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feed.php
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feed.php
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<?php
/**
* XML feed export
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Andreas Gohr <andi@splitbrain.org>
*
* @global array $conf
* @global Input $INPUT
*/
if(!defined('DOKU_INC')) define('DOKU_INC', dirname(__FILE__).'/');
require_once(DOKU_INC.'inc/init.php');
//close session
session_write_close();
//feed disabled?
if(!actionOK('rss')) {
http_status(404);
echo '<error>RSS feed is disabled.</error>';
exit;
}
// get params
$opt = rss_parseOptions();
// the feed is dynamic - we need a cache for each combo
// (but most people just use the default feed so it's still effective)
$key = join('', array_values($opt)).'$'.$_SERVER['REMOTE_USER'].'$'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'];
$cache = new cache($key, '.feed');
// prepare cache depends
$depends['files'] = getConfigFiles('main');
$depends['age'] = $conf['rss_update'];
$depends['purge'] = $INPUT->bool('purge');
// check cacheage and deliver if nothing has changed since last
// time or the update interval has not passed, also handles conditional requests
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Type: application/xml; charset=utf-8');
header('X-Robots-Tag: noindex');
if($cache->useCache($depends)) {
http_conditionalRequest($cache->_time);
if($conf['allowdebug']) header("X-CacheUsed: $cache->cache");
print $cache->retrieveCache();
exit;
} else {
http_conditionalRequest(time());
}
// create new feed
$rss = new UniversalFeedCreator();
$rss->title = $conf['title'].(($opt['namespace']) ? ' '.$opt['namespace'] : '');
$rss->link = DOKU_URL;
$rss->syndicationURL = DOKU_URL.'feed.php';
$rss->cssStyleSheet = DOKU_URL.'lib/exe/css.php?s=feed';
$image = new FeedImage();
$image->title = $conf['title'];
$image->url = tpl_getMediaFile(array(':wiki:favicon.ico', ':favicon.ico', 'images/favicon.ico'), true);
$image->link = DOKU_URL;
$rss->image = $image;
$data = null;
$modes = array(
'list' => 'rssListNamespace',
'search' => 'rssSearch',
'recent' => 'rssRecentChanges'
);
if(isset($modes[$opt['feed_mode']])) {
$data = $modes[$opt['feed_mode']]($opt);
} else {
$eventData = array(
'opt' => &$opt,
'data' => &$data,
);
$event = new Doku_Event('FEED_MODE_UNKNOWN', $eventData);
if($event->advise_before(true)) {
echo sprintf('<error>Unknown feed mode %s</error>', hsc($opt['feed_mode']));
exit;
}
$event->advise_after();
}
rss_buildItems($rss, $data, $opt);
$feed = $rss->createFeed($opt['feed_type']);
// save cachefile
$cache->storeCache($feed);
// finally deliver
print $feed;
// ---------------------------------------------------------------- //
/**
* Get URL parameters and config options and return an initialized option array
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function rss_parseOptions() {
global $conf;
global $INPUT;
$opt = array();
foreach(array(
// Basic feed properties
// Plugins may probably want to add new values to these
// properties for implementing own feeds
// One of: list, search, recent
'feed_mode' => array('str', 'mode', 'recent'),
// One of: diff, page, rev, current
'link_to' => array('str', 'linkto', $conf['rss_linkto']),
// One of: abstract, diff, htmldiff, html
'item_content' => array('str', 'content', $conf['rss_content']),
// Special feed properties
// These are only used by certain feed_modes
// String, used for feed title, in list and rc mode
'namespace' => array('str', 'ns', null),
// Positive integer, only used in rc mode
'items' => array('int', 'num', $conf['recent']),
// Boolean, only used in rc mode
'show_minor' => array('bool', 'minor', false),
// String, only used in list mode
'sort' => array('str', 'sort', 'natural'),
// String, only used in search mode
'search_query' => array('str', 'q', null),
// One of: pages, media, both
'content_type' => array('str', 'view', $conf['rss_media'])
) as $name => $val) {
$opt[$name] = $INPUT->{$val[0]}($val[1], $val[2], true);
}
$opt['items'] = max(0, (int) $opt['items']);
$opt['show_minor'] = (bool) $opt['show_minor'];
$opt['sort'] = valid_input_set('sort', array('default' => 'natural', 'date'), $opt);
$opt['guardmail'] = ($conf['mailguard'] != '' && $conf['mailguard'] != 'none');
$type = $INPUT->valid(
'type',
array( 'rss', 'rss2', 'atom', 'atom1', 'rss1'),
$conf['rss_type']
);
switch($type) {
case 'rss':
$opt['feed_type'] = 'RSS0.91';
$opt['mime_type'] = 'text/xml';
break;
case 'rss2':
$opt['feed_type'] = 'RSS2.0';
$opt['mime_type'] = 'text/xml';
break;
case 'atom':
$opt['feed_type'] = 'ATOM0.3';
$opt['mime_type'] = 'application/xml';
break;
case 'atom1':
$opt['feed_type'] = 'ATOM1.0';
$opt['mime_type'] = 'application/atom+xml';
break;
default:
$opt['feed_type'] = 'RSS1.0';
$opt['mime_type'] = 'application/xml';
}
$eventData = array(
'opt' => &$opt,
);
trigger_event('FEED_OPTS_POSTPROCESS', $eventData);
return $opt;
}
/**
* Add recent changed pages to a feed object
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param FeedCreator $rss the FeedCreator Object
* @param array $data the items to add
* @param array $opt the feed options
*/
function rss_buildItems(&$rss, &$data, $opt) {
global $conf;
global $lang;
/* @var DokuWiki_Auth_Plugin $auth */
global $auth;
$eventData = array(
'rss' => &$rss,
'data' => &$data,
'opt' => &$opt,
);
$event = new Doku_Event('FEED_DATA_PROCESS', $eventData);
if($event->advise_before(false)) {
foreach($data as $ditem) {
if(!is_array($ditem)) {
// not an array? then only a list of IDs was given
$ditem = array('id' => $ditem);
}
$item = new FeedItem();
$id = $ditem['id'];
if(!$ditem['media']) {
$meta = p_get_metadata($id);
} else {
$meta = array();
}
// add date
if($ditem['date']) {
$date = $ditem['date'];
} elseif ($ditem['media']) {
$date = @filemtime(mediaFN($id));
} elseif (file_exists(wikiFN($id))) {
$date = @filemtime(wikiFN($id));
} elseif($meta['date']['modified']) {
$date = $meta['date']['modified'];
} else {
$date = 0;
}
if($date) $item->date = date('r', $date);
// add title
if($conf['useheading'] && $meta['title']) {
$item->title = $meta['title'];
} else {
$item->title = $ditem['id'];
}
if($conf['rss_show_summary'] && !empty($ditem['sum'])) {
$item->title .= ' - '.strip_tags($ditem['sum']);
}
// add item link
switch($opt['link_to']) {
case 'page':
if($ditem['media']) {
$item->link = media_managerURL(
array(
'image' => $id,
'ns' => getNS($id),
'rev' => $date
), '&', true
);
} else {
$item->link = wl($id, 'rev='.$date, true, '&');
}
break;
case 'rev':
if($ditem['media']) {
$item->link = media_managerURL(
array(
'image' => $id,
'ns' => getNS($id),
'rev' => $date,
'tab_details' => 'history'
), '&', true
);
} else {
$item->link = wl($id, 'do=revisions&rev='.$date, true, '&');
}
break;
case 'current':
if($ditem['media']) {
$item->link = media_managerURL(
array(
'image' => $id,
'ns' => getNS($id)
), '&', true
);
} else {
$item->link = wl($id, '', true, '&');
}
break;
case 'diff':
default:
if($ditem['media']) {
$item->link = media_managerURL(
array(
'image' => $id,
'ns' => getNS($id),
'rev' => $date,
'tab_details' => 'history',
'mediado' => 'diff'
), '&', true
);
} else {
$item->link = wl($id, 'rev='.$date.'&do=diff', true, '&');
}
}
// add item content
switch($opt['item_content']) {
case 'diff':
case 'htmldiff':
if($ditem['media']) {
$medialog = new MediaChangeLog($id);
$revs = $medialog->getRevisions(0, 1);
$rev = $revs[0];
$src_r = '';
$src_l = '';
if($size = media_image_preview_size($id, '', new JpegMeta(mediaFN($id)), 300)) {
$more = 'w='.$size[0].'&h='.$size[1].'&t='.@filemtime(mediaFN($id));
$src_r = ml($id, $more, true, '&', true);
}
if($rev && $size = media_image_preview_size($id, $rev, new JpegMeta(mediaFN($id, $rev)), 300)) {
$more = 'rev='.$rev.'&w='.$size[0].'&h='.$size[1];
$src_l = ml($id, $more, true, '&', true);
}
$content = '';
if($src_r) {
$content = '<table>';
$content .= '<tr><th width="50%">'.$rev.'</th>';
$content .= '<th width="50%">'.$lang['current'].'</th></tr>';
$content .= '<tr align="center"><td><img src="'.$src_l.'" alt="" /></td><td>';
$content .= '<img src="'.$src_r.'" alt="'.$id.'" /></td></tr>';
$content .= '</table>';
}
} else {
require_once(DOKU_INC.'inc/DifferenceEngine.php');
$pagelog = new PageChangeLog($id);
$revs = $pagelog->getRevisions(0, 1);
$rev = $revs[0];
if($rev) {
$df = new Diff(explode("\n", rawWiki($id, $rev)),
explode("\n", rawWiki($id, '')));
} else {
$df = new Diff(array(''),
explode("\n", rawWiki($id, '')));
}
if($opt['item_content'] == 'htmldiff') {
// note: no need to escape diff output, TableDiffFormatter provides 'safe' html
$tdf = new TableDiffFormatter();
$content = '<table>';
$content .= '<tr><th colspan="2" width="50%">'.$rev.'</th>';
$content .= '<th colspan="2" width="50%">'.$lang['current'].'</th></tr>';
$content .= $tdf->format($df);
$content .= '</table>';
} else {
// note: diff output must be escaped, UnifiedDiffFormatter provides plain text
$udf = new UnifiedDiffFormatter();
$content = "<pre>\n".hsc($udf->format($df))."\n</pre>";
}
}
break;
case 'html':
if($ditem['media']) {
if($size = media_image_preview_size($id, '', new JpegMeta(mediaFN($id)))) {
$more = 'w='.$size[0].'&h='.$size[1].'&t='.@filemtime(mediaFN($id));
$src = ml($id, $more, true, '&', true);
$content = '<img src="'.$src.'" alt="'.$id.'" />';
} else {
$content = '';
}
} else {
if (@filemtime(wikiFN($id)) === $date) {
$content = p_wiki_xhtml($id, '', false);
} else {
$content = p_wiki_xhtml($id, $date, false);
}
// no TOC in feeds
$content = preg_replace('/(<!-- TOC START -->).*(<!-- TOC END -->)/s', '', $content);
// add alignment for images
$content = preg_replace('/(<img .*?class="medialeft")/s', '\\1 align="left"', $content);
$content = preg_replace('/(<img .*?class="mediaright")/s', '\\1 align="right"', $content);
// make URLs work when canonical is not set, regexp instead of rerendering!
if(!$conf['canonical']) {
$base = preg_quote(DOKU_REL, '/');
$content = preg_replace('/(<a href|<img src)="('.$base.')/s', '$1="'.DOKU_URL, $content);
}
}
break;
case 'abstract':
default:
if($ditem['media']) {
if($size = media_image_preview_size($id, '', new JpegMeta(mediaFN($id)))) {
$more = 'w='.$size[0].'&h='.$size[1].'&t='.@filemtime(mediaFN($id));
$src = ml($id, $more, true, '&', true);
$content = '<img src="'.$src.'" alt="'.$id.'" />';
} else {
$content = '';
}
} else {
$content = $meta['description']['abstract'];
}
}
$item->description = $content; //FIXME a plugin hook here could be senseful
// add user
# FIXME should the user be pulled from metadata as well?
$user = @$ditem['user']; // the @ spares time repeating lookup
if(blank($user)) {
$item->author = 'Anonymous';
$item->authorEmail = 'anonymous@undisclosed.example.com';
} else {
$item->author = $user;
$item->authorEmail = $user . '@undisclosed.example.com';
// get real user name if configured
if($conf['useacl'] && $auth) {
$userInfo = $auth->getUserData($user);
if($userInfo) {
switch($conf['showuseras']) {
case 'username':
case 'username_link':
$item->author = $userInfo['name'];
break;
default:
$item->author = $user;
break;
}
} else {
$item->author = $user;
}
}
}
// add category
if(isset($meta['subject'])) {
$item->category = $meta['subject'];
} else {
$cat = getNS($id);
if($cat) $item->category = $cat;
}
// finally add the item to the feed object, after handing it to registered plugins
$evdata = array(
'item' => &$item,
'opt' => &$opt,
'ditem' => &$ditem,
'rss' => &$rss
);
$evt = new Doku_Event('FEED_ITEM_ADD', $evdata);
if($evt->advise_before()) {
$rss->addItem($item);
}
$evt->advise_after(); // for completeness
}
}
$event->advise_after();
}
/**
* Add recent changed pages to the feed object
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function rssRecentChanges($opt) {
global $conf;
$flags = RECENTS_SKIP_DELETED;
if(!$opt['show_minor']) $flags += RECENTS_SKIP_MINORS;
if($opt['content_type'] == 'media' && $conf['mediarevisions']) $flags += RECENTS_MEDIA_CHANGES;
if($opt['content_type'] == 'both' && $conf['mediarevisions']) $flags += RECENTS_MEDIA_PAGES_MIXED;
$recents = getRecents(0, $opt['items'], $opt['namespace'], $flags);
return $recents;
}
/**
* Add all pages of a namespace to the feed object
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function rssListNamespace($opt) {
require_once(DOKU_INC.'inc/search.php');
global $conf;
$ns = ':'.cleanID($opt['namespace']);
$ns = utf8_encodeFN(str_replace(':', '/', $ns));
$data = array();
$search_opts = array(
'depth' => 1,
'pagesonly' => true,
'listfiles' => true
);
search($data, $conf['datadir'], 'search_universal', $search_opts, $ns, $lvl = 1, $opt['sort']);
return $data;
}
/**
* Add the result of a full text search to the feed object
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function rssSearch($opt) {
if(!$opt['search_query']) return array();
require_once(DOKU_INC.'inc/fulltext.php');
$data = ft_pageSearch($opt['search_query'], $poswords);
$data = array_keys($data);
return $data;
}
//Setup VIM: ex: et ts=4 :