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296 lines
9.6 KiB
296 lines
9.6 KiB
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Blaok <i@blaok.me>
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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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 Olivier Paroz <github@oparoz.com>
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* @author Robin Appelman <robin@icewind.nl>
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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 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 OC\Files\Utils;
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use OC\Files\Cache\Cache;
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use OC\Files\Filesystem;
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use OC\Files\Storage\FailedStorage;
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use OC\ForbiddenException;
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use OC\Hooks\PublicEmitter;
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use OC\Lock\DBLockingProvider;
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use OCA\Files_Sharing\SharedStorage;
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use OCP\EventDispatcher\IEventDispatcher;
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use OCP\Files\Events\BeforeFileScannedEvent;
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use OCP\Files\Events\BeforeFolderScannedEvent;
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use OCP\Files\Events\NodeAddedToCache;
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use OCP\Files\Events\FileCacheUpdated;
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use OCP\Files\Events\NodeRemovedFromCache;
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use OCP\Files\Events\FileScannedEvent;
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use OCP\Files\Events\FolderScannedEvent;
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use OCP\Files\NotFoundException;
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use OCP\Files\Storage\IStorage;
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use OCP\Files\StorageNotAvailableException;
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use OCP\IDBConnection;
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use OCP\ILogger;
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/**
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* Class Scanner
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*
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* Hooks available in scope \OC\Utils\Scanner
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* - scanFile(string $absolutePath)
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* - scanFolder(string $absolutePath)
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*
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* @package OC\Files\Utils
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*/
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class Scanner extends PublicEmitter {
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public const MAX_ENTRIES_TO_COMMIT = 10000;
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/** @var string $user */
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private $user;
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/** @var IDBConnection */
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protected $db;
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/** @var IEventDispatcher */
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private $dispatcher;
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/** @var ILogger */
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protected $logger;
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/**
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* Whether to use a DB transaction
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*
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* @var bool
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*/
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protected $useTransaction;
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/**
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* Number of entries scanned to commit
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*
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* @var int
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*/
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protected $entriesToCommit;
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/**
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* @param string $user
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* @param IDBConnection|null $db
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* @param IEventDispatcher $dispatcher
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* @param ILogger $logger
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*/
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public function __construct($user, $db, IEventDispatcher $dispatcher, ILogger $logger) {
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$this->user = $user;
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$this->db = $db;
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$this->dispatcher = $dispatcher;
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$this->logger = $logger;
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// when DB locking is used, no DB transactions will be used
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$this->useTransaction = !(\OC::$server->getLockingProvider() instanceof DBLockingProvider);
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}
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/**
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* get all storages for $dir
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*
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* @param string $dir
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* @return \OC\Files\Mount\MountPoint[]
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*/
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protected function getMounts($dir) {
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//TODO: move to the node based fileapi once that's done
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\OC_Util::tearDownFS();
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\OC_Util::setupFS($this->user);
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$mountManager = Filesystem::getMountManager();
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$mounts = $mountManager->findIn($dir);
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$mounts[] = $mountManager->find($dir);
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$mounts = array_reverse($mounts); //start with the mount of $dir
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return $mounts;
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}
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/**
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* attach listeners to the scanner
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*
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* @param \OC\Files\Mount\MountPoint $mount
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*/
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protected function attachListener($mount) {
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$scanner = $mount->getStorage()->getScanner();
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$scanner->listen('\OC\Files\Cache\Scanner', 'scanFile', function ($path) use ($mount) {
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$this->emit('\OC\Files\Utils\Scanner', 'scanFile', [$mount->getMountPoint() . $path]);
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$this->dispatcher->dispatchTyped(new BeforeFileScannedEvent($mount->getMountPoint() . $path));
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'scanFolder', function ($path) use ($mount) {
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$this->emit('\OC\Files\Utils\Scanner', 'scanFolder', [$mount->getMountPoint() . $path]);
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$this->dispatcher->dispatchTyped(new BeforeFolderScannedEvent($mount->getMountPoint() . $path));
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'postScanFile', function ($path) use ($mount) {
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$this->emit('\OC\Files\Utils\Scanner', 'postScanFile', [$mount->getMountPoint() . $path]);
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$this->dispatcher->dispatchTyped(new FileScannedEvent($mount->getMountPoint() . $path));
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'postScanFolder', function ($path) use ($mount) {
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$this->emit('\OC\Files\Utils\Scanner', 'postScanFolder', [$mount->getMountPoint() . $path]);
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$this->dispatcher->dispatchTyped(new FolderScannedEvent($mount->getMountPoint() . $path));
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});
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}
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/**
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* @param string $dir
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*/
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public function backgroundScan($dir) {
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$mounts = $this->getMounts($dir);
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foreach ($mounts as $mount) {
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$storage = $mount->getStorage();
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if (is_null($storage)) {
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continue;
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}
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// don't bother scanning failed storages (shortcut for same result)
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if ($storage->instanceOfStorage(FailedStorage::class)) {
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continue;
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}
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// don't scan received local shares, these can be scanned when scanning the owner's storage
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if ($storage->instanceOfStorage(SharedStorage::class)) {
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continue;
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}
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$scanner = $storage->getScanner();
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$this->attachListener($mount);
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$scanner->listen('\OC\Files\Cache\Scanner', 'removeFromCache', function ($path) use ($storage) {
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$this->triggerPropagator($storage, $path);
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'updateCache', function ($path) use ($storage) {
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$this->triggerPropagator($storage, $path);
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'addToCache', function ($path) use ($storage) {
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$this->triggerPropagator($storage, $path);
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});
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$propagator = $storage->getPropagator();
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$propagator->beginBatch();
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$scanner->backgroundScan();
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$propagator->commitBatch();
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}
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}
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/**
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* @param string $dir
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* @param $recursive
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* @param callable|null $mountFilter
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* @throws ForbiddenException
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* @throws NotFoundException
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*/
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public function scan($dir = '', $recursive = \OC\Files\Cache\Scanner::SCAN_RECURSIVE, callable $mountFilter = null) {
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if (!Filesystem::isValidPath($dir)) {
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throw new \InvalidArgumentException('Invalid path to scan');
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}
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$mounts = $this->getMounts($dir);
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foreach ($mounts as $mount) {
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if ($mountFilter && !$mountFilter($mount)) {
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continue;
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}
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$storage = $mount->getStorage();
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if (is_null($storage)) {
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continue;
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}
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// don't bother scanning failed storages (shortcut for same result)
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if ($storage->instanceOfStorage(FailedStorage::class)) {
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continue;
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}
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// if the home storage isn't writable then the scanner is run as the wrong user
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if ($storage->instanceOfStorage('\OC\Files\Storage\Home') and
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(!$storage->isCreatable('') or !$storage->isCreatable('files'))
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) {
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if ($storage->file_exists('') or $storage->getCache()->inCache('')) {
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throw new ForbiddenException();
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} else {// if the root exists in neither the cache nor the storage the user isn't setup yet
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break;
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}
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}
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// don't scan received local shares, these can be scanned when scanning the owner's storage
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if ($storage->instanceOfStorage(SharedStorage::class)) {
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continue;
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}
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$relativePath = $mount->getInternalPath($dir);
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$scanner = $storage->getScanner();
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$scanner->setUseTransactions(false);
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$this->attachListener($mount);
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$scanner->listen('\OC\Files\Cache\Scanner', 'removeFromCache', function ($path) use ($storage) {
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$this->postProcessEntry($storage, $path);
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$this->dispatcher->dispatchTyped(new NodeRemovedFromCache($storage, $path));
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'updateCache', function ($path) use ($storage) {
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$this->postProcessEntry($storage, $path);
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$this->dispatcher->dispatchTyped(new FileCacheUpdated($storage, $path));
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});
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$scanner->listen('\OC\Files\Cache\Scanner', 'addToCache', function ($path) use ($storage) {
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$this->postProcessEntry($storage, $path);
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$this->dispatcher->dispatchTyped(new NodeAddedToCache($storage, $path));
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});
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if (!$storage->file_exists($relativePath)) {
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throw new NotFoundException($dir);
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}
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if ($this->useTransaction) {
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$this->db->beginTransaction();
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}
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try {
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$propagator = $storage->getPropagator();
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$propagator->beginBatch();
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$scanner->scan($relativePath, $recursive, \OC\Files\Cache\Scanner::REUSE_ETAG | \OC\Files\Cache\Scanner::REUSE_SIZE);
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$cache = $storage->getCache();
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if ($cache instanceof Cache) {
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// only re-calculate for the root folder we scanned, anything below that is taken care of by the scanner
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$cache->correctFolderSize($relativePath);
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}
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$propagator->commitBatch();
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} catch (StorageNotAvailableException $e) {
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$this->logger->error('Storage ' . $storage->getId() . ' not available');
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$this->logger->logException($e);
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$this->emit('\OC\Files\Utils\Scanner', 'StorageNotAvailable', [$e]);
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}
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if ($this->useTransaction) {
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$this->db->commit();
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}
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}
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}
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private function triggerPropagator(IStorage $storage, $internalPath) {
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$storage->getPropagator()->propagateChange($internalPath, time());
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}
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private function postProcessEntry(IStorage $storage, $internalPath) {
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$this->triggerPropagator($storage, $internalPath);
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if ($this->useTransaction) {
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$this->entriesToCommit++;
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if ($this->entriesToCommit >= self::MAX_ENTRIES_TO_COMMIT) {
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$propagator = $storage->getPropagator();
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$this->entriesToCommit = 0;
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$this->db->commit();
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$propagator->commitBatch();
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$this->db->beginTransaction();
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$propagator->beginBatch();
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}
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}
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}
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}
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