Redirect all Lighttpd traffic apart from one folder and index file

I want the following rule to be applied

$HTTP["host"] =~ "^www\.example\.com$" {
        url.redirect = ( "^/(.*)" => "http://ift.tt/1yP93mH" )
}

However if the user requests:

• index.html


• the root location i.e (www.example.com)


• tools/*

The request should be served normally

www.example.com/ -> Served normally

http://ift.tt/1MYvd1y -> Server normally

http://ift.tt/1j2EqSL -> http://ift.tt/1FfWO4N