help with cookie expiration in iRule

The Set-Cookie header is specified in RFC 2109 - HTTP State Management Mechanism (Click here).

4.2.2  Set-Cookie Syntax
   The syntax for the Set-Cookie response header is
   set-cookie      =       "Set-Cookie:" cookies
   cookies         =       1cookie
   cookie          =       NAME "=" VALUE *(";" cookie-av)
   NAME            =       attr
   VALUE           =       value
   cookie-av       =       "Comment" "=" value
                   |       "Domain" "=" value
                   |       "Max-Age" "=" value
                   |       "Path" "=" value
                   |       "Secure"
                   |       "Version" "=" 1*DIGIT

Looks like you'll want to use the "Max-Age" value that's defined as follows:

Max-Age=delta-seconds

Optional. The Max-Age attribute defines the lifetime of the

cookie, in seconds. The delta-seconds value is a decimal non-

negative integer. After delta-seconds seconds elapse, the client

should discard the cookie. A value of zero means the cookie

should be discarded immediately.

In Netscapes original proposal, there is also an "Expires" header that believe most browsers still support which takes as an argument a date string.

-Joe