<?
/**
  * Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/) 
  * Copyright (C) 2002 The Nucleus Group
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  * (see nucleus/documentation/index.html#license for more info)
  *
  * Nucleus RSS syndication channel skin
  */
header("Pragma: no-cache");
// $CONF['Self'] = $PHP_SELF;
$CONF['Self'] = "xml-rss.php";
include('config.php');
if (!$CONF['DisableSite']) {
	// get feed into $feed
	ob_start();
		selectSkin('xmlrss');
		selector();
	$feed = ob_get_contents();
	ob_end_clean();
	
	// create ETAG (hash of feed)
	$eTag = md5($feed);	
	header('Etag: "'.$eTag.'"');
	
	// compare Etag to what we got
	// TODO: serverVar doesn't seem to work :((
	if ($eTag == serverVar('HTTP_IF_NONE_MATCH')) {	
		header("HTTP/1.0 304 Not Modified");
		header('Content-Length: 0');
	} else {
		// dump feed
		echo $feed;
	}
		
} else {
	// output empty RSS file...
	// (because site is disabled)
	
	echo '<' . '?xml version="1.0" encoding="UTF-8"?' . '>';
	
	?>
	<!DOCTYPE rss PUBLIC "-//Netscape Communications//DTD RSS 0.91//EN" "http://my.netscape.com/publish/formats/rss-0.91.dtd">

	<rss version="0.91">

	  <channel>
	    <title></title>
	    <link></link>
	    <description></description>
	    <docs>http://backend.userland.com/rss091</docs>
 	  </channel>
	</rss>	
	<?
}

?>
