copy page with HTTP request

Hello,
I want to make a mirror of a website using wordpress. Withour wordpress I just use

$homepage = file_get_contents(‘www.domain.com’.$_SERVER[‘REQUEST_URI’]);
echo $hompage;

and I have a fully working mirror.

On wordpress I use:

$url = ‘http://www.domain.com’;
$request = new WP_Http;
$result = $request->request( $url );
$json = $result[‘body’];
echo $json;

I can take a new domain and make the mirror availalbe under it

which works fine. But:

after file_get_contens I am able to use newdomain.com/subpage to go to a subpage. In WP that does not work.

Has anyone help? I hope I mde my problem clrar :/

Thanks!