186 lines
4.6 KiB
PHP
186 lines
4.6 KiB
PHP
<?php
|
|
/**
|
|
* @author Lukas Reschke <lukas@owncloud.com>
|
|
* @author Morris Jobke <hey@morrisjobke.de>
|
|
* @author Thomas Müller <thomas.mueller@tmit.eu>
|
|
*
|
|
* @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;
|
|
|
|
use OC\Files\Filesystem;
|
|
use OC\Files\View;
|
|
use OCP\Security\ISecureRandom;
|
|
|
|
class File {
|
|
protected $storage;
|
|
|
|
/**
|
|
* Returns the cache storage for the logged in user
|
|
*
|
|
* @return \OC\Files\View cache storage
|
|
* @throws \OC\ForbiddenException
|
|
* @throws \OC\User\NoUserException
|
|
*/
|
|
protected function getStorage() {
|
|
if (isset($this->storage)) {
|
|
return $this->storage;
|
|
}
|
|
if (\OC_User::isLoggedIn()) {
|
|
$rootView = new View();
|
|
$user = \OC::$server->getUserSession()->getUser();
|
|
Filesystem::initMountPoints($user->getUID());
|
|
if (!$rootView->file_exists('/' . $user->getUID() . '/cache')) {
|
|
$rootView->mkdir('/' . $user->getUID() . '/cache');
|
|
}
|
|
$this->storage = new View('/' . $user->getUID() . '/cache');
|
|
return $this->storage;
|
|
} else {
|
|
\OC_Log::write('core', 'Can\'t get cache storage, user not logged in', \OC_Log::ERROR);
|
|
throw new \OC\ForbiddenException('Can\t get cache storage, user not logged in');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $key
|
|
* @return mixed|null
|
|
* @throws \OC\ForbiddenException
|
|
*/
|
|
public function get($key) {
|
|
$result = null;
|
|
if ($this->hasKey($key)) {
|
|
$storage = $this->getStorage();
|
|
$result = $storage->file_get_contents($key);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Returns the size of the stored/cached data
|
|
*
|
|
* @param string $key
|
|
* @return int
|
|
*/
|
|
public function size($key) {
|
|
$result = 0;
|
|
if ($this->hasKey($key)) {
|
|
$storage = $this->getStorage();
|
|
$result = $storage->filesize($key);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @param string $key
|
|
* @param mixed $value
|
|
* @param int $ttl
|
|
* @return bool|mixed
|
|
* @throws \OC\ForbiddenException
|
|
*/
|
|
public function set($key, $value, $ttl = 0) {
|
|
$storage = $this->getStorage();
|
|
$result = false;
|
|
// unique id to avoid chunk collision, just in case
|
|
$uniqueId = \OC::$server->getSecureRandom()->getLowStrengthGenerator()->generate(
|
|
16,
|
|
ISecureRandom::CHAR_DIGITS . ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_UPPER
|
|
);
|
|
|
|
// use part file to prevent hasKey() to find the key
|
|
// while it is being written
|
|
$keyPart = $key . '.' . $uniqueId . '.part';
|
|
if ($storage and $storage->file_put_contents($keyPart, $value)) {
|
|
if ($ttl === 0) {
|
|
$ttl = 86400; // 60*60*24
|
|
}
|
|
$result = $storage->touch($keyPart, time() + $ttl);
|
|
$result &= $storage->rename($keyPart, $key);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @param string $key
|
|
* @return bool
|
|
* @throws \OC\ForbiddenException
|
|
*/
|
|
public function hasKey($key) {
|
|
$storage = $this->getStorage();
|
|
if ($storage && $storage->is_file($key) && $storage->isReadable($key)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string $key
|
|
* @return bool|mixed
|
|
* @throws \OC\ForbiddenException
|
|
*/
|
|
public function remove($key) {
|
|
$storage = $this->getStorage();
|
|
if (!$storage) {
|
|
return false;
|
|
}
|
|
return $storage->unlink($key);
|
|
}
|
|
|
|
/**
|
|
* @param string $prefix
|
|
* @return bool
|
|
* @throws \OC\ForbiddenException
|
|
*/
|
|
public function clear($prefix = '') {
|
|
$storage = $this->getStorage();
|
|
if ($storage and $storage->is_dir('/')) {
|
|
$dh = $storage->opendir('/');
|
|
if (is_resource($dh)) {
|
|
while (($file = readdir($dh)) !== false) {
|
|
if ($file != '.' and $file != '..' and ($prefix === '' || strpos($file, $prefix) === 0)) {
|
|
$storage->unlink('/' . $file);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Runs GC
|
|
* @throws \OC\ForbiddenException
|
|
*/
|
|
public function gc() {
|
|
$storage = $this->getStorage();
|
|
if ($storage and $storage->is_dir('/')) {
|
|
$now = time();
|
|
$dh = $storage->opendir('/');
|
|
if (!is_resource($dh)) {
|
|
return null;
|
|
}
|
|
while (($file = readdir($dh)) !== false) {
|
|
if ($file != '.' and $file != '..') {
|
|
$mtime = $storage->filemtime('/' . $file);
|
|
if ($mtime < $now) {
|
|
$storage->unlink('/' . $file);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|