187 lines
4.8 KiB
PHP
187 lines
4.8 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\Files\Cache;
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class Scanner {
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/**
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* @var \OC\Files\Storage\Storage $storage
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*/
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private $storage;
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/**
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* @var string $storageId
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*/
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private $storageId;
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/**
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* @var \OC\Files\Cache\Cache $cache
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*/
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private $cache;
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const SCAN_RECURSIVE = true;
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const SCAN_SHALLOW = false;
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public function __construct(\OC\Files\Storage\Storage $storage) {
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$this->storage = $storage;
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$this->storageId = $this->storage->getId();
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$this->cache = $storage->getCache();
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}
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/**
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* get all the metadata of a file or folder
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* *
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*
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* @param string $path
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* @return array with metadata of the file
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*/
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public function getData($path) {
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$data = array();
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if (!$this->storage->isReadable($path)) return null; //cant read, nothing we can do
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$data['mimetype'] = $this->storage->getMimeType($path);
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$data['mtime'] = $this->storage->filemtime($path);
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if ($data['mimetype'] == 'httpd/unix-directory') {
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$data['size'] = -1; //unknown
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} else {
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$data['size'] = $this->storage->filesize($path);
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}
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$data['etag'] = $this->storage->getETag($path);
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return $data;
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}
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/**
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* scan a single file and store it in the cache
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*
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* @param string $file
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* @param bool $checkExisting check existing folder sizes in the cache instead of always using -1 for folder size
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* @return array with metadata of the scanned file
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*/
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public function scanFile($file, $checkExisting = false) {
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if ( ! self::isPartialFile($file)
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and ! \OC\Files\Filesystem::isFileBlacklisted($file)
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) {
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\OC_Hook::emit('\OC\Files\Cache\Scanner', 'scan_file', array('path' => $file, 'storage' => $this->storageId));
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$data = $this->getData($file);
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if ($data) {
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if ($file) {
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$parent = dirname($file);
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if ($parent === '.' or $parent === '/') {
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$parent = '';
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}
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if (!$this->cache->inCache($parent)) {
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$this->scanFile($parent);
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}
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}
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if($cacheData = $this->cache->get($file)) {
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if ($data['mtime'] === $cacheData['mtime'] &&
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$data['size'] === $cacheData['size']) {
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$data['etag'] = $cacheData['etag'];
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}
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}
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if ($checkExisting and $cacheData) {
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if ($data['size'] === -1) {
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$data['size'] = $cacheData['size'];
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}
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}
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$this->cache->put($file, $data);
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}
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return $data;
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}
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return null;
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}
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/**
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* scan all the files in a folder and store them in the cache
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*
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* @param string $path
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* @param bool $recursive
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* @param bool $onlyChilds
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* @return int the size of the scanned folder or -1 if the size is unknown at this stage
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*/
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public function scan($path, $recursive = self::SCAN_RECURSIVE, $onlyChilds = false) {
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\OC_Hook::emit('\OC\Files\Cache\Scanner', 'scan_folder', array('path' => $path, 'storage' => $this->storageId));
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$childQueue = array();
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if (!$onlyChilds) {
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$this->scanFile($path);
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}
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$size = 0;
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if ($this->storage->is_dir($path) && ($dh = $this->storage->opendir($path))) {
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\OC_DB::beginTransaction();
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while ($file = readdir($dh)) {
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$child = ($path) ? $path . '/' . $file : $file;
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if (!$this->isIgnoredDir($file)) {
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$data = $this->scanFile($child, $recursive === self::SCAN_SHALLOW);
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if ($data) {
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if ($data['size'] === -1) {
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if ($recursive === self::SCAN_RECURSIVE) {
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$childQueue[] = $child;
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$data['size'] = 0;
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} else {
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$size = -1;
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}
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}
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if ($size !== -1) {
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$size += $data['size'];
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}
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}
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}
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}
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\OC_DB::commit();
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foreach ($childQueue as $child) {
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$childSize = $this->scan($child, self::SCAN_RECURSIVE, true);
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if ($childSize === -1) {
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$size = -1;
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} else {
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$size += $childSize;
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}
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}
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if ($size !== -1) {
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$this->cache->put($path, array('size' => $size));
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}
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}
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return $size;
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}
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/**
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* @brief check if the directory should be ignored when scanning
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* NOTE: the special directories . and .. would cause never ending recursion
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* @param String $dir
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* @return boolean
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*/
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private function isIgnoredDir($dir) {
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if ($dir === '.' || $dir === '..') {
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return true;
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}
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return false;
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}
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/**
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* @brief check if the file should be ignored when scanning
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* NOTE: files with a '.part' extension are ignored as well!
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* prevents unfinished put requests to be scanned
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* @param String $file
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* @return boolean
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*/
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public static function isPartialFile($file) {
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if (pathinfo($file, PATHINFO_EXTENSION) === 'part') {
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return true;
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}
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return false;
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}
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/**
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* walk over any folders that are not fully scanned yet and scan them
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*/
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public function backgroundScan() {
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while (($path = $this->cache->getIncomplete()) !== false) {
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$this->scan($path);
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$this->cache->correctFolderSize($path);
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}
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}
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}
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