.htaccess to pass FULL URL into other PHP link as $_GET

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http://serverfault.com – From .htacces file, how to pass/redirect the FULL URL to another URL as GET Variable? Like: http://www.test.com/foo/bar.asp will be redirected to: http://www.newsite.com/?url=http://www.test.com/foo/bar.asp With Full Url with Domain.I tried: RewriteEngine on RedirectMatch 301 ^/(.*)\.asp http://www.newsite.com/?url=%{REQUEST_URI} But it is going out like: http://www.newsite.com/?url=?%{REQUEST_URI} (HowTos)