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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Jesús Macias <jmacias@solidgear.es>
* @author Joas Schilling <coding@schilljs.com>
* @author Juan Pablo Villafañez <jvillafanez@solidgear.es>
* @author Juan Pablo Villafáñez <jvillafanez@solidgear.es>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Philipp Kapfer <philipp.kapfer@gmx.at>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @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 OCA\Files_External\Lib\Storage;
use Icewind\SMB\Exception\AlreadyExistsException;
use Icewind\SMB\Exception\ConnectException;
use Icewind\SMB\Exception\Exception;
use Icewind\SMB\Exception\ForbiddenException;
use Icewind\SMB\Exception\NotFoundException;
use Icewind\SMB\IFileInfo;
use Icewind\SMB\NativeServer;
use Icewind\SMB\Server;
use Icewind\Streams\CallbackWrapper;
use Icewind\Streams\IteratorDirectory;
use OC\Cache\CappedMemoryCache;
use OC\Files\Filesystem;
use OC\Files\Storage\Common;
use OCA\Files_External\Lib\Notify\SMBNotifyHandler;
use OCP\Files\Notify\IChange;
use OCP\Files\Notify\IRenameChange;
use OCP\Files\Storage\INotifyStorage;
use OCP\Files\StorageNotAvailableException;
use OCP\Util;
class SMB extends Common implements INotifyStorage {
/**
* @var \Icewind\SMB\Server
*/
protected $server;
/**
* @var \Icewind\SMB\Share
*/
protected $share;
/**
* @var string
*/
protected $root;
/**
* @var \Icewind\SMB\FileInfo[]
*/
protected $statCache;
public function __construct($params) {
if (isset($params['host']) && isset($params['user']) && isset($params['password']) && isset($params['share'])) {
if (Server::NativeAvailable()) {
$this->server = new NativeServer($params['host'], $params['user'], $params['password']);
} else {
$this->server = new Server($params['host'], $params['user'], $params['password']);
}
$this->share = $this->server->getShare(trim($params['share'], '/'));
$this->root = isset($params['root']) ? $params['root'] : '/';
if (!$this->root || $this->root[0] !== '/') {
$this->root = '/' . $this->root;
}
if (substr($this->root, -1, 1) !== '/') {
$this->root .= '/';
}
} else {
throw new \Exception('Invalid configuration');
}
$this->statCache = new CappedMemoryCache();
parent::__construct($params);
}
/**
* @return string
*/
public function getId() {
// FIXME: double slash to keep compatible with the old storage ids,
// failure to do so will lead to creation of a new storage id and
// loss of shares from the storage
return 'smb::' . $this->server->getUser() . '@' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
}
/**
* @param string $path
* @return string
*/
protected function buildPath($path) {
return Filesystem::normalizePath($this->root . '/' . $path, true, false, true);
}
protected function relativePath($fullPath) {
if ($fullPath === $this->root) {
return '';
} else if (substr($fullPath, 0, strlen($this->root)) === $this->root) {
return substr($fullPath, strlen($this->root));
} else {
return null;
}
}
/**
* @param string $path
* @return \Icewind\SMB\IFileInfo
* @throws StorageNotAvailableException
*/
protected function getFileInfo($path) {
try {
$path = $this->buildPath($path);
if (!isset($this->statCache[$path])) {
$this->statCache[$path] = $this->share->stat($path);
}
return $this->statCache[$path];
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
/**
* @param string $path
* @return \Icewind\SMB\IFileInfo[]
* @throws StorageNotAvailableException
*/
protected function getFolderContents($path) {
try {
$path = $this->buildPath($path);
$files = $this->share->dir($path);
foreach ($files as $file) {
$this->statCache[$path . '/' . $file->getName()] = $file;
}
return array_filter($files, function (IFileInfo $file) {
try {
return !$file->isHidden();
} catch (ForbiddenException $e) {
return false;
} catch (NotFoundException $e) {
return false;
}
});
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
/**
* @param \Icewind\SMB\IFileInfo $info
* @return array
*/
protected function formatInfo($info) {
$result = [
'size' => $info->getSize(),
'mtime' => $info->getMTime(),
];
if ($info->isDirectory()) {
$result['type'] = 'dir';
} else {
$result['type'] = 'file';
}
return $result;
}
/**
* Rename the files. If the source or the target is the root, the rename won't happen.
*
* @param string $source the old name of the path
* @param string $target the new name of the path
* @return bool true if the rename is successful, false otherwise
*/
public function rename($source, $target) {
if ($this->isRootDir($source) || $this->isRootDir($target)) {
return false;
}
$absoluteSource = $this->buildPath($source);
$absoluteTarget = $this->buildPath($target);
try {
$result = $this->share->rename($absoluteSource, $absoluteTarget);
} catch (AlreadyExistsException $e) {
$this->remove($target);
$result = $this->share->rename($absoluteSource, $absoluteTarget);
} catch (\Exception $e) {
\OC::$server->getLogger()->logException($e, ['level' => Util::WARN]);
return false;
}
unset($this->statCache[$absoluteSource], $this->statCache[$absoluteTarget]);
return $result;
}
public function stat($path) {
try {
$result = $this->formatInfo($this->getFileInfo($path));
} catch (ForbiddenException $e) {
return false;
} catch (NotFoundException $e) {
return false;
}
if ($this->remoteIsShare() && $this->isRootDir($path)) {
$result['mtime'] = $this->shareMTime();
}
return $result;
}
/**
* get the best guess for the modification time of the share
*
* @return int
*/
private function shareMTime() {
$highestMTime = 0;
$files = $this->share->dir($this->root);
foreach ($files as $fileInfo) {
try {
if ($fileInfo->getMTime() > $highestMTime) {
$highestMTime = $fileInfo->getMTime();
}
} catch (NotFoundException $e) {
// Ignore this, can happen on unavailable DFS shares
}
}
return $highestMTime;
}
/**
* Check if the path is our root dir (not the smb one)
*
* @param string $path the path
* @return bool
*/
private function isRootDir($path) {
return $path === '' || $path === '/' || $path === '.';
}
/**
* Check if our root points to a smb share
*
* @return bool true if our root points to a share false otherwise
*/
private function remoteIsShare() {
return $this->share->getName() && (!$this->root || $this->root === '/');
}
/**
* @param string $path
* @return bool
*/
public function unlink($path) {
if ($this->isRootDir($path)) {
return false;
}
try {
if ($this->is_dir($path)) {
return $this->rmdir($path);
} else {
$path = $this->buildPath($path);
unset($this->statCache[$path]);
$this->share->del($path);
return true;
}
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
/**
* check if a file or folder has been updated since $time
*
* @param string $path
* @param int $time
* @return bool
*/
public function hasUpdated($path, $time) {
if (!$path and $this->root === '/') {
// mtime doesn't work for shares, but giving the nature of the backend,
// doing a full update is still just fast enough
return true;
} else {
$actualTime = $this->filemtime($path);
return $actualTime > $time;
}
}
/**
* @param string $path
* @param string $mode
* @return resource|false
*/
public function fopen($path, $mode) {
$fullPath = $this->buildPath($path);
try {
switch ($mode) {
case 'r':
case 'rb':
if (!$this->file_exists($path)) {
return false;
}
return $this->share->read($fullPath);
case 'w':
case 'wb':
$source = $this->share->write($fullPath);
return CallBackWrapper::wrap($source, null, null, function () use ($fullPath) {
unset($this->statCache[$fullPath]);
});
case 'a':
case 'ab':
case 'r+':
case 'w+':
case 'wb+':
case 'a+':
case 'x':
case 'x+':
case 'c':
case 'c+':
//emulate these
if (strrpos($path, '.') !== false) {
$ext = substr($path, strrpos($path, '.'));
} else {
$ext = '';
}
if ($this->file_exists($path)) {
if (!$this->isUpdatable($path)) {
return false;
}
$tmpFile = $this->getCachedFile($path);
} else {
if (!$this->isCreatable(dirname($path))) {
return false;
}
$tmpFile = \OCP\Files::tmpFile($ext);
}
$source = fopen($tmpFile, $mode);
$share = $this->share;
return CallbackWrapper::wrap($source, null, null, function () use ($tmpFile, $fullPath, $share) {
unset($this->statCache[$fullPath]);
$share->put($tmpFile, $fullPath);
unlink($tmpFile);
});
}
return false;
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
public function rmdir($path) {
if ($this->isRootDir($path)) {
return false;
}
try {
$this->statCache = array();
$content = $this->share->dir($this->buildPath($path));
foreach ($content as $file) {
if ($file->isDirectory()) {
$this->rmdir($path . '/' . $file->getName());
} else {
$this->share->del($file->getPath());
}
}
$this->share->rmdir($this->buildPath($path));
return true;
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
public function touch($path, $time = null) {
try {
if (!$this->file_exists($path)) {
$fh = $this->share->write($this->buildPath($path));
fclose($fh);
return true;
}
return false;
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
public function opendir($path) {
try {
$files = $this->getFolderContents($path);
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
}
$names = array_map(function ($info) {
/** @var \Icewind\SMB\IFileInfo $info */
return $info->getName();
}, $files);
return IteratorDirectory::wrap($names);
}
public function filetype($path) {
try {
return $this->getFileInfo($path)->isDirectory() ? 'dir' : 'file';
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
}
}
public function mkdir($path) {
$path = $this->buildPath($path);
try {
$this->share->mkdir($path);
return true;
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
} catch (Exception $e) {
return false;
}
}
public function file_exists($path) {
try {
$this->getFileInfo($path);
return true;
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
} catch (ConnectException $e) {
throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
}
}
public function isReadable($path) {
try {
$info = $this->getFileInfo($path);
return !$info->isHidden();
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
}
}
public function isUpdatable($path) {
try {
$info = $this->getFileInfo($path);
// following windows behaviour for read-only folders: they can be written into
// (https://support.microsoft.com/en-us/kb/326549 - "cause" section)
return !$info->isHidden() && (!$info->isReadOnly() || $this->is_dir($path));
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
}
}
public function isDeletable($path) {
try {
$info = $this->getFileInfo($path);
return !$info->isHidden() && !$info->isReadOnly();
} catch (NotFoundException $e) {
return false;
} catch (ForbiddenException $e) {
return false;
}
}
/**
* check if smbclient is installed
*/
public static function checkDependencies() {
return (
(bool)\OC_Helper::findBinaryPath('smbclient')
|| Server::NativeAvailable()
) ? true : ['smbclient'];
}
/**
* Test a storage for availability
*
* @return bool
*/
public function test() {
try {
return parent::test();
} catch (Exception $e) {
return false;
}
}
public function listen($path, callable $callback) {
$this->notify($path)->listen(function (IChange $change) use ($callback) {
if ($change instanceof IRenameChange) {
return $callback($change->getType(), $change->getPath(), $change->getTargetPath());
} else {
return $callback($change->getType(), $change->getPath());
}
});
}
public function notify($path) {
$path = '/' . ltrim($path, '/');
$shareNotifyHandler = $this->share->notify($this->buildPath($path));
return new SMBNotifyHandler($shareNotifyHandler, $this->root);
}
}