538 lines
14 KiB
PHP
538 lines
14 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Jesús Macias <jmacias@solidgear.es>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Juan Pablo Villafañez <jvillafanez@solidgear.es>
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* @author Juan Pablo Villafáñez <jvillafanez@solidgear.es>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Philipp Kapfer <philipp.kapfer@gmx.at>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* 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 OCA\Files_External\Lib\Storage;
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use Icewind\SMB\Exception\AlreadyExistsException;
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use Icewind\SMB\Exception\ConnectException;
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use Icewind\SMB\Exception\Exception;
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use Icewind\SMB\Exception\ForbiddenException;
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use Icewind\SMB\Exception\NotFoundException;
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use Icewind\SMB\IFileInfo;
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use Icewind\SMB\NativeServer;
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use Icewind\SMB\Server;
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use Icewind\Streams\CallbackWrapper;
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use Icewind\Streams\IteratorDirectory;
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use OC\Cache\CappedMemoryCache;
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use OC\Files\Filesystem;
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use OC\Files\Storage\Common;
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use OCA\Files_External\Lib\Notify\SMBNotifyHandler;
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use OCP\Files\Notify\IChange;
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use OCP\Files\Notify\IRenameChange;
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use OCP\Files\Storage\INotifyStorage;
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use OCP\Files\StorageNotAvailableException;
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use OCP\Util;
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class SMB extends Common implements INotifyStorage {
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/**
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* @var \Icewind\SMB\Server
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*/
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protected $server;
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/**
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* @var \Icewind\SMB\Share
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*/
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protected $share;
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/**
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* @var string
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*/
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protected $root;
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/**
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* @var \Icewind\SMB\FileInfo[]
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*/
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protected $statCache;
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public function __construct($params) {
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if (isset($params['host']) && isset($params['user']) && isset($params['password']) && isset($params['share'])) {
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if (Server::NativeAvailable()) {
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$this->server = new NativeServer($params['host'], $params['user'], $params['password']);
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} else {
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$this->server = new Server($params['host'], $params['user'], $params['password']);
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}
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$this->share = $this->server->getShare(trim($params['share'], '/'));
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$this->root = $params['root'] ?? '/';
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$this->root = '/' . ltrim($this->root, '/');
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$this->root = rtrim($this->root, '/') . '/';
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} else {
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throw new \Exception('Invalid configuration');
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}
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$this->statCache = new CappedMemoryCache();
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parent::__construct($params);
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}
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/**
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* @return string
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*/
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public function getId() {
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// FIXME: double slash to keep compatible with the old storage ids,
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// failure to do so will lead to creation of a new storage id and
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// loss of shares from the storage
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return 'smb::' . $this->server->getUser() . '@' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
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}
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/**
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* @param string $path
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* @return string
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*/
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protected function buildPath($path) {
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return Filesystem::normalizePath($this->root . '/' . $path, true, false, true);
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}
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protected function relativePath($fullPath) {
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if ($fullPath === $this->root) {
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return '';
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} else if (substr($fullPath, 0, strlen($this->root)) === $this->root) {
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return substr($fullPath, strlen($this->root));
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} else {
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return null;
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}
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}
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/**
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* @param string $path
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* @return \Icewind\SMB\IFileInfo
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* @throws StorageNotAvailableException
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*/
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protected function getFileInfo($path) {
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try {
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$path = $this->buildPath($path);
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if (!isset($this->statCache[$path])) {
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$this->statCache[$path] = $this->share->stat($path);
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}
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return $this->statCache[$path];
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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/**
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* @param string $path
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* @return \Icewind\SMB\IFileInfo[]
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* @throws StorageNotAvailableException
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*/
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protected function getFolderContents($path) {
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try {
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$path = $this->buildPath($path);
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$files = $this->share->dir($path);
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foreach ($files as $file) {
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$this->statCache[$path . '/' . $file->getName()] = $file;
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}
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return array_filter($files, function (IFileInfo $file) {
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try {
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return !$file->isHidden();
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} catch (ForbiddenException $e) {
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return false;
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} catch (NotFoundException $e) {
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return false;
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}
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});
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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/**
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* @param \Icewind\SMB\IFileInfo $info
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* @return array
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*/
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protected function formatInfo($info) {
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$result = [
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'size' => $info->getSize(),
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'mtime' => $info->getMTime(),
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];
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if ($info->isDirectory()) {
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$result['type'] = 'dir';
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} else {
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$result['type'] = 'file';
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}
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return $result;
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}
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/**
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* Rename the files. If the source or the target is the root, the rename won't happen.
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*
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* @param string $source the old name of the path
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* @param string $target the new name of the path
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* @return bool true if the rename is successful, false otherwise
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*/
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public function rename($source, $target) {
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if ($this->isRootDir($source) || $this->isRootDir($target)) {
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return false;
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}
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$absoluteSource = $this->buildPath($source);
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$absoluteTarget = $this->buildPath($target);
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try {
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$result = $this->share->rename($absoluteSource, $absoluteTarget);
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} catch (AlreadyExistsException $e) {
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$this->remove($target);
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$result = $this->share->rename($absoluteSource, $absoluteTarget);
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} catch (\Exception $e) {
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\OC::$server->getLogger()->logException($e, ['level' => Util::WARN]);
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return false;
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}
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unset($this->statCache[$absoluteSource], $this->statCache[$absoluteTarget]);
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return $result;
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}
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public function stat($path) {
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try {
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$result = $this->formatInfo($this->getFileInfo($path));
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} catch (ForbiddenException $e) {
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return false;
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} catch (NotFoundException $e) {
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return false;
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}
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if ($this->remoteIsShare() && $this->isRootDir($path)) {
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$result['mtime'] = $this->shareMTime();
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}
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return $result;
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}
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/**
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* get the best guess for the modification time of the share
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*
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* @return int
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*/
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private function shareMTime() {
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$highestMTime = 0;
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$files = $this->share->dir($this->root);
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foreach ($files as $fileInfo) {
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try {
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if ($fileInfo->getMTime() > $highestMTime) {
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$highestMTime = $fileInfo->getMTime();
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}
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} catch (NotFoundException $e) {
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// Ignore this, can happen on unavailable DFS shares
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}
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}
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return $highestMTime;
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}
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/**
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* Check if the path is our root dir (not the smb one)
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*
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* @param string $path the path
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* @return bool
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*/
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private function isRootDir($path) {
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return $path === '' || $path === '/' || $path === '.';
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}
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/**
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* Check if our root points to a smb share
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*
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* @return bool true if our root points to a share false otherwise
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*/
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private function remoteIsShare() {
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return $this->share->getName() && (!$this->root || $this->root === '/');
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}
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/**
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* @param string $path
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* @return bool
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*/
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public function unlink($path) {
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if ($this->isRootDir($path)) {
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return false;
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}
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try {
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if ($this->is_dir($path)) {
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return $this->rmdir($path);
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} else {
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$path = $this->buildPath($path);
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unset($this->statCache[$path]);
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$this->share->del($path);
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return true;
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}
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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/**
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* check if a file or folder has been updated since $time
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*
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* @param string $path
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* @param int $time
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* @return bool
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*/
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public function hasUpdated($path, $time) {
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if (!$path and $this->root === '/') {
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// mtime doesn't work for shares, but giving the nature of the backend,
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// doing a full update is still just fast enough
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return true;
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} else {
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$actualTime = $this->filemtime($path);
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return $actualTime > $time;
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}
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}
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/**
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* @param string $path
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* @param string $mode
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* @return resource|false
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*/
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public function fopen($path, $mode) {
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$fullPath = $this->buildPath($path);
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try {
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switch ($mode) {
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case 'r':
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case 'rb':
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if (!$this->file_exists($path)) {
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return false;
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}
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return $this->share->read($fullPath);
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case 'w':
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case 'wb':
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$source = $this->share->write($fullPath);
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return CallBackWrapper::wrap($source, null, null, function () use ($fullPath) {
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unset($this->statCache[$fullPath]);
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});
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case 'a':
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case 'ab':
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case 'r+':
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case 'w+':
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case 'wb+':
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case 'a+':
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case 'x':
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case 'x+':
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case 'c':
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case 'c+':
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//emulate these
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if (strrpos($path, '.') !== false) {
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$ext = substr($path, strrpos($path, '.'));
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} else {
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$ext = '';
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}
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if ($this->file_exists($path)) {
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if (!$this->isUpdatable($path)) {
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return false;
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}
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$tmpFile = $this->getCachedFile($path);
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} else {
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if (!$this->isCreatable(dirname($path))) {
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return false;
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}
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$tmpFile = \OC::$server->getTempManager()->getTemporaryFile($ext);
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}
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$source = fopen($tmpFile, $mode);
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$share = $this->share;
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return CallbackWrapper::wrap($source, null, null, function () use ($tmpFile, $fullPath, $share) {
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unset($this->statCache[$fullPath]);
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$share->put($tmpFile, $fullPath);
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unlink($tmpFile);
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});
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}
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return false;
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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public function rmdir($path) {
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if ($this->isRootDir($path)) {
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return false;
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}
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try {
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$this->statCache = array();
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$content = $this->share->dir($this->buildPath($path));
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foreach ($content as $file) {
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if ($file->isDirectory()) {
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$this->rmdir($path . '/' . $file->getName());
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} else {
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$this->share->del($file->getPath());
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}
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}
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$this->share->rmdir($this->buildPath($path));
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return true;
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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public function touch($path, $time = null) {
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try {
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if (!$this->file_exists($path)) {
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$fh = $this->share->write($this->buildPath($path));
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fclose($fh);
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return true;
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}
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return false;
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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public function opendir($path) {
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try {
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$files = $this->getFolderContents($path);
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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}
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$names = array_map(function ($info) {
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/** @var \Icewind\SMB\IFileInfo $info */
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return $info->getName();
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}, $files);
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return IteratorDirectory::wrap($names);
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}
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public function filetype($path) {
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try {
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return $this->getFileInfo($path)->isDirectory() ? 'dir' : 'file';
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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}
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}
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public function mkdir($path) {
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$path = $this->buildPath($path);
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try {
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$this->share->mkdir($path);
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return true;
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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} catch (Exception $e) {
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return false;
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}
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}
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public function file_exists($path) {
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try {
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$this->getFileInfo($path);
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return true;
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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} catch (ConnectException $e) {
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throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
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}
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}
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public function isReadable($path) {
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try {
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$info = $this->getFileInfo($path);
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return !$info->isHidden();
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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}
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}
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public function isUpdatable($path) {
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try {
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$info = $this->getFileInfo($path);
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// following windows behaviour for read-only folders: they can be written into
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// (https://support.microsoft.com/en-us/kb/326549 - "cause" section)
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return !$info->isHidden() && (!$info->isReadOnly() || $this->is_dir($path));
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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}
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}
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public function isDeletable($path) {
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try {
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$info = $this->getFileInfo($path);
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return !$info->isHidden() && !$info->isReadOnly();
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} catch (NotFoundException $e) {
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return false;
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} catch (ForbiddenException $e) {
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return false;
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}
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}
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/**
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* check if smbclient is installed
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*/
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public static function checkDependencies() {
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return (
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(bool)\OC_Helper::findBinaryPath('smbclient')
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|| Server::NativeAvailable()
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) ? true : ['smbclient'];
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}
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/**
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* Test a storage for availability
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*
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* @return bool
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*/
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public function test() {
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try {
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return parent::test();
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} catch (Exception $e) {
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return false;
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}
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}
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public function listen($path, callable $callback) {
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$this->notify($path)->listen(function (IChange $change) use ($callback) {
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if ($change instanceof IRenameChange) {
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return $callback($change->getType(), $change->getPath(), $change->getTargetPath());
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} else {
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return $callback($change->getType(), $change->getPath());
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}
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});
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}
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public function notify($path) {
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$path = '/' . ltrim($path, '/');
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$shareNotifyHandler = $this->share->notify($this->buildPath($path));
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return new SMBNotifyHandler($shareNotifyHandler, $this->root);
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}
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}
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