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<?php
/**
* @author Arthur Schiwon <blizzz@owncloud.com>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Cache;
class FileGlobal {
static protected function getCacheDir() {
$cache_dir = get_temp_dir().'/owncloud-' . \OC_Util::getInstanceId().'/';
if (!is_dir($cache_dir)) {
mkdir($cache_dir);
}
return $cache_dir;
}
protected function fixKey($key) {
return str_replace('/', '_', $key);
}
/**
* @param string $key
*/
public function get($key) {
$key = $this->fixKey($key);
if ($this->hasKey($key)) {
$cache_dir = self::getCacheDir();
return file_get_contents($cache_dir.$key);
}
return null;
}
/**
* @param string $key
* @param string $value
*/
public function set($key, $value, $ttl=0) {
$key = $this->fixKey($key);
$cache_dir = self::getCacheDir();
if ($cache_dir and file_put_contents($cache_dir.$key, $value)) {
if ($ttl === 0) {
$ttl = 86400; // 60*60*24
}
return touch($cache_dir.$key, time() + $ttl);
}
return false;
}
public function hasKey($key) {
$key = $this->fixKey($key);
$cache_dir = self::getCacheDir();
if ($cache_dir && is_file($cache_dir.$key) && is_readable($cache_dir.$key)) {
$mtime = filemtime($cache_dir.$key);
if ($mtime < time()) {
unlink($cache_dir.$key);
return false;
}
return true;
}
return false;
}
public function remove($key) {
$cache_dir = self::getCacheDir();
if(!$cache_dir) {
return false;
}
$key = $this->fixKey($key);
return unlink($cache_dir.$key);
}
public function clear($prefix='') {
$cache_dir = self::getCacheDir();
$prefix = $this->fixKey($prefix);
if($cache_dir and is_dir($cache_dir)) {
$dh=opendir($cache_dir);
if(is_resource($dh)) {
while (($file = readdir($dh)) !== false) {
if($file!='.' and $file!='..' and ($prefix==='' || strpos($file, $prefix) === 0)) {
unlink($cache_dir.$file);
}
}
}
}
}
static public function gc() {
$appConfig = \OC::$server->getAppConfig();
$last_run = $appConfig->getValue('core', 'global_cache_gc_lastrun', 0);
$now = time();
if (($now - $last_run) < 300) {
// only do cleanup every 5 minutes
return;
}
$appConfig->setValue('core', 'global_cache_gc_lastrun', $now);
$cache_dir = self::getCacheDir();
if($cache_dir and is_dir($cache_dir)) {
$dh=opendir($cache_dir);
if(is_resource($dh)) {
while (($file = readdir($dh)) !== false) {
if($file!='.' and $file!='..') {
$mtime = filemtime($cache_dir.$file);
if ($mtime < $now) {
unlink($cache_dir.$file);
}
}
}
}
}
}
}
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