nextcloud/lib/private/Files/Storage/Local.php

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<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author aler9 <46489434+aler9@users.noreply.github.com>
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bart Visscher <bartv@thisnet.nl>
* @author Boris Rybalkin <ribalkin@gmail.com>
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* @author Brice Maron <brice@bmaron.net>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author J0WI <J0WI@users.noreply.github.com>
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* @author Jakob Sack <mail@jakobsack.de>
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* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Klaas Freitag <freitag@owncloud.com>
* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Sjors van der Pluijm <sjors@desjors.nl>
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* @author Stefan Weil <sw@weilnetz.de>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
* @author Vincent Petry <vincent@nextcloud.com>
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*
* @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/>
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*
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*/
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namespace OC\Files\Storage;
use OC\Files\Filesystem;
use OC\Files\Storage\Wrapper\Jail;
use OCP\Constants;
use OCP\Files\ForbiddenException;
use OCP\Files\GenericFileException;
use OCP\Files\Storage\IStorage;
use OCP\ILogger;
/**
* for local filestore, we only have to map the paths
*/
class Local extends \OC\Files\Storage\Common {
protected $datadir;
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protected $dataDirLength;
protected $realDataDir;
public function __construct($arguments) {
if (!isset($arguments['datadir']) || !is_string($arguments['datadir'])) {
throw new \InvalidArgumentException('No data directory set for local storage');
}
$this->datadir = str_replace('//', '/', $arguments['datadir']);
// some crazy code uses a local storage on root...
if ($this->datadir === '/') {
$this->realDataDir = $this->datadir;
} else {
$realPath = realpath($this->datadir) ?: $this->datadir;
$this->realDataDir = rtrim($realPath, '/') . '/';
}
if (substr($this->datadir, -1) !== '/') {
$this->datadir .= '/';
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}
$this->dataDirLength = strlen($this->realDataDir);
}
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public function __destruct() {
}
public function getId() {
return 'local::' . $this->datadir;
}
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public function mkdir($path) {
return @mkdir($this->getSourcePath($path), 0777, true);
}
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public function rmdir($path) {
if (!$this->isDeletable($path)) {
return false;
}
try {
$it = new \RecursiveIteratorIterator(
new \RecursiveDirectoryIterator($this->getSourcePath($path)),
\RecursiveIteratorIterator::CHILD_FIRST
);
/**
* RecursiveDirectoryIterator on an NFS path isn't iterable with foreach
* This bug is fixed in PHP 5.5.9 or before
* See #8376
*/
$it->rewind();
while ($it->valid()) {
/**
* @var \SplFileInfo $file
*/
$file = $it->current();
clearstatcache(true, $this->getSourcePath($file));
if (in_array($file->getBasename(), ['.', '..'])) {
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$it->next();
continue;
} elseif ($file->isDir()) {
rmdir($file->getPathname());
} elseif ($file->isFile() || $file->isLink()) {
unlink($file->getPathname());
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}
$it->next();
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}
clearstatcache(true, $this->getSourcePath($path));
return rmdir($this->getSourcePath($path));
} catch (\UnexpectedValueException $e) {
return false;
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}
}
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public function opendir($path) {
return opendir($this->getSourcePath($path));
}
public function is_dir($path) {
if (substr($path, -1) == '/') {
$path = substr($path, 0, -1);
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}
return is_dir($this->getSourcePath($path));
}
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public function is_file($path) {
return is_file($this->getSourcePath($path));
}
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public function stat($path) {
$fullPath = $this->getSourcePath($path);
clearstatcache(true, $fullPath);
$statResult = @stat($fullPath);
if (PHP_INT_SIZE === 4 && $statResult && !$this->is_dir($path)) {
$filesize = $this->filesize($path);
$statResult['size'] = $filesize;
$statResult[7] = $filesize;
}
return $statResult;
}
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/**
* @inheritdoc
*/
public function getMetaData($path) {
$stat = $this->stat($path);
if (!$stat) {
return null;
}
$permissions = Constants::PERMISSION_SHARE;
$statPermissions = $stat['mode'];
$isDir = ($statPermissions & 0x4000) === 0x4000;
if ($statPermissions & 0x0100) {
$permissions += Constants::PERMISSION_READ;
}
if ($statPermissions & 0x0080) {
$permissions += Constants::PERMISSION_UPDATE;
if ($isDir) {
$permissions += Constants::PERMISSION_CREATE;
}
}
if (!($path === '' || $path === '/')) { // deletable depends on the parents unix permissions
$fullPath = $this->getSourcePath($path);
$parent = dirname($fullPath);
if (is_writable($parent)) {
$permissions += Constants::PERMISSION_DELETE;
}
}
$data = [];
$data['mimetype'] = $isDir ? 'httpd/unix-directory' : \OC::$server->getMimeTypeDetector()->detectPath($path);
$data['mtime'] = $stat['mtime'];
if ($data['mtime'] === false) {
$data['mtime'] = time();
}
if ($isDir) {
$data['size'] = -1; //unknown
} else {
$data['size'] = $stat['size'];
}
$data['etag'] = $this->calculateEtag($path, $stat);
$data['storage_mtime'] = $data['mtime'];
$data['permissions'] = $permissions;
$data['name'] = basename($path);
return $data;
}
public function filetype($path) {
$filetype = filetype($this->getSourcePath($path));
if ($filetype == 'link') {
$filetype = filetype(realpath($this->getSourcePath($path)));
}
return $filetype;
}
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public function filesize($path) {
if ($this->is_dir($path)) {
return 0;
}
$fullPath = $this->getSourcePath($path);
if (PHP_INT_SIZE === 4) {
$helper = new \OC\LargeFileHelper;
return $helper->getFileSize($fullPath);
}
return filesize($fullPath);
}
public function isReadable($path) {
return is_readable($this->getSourcePath($path));
}
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public function isUpdatable($path) {
return is_writable($this->getSourcePath($path));
}
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public function file_exists($path) {
return file_exists($this->getSourcePath($path));
}
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public function filemtime($path) {
$fullPath = $this->getSourcePath($path);
clearstatcache(true, $fullPath);
if (!$this->file_exists($path)) {
return false;
}
if (PHP_INT_SIZE === 4) {
$helper = new \OC\LargeFileHelper();
return $helper->getFileMtime($fullPath);
}
return filemtime($fullPath);
}
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public function touch($path, $mtime = null) {
// sets the modification time of the file to the given value.
// If mtime is nil the current time is set.
// note that the access time of the file always changes to the current time.
if ($this->file_exists($path) and !$this->isUpdatable($path)) {
return false;
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}
if (!is_null($mtime)) {
$result = @touch($this->getSourcePath($path), $mtime);
} else {
$result = @touch($this->getSourcePath($path));
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}
if ($result) {
clearstatcache(true, $this->getSourcePath($path));
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}
return $result;
}
public function file_get_contents($path) {
return file_get_contents($this->getSourcePath($path));
}
public function file_put_contents($path, $data) {
return file_put_contents($this->getSourcePath($path), $data);
}
public function unlink($path) {
if ($this->is_dir($path)) {
return $this->rmdir($path);
} elseif ($this->is_file($path)) {
return unlink($this->getSourcePath($path));
} else {
return false;
}
}
private function treeContainsBlacklistedFile(string $path): bool {
$iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path));
foreach ($iterator as $file) {
/** @var \SplFileInfo $file */
if (Filesystem::isFileBlacklisted($file->getBasename())) {
return true;
}
}
return false;
}
public function rename($path1, $path2) {
$srcParent = dirname($path1);
$dstParent = dirname($path2);
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if (!$this->isUpdatable($srcParent)) {
\OCP\Util::writeLog('core', 'unable to rename, source directory is not writable : ' . $srcParent, ILogger::ERROR);
return false;
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}
if (!$this->isUpdatable($dstParent)) {
\OCP\Util::writeLog('core', 'unable to rename, destination directory is not writable : ' . $dstParent, ILogger::ERROR);
return false;
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}
if (!$this->file_exists($path1)) {
\OCP\Util::writeLog('core', 'unable to rename, file does not exists : ' . $path1, ILogger::ERROR);
return false;
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}
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if ($this->is_dir($path2)) {
$this->rmdir($path2);
} elseif ($this->is_file($path2)) {
$this->unlink($path2);
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}
if ($this->is_dir($path1)) {
// we can't move folders across devices, use copy instead
$stat1 = stat(dirname($this->getSourcePath($path1)));
$stat2 = stat(dirname($this->getSourcePath($path2)));
if ($stat1['dev'] !== $stat2['dev']) {
$result = $this->copy($path1, $path2);
if ($result) {
$result &= $this->rmdir($path1);
}
return $result;
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}
if ($this->treeContainsBlacklistedFile($this->getSourcePath($path1))) {
throw new ForbiddenException('Invalid path', false);
}
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}
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return rename($this->getSourcePath($path1), $this->getSourcePath($path2));
}
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public function copy($path1, $path2) {
if ($this->is_dir($path1)) {
return parent::copy($path1, $path2);
} else {
return copy($this->getSourcePath($path1), $this->getSourcePath($path2));
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}
}
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public function fopen($path, $mode) {
return fopen($this->getSourcePath($path), $mode);
}
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public function hash($type, $path, $raw = false) {
return hash_file($type, $this->getSourcePath($path), $raw);
}
public function free_space($path) {
$sourcePath = $this->getSourcePath($path);
// using !is_dir because $sourcePath might be a part file or
// non-existing file, so we'd still want to use the parent dir
// in such cases
if (!is_dir($sourcePath)) {
// disk_free_space doesn't work on files
$sourcePath = dirname($sourcePath);
}
$space = @disk_free_space($sourcePath);
if ($space === false || is_null($space)) {
return \OCP\Files\FileInfo::SPACE_UNKNOWN;
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}
return $space;
}
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public function search($query) {
return $this->searchInDir($query);
}
public function getLocalFile($path) {
return $this->getSourcePath($path);
}
public function getLocalFolder($path) {
return $this->getSourcePath($path);
}
/**
* @param string $query
* @param string $dir
* @return array
*/
protected function searchInDir($query, $dir = '') {
$files = [];
$physicalDir = $this->getSourcePath($dir);
foreach (scandir($physicalDir) as $item) {
if (\OC\Files\Filesystem::isIgnoredDir($item)) {
continue;
}
$physicalItem = $physicalDir . '/' . $item;
if (strstr(strtolower($item), strtolower($query)) !== false) {
$files[] = $dir . '/' . $item;
}
if (is_dir($physicalItem)) {
$files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
}
}
return $files;
}
/**
* check if a file or folder has been updated since $time
*
* @param string $path
* @param int $time
* @return bool
*/
public function hasUpdated($path, $time) {
if ($this->file_exists($path)) {
return $this->filemtime($path) > $time;
} else {
return true;
}
}
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/**
* Get the source path (on disk) of a given path
*
* @param string $path
* @return string
* @throws ForbiddenException
*/
public function getSourcePath($path) {
if (Filesystem::isFileBlacklisted($path)) {
throw new ForbiddenException('Invalid path', false);
}
$fullPath = $this->datadir . $path;
$currentPath = $path;
$allowSymlinks = \OC::$server->getConfig()->getSystemValue('localstorage.allowsymlinks', false);
if ($allowSymlinks || $currentPath === '') {
return $fullPath;
}
$pathToResolve = $fullPath;
$realPath = realpath($pathToResolve);
while ($realPath === false) { // for non existing files check the parent directory
$currentPath = dirname($currentPath);
if ($currentPath === '' || $currentPath === '.') {
return $fullPath;
}
$realPath = realpath($this->datadir . $currentPath);
}
if ($realPath) {
$realPath = $realPath . '/';
}
if (substr($realPath, 0, $this->dataDirLength) === $this->realDataDir) {
return $fullPath;
}
\OCP\Util::writeLog('core', "Following symlinks is not allowed ('$fullPath' -> '$realPath' not inside '{$this->realDataDir}')", ILogger::ERROR);
throw new ForbiddenException('Following symlinks is not allowed', false);
}
/**
* {@inheritdoc}
*/
public function isLocal() {
return true;
}
/**
* get the ETag for a file or folder
*
* @param string $path
* @return string
*/
public function getETag($path) {
return $this->calculateEtag($path, $this->stat($path));
}
private function calculateEtag(string $path, array $stat): string {
if ($stat['mode'] & 0x4000) { // is_dir
return parent::getETag($path);
} else {
if ($stat === false) {
return md5('');
}
$toHash = '';
if (isset($stat['mtime'])) {
$toHash .= $stat['mtime'];
}
if (isset($stat['ino'])) {
$toHash .= $stat['ino'];
}
if (isset($stat['dev'])) {
$toHash .= $stat['dev'];
}
if (isset($stat['size'])) {
$toHash .= $stat['size'];
}
return md5($toHash);
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}
}
/**
* @param IStorage $sourceStorage
* @param string $sourceInternalPath
* @param string $targetInternalPath
* @param bool $preserveMtime
* @return bool
*/
public function copyFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime = false) {
if ($sourceStorage->instanceOfStorage(Local::class)) {
if ($sourceStorage->instanceOfStorage(Jail::class)) {
/**
* @var \OC\Files\Storage\Wrapper\Jail $sourceStorage
*/
$sourceInternalPath = $sourceStorage->getUnjailedPath($sourceInternalPath);
}
/**
* @var \OC\Files\Storage\Local $sourceStorage
*/
$rootStorage = new Local(['datadir' => '/']);
return $rootStorage->copy($sourceStorage->getSourcePath($sourceInternalPath), $this->getSourcePath($targetInternalPath));
} else {
return parent::copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
}
}
/**
* @param IStorage $sourceStorage
* @param string $sourceInternalPath
* @param string $targetInternalPath
* @return bool
*/
public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) {
if ($sourceStorage->instanceOfStorage(Local::class)) {
if ($sourceStorage->instanceOfStorage(Jail::class)) {
/**
* @var \OC\Files\Storage\Wrapper\Jail $sourceStorage
*/
$sourceInternalPath = $sourceStorage->getUnjailedPath($sourceInternalPath);
}
/**
* @var \OC\Files\Storage\Local $sourceStorage
*/
$rootStorage = new Local(['datadir' => '/']);
return $rootStorage->rename($sourceStorage->getSourcePath($sourceInternalPath), $this->getSourcePath($targetInternalPath));
} else {
return parent::moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
}
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}
public function writeStream(string $path, $stream, int $size = null): int {
$result = $this->file_put_contents($path, $stream);
if ($result === false) {
throw new GenericFileException("Failed write steam to $path");
} else {
return $result;
}
}
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}