Redirecting the old links

To make catch the URLs and redirect them to the new content, a module can be made. How simple this is depends on the old url structure, in this case it's only links starting modules/ and uploads/. Although some of the links under modules were complicated to say the least - so lots of code chopped from the example.

/**
 * Implementation of hook_menu.
 */
function nabuur_xoops_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'uploads',
      'callback' => 'nabuur_xoops_file',
      'access' => true,
      'type' => MENU_CALLBACK,
    );

    $items[] = array(
      'path' => 'modules',
      'callback' => 'nabuur_xoops_page',
      'access' => true,
      'type' => MENU_CALLBACK,
    );
  }
  return $items;
}

/**
 * Redirects uploads/ links by checking against stored filepath.
 */
function nabuur_xoops_file() {
  global $base_url;
  $xf_path = $_GET['q'];
  if(preg_match('@[^ a-zA-Z0-9_\-\.\(\)/]@', $xf_path)) {
    // character not in known filenames
    drupal_not_found();
  }
  else {
    if ($df_path = db_result(db_query("SELECT {filepath} FROM {xoops_files} x LEFT JOIN files f ON x.fid = f.fid WHERE file = '%s'", $xf_path))) {
      // log
      nabuur_xoops_goto($base_url .'/'. $df_path); // @todo
    }
    elseif ($df_path = file_create_path($xf_filepath)) {
       nabuur_xoops_goto($base_url .'/'. $df_path);
    }
    else {
      return drupal_not_found();
    }
  }
}


/**
 * Redirects modules/ to new node/nid.
 */
function nabuur_xoops_page() {
  if (isset($_GET['topic_id'])) {
    // task (including links direct to posts in tasks)
    if ($nid = db_result(db_query("SELECT nid FROM {xoops_content} WHERE xtable = 'xoops_bb_topics' AND xid = %d", $_GET['topic_id']))) {
      nabuur_xoops_goto('node/'. $nid);
    }
  }
[......]
}

function nabuur_xoops_goto($path) {
  drupal_goto($path, NULL, NULL, 301);
}

By ekes submitted on 19 Jul 2008 last updated 19 Jul 2008