Extension:DatabaseFetchHook.php
<?php
- Extension:DatabaseFetchObjectTemplate:Php
- - See http://www.mediawiki.org/wiki/Extension:DatabaseFetchObject for installation and usage details
- - Started: 2007-03-05
- - Licenced under LGPL (http://www.gnu.org/copyleft/lesser.html)
if (!defined('MEDIAWIKI')) die('Not an entry point.');
define('DFO_VERSION','1.0.2, 2007-05-19');
$wgExtensionCredits['parserhook'][] = array( 'name' => "DatabaseFetchObject", 'author' => 'User:Nad', 'description' => 'Dynamically adds a new hook to intercept database row requests', 'url' => 'http://www.mediawiki.org/wiki/Extension:DatabaseFetchObject', 'version' => DFO_VERSION );
- Create a new secureLoadBalancer class by extending the existing one
$LoadBalancer = get_class($wgLoadBalancer); $secureLoadBalancer = "secure$LoadBalancer"; eval('class '.$secureLoadBalancer.' extends '.$LoadBalancer.' {
# Override the getConnection method to return a secureDatabase connection function &getConnection($i, $fail = true, $groups = array()) { $db =& parent::getConnection($i,$fail,$groups);
# Create a secure subclass of the database class with extended fetchObject method $dbClass = get_class($db); $dbSecure = "secure$dbClass"; if (!class_exists($dbSecure)) { eval(\'class \'.$dbSecure.\' extends \'.$dbClass.\' { function fetchObject($res) { $row = parent::fetchObject($res); wfRunHooks("DatabaseFetchObject", array(&$this,&$row)); return $row; } }\'); }
# Replace the DatabaseXXX connection with an identical secureDatabaseXXX connection $sdb = new $dbSecure; foreach(array_keys(get_class_vars($dbClass)) as $k) $sdb->$k = $db->$k; unset($db);
return $sdb; }
}');
- Replace the global LoadBalancer object with an identical secureLoadBalancer
$oldLoadBalancer = $wgLoadBalancer; $wgLoadBalancer = new $secureLoadBalancer($oldLoadBalancer->mServers); foreach(array_keys(get_class_vars($LoadBalancer)) as $k) $wgLoadBalancer->$k = $oldLoadBalancer->$k;
- Test the hook
$wgHooks['DatabaseFetchObject'][] = 'hookDatabaseFetchObject'; function hookDatabaseFetchObject(&$row) { if (is_object($row)) msg(join(',',array_keys(get_object_vars($row)))); return true; } ?>