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   1  <?php
   2  /**

   3    * BLOG:CMS: PHP/MySQL Personal Content Management System (CMS)

   4    * http://blogcms.com/

   5    * ----------------------------------------------------------------

   6    *

   7    * Copyright (C) 2003-2005 Radek HULÁN

   8    * http://hulan.cz/contact/

   9    *

  10    * Based on: 

  11    * ----------------------------------------------------------------

  12    * Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/) 

  13    * Copyright (C) 2002-2003 The Nucleus Group

  14    *

  15    * ----------------------------------------------------------------

  16    * This program is free software; you can redistribute it and/or

  17    * modify it under the terms of the GNU General Public License

  18    * as published by the Free Software Foundation; either version 2

  19    * of the License, or (at your option) any later version.

  20  **/
  21  
  22  header("Pragma: no-cache");
  23  $CONF = array();
  24  include('cfg.php');
  25  if (!$CONF['DisableSite']) {
  26      // get feed into $feed

  27      ob_start();
  28      selectSkin('xmlrss2');
  29      selector();
  30      $feed = ob_get_contents();
  31      ob_end_clean();
  32      
  33      // create ETAG (hash of feed)

  34      // (HTTP_IF_NONE_MATCH has quotes around it)

  35      $eTag = '"'.md5($feed).'"';
  36      header('Etag: '.$eTag);
  37      
  38      // compare Etag to what we got

  39      if ($eTag == serverVar('HTTP_IF_NONE_MATCH')) {    
  40          header("HTTP/1.0 304 Not Modified");
  41          header('Content-Length: 0');
  42      } else {
  43          // dump feed

  44          echo $feed;
  45      }
  46          
  47  } else {
  48      echo '<' . '?xml version="1.0" encoding="utf-8"?' . '>';
  49  ?>
  50      <rss version="2.0">
  51        <channel>
  52          <title><?php echo htmlspecialchars($CONF['SiteName'])?></title>
  53          <link><?php echo htmlspecialchars($CONF['IndexURL'])?></link>
  54          <description></description>
  55          <docs>http://backend.userland.com/rss</docs>
  56         </channel>
  57      </rss>    
  58  <?php 
  59   }
  60  ?>