WordPress/wp-rss2.php

<?php 
$blog=1;
$doing_rss=1;
header('Content-type: text/xml');

include('blog.header.php');

// Handle Conditional GET

// Get the time of the most recent article
$sql = "SELECT max(post_date) FROM $tableposts";

$maxdate = $wpdb->get_var($sql);
++$querycount;

$unixtime = strtotime($maxdate);

// format timestamp for Last-Modified header
$clast = gmdate("D, d M Y H:i:s \G\M\T",$unixtime);
$cetag = md5($last);

$slast = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
$setag = $_SERVER['HTTP_IF_NONE_MATCH'];

// send it in a Last-Modified header
header("Last-Modified: " . $clast, true);
header("Etag: " . $cetag, true);

// compare it to aggregator's If-Modified-Since and If-None-Match headers
// if they match, send a 304 and die

// This logic says that if only one header is provided, just use that one,
// but if both headers exist, they *both* must match up with the locally
// generated values.
//if (($slast?($slast == $clast):true) && ($setag?($setag == $cetag):true)){
if (($slast && $setag)?(($slast == $clast) && ($setag == $cetag)):(($slast == $clast) || ($setag == $cetag))) { 
	header("HTTP/1.1 304 Not Modified");
	echo "\r\n\r\n";
	exit;
}

if (!isset($rss_language)) { $rss_language = 'en'; }
if (!isset($rss_encoded_html)) { $rss_encoded_html = 0; }
if (!isset($rss_excerpt_length) || ($rss_encoded_html == 1)) { $rss_excerpt_length = 0; }
?>
<?php echo "<?xml version=\"1.0\"?".">"; ?>
<!-- generator="wordpress/<?php echo $b2_version ?>" -->
<rss version="2.0" 
	xmlns:content="http://purl.org/rss/1.0/modules/content/">

<channel>
	<title><?php bloginfo_rss("name") ?></title>
	<link><?php bloginfo_rss("url") ?></link>
	<description><?php bloginfo_rss("description") ?></description>
	<language><?php echo $rss_language ?></language>
	<copyright>Copyright <?php echo mysql2date('Y', get_lastpostdate()); ?></copyright>
	<pubDate><?php echo gmdate('r'); ?></pubDate>
	<generator>http://wordpress.org/?v=<?php echo $b2_version ?>"</generator>

	<?php $items_count = 0; if ($posts) { foreach ($posts as $post) { start_b2(); ?>
	<item>
		<title><?php the_title_rss() ?></title>
		<link><?php permalink_single_rss() ?></link>
		<comments><?php comments_link(); ?></comments>
		<pubDate><?php the_time('r'); ?></pubDate>
		<author><?php the_author() ?> (mailto:<?php the_author_email() ?>)</author>
		<category><?php the_category_rss() ?></category>
		<guid isPermaLink="false"><?php echo $id; ?>@<?php bloginfo_rss("url") ?></guid>
<?php $more = 1; if ($rss_use_excerpt) {
?>
		<description><?php the_excerpt_rss($rss_excerpt_length, 2) ?></description>
<?php
} else { // use content
?>
		<description><?php the_content_rss('', 0, '', $rss_excerpt_length, 2) ?></description>
<?php
} // end else use content
?>
		<content:encoded><![CDATA[<?php the_content('', 0, '') ?>]]></content:encoded>
	</item>
	<?php $items_count++; if (($items_count == $posts_per_rss) && empty($m)) { break; } } } ?>
</channel>
</rss>