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<?php
/**
* @package Joomla.Plugin
* @subpackage System.redirect
*
* @copyright Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('JPATH_BASE') or die;
/**
* Plugin class for redirect handling.
*
* @package Joomla.Plugin
* @subpackage System.redirect
* @since 1.6
*/
class PlgSystemRedirect extends JPlugin
{
/**
* Constructor.
*
* @param object &$subject The object to observe
* @param array $config An optional associative array of configuration settings.
*
* @since 1.6
*/
public function __construct(&$subject, $config)
{
parent::__construct($subject, $config);
// Set the error handler for E_ERROR to be the class handleError method.
JError::setErrorHandling(E_ERROR, 'callback', array('PlgSystemRedirect', 'handleError'));
set_exception_handler(array('PlgSystemRedirect', 'handleError'));
}
/**
* Method to handle an error condition.
*
* @param Exception &$error The Exception object to be handled.
*
* @return void
*
* @since 1.6
*/
public static function handleError(&$error)
{
// Get the application object.
$app = JFactory::getApplication();
// Make sure the error is a 404 and we are not in the administrator.
if (!$app->isAdmin() and ($error->getCode() == 404))
{
// Get the full current URI.
$uri = JUri::getInstance();
$current = rawurldecode($uri->toString(array('scheme', 'host', 'port', 'path', 'query', 'fragment')));
// Attempt to ignore idiots.
if ((strpos($current, 'mosConfig_') !== false) || (strpos($current, '=http://') !== false))
{
// Render the error page.
JError::customErrorPage($error);
}
// See if the current url exists in the database as a redirect.
$db = JFactory::getDbo();
$query = $db->getQuery(true)
->select($db->quoteName('new_url'))
->select($db->quoteName('published'))
->from($db->quoteName('#__redirect_links'))
->where($db->quoteName('old_url') . ' = ' . $db->quote($current));
$db->setQuery($query, 0, 1);
$link = $db->loadObject();
// If a redirect exists and is published, permanently redirect.
if ($link and ($link->published == 1))
{
$app->redirect($link->new_url, true);
}
else
{
$referer = empty($_SERVER['HTTP_REFERER']) ? '' : $_SERVER['HTTP_REFERER'];
$query = $db->getQuery(true)
->select($db->quoteName('id'))
->from($db->quoteName('#__redirect_links'))
->where($db->quoteName('old_url') . ' = ' . $db->quote($current));
$db->setQuery($query);
$res = $db->loadResult();
if (!$res)
{
// If not, add the new url to the database.
$columns = array(
$db->quoteName('old_url'),
$db->quoteName('new_url'),
$db->quoteName('referer'),
$db->quoteName('comment'),
$db->quoteName('hits'),
$db->quoteName('published'),
$db->quoteName('created_date')
);
$query->clear()
->insert($db->quoteName('#__redirect_links'), false)
->columns($columns)
->values(
$db->quote($current) . ', ' . $db->quote('') .
' ,' . $db->quote($referer) . ', ' . $db->quote('') . ',1,0, ' .
$db->quote(JFactory::getDate()->toSql())
);
$db->setQuery($query);
$db->execute();
}
else
{
// Existing error url, increase hit counter.
$query->clear()
->update($db->quoteName('#__redirect_links'))
->set($db->quoteName('hits') . ' = ' . $db->quoteName('hits') . ' + 1')
->where('id = ' . (int) $res);
$db->setQuery($query);
$db->execute();
}
// Render the error page.
JError::customErrorPage($error);
}
}
else
{
// Render the error page.
JError::customErrorPage($error);
}
}
}