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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC;
use bantu\IniGetWrapper\IniGetWrapper;
use OCP\IConfig;
use OCP\ITempManager;
use OCP\Security\ISecureRandom;
use Psr\Log\LoggerInterface;
class TempManager implements ITempManager {
/** @var string[] Current temporary files and folders, used for cleanup */
protected $current = [];
/** @var string i.e. /tmp on linux systems */
protected $tmpBaseDir;
/** @var LoggerInterface */
protected $log;
/** @var IConfig */
protected $config;
/** @var IniGetWrapper */
protected $iniGetWrapper;
/** Prefix */
public const TMP_PREFIX = 'oc_tmp_';
public function __construct(LoggerInterface $logger, IConfig $config, IniGetWrapper $iniGetWrapper) {
$this->log = $logger;
$this->config = $config;
$this->iniGetWrapper = $iniGetWrapper;
$this->tmpBaseDir = $this->getTempBaseDir();
}
private function generateTemporaryPath(string $postFix): string {
$secureRandom = \OCP\Server::get(ISecureRandom::class);
$absolutePath = $this->tmpBaseDir . '/' . self::TMP_PREFIX . $secureRandom->generate(32, ISecureRandom::CHAR_ALPHANUMERIC);
if ($postFix !== '') {
$postFix = '.' . ltrim($postFix, '.');
$postFix = str_replace(['\\', '/'], '', $postFix);
}
return $absolutePath . $postFix;
}
public function getTemporaryFile($postFix = ''): string|false {
$path = $this->generateTemporaryPath($postFix);
$old_umask = umask(0077);
$fp = fopen($path, 'x');
umask($old_umask);
if ($fp === false) {
$this->log->warning(
'Can not create a temporary file in directory {dir}. Check it exists and has correct permissions',
[
'dir' => $this->tmpBaseDir,
]
);
return false;
}
fclose($fp);
$this->current[] = $path;
return $path;
}
public function getTemporaryFolder($postFix = ''): string|false {
$path = $this->generateTemporaryPath($postFix) . '/';
if (mkdir($path, 0700) === false) {
$this->log->warning(
'Can not create a temporary folder in directory {dir}. Check it exists and has correct permissions',
[
'dir' => $this->tmpBaseDir,
]
);
return false;
}
$this->current[] = $path;
return $path;
}
/**
* Remove the temporary files and folders generated during this request
*/
public function clean() {
$this->cleanFiles($this->current);
}
/**
* @param string[] $files
*/
protected function cleanFiles($files) {
foreach ($files as $file) {
if (file_exists($file)) {
try {
\OC_Helper::rmdirr($file);
} catch (\UnexpectedValueException $ex) {
$this->log->warning(
'Error deleting temporary file/folder: {file} - Reason: {error}',
[
'file' => $file,
'error' => $ex->getMessage(),
]
);
}
}
}
}
/**
* Remove old temporary files and folders that were failed to be cleaned
*/
public function cleanOld() {
$this->cleanFiles($this->getOldFiles());
}
/**
* Get all temporary files and folders generated by oc older than an hour
*
* @return string[]
*/
protected function getOldFiles() {
$cutOfTime = time() - 3600;
$files = [];
$dh = opendir($this->tmpBaseDir);
if ($dh) {
while (($file = readdir($dh)) !== false) {
if (substr($file, 0, 7) === self::TMP_PREFIX) {
$path = $this->tmpBaseDir . '/' . $file;
$mtime = filemtime($path);
if ($mtime < $cutOfTime) {
$files[] = $path;
}
}
}
}
return $files;
}
/**
* Get the temporary base directory configured on the server
*
* @return string Path to the temporary directory or null
* @throws \UnexpectedValueException
*/
public function getTempBaseDir() {
if ($this->tmpBaseDir) {
return $this->tmpBaseDir;
}
$directories = [];
if ($temp = $this->config->getSystemValue('tempdirectory', null)) {
$directories[] = $temp;
}
if ($temp = $this->iniGetWrapper->get('upload_tmp_dir')) {
$directories[] = $temp;
}
if ($temp = getenv('TMP')) {
$directories[] = $temp;
}
if ($temp = getenv('TEMP')) {
$directories[] = $temp;
}
if ($temp = getenv('TMPDIR')) {
$directories[] = $temp;
}
if ($temp = sys_get_temp_dir()) {
$directories[] = $temp;
}
foreach ($directories as $dir) {
if ($this->checkTemporaryDirectory($dir)) {
return $dir;
}
}
$temp = tempnam(__DIR__, '');
if (file_exists($temp)) {
unlink($temp);
return dirname($temp);
}
throw new \UnexpectedValueException('Unable to detect system temporary directory');
}
/**
* Check if a temporary directory is ready for use
*
* @param mixed $directory
* @return bool
*/
private function checkTemporaryDirectory($directory) {
// suppress any possible errors caused by is_writable
// checks missing or invalid path or characters, wrong permissions etc
try {
if (is_writable($directory)) {
return true;
}
} catch (\Exception $e) {
}
$this->log->warning('Temporary directory {dir} is not present or writable',
['dir' => $directory]
);
return false;
}
/**
* Override the temporary base directory
*
* @param string $directory
*/
public function overrideTempBaseDir($directory) {
$this->tmpBaseDir = $directory;
}
}
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