Keep URL after a redirect

Hi Guys,

I have an iRule that perform a redirect to an external website. I need to keep the original URL when the redirect is done.

Ex:

when HTTP_REQUEST {
if { [string tolower [HTTP::path]] contains "/sfnetios_xp"}
{
HTTP::respond 301 noserver Location http://example.com[HTTP::uri]

}

}

The original URL is www.testing.com and should be kept in the browser.

Thanks.