1 <?php
2 
3 /**
4  * XML feed export
5  *
6  * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
7  * @author     Andreas Gohr <andi@splitbrain.org>
8  *
9  * @global array $conf
10  * @global Input $INPUT
11  */
12 
13 use dokuwiki\Feed\FeedCreator;
14 use dokuwiki\Feed\FeedCreatorOptions;
15 use dokuwiki\Cache\Cache;
16 use dokuwiki\ChangeLog\MediaChangeLog;
17 use dokuwiki\ChangeLog\PageChangeLog;
18 use dokuwiki\Extension\AuthPlugin;
19 use dokuwiki\Extension\Event;
20 
21 if (!defined('DOKU_INC')) define('DOKU_INC', __DIR__ . '/');
22 require_once(DOKU_INC . 'inc/init.php');
23 
24 //close session
25 session_write_close();
26 
27 //feed disabled?
28 if (!actionOK('rss')) {
29     http_status(404);
30     echo '<error>RSS feed is disabled.</error>';
31     exit;
32 }
33 
34 $options = new FeedCreatorOptions();
35 
36 // the feed is dynamic - we need a cache for each combo
37 // (but most people just use the default feed so it's still effective)
38 $key = implode('$', [
39     $options->getCacheKey(),
40     $INPUT->server->str('REMOTE_USER'),
41     $INPUT->server->str('HTTP_HOST'),
42     $INPUT->server->str('SERVER_PORT')
43 ]);
44 $cache = new Cache($key, '.feed');
45 
46 // prepare cache depends
47 $depends['files'] = getConfigFiles('main');
48 $depends['age'] = $conf['rss_update'];
49 $depends['purge'] = $INPUT->bool('purge');
50 
51 // check cacheage and deliver if nothing has changed since last
52 // time or the update interval has not passed, also handles conditional requests
53 header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
54 header('Pragma: public');
55 header('Content-Type: ' . $options->getMimeType());
56 header('X-Robots-Tag: noindex');
57 if ($cache->useCache($depends)) {
58     http_conditionalRequest($cache->getTime());
59     if ($conf['allowdebug']) header("X-CacheUsed: $cache->cache");
60     echo $cache->retrieveCache();
61     exit;
62 } else {
63     http_conditionalRequest(time());
64 }
65 
66 // create new feed
67 try {
68     $feed = (new FeedCreator($options))->build();
69     $cache->storeCache($feed);
70     echo $feed;
71 } catch (Exception $e) {
72     http_status(500);
73     echo '<error>' . hsc($e->getMessage()) . '</error>';
74     exit;
75 }
76