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<?php
/**
* @package AkeebaBackup
* @copyright Copyright (c)2006-2010 Nicholas K. Dionysopoulos
* @license GNU General Public License version 3, or later
* @version $Id: update.php 209 2010-08-11 21:43:26Z nikosdion $
* @since 2.2
*/
// Protect from unauthorized access
defined('_JEXEC') or die('Restricted Access');
jimport('joomla.application.component.model');
/**
* The Live Update model
*
*/
class AkeebaModelUpdate extends JModel
{
private $update_url = '';
/**
* Public constructor
* @param unknown_type $config
*/
public function __construct( $config = array() )
{
parent::__construct($config);
// Determine the appropriate update URL based on whether we're on Core or Professional edition
AEPlatform::load_version_defines();
if(AKEEBA_PRO == 1)
{
$this->update_url = 'https://www.akeebabackup.com/updates/abpro.ini';
}
else
{
$this->update_url = 'https://www.akeebabackup.com/updates/abcore.ini';
}
}
/**
* Does the server support URL fopen() wrappers?
* @return bool
*/
private function hasURLfopen()
{
// If we are not allowed to use ini_get, we assume that URL fopen is
// disabled.
if(!function_exists('ini_get'))
return false;
if( !ini_get('allow_url_fopen') )
return false;
return true;
}
/**
* Does the server support the cURL extension?
* @return bool
*/
private function hascURL()
{
if(!function_exists('curl_exec'))
{
return false;
}
return true;
}
/**
* Returns the date and time when the last update check was made.
* @return JDate
*/
private function lastUpdateCheck()
{
// Get a reference to component's parameters
$component =& JComponentHelper::getComponent( 'com_akeeba' );
$params = new JParameter($component->params);
$lastdate = $params->get('lastupdatecheck', '2009-04-02');
jimport('joomla.utilities.date');
$date = new JDate($lastdate);
return $date;
}
/**
* Gets an object with the latest version information, taken from the update.ini data
* @return JObject|bool An object holding the data, or false on failure
*/
private function getLatestVersion($force = false)
{
$inidata = false;
jimport('joomla.utilities.date');
$curdate = new JDate();
$lastdate = $this->lastUpdateCheck();
$difference = ($curdate->toUnix(false) - $lastdate->toUnix(false)) / 3600;
$inidata = $this->getUpdateINIcached();
$cached = false;
// Make sure we ask the server at most every 24 hrs (unless $force is true)
if( ($difference < 24) && (!empty($inidata)) && (!$force) )
{
$cached = true;
// Cached INI data is valid
}
// Prefer to use cURL if it exists and we don't have cached data
elseif( $this->hascURL() )
{
$inidata = $this->getUpdateINIcURL();
}
// If cURL doesn't exist, or if it returned an error, try URL fopen() wrappers
elseif( $this->hasURLfopen() )
{
$inidata = $this->getUpdateINIfopen();
}
// Make sure we do have INI data and not junk...
if($inidata != false)
{
if( strpos($inidata, '; Live Update provision file') !== 0 )
{
$inidata = false;
}
}
// If we have a valid update.ini, update the cache and read the version information
if($inidata != false)
{
if(!$cached) $this->setUpdateINIcached($inidata);
$parsed=AEUtilIni::parse_ini_file($inidata, false, true);
// Determine status by parsing the version
$version = $parsed['version'];
if( preg_match('#^[0-9\.]*a[0-9\.]*#', $version) == 1 )
{
$status = 'alpha';
} elseif( preg_match('#^[0-9\.]*b[0-9\.]*#', $version) == 1 )
{
$status = 'beta';
} elseif( preg_match('#^[0-9\.]*$#', $version) == 1 )
{
$status = 'stable';
} else {
$status = 'svn';
}
// Special processing for the link in Akeeba Backup Professional
$suffix = '';
if(AKEEBA_PRO)
{
$component =& JComponentHelper::getComponent( 'com_akeeba' );
$params = new JParameter($component->params);
$username = $params->get('update_username', '');
$password = $params->get('update_password', '');
if( !empty($username) && !empty($password) )
{
$suffix = '?username='.urlencode($username).'&password='.urlencode($password).'&format=raw';
}
}
$ret = new JObject;
$ret->version = $parsed['version'];
$ret->status = $status;
$ret->reldate = $parsed['date'];
$ret->url = $parsed['link'];
$ret->urlsuffix = $suffix;
return $ret;
}
return false;
}
/**
* Retrieves the update.ini data using URL fopen() wrappers
* @return string|bool The update.ini contents, or FALSE on failure
*/
private function getUpdateINIfopen()
{
return @file_get_contents($this->update_url);
}
/**
* Retrieves the update.ini data using cURL extention calls
* @return string|bool The update.ini contents, or FALSE on failure
*/
private function getUpdateINIcURL()
{
$process = curl_init($this->update_url);
curl_setopt($process, CURLOPT_HEADER, 0);
// Pretend we are IE7, so that webservers play nice with us
curl_setopt($process, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0)');
curl_setopt($process,CURLOPT_ENCODING , 'gzip');
curl_setopt($process, CURLOPT_TIMEOUT, 5);
curl_setopt($process, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($process, CURLOPT_SSL_VERIFYPEER, false);
// The @ sign allows the next line to fail if open_basedir is set or if safe mode is enabled
@curl_setopt($process, CURLOPT_FOLLOWLOCATION, 1);
@curl_setopt($process, CURLOPT_MAXREDIRS, 20);
$inidata = curl_exec($process);
curl_close($process);
return $inidata;
}
private function getUpdateINIcached()
{
$component =& JComponentHelper::getComponent( 'com_akeeba' );
$params = new JParameter($component->params);
$inidata = $params->get('updateini', "");
return json_decode($inidata);
}
/**
* Caches the update.ini contents to database
* @param $inidata string The update.ini data
*/
private function setUpdateINIcached($inidata)
{
$component =& JComponentHelper::getComponent( 'com_akeeba' );
$params = new JParameter($component->params);
jimport('joomla.utilities.date');
$date = new JDate();
$params->set('updateini', json_encode($inidata) );
$params->set('lastupdatecheck', $date->toUnix(false));
$db =& JFactory::getDBO();
$data = $params->toString();
global $mainframe;
if( !is_object($mainframe) )
{
// Joomla! 1.6
$sql = 'UPDATE `#__extensions` SET `params` = '.$db->Quote($data).' WHERE '.
"`element` = 'com_akeeba' AND `type` = 'component'";
}
else
{
// Joomla! 1.5
$sql = 'UPDATE `#__components` SET `params` = '.$db->Quote($data).' WHERE '.
"`option` = 'com_akeeba' AND `parent` = 0 AND `menuid` = 0";
}
$db->setQuery($sql);
$db->query();
}
/**
* Is the Live Update supported on this server?
* @return bool
*/
public function isLiveUpdateSupported()
{
return $this->hasURLfopen() || $this->hascURL();
}
/**
* Searches for updates and returns an object containing update information
* @return JObject An object with members: supported, update_available,
* current_version, current_date, latest_version, latest_date,
* package_url
*/
public function &getUpdates($force = false)
{
jimport('joomla.utilities.date');
$ret = new JObject();
if(!$this->isLiveUpdateSupported())
{
$ret->supported = false;
$ret->update_available = false;
return $ret;
}
else
{
$ret->supported = true;
$update = $this->getLatestVersion($force);
// FIX 2.3: Fail gracefully if the update data couldn't be retrieved
if(!is_object($update) || ($update === false))
{
$ret->supported = false;
$ret->update_available = false;
return $ret;
}
// Check if we need to upgrade, by release date
jimport('joomla.utilities.date');
AEPlatform::load_version_defines();
$curdate = new JDate(AKEEBA_DATE);
$curdate = $curdate->toUnix(false);
$relobject = new JDate($update->reldate);
$reldate = $relobject->toUnix(false);
$ret->latest_date = $relobject->toFormat('%Y-%m-%d');
$version = AKEEBA_VERSION;
if( preg_match('#^[0-9\.]*a[0-9\.]*#', $version) == 1 )
{
$status = 'alpha';
} elseif( preg_match('#^[0-9\.]*b[0-9\.]*#', $version) == 1 )
{
$status = 'beta';
} elseif( preg_match('#^[0-9\.]*$#', $version) == 1 )
{
$status = 'stable';
} else {
$status = 'svn';
}
$ret->update_available = ($reldate > $curdate);
$ret->current_version = AKEEBA_VERSION;
$ret->current_date = AKEEBA_DATE;
$ret->current_status = $status;
$ret->latest_version = $update->version;
$ret->status = $update->status;
$ret->package_url = $update->url;
$ret->package_url_suffix = $update->urlsuffix;
return $ret;
}
}
function downloadPackage($url, $target)
{
if(function_exists('curl_exec'))
{
// By default, try using cURL
$process = curl_init($url);
curl_setopt($process, CURLOPT_HEADER, 0);
// Pretend we are IE7, so that webservers play nice with us
curl_setopt($process, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0)');
curl_setopt($process, CURLOPT_TIMEOUT, 5);
curl_setopt($process, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($process, CURLOPT_SSL_VERIFYPEER, false);
// The @ sign allows the next line to fail if open_basedir is set or if safe mode is enabled
@curl_setopt($process, CURLOPT_FOLLOWLOCATION, 1);
@curl_setopt($process, CURLOPT_MAXREDIRS, 20);
$data = curl_exec($process);
curl_close($process);
if($data !== false)
{
jimport('joomla.filesystem.file');
$result = JFile::write($target, $data);
if($result !== false) {
return basename($target);
} else {
return false;
}
}
else
{
return false;
}
}
else
{
// Use Joomla!'s download helper
jimport('joomla.installer.helper');
return JInstallerHelper::downloadPackage($url, $target);
}
}
}