321 lines
12 KiB
PHP
321 lines
12 KiB
PHP
<?php
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# Copyright (c) 2003-2005, Jannis Hermanns (on behalf the Serendipity Developer Team)
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# All rights reserved. See LICENSE file for licensing details
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header('Content-Type: text/xml; charset=utf-8');
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@define('IN_RSS', true);
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include('serendipity_config.inc.php');
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include(S9Y_INCLUDE_PATH . 'include/functions_rss.inc.php');
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if ($serendipity['cors']) {
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header('Access-Control-Allow-Origin: *'); // Allow RSS feeds to be read by javascript
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}
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$version = $_GET['version'] ?? '';
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$description = $serendipity['blogDescription'];
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$title = $serendipity['blogTitle'];
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$comments = FALSE;
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if (empty($version)) {
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list($version) = serendipity_discover_rss($_GET['file'] ?? null, $_GET['ext'] ?? null);
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} else {
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# be sure it is an allowed version, to prevent attackers sniffing for unrelated files on the file system
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$allowed_versions = ['opml1.0', '0.91', '1.0', '2.0', 'atom0.3', 'atom1.0'];
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if (! in_array($version, $allowed_versions, true)) {
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header('Status: 404 Not Found');
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exit;
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}
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}
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if (isset($_GET['category'])) {
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$serendipity['GET']['category'] = $_GET['category'];
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}
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if (isset($_GET['viewAuthor'])) {
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$serendipity['GET']['viewAuthor'] = $_GET['viewAuthor'];
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}
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if (!isset($_GET['type'])) {
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$_GET['type'] = 'content';
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}
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if (!empty($_SERVER['HTTP_USER_AGENT']) && stristr($_SERVER['HTTP_USER_AGENT'], 'feedburner')) {
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$_GET['nocache'] = true;
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}
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$serendipity['view'] = 'feed';
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switch ($_GET['type']) {
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case 'comments_and_trackbacks':
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case 'trackbacks':
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case 'comments':
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$latest_entry = serendipity_fetchComments(isset($_GET['cid']) ? $_GET['cid'] : null, 1, 'co.id desc', false, $_GET['type']);
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break;
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case 'content':
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default:
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$latest_entry = serendipity_fetchEntries(null, false, 1, false, false, 'last_modified DESC', '', false, true);
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break;
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}
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if (!isset($_GET['nocache'])) {
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/*
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* Caching logic - Do not send feed if nothing has changed
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* Implementation inspired by Simon Willison [http://simon.incutio.com/archive/2003/04/23/conditionalGet], Thiemo Maettig
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*/
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// See if the client has provided the required headers.
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// Always convert the provided header into GMT timezone to allow comparing to the server-side last-modified header
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$modified_since = !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])
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? gmdate('D, d M Y H:i:s \G\M\T', strtotime(stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE'])))
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: false;
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$none_match = !empty($_SERVER['HTTP_IF_NONE_MATCH'])
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? str_replace('"', '', stripslashes($_SERVER['HTTP_IF_NONE_MATCH']))
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: false;
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if (is_array($latest_entry) && isset($latest_entry[0]['last_modified'])) {
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$last_modified = gmdate('D, d M Y H:i:s \G\M\T', serendipity_serverOffsetHour($latest_entry[0]['last_modified'], false));
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$etag = '"' . $last_modified . '"';
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header('Last-Modified: ' . $last_modified);
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header('ETag: ' . $etag);
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if (($none_match == $last_modified && $modified_since == $last_modified) ||
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(!$none_match && $modified_since == $last_modified) ||
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(!$modified_since && $none_match == $last_modified)) {
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header('HTTP/1.0 304 Not Modified');
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header('Status: 304 Not Modified');
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return;
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}
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}
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}
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if (isset($modified_since) &&
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(stristr($_SERVER['HTTP_USER_AGENT'], 'planet') !== FALSE || $serendipity['enforce_RFC2616'])) {
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// People shall get a usual HTTP response according to RFC2616. See serendipity_config.inc.php for details
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$modified_since = FALSE;
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}
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switch ($_GET['type']) {
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case 'comments_and_trackbacks':
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case 'trackbacks':
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case 'comments':
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$entries = serendipity_fetchComments(isset($_GET['cid']) ? $_GET['cid'] : null, (int)$serendipity['RSSfetchLimit'], 'co.id desc', false, $_GET['type']);
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$description = $title . ' - ' . $description;
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if (isset($_GET['cid'])) {
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$title = $title . ' - ' . COMMENTS_FROM . ' "' . $latest_entry[0]['title'] . '"';
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} else {
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$title = $title . ' - ' . COMMENTS;
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}
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$comments = TRUE;
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break;
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case 'content':
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default:
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if (isset($_GET['all']) && $_GET['all']) {
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// Fetch all entries in reverse order for later importing. Fetch sticky entries as normal entries.
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$entries = serendipity_fetchEntries(null, true, '', false, false, 'id ASC', '', false, true);
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} else {
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$entries = serendipity_fetchEntries(null, true, $serendipity['RSSfetchLimit'], false, (isset($modified_since) ? $modified_since : false), 'timestamp DESC', '', false, true);
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}
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break;
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}
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if (isset($serendipity['serendipityRealname'])) {
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$title .= ' (' . LOGIN . ': ' . $serendipity['serendipityRealname'] . ')';
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}
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if (!empty($serendipity['GET']['category'])) {
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$cInfo = serendipity_fetchCategoryInfo((int)$serendipity['GET']['category']);
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$title = serendipity_utf8_encode(serendipity_specialchars($title . ' - '. $cInfo['category_name']));
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} elseif (!empty($serendipity['GET']['viewAuthor'])) {
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list($aInfo) = serendipity_fetchAuthor((int)$serendipity['GET']['viewAuthor']);
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$title = serendipity_utf8_encode(serendipity_specialchars($aInfo['realname'] . ' - '. $title ));
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} else {
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$title = serendipity_utf8_encode(serendipity_specialchars($title));
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}
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$description = serendipity_utf8_encode(serendipity_specialchars($description));
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$metadata = array(
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'title' => $title,
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'description' => $description,
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'language' => $serendipity['lang'],
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'additional_fields' => array(),
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'link' => $serendipity['baseURL'],
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'email' => $serendipity['blogMail'],
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'fullFeed' => false,
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'showMail' => false,
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'version' => $version
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);
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if (serendipity_get_config_var('feedBannerURL') != '') {
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$img = serendipity_get_config_var('feedBannerURL');
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$w = serendipity_get_config_var('feedBannerWidth');
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$h = serendipity_get_config_var('feedBannerHeight');
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} elseif (($banner = serendipity_getTemplateFile('img/rss_banner.png', 'serendipityPath'))) {
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$img = serendipity_getTemplateFile('img/rss_banner.png', 'baseURL');
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$i = getimagesize($banner);
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$w = $i[0];
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$h = $i[1];
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} else {
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$img = serendipity_getTemplateFile('img/s9y_banner_small.png', 'baseURL');
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$w = 100;
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$h = 21;
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}
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$metadata['additional_fields']['image'] = <<<IMAGE
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<image>
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<url>$img</url>
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<title>RSS: $title - $description</title>
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<link>{$serendipity['baseURL']}</link>
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<width>$w</width>
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<height>$h</height>
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</image>
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IMAGE;
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$metadata['additional_fields']['image_atom1.0'] = <<<IMAGE
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<icon>$img</icon>
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IMAGE;
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$metadata['additional_fields']['image_rss1.0_channel'] = '<image rdf:resource="' . $img . '" />';
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$metadata['additional_fields']['image_rss1.0_rdf'] = <<<IMAGE
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<image rdf:about="$img">
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<url>$img</url>
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<title>RSS: $title - $description</title>
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<link>{$serendipity['baseURL']}</link>
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<width>$w</width>
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<height>$h</height>
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</image>
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IMAGE;
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// Now, if set, stitch together any fields that have been configured in the syndication plugin.
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// First, do some sanity checks
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$metadata['additional_fields']['channel'] = '';
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$rssFields = array('feedManagingEditor' => 'managingEditor', 'feedWebmaster' => 'webMaster', 'feedTtl' => 'ttl', 'feedPubDate' => 'pubDate');
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foreach( $rssFields as $configName => $field) {
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$fieldValue = serendipity_get_config_var($configName);
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switch($field) {
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case 'pubDate':
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if (serendipity_db_bool($fieldValue)) {
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$fieldValue = gmdate('D, d M Y H:i:s \G\M\T', $entries[0]['last_modified']);
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} else {
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$fieldValue = '';
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}
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break;
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// Each new RSS-field which needs rewrite of its content should get its own case here.
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default:
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break;
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}
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if ($fieldValue != '') {
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$metadata['additional_fields']['channel'] .= '<' . $field . '>' . $fieldValue . '</' . $field . '>' . "\n";
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}
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}
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if (is_array($metadata['additional_fields'])) {
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// Fix up array keys, because "." are not allowed when wanting to output using Smarty
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foreach($metadata['additional_fields'] AS $_aid => $af) {
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$aid = str_replace('.', '', $_aid);
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$metadata['additional_fields'][$aid] = $af;
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}
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}
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$metadata['fullFeed'] = serendipity_get_config_var('feedFull', false);
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if ($metadata['fullFeed'] === 'client') {
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if ($_GET['fullFeed'] || $serendipity['GET']['fullFeed']) {
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$metadata['fullFeed'] = true;
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} else {
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$metadata['fullFeed'] = false;
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}
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}
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if ($_GET['type'] == 'content' &&
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!isset($_GET['category']) &&
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!isset($serendipity['GET']['tag']) &&
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serendipity_db_bool(serendipity_get_config_var('feedForceCustom', false)) &&
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!preg_match('@FeedBurn@i', $_SERVER['HTTP_USER_AGENT']) && // the hardcoded pass for feedburner is for BC. New services should just use the forceLocal-param
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!isset($_GET['forceLocal'])
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) {
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header('Status: 302 Found');
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header('Location: ' . serendipity_get_config_var('feedCustom'));
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exit;
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}
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$metadata['showMail'] = serendipity_db_bool(serendipity_get_config_var('feedShowMail', $metadata['showMail']));
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$file_version = preg_replace('@[^0-9a-z\.-_]@i', '', $version);
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$metadata['template_file'] = 'feed_' . $file_version . '.tpl';
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serendipity_smarty_init();
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serendipity_plugin_api::hook_event('frontend_rss', $metadata);
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$self_url = ($_SERVER['HTTPS'] == 'on' ? 'https://' : 'http://') . $_SERVER['HTTP_HOST'] . serendipity_specialchars($_SERVER['REQUEST_URI']);
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if (!is_array($entries)) {
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$entries = array();
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}
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if ($entries[0]['last_modified']) {
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$gm_modified = gmdate('Y-m-d\TH:i:s\Z', serendipity_serverOffsetHour($entries[0]['last_modified']));
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} else {
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$gm_modified = gmdate('Y-m-d\TH:i:s\Z', serendipity_serverOffsetHour());
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}
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serendipity_printEntries_rss($entries, $version, $comments, $metadata['fullFeed'], $metadata['showMail']);
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$namespace_hook = 'frontend_display:unknown:namespace';
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$once_display_dat = '';
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switch($version) {
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case 'opml1.0':
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$namespace_hook = 'frontend_display:opml-1.0:namespace';
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break;
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case '0.91':
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$namespace_hook = 'frontend_display:rss-0.91:namespace';
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break;
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case '1.0':
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$namespace_hook = 'frontend_display:rss-1.0:namespace';
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serendipity_plugin_api::hook_event('frontend_display:rss-1.0:once', $entries);
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$once_display_dat = $entries['display_dat'];
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unset($entries['display_dat']);
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break;
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case '2.0':
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$namespace_hook = 'frontend_display:rss-2.0:namespace';
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break;
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case 'atom0.3':
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$namespace_hook = 'frontend_display:atom-0.3:namespace';
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break;
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case 'atom1.0':
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// For people wanting extra RFC compliance
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// header('Content-Type: application/atom+xml; charset=utf-8');
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$namespace_hook = 'frontend_display:atom-1.0:namespace';
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break;
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}
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serendipity_plugin_api::hook_event($namespace_hook, $entries);
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$namespace_display_dat = $entries['display_dat'] ?? null;
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$channel_display_dat = $entries['channel_dat'] ?? null;
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unset($entries['display_dat']);
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unset($entries['channel_dat']);
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$serendipity['smarty']->assignByRef('metadata', $metadata);
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$serendipity['smarty']->assignByRef('entries', $entries);
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$serendipity['smarty']->assignByRef('namespace_display_dat', $namespace_display_dat);
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$serendipity['smarty']->assignByRef('channel_display_dat', $channel_display_dat);
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$serendipity['smarty']->assignByRef('once_display_dat', $once_display_dat);
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$serendipity['smarty']->assign(
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array(
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'is_comments' => $comments,
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'last_modified' => $gm_modified,
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'self_url' => $self_url,
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)
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);
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$serendipity['smarty']->display($metadata['template_file']);
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/* vim: set sts=4 ts=4 expandtab : */
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