add flag to http header based on which pool is selected

Not sure that I understand. Where in the HTTP Header would this information be inserted? We would like to be able to insert this information somewhere where it can be retrieved, such as in a cookie or response variable, for example:

 

 

GET / HTTP/1.1

 

Host: www.em.avnet.com

 

Connection: close

 

Accept-Encoding: gzip

 

Accept: */*

 

Accept-Language: en-us

 

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; (R1 1.5); .NET CLR 1.1.4322) Web-Sniffer/1.0.24

 

Referer: http://web-sniffer.net/

 

Cookie: population_group=crawler

 

 

HTTP Status Code: HTTP/1.1 200 OK

 

Server: Microsoft-IIS/5.0

 

Date: Thu, 15 Feb 2007 16:57:21 GMT

 

Connection: close

 

Set-Cookie: population_group=crawler; path=/; expires=Saturday, 06-Sep-2014 23:50:08 GMT

 

Cache-control: private

 

Content-Type: text/html

 

 

Any ideas on how to add this information to the cookies in the header?