feed.php

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