397 lines
10 KiB
PHP
397 lines
10 KiB
PHP
<?php
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/**
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <icewind@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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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 OC\Files\ObjectStore;
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use Icewind\Streams\IteratorDirectory;
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use OCP\Files\ObjectStore\IObjectStore;
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class ObjectStoreStorage extends \OC\Files\Storage\Common {
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/**
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* @var array
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*/
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private static $tmpFiles = array();
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/**
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* @var \OCP\Files\ObjectStore\IObjectStore $objectStore
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*/
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protected $objectStore;
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/**
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* @var \OC\User\User $user
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*/
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protected $user;
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public function __construct($params) {
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if (isset($params['objectstore']) && $params['objectstore'] instanceof IObjectStore) {
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$this->objectStore = $params['objectstore'];
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} else {
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throw new \Exception('missing IObjectStore instance');
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}
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if (isset($params['storageid'])) {
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$this->id = 'object::store:' . $params['storageid'];
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} else {
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$this->id = 'object::store:' . $this->objectStore->getStorageId();
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}
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//initialize cache with root directory in cache
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if (!$this->is_dir('/')) {
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$this->mkdir('/');
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}
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}
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public function mkdir($path) {
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$path = $this->normalizePath($path);
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if ($this->file_exists($path)) {
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return false;
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}
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$mTime = time();
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$data = [
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'mimetype' => 'httpd/unix-directory',
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'size' => 0,
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'mtime' => $mTime,
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'storage_mtime' => $mTime,
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'permissions' => \OCP\Constants::PERMISSION_ALL,
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];
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if ($path === '') {
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//create root on the fly
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$data['etag'] = $this->getETag('');
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$this->getCache()->put('', $data);
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return true;
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} else {
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// if parent does not exist, create it
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$parent = $this->normalizePath(dirname($path));
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$parentType = $this->filetype($parent);
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if ($parentType === false) {
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if (!$this->mkdir($parent)) {
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// something went wrong
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return false;
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}
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} else if ($parentType === 'file') {
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// parent is a file
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return false;
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}
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// finally create the new dir
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$mTime = time(); // update mtime
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$data['mtime'] = $mTime;
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$data['storage_mtime'] = $mTime;
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$data['etag'] = $this->getETag($path);
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$this->getCache()->put($path, $data);
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return true;
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}
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}
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/**
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* @param string $path
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* @return string
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*/
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private function normalizePath($path) {
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$path = trim($path, '/');
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//FIXME why do we sometimes get a path like 'files//username'?
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$path = str_replace('//', '/', $path);
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// dirname('/folder') returns '.' but internally (in the cache) we store the root as ''
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if (!$path || $path === '.') {
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$path = '';
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}
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return $path;
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}
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/**
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* Object Stores use a NoopScanner because metadata is directly stored in
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* the file cache and cannot really scan the filesystem. The storage passed in is not used anywhere.
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*
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* @param string $path
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* @param \OC\Files\Storage\Storage (optional) the storage to pass to the scanner
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* @return \OC\Files\ObjectStore\NoopScanner
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*/
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public function getScanner($path = '', $storage = null) {
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if (!$storage) {
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$storage = $this;
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}
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if (!isset($this->scanner)) {
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$this->scanner = new NoopScanner($storage);
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}
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return $this->scanner;
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}
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public function getId() {
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return $this->id;
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}
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public function rmdir($path) {
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$path = $this->normalizePath($path);
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if (!$this->is_dir($path)) {
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return false;
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}
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$this->rmObjects($path);
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$this->getCache()->remove($path);
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return true;
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}
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private function rmObjects($path) {
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$children = $this->getCache()->getFolderContents($path);
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foreach ($children as $child) {
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if ($child['mimetype'] === 'httpd/unix-directory') {
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$this->rmObjects($child['path']);
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} else {
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$this->unlink($child['path']);
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}
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}
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}
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public function unlink($path) {
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$path = $this->normalizePath($path);
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$stat = $this->stat($path);
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if ($stat && isset($stat['fileid'])) {
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if ($stat['mimetype'] === 'httpd/unix-directory') {
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return $this->rmdir($path);
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}
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try {
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$this->objectStore->deleteObject($this->getURN($stat['fileid']));
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} catch (\Exception $ex) {
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if ($ex->getCode() !== 404) {
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\OCP\Util::writeLog('objectstore', 'Could not delete object: ' . $ex->getMessage(), \OCP\Util::ERROR);
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return false;
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} else {
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//removing from cache is ok as it does not exist in the objectstore anyway
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}
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}
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$this->getCache()->remove($path);
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return true;
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}
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return false;
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}
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public function stat($path) {
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$path = $this->normalizePath($path);
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return $this->getCache()->get($path);
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}
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/**
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* Override this method if you need a different unique resource identifier for your object storage implementation.
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* The default implementations just appends the fileId to 'urn:oid:'. Make sure the URN is unique over all users.
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* You may need a mapping table to store your URN if it cannot be generated from the fileid.
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*
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* @param int $fileId the fileid
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* @return null|string the unified resource name used to identify the object
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*/
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protected function getURN($fileId) {
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if (is_numeric($fileId)) {
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return 'urn:oid:' . $fileId;
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}
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return null;
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}
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public function opendir($path) {
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$path = $this->normalizePath($path);
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try {
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$files = array();
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$folderContents = $this->getCache()->getFolderContents($path);
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foreach ($folderContents as $file) {
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$files[] = $file['name'];
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}
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return IteratorDirectory::wrap($files);
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} catch (\Exception $e) {
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\OCP\Util::writeLog('objectstore', $e->getMessage(), \OCP\Util::ERROR);
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return false;
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}
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}
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public function filetype($path) {
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$path = $this->normalizePath($path);
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$stat = $this->stat($path);
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if ($stat) {
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if ($stat['mimetype'] === 'httpd/unix-directory') {
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return 'dir';
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}
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return 'file';
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} else {
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return false;
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}
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}
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public function fopen($path, $mode) {
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$path = $this->normalizePath($path);
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switch ($mode) {
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case 'r':
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case 'rb':
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$stat = $this->stat($path);
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if (is_array($stat)) {
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try {
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return $this->objectStore->readObject($this->getURN($stat['fileid']));
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} catch (\Exception $ex) {
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\OCP\Util::writeLog('objectstore', 'Could not get object: ' . $ex->getMessage(), \OCP\Util::ERROR);
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return false;
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}
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} else {
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return false;
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}
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case 'w':
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case 'wb':
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case 'a':
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case 'ab':
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case 'r+':
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case 'w+':
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case 'wb+':
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case 'a+':
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case 'x':
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case 'x+':
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case 'c':
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case 'c+':
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if (strrpos($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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$tmpFile = \OC_Helper::tmpFile($ext);
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\OC\Files\Stream\Close::registerCallback($tmpFile, array($this, 'writeBack'));
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if ($this->file_exists($path)) {
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$source = $this->fopen($path, 'r');
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file_put_contents($tmpFile, $source);
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}
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self::$tmpFiles[$tmpFile] = $path;
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return fopen('close://' . $tmpFile, $mode);
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}
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return false;
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}
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public function file_exists($path) {
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$path = $this->normalizePath($path);
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return (bool)$this->stat($path);
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}
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public function rename($source, $target) {
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$source = $this->normalizePath($source);
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$target = $this->normalizePath($target);
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$this->remove($target);
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$this->getCache()->move($source, $target);
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$this->touch(dirname($target));
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return true;
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}
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public function getMimeType($path) {
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$path = $this->normalizePath($path);
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$stat = $this->stat($path);
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if (is_array($stat)) {
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return $stat['mimetype'];
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} else {
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return false;
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}
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}
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public function touch($path, $mtime = null) {
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if (is_null($mtime)) {
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$mtime = time();
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}
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$path = $this->normalizePath($path);
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$dirName = dirname($path);
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$parentExists = $this->is_dir($dirName);
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if (!$parentExists) {
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return false;
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}
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$stat = $this->stat($path);
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if (is_array($stat)) {
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// update existing mtime in db
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$stat['mtime'] = $mtime;
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$this->getCache()->update($stat['fileid'], $stat);
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} else {
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$mimeType = \OC_Helper::getFileNameMimeType($path);
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// create new file
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$stat = array(
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'etag' => $this->getETag($path),
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'mimetype' => $mimeType,
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'size' => 0,
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'mtime' => $mtime,
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'storage_mtime' => $mtime,
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'permissions' => \OCP\Constants::PERMISSION_ALL - \OCP\Constants::PERMISSION_CREATE,
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);
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$fileId = $this->getCache()->put($path, $stat);
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try {
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//read an empty file from memory
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$this->objectStore->writeObject($this->getURN($fileId), fopen('php://memory', 'r'));
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} catch (\Exception $ex) {
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$this->getCache()->remove($path);
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\OCP\Util::writeLog('objectstore', 'Could not create object: ' . $ex->getMessage(), \OCP\Util::ERROR);
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return false;
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}
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}
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return true;
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}
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public function writeBack($tmpFile) {
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if (!isset(self::$tmpFiles[$tmpFile])) {
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return;
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}
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$path = self::$tmpFiles[$tmpFile];
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$stat = $this->stat($path);
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if (empty($stat)) {
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// create new file
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$stat = array(
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'permissions' => \OCP\Constants::PERMISSION_ALL - \OCP\Constants::PERMISSION_CREATE,
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);
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}
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// update stat with new data
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$mTime = time();
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$stat['size'] = filesize($tmpFile);
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$stat['mtime'] = $mTime;
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$stat['storage_mtime'] = $mTime;
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$stat['mimetype'] = \OC_Helper::getMimeType($tmpFile);
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$stat['etag'] = $this->getETag($path);
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$fileId = $this->getCache()->put($path, $stat);
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try {
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//upload to object storage
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$this->objectStore->writeObject($this->getURN($fileId), fopen($tmpFile, 'r'));
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} catch (\Exception $ex) {
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$this->getCache()->remove($path);
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\OCP\Util::writeLog('objectstore', 'Could not create object: ' . $ex->getMessage(), \OCP\Util::ERROR);
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throw $ex; // make this bubble up
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}
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}
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/**
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* external changes are not supported, exclusive access to the object storage is assumed
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*
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* @param string $path
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* @param int $time
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* @return false
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*/
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public function hasUpdated($path, $time) {
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return false;
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}
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}
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