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   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  use dokuwiki\Search\FulltextSearch;
  21  
  22  if (!defined('DOKU_INC')) define('DOKU_INC', __DIR__ . '/');
  23  require_once (DOKU_INC . 'inc/init.php');
  24  
  25  //close session
  26  session_write_close();
  27  
  28  //feed disabled?
  29  if (!actionOK('rss')) {
  30      http_status(404);
  31      echo '<error>RSS feed is disabled.</error>';
  32      exit;
  33  }
  34  
  35  $options = new FeedCreatorOptions();
  36  
  37  // we only cache the recent cache, but do so based on dynamic parameters
  38  // other modes are never cached and always created on the fly
  39  $cache = null;
  40  $cacheKey = $options->getCacheKey([
  41      $INPUT->server->str('REMOTE_USER'),
  42      $INPUT->server->str('HTTP_HOST'),
  43      $INPUT->server->str('SERVER_PORT'),
  44  ]);
  45  if ($cacheKey !== null) {
  46      $cache = new Cache($cacheKey, '.feed');
  47  
  48      // prepare cache depends
  49      $depends['files'] = getConfigFiles('main');
  50      $depends['age'] = $conf['rss_update'];
  51      $depends['purge'] = $INPUT->bool('purge');
  52  }
  53  
  54  // check cacheage and deliver if nothing has changed since last
  55  // time or the update interval has not passed, also handles conditional requests
  56  header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
  57  header('Pragma: public');
  58  header('Content-Type: ' . $options->getMimeType());
  59  header('X-Robots-Tag: noindex');
  60  if ($cache?->useCache($depends)) {
  61      http_conditionalRequest($cache->getTime());
  62      if ($conf['allowdebug']) header("X-CacheUsed: $cache->cache");
  63      echo $cache->retrieveCache();
  64      exit;
  65  } else {
  66      http_conditionalRequest(time());
  67  }
  68  
  69  // create new feed
  70  try {
  71      $feed = (new FeedCreator($options))->build();
  72      $cache?->storeCache($feed);
  73      echo $feed;
  74  } catch (Exception $e) {
  75      http_status(500);
  76      echo '<error>' . hsc($e->getMessage()) . '</error>';
  77      exit;
  78  }