Do non-capturing reg exp work in irules?

Hi Cole -

That's because within a replacement string, an ampersand (&) takes on the value of the string that the regex matched, and your $replace value ends with &.

If you intended to terminate the replacement string with a literal "&", you need to escape it:

set replace {href=http://proxy.dandd.com/pxy?orig_url=http://%newhost%\&}

The next problem you will run into is that the .* will match from the first "href=" to the end of the payload (greedy match), so you'll need to specify a term characer and a non-greedy wildcard. And most (all?) href target strings are surrounded with "", so you might also want to account for that.

This should be close to what you're looking for:

set find {(?:href=\")(.*?\")}
set replace {href=\"http://proxy.dandd.com/pxy?orig_url=http://%newhost%}
set subs [regsub -all -nocase $find $payload "$replace\\1" new_response] 

HTH

/deb