Plugin to check http headers

Hi, I’m in need of a check plugin very close in functionality to check_http but I need to be able to check for a regex in the HTTP response headers, not the page content.
It would not be too hard to throw something together with curl, but figured I’d ask first to avoid reinventing the wheel.

nagiosexchange.org/cgi-bin/p … x.html;d=1
nagiosexchange.org/cgi-bin/p … 3.html;d=1

Thanks, I ended up using WebInject, which I was already using elsewhere, just didn’t realize that it could match on headers too! It does everything I needed it to and more. What a great tool.