gnu-social/socialfy-your-domain/xrd/index.php

<?php

/*
 * GNU social
 * Copyright (C) 2010, Free Software Foundation, Inc
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


$s = "";

/* this should be a secret */

$u = $_GET['uri'];

$u = substr($u, 5);

$f = $s . $u . ".xml";

if (file_exists($f)) {
  $fh = fopen($f, 'r');
  $c = fread($fh, filesize($f));
  fclose($fh);
  header('Content-type: text/xml');
  echo $c;
}


?>