850 lines
28 KiB
PHP
850 lines
28 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 Bart Visscher <bartv@thisnet.nl>
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* @author Bjoern Schiessle <bjoern@schiessle.org>
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* @author Björn Schießle <bjoern@schiessle.org>
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* @author Carlos Damken <carlos@damken.com>
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* @author Felix Moeller <mail@felixmoeller.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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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 Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Victor Dubiniuk <dubiniuk@owncloud.com>
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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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/**
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* Versions
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*
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* A class to handle the versioning of files.
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*/
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namespace OCA\Files_Versions;
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use OC\Files\Filesystem;
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use OC\Files\View;
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use OCA\Files_Versions\AppInfo\Application;
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use OCA\Files_Versions\Command\Expire;
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use OCA\Files_Versions\Events\CreateVersionEvent;
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use OCP\Files\NotFoundException;
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use OCP\Lock\ILockingProvider;
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use OCP\User;
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class Storage {
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const DEFAULTENABLED=true;
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const DEFAULTMAXSIZE=50; // unit: percentage; 50% of available disk space/quota
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const VERSIONS_ROOT = 'files_versions/';
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const DELETE_TRIGGER_MASTER_REMOVED = 0;
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const DELETE_TRIGGER_RETENTION_CONSTRAINT = 1;
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const DELETE_TRIGGER_QUOTA_EXCEEDED = 2;
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// files for which we can remove the versions after the delete operation was successful
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private static $deletedFiles = array();
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private static $sourcePathAndUser = array();
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private static $max_versions_per_interval = array(
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//first 10sec, one version every 2sec
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1 => array('intervalEndsAfter' => 10, 'step' => 2),
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//next minute, one version every 10sec
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2 => array('intervalEndsAfter' => 60, 'step' => 10),
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//next hour, one version every minute
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3 => array('intervalEndsAfter' => 3600, 'step' => 60),
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//next 24h, one version every hour
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4 => array('intervalEndsAfter' => 86400, 'step' => 3600),
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//next 30days, one version per day
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5 => array('intervalEndsAfter' => 2592000, 'step' => 86400),
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//until the end one version per week
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6 => array('intervalEndsAfter' => -1, 'step' => 604800),
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);
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/** @var \OCA\Files_Versions\AppInfo\Application */
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private static $application;
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/**
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* get the UID of the owner of the file and the path to the file relative to
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* owners files folder
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*
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* @param string $filename
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* @return array
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* @throws \OC\User\NoUserException
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*/
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public static function getUidAndFilename($filename) {
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$uid = Filesystem::getOwner($filename);
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$userManager = \OC::$server->getUserManager();
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// if the user with the UID doesn't exists, e.g. because the UID points
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// to a remote user with a federated cloud ID we use the current logged-in
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// user. We need a valid local user to create the versions
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if (!$userManager->userExists($uid)) {
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$uid = User::getUser();
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}
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Filesystem::initMountPoints($uid);
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if ( $uid !== User::getUser() ) {
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$info = Filesystem::getFileInfo($filename);
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$ownerView = new View('/'.$uid.'/files');
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try {
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$filename = $ownerView->getPath($info['fileid']);
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// make sure that the file name doesn't end with a trailing slash
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// can for example happen single files shared across servers
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$filename = rtrim($filename, '/');
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} catch (NotFoundException $e) {
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$filename = null;
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}
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}
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return [$uid, $filename];
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}
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/**
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* Remember the owner and the owner path of the source file
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*
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* @param string $source source path
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*/
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public static function setSourcePathAndUser($source) {
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list($uid, $path) = self::getUidAndFilename($source);
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self::$sourcePathAndUser[$source] = array('uid' => $uid, 'path' => $path);
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}
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/**
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* Gets the owner and the owner path from the source path
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*
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* @param string $source source path
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* @return array with user id and path
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*/
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public static function getSourcePathAndUser($source) {
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if (isset(self::$sourcePathAndUser[$source])) {
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$uid = self::$sourcePathAndUser[$source]['uid'];
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$path = self::$sourcePathAndUser[$source]['path'];
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unset(self::$sourcePathAndUser[$source]);
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} else {
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$uid = $path = false;
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}
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return array($uid, $path);
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}
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/**
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* get current size of all versions from a given user
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*
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* @param string $user user who owns the versions
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* @return int versions size
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*/
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private static function getVersionsSize($user) {
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$view = new View('/' . $user);
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$fileInfo = $view->getFileInfo('/files_versions');
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return isset($fileInfo['size']) ? $fileInfo['size'] : 0;
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}
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/**
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* store a new version of a file.
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*/
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public static function store($filename) {
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// if the file gets streamed we need to remove the .part extension
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// to get the right target
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$ext = pathinfo($filename, PATHINFO_EXTENSION);
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if ($ext === 'part') {
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$filename = substr($filename, 0, strlen($filename) - 5);
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}
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// we only handle existing files
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if (! Filesystem::file_exists($filename) || Filesystem::is_dir($filename)) {
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return false;
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}
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list($uid, $filename) = self::getUidAndFilename($filename);
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$files_view = new View('/'.$uid .'/files');
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$users_view = new View('/'.$uid);
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$eventDispatcher = \OC::$server->getEventDispatcher();
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$id = $files_view->getFileInfo($filename)->getId();
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$nodes = \OC::$server->getRootFolder()->getById($id);
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foreach ($nodes as $node) {
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$event = new CreateVersionEvent($node);
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$eventDispatcher->dispatch('OCA\Files_Versions::createVersion', $event);
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if ($event->shouldCreateVersion() === false) {
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return false;
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}
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}
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// no use making versions for empty files
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if ($files_view->filesize($filename) === 0) {
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return false;
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}
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// create all parent folders
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self::createMissingDirectories($filename, $users_view);
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self::scheduleExpire($uid, $filename);
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// store a new version of a file
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$mtime = $users_view->filemtime('files/' . $filename);
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$users_view->copy('files/' . $filename, 'files_versions/' . $filename . '.v' . $mtime);
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// call getFileInfo to enforce a file cache entry for the new version
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$users_view->getFileInfo('files_versions/' . $filename . '.v' . $mtime);
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}
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/**
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* mark file as deleted so that we can remove the versions if the file is gone
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* @param string $path
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*/
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public static function markDeletedFile($path) {
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list($uid, $filename) = self::getUidAndFilename($path);
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self::$deletedFiles[$path] = array(
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'uid' => $uid,
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'filename' => $filename);
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}
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/**
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* delete the version from the storage and cache
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*
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* @param View $view
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* @param string $path
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*/
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protected static function deleteVersion($view, $path) {
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$view->unlink($path);
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/**
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* @var \OC\Files\Storage\Storage $storage
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* @var string $internalPath
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*/
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list($storage, $internalPath) = $view->resolvePath($path);
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$cache = $storage->getCache($internalPath);
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$cache->remove($internalPath);
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}
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/**
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* Delete versions of a file
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*/
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public static function delete($path) {
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$deletedFile = self::$deletedFiles[$path];
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$uid = $deletedFile['uid'];
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$filename = $deletedFile['filename'];
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if (!Filesystem::file_exists($path)) {
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$view = new View('/' . $uid . '/files_versions');
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$versions = self::getVersions($uid, $filename);
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if (!empty($versions)) {
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foreach ($versions as $v) {
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\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED));
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self::deleteVersion($view, $filename . '.v' . $v['version']);
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\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $path . $v['version'], 'trigger' => self::DELETE_TRIGGER_MASTER_REMOVED));
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}
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}
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}
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unset(self::$deletedFiles[$path]);
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}
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/**
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* Rename or copy versions of a file of the given paths
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*
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* @param string $sourcePath source path of the file to move, relative to
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* the currently logged in user's "files" folder
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* @param string $targetPath target path of the file to move, relative to
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* the currently logged in user's "files" folder
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* @param string $operation can be 'copy' or 'rename'
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*/
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public static function renameOrCopy($sourcePath, $targetPath, $operation) {
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list($sourceOwner, $sourcePath) = self::getSourcePathAndUser($sourcePath);
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// it was a upload of a existing file if no old path exists
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// in this case the pre-hook already called the store method and we can
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// stop here
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if ($sourcePath === false) {
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return true;
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}
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list($targetOwner, $targetPath) = self::getUidAndFilename($targetPath);
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$sourcePath = ltrim($sourcePath, '/');
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$targetPath = ltrim($targetPath, '/');
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$rootView = new View('');
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// did we move a directory ?
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if ($rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
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// does the directory exists for versions too ?
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if ($rootView->is_dir('/' . $sourceOwner . '/files_versions/' . $sourcePath)) {
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// create missing dirs if necessary
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self::createMissingDirectories($targetPath, new View('/'. $targetOwner));
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// move the directory containing the versions
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$rootView->$operation(
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'/' . $sourceOwner . '/files_versions/' . $sourcePath,
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'/' . $targetOwner . '/files_versions/' . $targetPath
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);
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}
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} else if ($versions = Storage::getVersions($sourceOwner, '/' . $sourcePath)) {
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// create missing dirs if necessary
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self::createMissingDirectories($targetPath, new View('/'. $targetOwner));
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foreach ($versions as $v) {
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// move each version one by one to the target directory
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$rootView->$operation(
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'/' . $sourceOwner . '/files_versions/' . $sourcePath.'.v' . $v['version'],
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'/' . $targetOwner . '/files_versions/' . $targetPath.'.v'.$v['version']
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);
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}
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}
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// if we moved versions directly for a file, schedule expiration check for that file
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if (!$rootView->is_dir('/' . $targetOwner . '/files/' . $targetPath)) {
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self::scheduleExpire($targetOwner, $targetPath);
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}
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}
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/**
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* Rollback to an old version of a file.
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*
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* @param string $file file name
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* @param int $revision revision timestamp
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* @return bool
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*/
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public static function rollback($file, $revision) {
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// add expected leading slash
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$file = '/' . ltrim($file, '/');
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list($uid, $filename) = self::getUidAndFilename($file);
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if ($uid === null || trim($filename, '/') === '') {
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return false;
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}
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$users_view = new View('/'.$uid);
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$files_view = new View('/'. User::getUser().'/files');
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$versionCreated = false;
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$fileInfo = $files_view->getFileInfo($file);
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// check if user has the permissions to revert a version
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if (!$fileInfo->isUpdateable()) {
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return false;
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}
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//first create a new version
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$version = 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename);
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if (!$users_view->file_exists($version)) {
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$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
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$versionCreated = true;
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}
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$fileToRestore = 'files_versions' . $filename . '.v' . $revision;
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// Restore encrypted version of the old file for the newly restored file
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// This has to happen manually here since the file is manually copied below
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$oldVersion = $users_view->getFileInfo($fileToRestore)->getEncryptedVersion();
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$oldFileInfo = $users_view->getFileInfo($fileToRestore);
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$cache = $fileInfo->getStorage()->getCache();
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$cache->update(
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$fileInfo->getId(), [
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'encrypted' => $oldVersion,
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'encryptedVersion' => $oldVersion,
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'size' => $oldFileInfo->getSize()
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]
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);
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// rollback
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if (self::copyFileContents($users_view, $fileToRestore, 'files' . $filename)) {
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$files_view->touch($file, $revision);
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Storage::scheduleExpire($uid, $file);
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\OC_Hook::emit('\OCP\Versions', 'rollback', array(
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'path' => $filename,
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'revision' => $revision,
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));
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return true;
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} else if ($versionCreated) {
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self::deleteVersion($users_view, $version);
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}
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return false;
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}
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/**
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* Stream copy file contents from $path1 to $path2
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*
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* @param View $view view to use for copying
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* @param string $path1 source file to copy
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* @param string $path2 target file
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*
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* @return bool true for success, false otherwise
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*/
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private static function copyFileContents($view, $path1, $path2) {
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/** @var \OC\Files\Storage\Storage $storage1 */
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list($storage1, $internalPath1) = $view->resolvePath($path1);
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/** @var \OC\Files\Storage\Storage $storage2 */
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list($storage2, $internalPath2) = $view->resolvePath($path2);
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$view->lockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
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$view->lockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
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// TODO add a proper way of overwriting a file while maintaining file ids
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if ($storage1->instanceOfStorage('\OC\Files\ObjectStore\ObjectStoreStorage') || $storage2->instanceOfStorage('\OC\Files\ObjectStore\ObjectStoreStorage')) {
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$source = $storage1->fopen($internalPath1, 'r');
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$target = $storage2->fopen($internalPath2, 'w');
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list(, $result) = \OC_Helper::streamCopy($source, $target);
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fclose($source);
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fclose($target);
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if ($result !== false) {
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$storage1->unlink($internalPath1);
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}
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} else {
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$result = $storage2->moveFromStorage($storage1, $internalPath1, $internalPath2);
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}
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$view->unlockFile($path1, ILockingProvider::LOCK_EXCLUSIVE);
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$view->unlockFile($path2, ILockingProvider::LOCK_EXCLUSIVE);
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return ($result !== false);
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}
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/**
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* get a list of all available versions of a file in descending chronological order
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* @param string $uid user id from the owner of the file
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* @param string $filename file to find versions of, relative to the user files dir
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* @param string $userFullPath
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* @return array versions newest version first
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*/
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public static function getVersions($uid, $filename, $userFullPath = '') {
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$versions = array();
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if (empty($filename)) {
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return $versions;
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}
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// fetch for old versions
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$view = new View('/' . $uid . '/');
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$pathinfo = pathinfo($filename);
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$versionedFile = $pathinfo['basename'];
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$dir = Filesystem::normalizePath(self::VERSIONS_ROOT . '/' . $pathinfo['dirname']);
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$dirContent = false;
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if ($view->is_dir($dir)) {
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$dirContent = $view->opendir($dir);
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}
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if ($dirContent === false) {
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return $versions;
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}
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if (is_resource($dirContent)) {
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while (($entryName = readdir($dirContent)) !== false) {
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if (!Filesystem::isIgnoredDir($entryName)) {
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$pathparts = pathinfo($entryName);
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$filename = $pathparts['filename'];
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if ($filename === $versionedFile) {
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$pathparts = pathinfo($entryName);
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$timestamp = substr($pathparts['extension'], 1);
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$filename = $pathparts['filename'];
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$key = $timestamp . '#' . $filename;
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$versions[$key]['version'] = $timestamp;
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$versions[$key]['humanReadableTimestamp'] = self::getHumanReadableTimestamp($timestamp);
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if (empty($userFullPath)) {
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$versions[$key]['preview'] = '';
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} else {
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$versions[$key]['preview'] = \OC::$server->getURLGenerator('files_version.Preview.getPreview', ['file' => $userFullPath, 'version' => $timestamp]);
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}
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$versions[$key]['path'] = Filesystem::normalizePath($pathinfo['dirname'] . '/' . $filename);
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$versions[$key]['name'] = $versionedFile;
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$versions[$key]['size'] = $view->filesize($dir . '/' . $entryName);
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$versions[$key]['mimetype'] = \OC::$server->getMimeTypeDetector()->detectPath($versionedFile);
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}
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}
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}
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closedir($dirContent);
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}
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// sort with newest version first
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krsort($versions);
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return $versions;
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}
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/**
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* Expire versions that older than max version retention time
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|
* @param string $uid
|
|
*/
|
|
public static function expireOlderThanMaxForUser($uid){
|
|
$expiration = self::getExpiration();
|
|
$threshold = $expiration->getMaxAgeAsTimestamp();
|
|
$versions = self::getAllVersions($uid);
|
|
if (!$threshold || !array_key_exists('all', $versions)) {
|
|
return;
|
|
}
|
|
|
|
$toDelete = [];
|
|
foreach (array_reverse($versions['all']) as $key => $version) {
|
|
if (intval($version['version'])<$threshold) {
|
|
$toDelete[$key] = $version;
|
|
} else {
|
|
//Versions are sorted by time - nothing mo to iterate.
|
|
break;
|
|
}
|
|
}
|
|
|
|
$view = new View('/' . $uid . '/files_versions');
|
|
if (!empty($toDelete)) {
|
|
foreach ($toDelete as $version) {
|
|
\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT));
|
|
self::deleteVersion($view, $version['path'] . '.v' . $version['version']);
|
|
\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_RETENTION_CONSTRAINT));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* translate a timestamp into a string like "5 days ago"
|
|
* @param int $timestamp
|
|
* @return string for example "5 days ago"
|
|
*/
|
|
private static function getHumanReadableTimestamp($timestamp) {
|
|
|
|
$diff = time() - $timestamp;
|
|
|
|
if ($diff < 60) { // first minute
|
|
return $diff . " seconds ago";
|
|
} elseif ($diff < 3600) { //first hour
|
|
return round($diff / 60) . " minutes ago";
|
|
} elseif ($diff < 86400) { // first day
|
|
return round($diff / 3600) . " hours ago";
|
|
} elseif ($diff < 604800) { //first week
|
|
return round($diff / 86400) . " days ago";
|
|
} elseif ($diff < 2419200) { //first month
|
|
return round($diff / 604800) . " weeks ago";
|
|
} elseif ($diff < 29030400) { // first year
|
|
return round($diff / 2419200) . " months ago";
|
|
} else {
|
|
return round($diff / 29030400) . " years ago";
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* returns all stored file versions from a given user
|
|
* @param string $uid id of the user
|
|
* @return array with contains two arrays 'all' which contains all versions sorted by age and 'by_file' which contains all versions sorted by filename
|
|
*/
|
|
private static function getAllVersions($uid) {
|
|
$view = new View('/' . $uid . '/');
|
|
$dirs = array(self::VERSIONS_ROOT);
|
|
$versions = array();
|
|
|
|
while (!empty($dirs)) {
|
|
$dir = array_pop($dirs);
|
|
$files = $view->getDirectoryContent($dir);
|
|
|
|
foreach ($files as $file) {
|
|
$fileData = $file->getData();
|
|
$filePath = $dir . '/' . $fileData['name'];
|
|
if ($file['type'] === 'dir') {
|
|
array_push($dirs, $filePath);
|
|
} else {
|
|
$versionsBegin = strrpos($filePath, '.v');
|
|
$relPathStart = strlen(self::VERSIONS_ROOT);
|
|
$version = substr($filePath, $versionsBegin + 2);
|
|
$relpath = substr($filePath, $relPathStart, $versionsBegin - $relPathStart);
|
|
$key = $version . '#' . $relpath;
|
|
$versions[$key] = array('path' => $relpath, 'timestamp' => $version);
|
|
}
|
|
}
|
|
}
|
|
|
|
// newest version first
|
|
krsort($versions);
|
|
|
|
$result = array();
|
|
|
|
foreach ($versions as $key => $value) {
|
|
$size = $view->filesize(self::VERSIONS_ROOT.'/'.$value['path'].'.v'.$value['timestamp']);
|
|
$filename = $value['path'];
|
|
|
|
$result['all'][$key]['version'] = $value['timestamp'];
|
|
$result['all'][$key]['path'] = $filename;
|
|
$result['all'][$key]['size'] = $size;
|
|
|
|
$result['by_file'][$filename][$key]['version'] = $value['timestamp'];
|
|
$result['by_file'][$filename][$key]['path'] = $filename;
|
|
$result['by_file'][$filename][$key]['size'] = $size;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* get list of files we want to expire
|
|
* @param array $versions list of versions
|
|
* @param integer $time
|
|
* @param bool $quotaExceeded is versions storage limit reached
|
|
* @return array containing the list of to deleted versions and the size of them
|
|
*/
|
|
protected static function getExpireList($time, $versions, $quotaExceeded = false) {
|
|
$expiration = self::getExpiration();
|
|
|
|
if ($expiration->shouldAutoExpire()) {
|
|
list($toDelete, $size) = self::getAutoExpireList($time, $versions);
|
|
} else {
|
|
$size = 0;
|
|
$toDelete = []; // versions we want to delete
|
|
}
|
|
|
|
foreach ($versions as $key => $version) {
|
|
if ($expiration->isExpired($version['version'], $quotaExceeded) && !isset($toDelete[$key])) {
|
|
$size += $version['size'];
|
|
$toDelete[$key] = $version['path'] . '.v' . $version['version'];
|
|
}
|
|
}
|
|
|
|
return [$toDelete, $size];
|
|
}
|
|
|
|
/**
|
|
* get list of files we want to expire
|
|
* @param array $versions list of versions
|
|
* @param integer $time
|
|
* @return array containing the list of to deleted versions and the size of them
|
|
*/
|
|
protected static function getAutoExpireList($time, $versions) {
|
|
$size = 0;
|
|
$toDelete = array(); // versions we want to delete
|
|
|
|
$interval = 1;
|
|
$step = Storage::$max_versions_per_interval[$interval]['step'];
|
|
if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] === -1) {
|
|
$nextInterval = -1;
|
|
} else {
|
|
$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
|
|
}
|
|
|
|
$firstVersion = reset($versions);
|
|
$firstKey = key($versions);
|
|
$prevTimestamp = $firstVersion['version'];
|
|
$nextVersion = $firstVersion['version'] - $step;
|
|
unset($versions[$firstKey]);
|
|
|
|
foreach ($versions as $key => $version) {
|
|
$newInterval = true;
|
|
while ($newInterval) {
|
|
if ($nextInterval === -1 || $prevTimestamp > $nextInterval) {
|
|
if ($version['version'] > $nextVersion) {
|
|
//distance between two version too small, mark to delete
|
|
$toDelete[$key] = $version['path'] . '.v' . $version['version'];
|
|
$size += $version['size'];
|
|
\OCP\Util::writeLog('files_versions', 'Mark to expire '. $version['path'] .' next version should be ' . $nextVersion . " or smaller. (prevTimestamp: " . $prevTimestamp . "; step: " . $step, \OCP\Util::INFO);
|
|
} else {
|
|
$nextVersion = $version['version'] - $step;
|
|
$prevTimestamp = $version['version'];
|
|
}
|
|
$newInterval = false; // version checked so we can move to the next one
|
|
} else { // time to move on to the next interval
|
|
$interval++;
|
|
$step = Storage::$max_versions_per_interval[$interval]['step'];
|
|
$nextVersion = $prevTimestamp - $step;
|
|
if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] === -1) {
|
|
$nextInterval = -1;
|
|
} else {
|
|
$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
|
|
}
|
|
$newInterval = true; // we changed the interval -> check same version with new interval
|
|
}
|
|
}
|
|
}
|
|
|
|
return array($toDelete, $size);
|
|
}
|
|
|
|
/**
|
|
* Schedule versions expiration for the given file
|
|
*
|
|
* @param string $uid owner of the file
|
|
* @param string $fileName file/folder for which to schedule expiration
|
|
*/
|
|
private static function scheduleExpire($uid, $fileName) {
|
|
// let the admin disable auto expire
|
|
$expiration = self::getExpiration();
|
|
if ($expiration->isEnabled()) {
|
|
$command = new Expire($uid, $fileName);
|
|
\OC::$server->getCommandBus()->push($command);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Expire versions which exceed the quota.
|
|
*
|
|
* This will setup the filesystem for the given user but will not
|
|
* tear it down afterwards.
|
|
*
|
|
* @param string $filename path to file to expire
|
|
* @param string $uid user for which to expire the version
|
|
* @return bool|int|null
|
|
*/
|
|
public static function expire($filename, $uid) {
|
|
$expiration = self::getExpiration();
|
|
|
|
if ($expiration->isEnabled()) {
|
|
// get available disk space for user
|
|
$user = \OC::$server->getUserManager()->get($uid);
|
|
if (is_null($user)) {
|
|
\OCP\Util::writeLog('files_versions', 'Backends provided no user object for ' . $uid, \OCP\Util::ERROR);
|
|
throw new \OC\User\NoUserException('Backends provided no user object for ' . $uid);
|
|
}
|
|
|
|
\OC_Util::setupFS($uid);
|
|
|
|
if (!Filesystem::file_exists($filename)) {
|
|
return false;
|
|
}
|
|
|
|
if (empty($filename)) {
|
|
// file maybe renamed or deleted
|
|
return false;
|
|
}
|
|
$versionsFileview = new View('/'.$uid.'/files_versions');
|
|
|
|
$softQuota = true;
|
|
$quota = $user->getQuota();
|
|
if ( $quota === null || $quota === 'none' ) {
|
|
$quota = Filesystem::free_space('/');
|
|
$softQuota = false;
|
|
} else {
|
|
$quota = \OCP\Util::computerFileSize($quota);
|
|
}
|
|
|
|
// make sure that we have the current size of the version history
|
|
$versionsSize = self::getVersionsSize($uid);
|
|
|
|
// calculate available space for version history
|
|
// subtract size of files and current versions size from quota
|
|
if ($quota >= 0) {
|
|
if ($softQuota) {
|
|
$files_view = new View('/' . $uid . '/files');
|
|
$rootInfo = $files_view->getFileInfo('/', false);
|
|
$free = $quota - $rootInfo['size']; // remaining free space for user
|
|
if ($free > 0) {
|
|
$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
|
|
} else {
|
|
$availableSpace = $free - $versionsSize;
|
|
}
|
|
} else {
|
|
$availableSpace = $quota;
|
|
}
|
|
} else {
|
|
$availableSpace = PHP_INT_MAX;
|
|
}
|
|
|
|
$allVersions = Storage::getVersions($uid, $filename);
|
|
|
|
$time = time();
|
|
list($toDelete, $sizeOfDeletedVersions) = self::getExpireList($time, $allVersions, $availableSpace <= 0);
|
|
|
|
$availableSpace = $availableSpace + $sizeOfDeletedVersions;
|
|
$versionsSize = $versionsSize - $sizeOfDeletedVersions;
|
|
|
|
// if still not enough free space we rearrange the versions from all files
|
|
if ($availableSpace <= 0) {
|
|
$result = Storage::getAllVersions($uid);
|
|
$allVersions = $result['all'];
|
|
|
|
foreach ($result['by_file'] as $versions) {
|
|
list($toDeleteNew, $size) = self::getExpireList($time, $versions, $availableSpace <= 0);
|
|
$toDelete = array_merge($toDelete, $toDeleteNew);
|
|
$sizeOfDeletedVersions += $size;
|
|
}
|
|
$availableSpace = $availableSpace + $sizeOfDeletedVersions;
|
|
$versionsSize = $versionsSize - $sizeOfDeletedVersions;
|
|
}
|
|
|
|
foreach($toDelete as $key => $path) {
|
|
\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
|
|
self::deleteVersion($versionsFileview, $path);
|
|
\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $path, 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
|
|
unset($allVersions[$key]); // update array with the versions we keep
|
|
\OCP\Util::writeLog('files_versions', "Expire: " . $path, \OCP\Util::INFO);
|
|
}
|
|
|
|
// Check if enough space is available after versions are rearranged.
|
|
// If not we delete the oldest versions until we meet the size limit for versions,
|
|
// but always keep the two latest versions
|
|
$numOfVersions = count($allVersions) -2 ;
|
|
$i = 0;
|
|
// sort oldest first and make sure that we start at the first element
|
|
ksort($allVersions);
|
|
reset($allVersions);
|
|
while ($availableSpace < 0 && $i < $numOfVersions) {
|
|
$version = current($allVersions);
|
|
\OC_Hook::emit('\OCP\Versions', 'preDelete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
|
|
self::deleteVersion($versionsFileview, $version['path'] . '.v' . $version['version']);
|
|
\OC_Hook::emit('\OCP\Versions', 'delete', array('path' => $version['path'].'.v'.$version['version'], 'trigger' => self::DELETE_TRIGGER_QUOTA_EXCEEDED));
|
|
\OCP\Util::writeLog('files_versions', 'running out of space! Delete oldest version: ' . $version['path'].'.v'.$version['version'] , \OCP\Util::INFO);
|
|
$versionsSize -= $version['size'];
|
|
$availableSpace += $version['size'];
|
|
next($allVersions);
|
|
$i++;
|
|
}
|
|
|
|
return $versionsSize; // finally return the new size of the version history
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Create recursively missing directories inside of files_versions
|
|
* that match the given path to a file.
|
|
*
|
|
* @param string $filename $path to a file, relative to the user's
|
|
* "files" folder
|
|
* @param View $view view on data/user/
|
|
*/
|
|
private static function createMissingDirectories($filename, $view) {
|
|
$dirname = Filesystem::normalizePath(dirname($filename));
|
|
$dirParts = explode('/', $dirname);
|
|
$dir = "/files_versions";
|
|
foreach ($dirParts as $part) {
|
|
$dir = $dir . '/' . $part;
|
|
if (!$view->file_exists($dir)) {
|
|
$view->mkdir($dir);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Static workaround
|
|
* @return Expiration
|
|
*/
|
|
protected static function getExpiration(){
|
|
if (is_null(self::$application)) {
|
|
self::$application = new Application();
|
|
}
|
|
return self::$application->getContainer()->query('Expiration');
|
|
}
|
|
|
|
}
|