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<?php
/**
* Akeeba Engine
* The modular PHP5 site backup engine
* @copyright Copyright (c)2009-2012 Nicholas K. Dionysopoulos
* @license GNU GPL version 3 or, at your option, any later version
* @package akeebaengine
* @version $Id$
*/
// Protection against direct access
defined('AKEEBAENGINE') or die('Restricted access');
/**
* Temporary files management class. Handles creation, tracking and cleanup.
*/
class AEUtilTempfiles
{
/**
* Creates a randomly-named temporary file, registers it with the temporary
* files management and returns its absolute path
* @return string The temporary file name
*/
static function createRegisterTempFile()
{
// Create a randomly named file in the temp directory
$registry =& AEFactory::getConfiguration();
$tempFile = tempnam($registry->get('akeeba.basic.output_directory'),'ak');
// Register it and return its absolute path
$tempName = basename($tempFile);
return AEUtilTempfiles::registerTempFile($tempName);
}
/**
* Registers a temporary file with the Akeeba Engine, storing the list of temporary files
* in another temporary flat database file.
*
* @param string $fileName The path of the file, relative to the temporary directory
* @return string The absolute path to the temporary file, for use in file operations
*/
static function registerTempFile( $fileName )
{
$configuration =& AEFactory::getConfiguration();
$tempFiles = $configuration->get('volatile.tempfiles', false);
if($tempFiles===false)
{
$tempFiles = array();
}
else
{
$tempFiles = @unserialize($tempFiles);
if($tempFiles===false)
{
$tempFiles = array();
}
}
if(!in_array($fileName, $tempFiles))
{
$tempFiles[] = $fileName;
$configuration->set('volatile.tempfiles', serialize($tempFiles));
}
return AEUtilFilesystem::TranslateWinPath($configuration->get('akeeba.basic.output_directory').'/'.$fileName);
}
/**
* Unregister and delete a temporary file
* @param $fileName The filename to unregister and delte
* @param $removePrefix The prefix to remove
*/
static function unregisterAndDeleteTempFile( $fileName, $removePrefix = false )
{
$configuration =& AEFactory::getConfiguration();
if($removePrefix)
{
$fileName = str_replace( AEUtilFilesystem::TranslateWinPath($configuration->get('akeeba.basic.output_directory')) , '', $fileName);
if( (substr($fileName, 0, 1) == '/') || (substr($fileName, 0, 1) == '\\') )
{
$fileName = substr($fileName, 1 );
}
if( (substr($fileName, -1) == '/') || (substr($fileName, -1) == '\\') )
{
$fileName = substr($fileName, 0, -1 );
}
}
// We don't unregister the tempfile here, because on some systems (Windows &
// servers on FastCGI) the files wouldn't get deleted.
$file = $configuration->get('akeeba.basic.output_directory').'/'.$fileName;
AEUtilLogger::WriteLog(_AE_LOG_DEBUG, "-- Removing temporary file $fileName" );
$platform = strtoupper(PHP_OS);
if( (substr($platform,0,6) == 'CYGWIN') || (substr($platform,0,3) == 'WIN') )
{
// On Windows we have to chwon() the file first to make it owned by Nobody
AEUtilLogger::WriteLog(_AE_LOG_DEBUG, "-- Windows hack: chowning $fileName" );
@chown($file, 600);
}
return @self::nullifyAndDelete($file);
}
/**
* Deletes all temporary files
*/
static function deleteTempFiles()
{
$configuration =& AEFactory::getConfiguration();
$tempFiles = $configuration->get('volatile.tempfiles', false);
if($tempFiles === false) {
$tempFiles = array();
} else {
$tempFiles = @unserialize($tempFiles);
}
$fileName = null;
if(!empty($tempFiles)) foreach($tempFiles as $fileName)
{
AEUtilLogger::WriteLog(_AE_LOG_DEBUG, "-- Removing temporary file $fileName" );
$file = $configuration->get('akeeba.basic.output_directory').'/'.$fileName;
$platform = strtoupper(PHP_OS);
if( (substr($platform,0,6) == 'CYGWIN') || (substr($platform,0,3) == 'WIN') )
{
// On Windows we have to chwon() the file first to make it owned by Nobody
@chown($file, 600);
}
$ret = @self::nullifyAndDelete($file);
}
$tempFiles = array();
$configuration->set('volatile.tempfiles', serialize($tempFiles));
}
static function nullifyAndDelete( $filename )
{
// Try to nullify (method #1)
$fp = @fopen($filename, 'w');
if(is_resource($fp)) {
@fclose($fp);
} else {
// Try to nullify (method #2)
@file_put_contents($filename, '');
}
// Unlink
return @unlink($filename);
}
}