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