cookie matching + regex

[Kevin]

Hello,

 

This might be more of a regular expression question , but I am trying to
strip all cookies except ones with a prefix that matches.

 

The cookie name would be something like this :

 

Auth_cookie_asldkfjasdfkasdjflaksdjkjflj

 

 

Where the last part of the cookie name would be a random MD5 hash that is
generated differently for each session.

 

If I wanted to match all cookies with "auth_cookie_" in the name (like
auth_cookie_(.*) in a query such as this : 

 

set req.http.Cookie = regsuball(req.http.Cookie, ";(auth_cookie)=", ";
\1=");

 

How would I set it to match only the first part of the cookie that is
non-random? 

 

Thanks in advance!

 

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