Файл: textpattern-4.5.7/textpattern/publish/rss.php
Строк: 259
<?php
/*
This is Textpattern
Copyright 2005 by Dean Allen - all rights reserved.
Use of this software denotes acceptance of the Textpattern license agreement
$HeadURL: https://textpattern.googlecode.com/svn/releases/4.5.7/source/textpattern/publish/rss.php $
$LastChangedRevision: 4011 $
*/
// -------------------------------------------------------------
function rss()
{
global $prefs,$thisarticle;
set_error_handler('feedErrorHandler');
ob_clean();
extract($prefs);
extract(doSlash(gpsa(array('limit','area'))));
// build filter criteria from a comma-separated list of sections and categories
$feed_filter_limit = get_pref('feed_filter_limit', 10);
$section = gps('section');
$category = gps('category');
if (!is_scalar($section) || !is_scalar($category)) {
txp_die('Not Found', 404);
}
$section = ($section ? array_slice(array_unique(do_list($section)), 0, $feed_filter_limit) : array());
$category = ($category ? array_slice(array_unique(do_list($category)), 0, $feed_filter_limit) : array());
$st = array();
foreach ($section as $s)
{
$st[] = fetch_section_title($s);
}
$ct = array();
foreach ($category as $c)
{
$ct[] = fetch_category_title($c);
}
$sitename .= ($section) ? ' - '.join(' - ', $st) : '';
$sitename .= ($category) ? ' - '.join(' - ', $ct) : '';
$dn = explode('/',$siteurl);
$mail_or_domain = ($use_mail_on_feeds_id)? eE($blog_mail_uid):$dn[0];
// feed header
$out[] = tag('http://textpattern.com/?v='.$version, 'generator');
$out[] = tag(doSpecial($sitename),'title');
$out[] = tag(hu,'link');
$out[] = '<atom:link href="'.pagelinkurl(array('rss'=>1,'area'=>$area,'section'=>$section,'category'=>$category,'limit'=>$limit)).'" rel="self" type="application/rss+xml" />';
$out[] = tag(doSpecial($site_slogan),'description');
$last = fetch('unix_timestamp(val)','txp_prefs','name','lastmod');
$out[] = tag(safe_strftime('rfc822',$last),'pubDate');
$out[] = callback_event('rss_head');
// feed items
$articles = array();
$section = doSlash($section);
$category = doSlash($category);
if (!$area or $area=='article') {
$sfilter = (!empty($section)) ? "and Section in ('".join("','", $section)."')" : '';
$cfilter = (!empty($category))? "and (Category1 in ('".join("','", $category)."') or Category2 in ('".join("','", $category)."'))" : '';
$limit = ($limit) ? $limit : $rss_how_many;
$limit = intval(min($limit,max(100,$rss_how_many)));
$frs = safe_column("name", "txp_section", "in_rss != '1'");
if ($frs) foreach($frs as $f) $query[] = "and Section != '".doSlash($f)."'";
$query[] = $sfilter;
$query[] = $cfilter;
$expired = ($publish_expired_articles) ? '' : ' and (now() <= Expires or Expires = '.NULLDATETIME.') ';
$rs = safe_rows_start(
"*, unix_timestamp(Posted) as uPosted, unix_timestamp(LastMod) as uLastMod, unix_timestamp(Expires) as uExpires, ID as thisid",
"textpattern",
"Status = 4 ".join(' ',$query).
"and Posted < now()".$expired."order by Posted desc limit $limit"
);
if($rs) {
while ($a = nextRow($rs)) {
extract($a);
populateArticleData($a);
$cb = callback_event('rss_entry');
$a['posted'] = $uPosted;
$permlink = permlinkurl($a);
$summary = trim(replace_relative_urls(parse($thisarticle['excerpt']), $permlink));
$content = trim(replace_relative_urls(parse($thisarticle['body']), $permlink));
if ($syndicate_body_or_excerpt) {
# short feed: use body as summary if there's no excerpt
if (!trim($summary))
$summary = $content;
$content = '';
}
if ($show_comment_count_in_feed) {
$count = ($comments_count > 0) ? ' ['.$comments_count.']' : '';
} else $count = '';
$Title = escape_title(strip_tags($Title)).$count;
$thisauthor = get_author_name($AuthorID);
$item = tag($Title,'title').n.
(trim($summary) ? tag(n.escape_cdata($summary).n,'description').n : '').
(trim($content) ? tag(n.escape_cdata($content).n,'content:encoded').n : '').
tag($permlink,'link').n.
tag(safe_strftime('rfc822',$a['posted']),'pubDate').n.
tag(htmlspecialchars($thisauthor),'dc:creator').n.
tag('tag:'.$mail_or_domain.','.$feed_time.':'.$blog_uid.'/'.$uid,'guid', ' isPermaLink="false"').n.
$cb;
$articles[$ID] = tag($item,'item');
$etags[$ID] = strtoupper(dechex(crc32($articles[$ID])));
$dates[$ID] = $uPosted;
}
}
} elseif ($area=='link') {
$cfilter = ($category) ? "category in ('".join("','", $category)."')" : '1';
$limit = ($limit) ? $limit : $rss_how_many;
$limit = intval(min($limit,max(100,$rss_how_many)));
$rs = safe_rows_start("*, unix_timestamp(date) as uDate", "txp_link", "$cfilter order by date desc limit $limit");
if ($rs) {
while ($a = nextRow($rs)) {
extract($a);
$item =
tag(doSpecial($linkname),'title').n.
tag(doSpecial($description),'description').n.
tag(doSpecial($url),'link').n.
tag(safe_strftime('rfc822',$uDate),'pubDate');
$articles[$id] = tag($item,'item');
$etags[$id] = strtoupper(dechex(crc32($articles[$id])));
$dates[$id] = $date;
}
}
}
if (!$articles) {
if ($section) {
if (safe_field('name', 'txp_section', "name in ('".join("','", $section)."')") == false) {
txp_die(gTxt('404_not_found'), '404');
}
} elseif ($category) {
switch ($area) {
case 'link':
if (safe_field('id', 'txp_category', "name = '$category' and type = 'link'") == false) {
txp_die(gTxt('404_not_found'), '404');
}
break;
case 'article':
default:
if (safe_field('id', 'txp_category', "name in ('".join("','", $category)."') and type = 'article'") == false) {
txp_die(gTxt('404_not_found'), '404');
}
break;
}
}
} else {
//turn on compression if we aren't using it already
if (extension_loaded('zlib') && ini_get("zlib.output_compression") == 0 && ini_get('output_handler') != 'ob_gzhandler' && !headers_sent()) {
// make sure notices/warnings/errors don't fudge up the feed
// when compression is used
$buf = '';
while ($b = @ob_get_clean())
$buf .= $b;
@ob_start('ob_gzhandler');
echo $buf;
}
handle_lastmod();
$hims = serverset('HTTP_IF_MODIFIED_SINCE');
$imsd = ($hims) ? strtotime($hims) : 0;
if (is_callable('apache_request_headers')) {
$headers = apache_request_headers();
if (isset($headers["A-IM"])) {
$canaim = strpos($headers["A-IM"], "feed");
} else {
$canaim = false;
}
} else {
$canaim = false;
}
$hinm = stripslashes(serverset('HTTP_IF_NONE_MATCH'));
$cutarticles = false;
if ($canaim !== false) {
foreach($articles as $id=>$thing) {
if (strpos($hinm, $etags[$id]) !== false) {
unset($articles[$id]);
$cutarticles = true;
$cut_etag = true;
}
if ($dates[$id] < $imsd) {
unset($articles[$id]);
$cutarticles = true;
$cut_time = true;
}
}
}
if (isset($cut_etag) && isset($cut_time)) {
header("Vary: If-None-Match, If-Modified-Since");
} else if (isset($cut_etag)) {
header("Vary: If-None-Match");
} else if (isset($cut_time)) {
header("Vary: If-Modified-Since");
}
$etag = @join("-",$etags);
if (strstr($hinm, $etag)) {
txp_status_header('304 Not Modified');
exit(0);
}
if ($cutarticles) {
//header("HTTP/1.1 226 IM Used");
//This should be used as opposed to 200, but Apache doesn't like it.
//http://intertwingly.net/blog/2004/09/11/Vary-ETag/ says that the status code should be 200.
header("Cache-Control: no-store, im");
header("IM: feed");
}
}
$out = array_merge($out, $articles);
header("Content-Type: application/rss+xml; charset=utf-8");
if (isset($etag)) header('ETag: "'.$etag.'"');
return
'<?xml version="1.0" encoding="utf-8"?>'.n.
'<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom">'.n.
tag(join(n,$out),'channel').n.
'</rss>';
}
// DEPRECATED FUNCTIONS
// included for backwards compatibility with older plugins only
function rss_safe_hed($toUnicode) {
if (version_compare(phpversion(), "5.0.0", ">=")) {
$str = html_entity_decode($toUnicode, ENT_QUOTES, "UTF-8");
} else {
$trans_tbl = get_html_translation_table(HTML_ENTITIES);
foreach($trans_tbl as $k => $v) {
$ttr[$v] = utf8_encode($k);
}
$str = strtr($toUnicode, $ttr);
}
return $str;
}
?>