mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-12-15 19:20:47 +01:00
149 lines
4.0 KiB
PHP
149 lines
4.0 KiB
PHP
<?php
|
|
/**
|
|
* eGroupWare API: Caching provider storing data to files
|
|
*
|
|
* @link http://www.egroupware.org
|
|
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
|
|
* @package api
|
|
* @subpackage cache
|
|
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
* @copyright (c) 2009 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
* @version $Id$
|
|
*/
|
|
|
|
/**
|
|
* Caching provider storing data in files
|
|
*
|
|
* The provider creates subdirs under a given path
|
|
* for each values in $key
|
|
*/
|
|
class egw_cache_files implements egw_cache_provider
|
|
{
|
|
/**
|
|
* Extension of file used to store expiration > 0
|
|
*/
|
|
const EXPIRATION_EXTENSION = '.expiration';
|
|
|
|
/**
|
|
* Path of base-directory for the cache, set via parameter to the constructor or defaults to temp_dir
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $base_path;
|
|
|
|
/**
|
|
* Constructor, eg. opens the connection to the backend
|
|
*
|
|
* @throws Exception if connection to backend could not be established
|
|
* @param array $params eg. array(host,port) or array(directory) depending on the provider
|
|
*/
|
|
function __construct(array $params)
|
|
{
|
|
if ($params)
|
|
{
|
|
$this->base_path = $params[0];
|
|
}
|
|
else
|
|
{
|
|
if(!isset($GLOBALS['egw_info']['server']['temp_dir']))
|
|
{
|
|
if (isset($GLOBALS['egw_setup']) && isset($GLOBALS['egw_setup']->db))
|
|
{
|
|
$GLOBALS['egw_info']['server']['temp_dir'] = $GLOBALS['egw_setup']->db->select(config::TABLE,'config_value',array(
|
|
'config_app' => 'phpgwapi',
|
|
'config_name' => 'temp_dir',
|
|
),__LINE__,__FILE__)->fetchColumn();
|
|
}
|
|
if (!$GLOBALS['egw_info']['server']['temp_dir'])
|
|
{
|
|
throw new Exception (__METHOD__."() server/temp_dir is NOT set!");
|
|
}
|
|
}
|
|
$this->base_path = $GLOBALS['egw_info']['server']['temp_dir'].'/egw_cache';
|
|
}
|
|
if (!isset($this->base_path) || !file_exists($this->base_path) && !mkdir($this->base_path,0700,true))
|
|
{
|
|
throw new Exception (__METHOD__."() can't create basepath $this->base_path!");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stores some data in the cache
|
|
*
|
|
* @param array $keys eg. array($level,$app,$location)
|
|
* @param mixed $data
|
|
* @param int $expiration=0
|
|
* @return boolean true on success, false on error
|
|
*/
|
|
function set(array $keys,$data,$expiration=0)
|
|
{
|
|
if ($ret = file_put_contents($fname=$this->filename($keys,true),serialize($data),LOCK_EX) > 0)
|
|
{
|
|
if ((int)$expiration > 0) file_put_contents($fname.self::EXPIRATION_EXTENSION,(string)$expiration);
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Get some data from the cache
|
|
*
|
|
* @param array $keys eg. array($level,$app,$location)
|
|
* @return mixed data stored or NULL if not found in cache
|
|
*/
|
|
function get(array $keys)
|
|
{
|
|
if (!file_exists($fname = $this->filename($keys)))
|
|
{
|
|
return null;
|
|
}
|
|
if (file_exists($fname_expiration=$fname.self::EXPIRATION_EXTENSION) &&
|
|
($expiration = (int)file_get_contents($fname_expiration)) &&
|
|
filemtime($fname) < time()-$expiration)
|
|
{
|
|
unlink($fname);
|
|
unlink($fname_expiration);
|
|
return null;
|
|
}
|
|
return unserialize(file_get_contents($fname));
|
|
}
|
|
|
|
/**
|
|
* Delete some data from the cache
|
|
*
|
|
* @param array $keys eg. array($level,$app,$location)
|
|
* @return boolean true on success, false on error (eg. $key not set)
|
|
*/
|
|
function delete(array $keys)
|
|
{
|
|
if (!file_exists($fname = $this->filename($keys)))
|
|
{
|
|
//error_log(__METHOD__.'('.array2string($keys).") file_exists('$fname') == FALSE!");
|
|
return false;
|
|
}
|
|
if (file_exists($$fname_expiration=$fname.self::EXPIRATION_EXTENSION))
|
|
{
|
|
unlink($fname_expiration);
|
|
}
|
|
//error_log(__METHOD__.'('.array2string($keys).") calling unlink('$fname')");
|
|
return unlink($fname);
|
|
}
|
|
|
|
/**
|
|
* Create a path from $keys and $basepath
|
|
*
|
|
* @param array $keys
|
|
* @param boolean $mkdir=false should we create the directory
|
|
* @return string
|
|
*/
|
|
private function filename(array $keys,$mkdir=false)
|
|
{
|
|
$fname = $this->base_path.'/'.str_replace(':','-',implode('/',$keys));
|
|
|
|
if ($mkdir && !file_exists($dirname=dirname($fname)))
|
|
{
|
|
mkdir($dirname,0700,true);
|
|
}
|
|
return $fname;
|
|
}
|
|
}
|