cookies from one domain could not be read by another domain, period. That's part of the built-in security of cookies... at least, that's my understanding.

In fact, without the SETDOMAINCOOKIES attribute set on your CFAPPLICATION tag, ColdFusion won't even allow you to share cookies across subdomains.

What if the page on example.com loaded in the setcook.cfm page from mysite.com in a hidden frame (or iframe) or perhaps a pop-up that immediately closes itself.

I believe that's the way the ad tracker agencies do it. Since the browser is actually hitting mysite.com, you should be able to set a cookie for that domain... even though the user is actually visiting example.com.

OR... I don't know what you're wanting to do with the cookie, but perhaps you can do it without using cookies... perhaps having the example.com page call a webservice from mysite.com (or vice versa) to share information.


-Carl