521 lines
12 KiB
PHP
521 lines
12 KiB
PHP
<?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\Storage;
|
|
|
|
use OC\Files\Cache\Cache;
|
|
use OC\Files\Cache\Scanner;
|
|
use OC\Files\Cache\Storage;
|
|
use OC\Files\Filesystem;
|
|
use OC\Files\Cache\Watcher;
|
|
use OCP\Files\FileNameTooLongException;
|
|
use OCP\Files\InvalidCharacterInPathException;
|
|
use OCP\Files\InvalidPathException;
|
|
use OCP\Files\ReservedWordException;
|
|
|
|
/**
|
|
* Storage backend class for providing common filesystem operation methods
|
|
* which are not storage-backend specific.
|
|
*
|
|
* \OC\Files\Storage\Common is never used directly; it is extended by all other
|
|
* storage backends, where its methods may be overridden, and additional
|
|
* (backend-specific) methods are defined.
|
|
*
|
|
* Some \OC\Files\Storage\Common methods call functions which are first defined
|
|
* in classes which extend it, e.g. $this->stat() .
|
|
*/
|
|
abstract class Common implements \OC\Files\Storage\Storage {
|
|
protected $cache;
|
|
protected $scanner;
|
|
protected $watcher;
|
|
protected $storageCache;
|
|
|
|
/**
|
|
* @var string[]
|
|
*/
|
|
protected $cachedFiles = array();
|
|
|
|
public function __construct($parameters) {
|
|
}
|
|
|
|
/**
|
|
* Remove a file or folder
|
|
*
|
|
* @param string $path
|
|
* @return bool
|
|
*/
|
|
protected function remove($path) {
|
|
if ($this->is_dir($path)) {
|
|
return $this->rmdir($path);
|
|
} else if ($this->is_file($path)) {
|
|
return $this->unlink($path);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public function is_dir($path) {
|
|
return $this->filetype($path) === 'dir';
|
|
}
|
|
|
|
public function is_file($path) {
|
|
return $this->filetype($path) === 'file';
|
|
}
|
|
|
|
public function filesize($path) {
|
|
if ($this->is_dir($path)) {
|
|
return 0; //by definition
|
|
} else {
|
|
$stat = $this->stat($path);
|
|
if (isset($stat['size'])) {
|
|
return $stat['size'];
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
public function isReadable($path) {
|
|
// at least check whether it exists
|
|
// subclasses might want to implement this more thoroughly
|
|
return $this->file_exists($path);
|
|
}
|
|
|
|
public function isUpdatable($path) {
|
|
// at least check whether it exists
|
|
// subclasses might want to implement this more thoroughly
|
|
// a non-existing file/folder isn't updatable
|
|
return $this->file_exists($path);
|
|
}
|
|
|
|
public function isCreatable($path) {
|
|
if ($this->is_dir($path) && $this->isUpdatable($path)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public function isDeletable($path) {
|
|
if ($path === '' || $path === '/') {
|
|
return false;
|
|
}
|
|
$parent = dirname($path);
|
|
return $this->isUpdatable($parent) && $this->isUpdatable($path);
|
|
}
|
|
|
|
public function isSharable($path) {
|
|
if (\OC_Util::isSharingDisabledForUser()) {
|
|
return false;
|
|
}
|
|
|
|
return $this->isReadable($path);
|
|
}
|
|
|
|
public function getPermissions($path) {
|
|
$permissions = 0;
|
|
if ($this->isCreatable($path)) {
|
|
$permissions |= \OCP\Constants::PERMISSION_CREATE;
|
|
}
|
|
if ($this->isReadable($path)) {
|
|
$permissions |= \OCP\Constants::PERMISSION_READ;
|
|
}
|
|
if ($this->isUpdatable($path)) {
|
|
$permissions |= \OCP\Constants::PERMISSION_UPDATE;
|
|
}
|
|
if ($this->isDeletable($path)) {
|
|
$permissions |= \OCP\Constants::PERMISSION_DELETE;
|
|
}
|
|
if ($this->isSharable($path)) {
|
|
$permissions |= \OCP\Constants::PERMISSION_SHARE;
|
|
}
|
|
return $permissions;
|
|
}
|
|
|
|
public function filemtime($path) {
|
|
$stat = $this->stat($path);
|
|
if (isset($stat['mtime']) && $stat['mtime'] > 0) {
|
|
return $stat['mtime'];
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
public function file_get_contents($path) {
|
|
$handle = $this->fopen($path, "r");
|
|
if (!$handle) {
|
|
return false;
|
|
}
|
|
$data = stream_get_contents($handle);
|
|
fclose($handle);
|
|
return $data;
|
|
}
|
|
|
|
public function file_put_contents($path, $data) {
|
|
$handle = $this->fopen($path, "w");
|
|
$this->removeCachedFile($path);
|
|
$count = fwrite($handle, $data);
|
|
fclose($handle);
|
|
return $count;
|
|
}
|
|
|
|
public function rename($path1, $path2) {
|
|
$this->remove($path2);
|
|
|
|
$this->removeCachedFile($path1);
|
|
return $this->copy($path1, $path2) and $this->remove($path1);
|
|
}
|
|
|
|
public function copy($path1, $path2) {
|
|
if ($this->is_dir($path1)) {
|
|
$this->remove($path2);
|
|
$dir = $this->opendir($path1);
|
|
$this->mkdir($path2);
|
|
while ($file = readdir($dir)) {
|
|
if (!Filesystem::isIgnoredDir($file)) {
|
|
if (!$this->copy($path1 . '/' . $file, $path2 . '/' . $file)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
closedir($dir);
|
|
return true;
|
|
} else {
|
|
$source = $this->fopen($path1, 'r');
|
|
$target = $this->fopen($path2, 'w');
|
|
list(, $result) = \OC_Helper::streamCopy($source, $target);
|
|
$this->removeCachedFile($path2);
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
public function getMimeType($path) {
|
|
if ($this->is_dir($path)) {
|
|
return 'httpd/unix-directory';
|
|
} elseif ($this->file_exists($path)) {
|
|
return \OC_Helper::getFileNameMimeType($path);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public function hash($type, $path, $raw = false) {
|
|
$fh = $this->fopen($path, 'rb');
|
|
$ctx = hash_init($type);
|
|
hash_update_stream($ctx, $fh);
|
|
fclose($fh);
|
|
return hash_final($ctx, $raw);
|
|
}
|
|
|
|
public function search($query) {
|
|
return $this->searchInDir($query);
|
|
}
|
|
|
|
public function getLocalFile($path) {
|
|
return $this->getCachedFile($path);
|
|
}
|
|
|
|
/**
|
|
* @param string $path
|
|
* @return string
|
|
*/
|
|
protected function toTmpFile($path) { //no longer in the storage api, still useful here
|
|
$source = $this->fopen($path, 'r');
|
|
if (!$source) {
|
|
return false;
|
|
}
|
|
if ($pos = strrpos($path, '.')) {
|
|
$extension = substr($path, $pos);
|
|
} else {
|
|
$extension = '';
|
|
}
|
|
$tmpFile = \OC_Helper::tmpFile($extension);
|
|
$target = fopen($tmpFile, 'w');
|
|
\OC_Helper::streamCopy($source, $target);
|
|
fclose($target);
|
|
return $tmpFile;
|
|
}
|
|
|
|
public function getLocalFolder($path) {
|
|
$baseDir = \OC_Helper::tmpFolder();
|
|
$this->addLocalFolder($path, $baseDir);
|
|
return $baseDir;
|
|
}
|
|
|
|
/**
|
|
* @param string $path
|
|
* @param string $target
|
|
*/
|
|
private function addLocalFolder($path, $target) {
|
|
$dh = $this->opendir($path);
|
|
if (is_resource($dh)) {
|
|
while (($file = readdir($dh)) !== false) {
|
|
if ($file !== '.' and $file !== '..') {
|
|
if ($this->is_dir($path . '/' . $file)) {
|
|
mkdir($target . '/' . $file);
|
|
$this->addLocalFolder($path . '/' . $file, $target . '/' . $file);
|
|
} else {
|
|
$tmp = $this->toTmpFile($path . '/' . $file);
|
|
rename($tmp, $target . '/' . $file);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $query
|
|
*/
|
|
protected function searchInDir($query, $dir = '') {
|
|
$files = array();
|
|
$dh = $this->opendir($dir);
|
|
if (is_resource($dh)) {
|
|
while (($item = readdir($dh)) !== false) {
|
|
if ($item == '.' || $item == '..') continue;
|
|
if (strstr(strtolower($item), strtolower($query)) !== false) {
|
|
$files[] = $dir . '/' . $item;
|
|
}
|
|
if ($this->is_dir($dir . '/' . $item)) {
|
|
$files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
|
|
}
|
|
}
|
|
}
|
|
closedir($dh);
|
|
return $files;
|
|
}
|
|
|
|
/**
|
|
* check if a file or folder has been updated since $time
|
|
*
|
|
* The method is only used to check if the cache needs to be updated. Storage backends that don't support checking
|
|
* the mtime should always return false here. As a result storage implementations that always return false expect
|
|
* exclusive access to the backend and will not pick up files that have been added in a way that circumvents
|
|
* ownClouds filesystem.
|
|
*
|
|
* @param string $path
|
|
* @param int $time
|
|
* @return bool
|
|
*/
|
|
public function hasUpdated($path, $time) {
|
|
return $this->filemtime($path) > $time;
|
|
}
|
|
|
|
public function getCache($path = '', $storage = null) {
|
|
if (!$storage) {
|
|
$storage = $this;
|
|
}
|
|
if (!isset($this->cache)) {
|
|
$this->cache = new Cache($storage);
|
|
}
|
|
return $this->cache;
|
|
}
|
|
|
|
public function getScanner($path = '', $storage = null) {
|
|
if (!$storage) {
|
|
$storage = $this;
|
|
}
|
|
if (!isset($this->scanner)) {
|
|
$this->scanner = new Scanner($storage);
|
|
}
|
|
return $this->scanner;
|
|
}
|
|
|
|
public function getWatcher($path = '', $storage = null) {
|
|
if (!$storage) {
|
|
$storage = $this;
|
|
}
|
|
if (!isset($this->watcher)) {
|
|
$this->watcher = new Watcher($storage);
|
|
$this->watcher->setPolicy(\OC::$server->getConfig()->getSystemValue('filesystem_check_changes', Watcher::CHECK_ONCE));
|
|
}
|
|
return $this->watcher;
|
|
}
|
|
|
|
public function getStorageCache($storage = null) {
|
|
if (!$storage) {
|
|
$storage = $this;
|
|
}
|
|
if (!isset($this->storageCache)) {
|
|
$this->storageCache = new Storage($storage);
|
|
}
|
|
return $this->storageCache;
|
|
}
|
|
|
|
/**
|
|
* get the owner of a path
|
|
*
|
|
* @param string $path The path to get the owner
|
|
* @return string|false uid or false
|
|
*/
|
|
public function getOwner($path) {
|
|
return \OC_User::getUser();
|
|
}
|
|
|
|
/**
|
|
* get the ETag for a file or folder
|
|
*
|
|
* @param string $path
|
|
* @return string|false
|
|
*/
|
|
public function getETag($path) {
|
|
$ETagFunction = \OC\Connector\Sabre\Node::$ETagFunction;
|
|
if ($ETagFunction) {
|
|
$hash = call_user_func($ETagFunction, $path);
|
|
return $hash;
|
|
} else {
|
|
return uniqid();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* clean a path, i.e. remove all redundant '.' and '..'
|
|
* making sure that it can't point to higher than '/'
|
|
*
|
|
* @param string $path The path to clean
|
|
* @return string cleaned path
|
|
*/
|
|
public function cleanPath($path) {
|
|
if (strlen($path) == 0 or $path[0] != '/') {
|
|
$path = '/' . $path;
|
|
}
|
|
|
|
$output = array();
|
|
foreach (explode('/', $path) as $chunk) {
|
|
if ($chunk == '..') {
|
|
array_pop($output);
|
|
} else if ($chunk == '.') {
|
|
} else {
|
|
$output[] = $chunk;
|
|
}
|
|
}
|
|
return implode('/', $output);
|
|
}
|
|
|
|
public function test() {
|
|
if ($this->stat('')) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* get the free space in the storage
|
|
*
|
|
* @param string $path
|
|
* @return int|false
|
|
*/
|
|
public function free_space($path) {
|
|
return \OCP\Files\FileInfo::SPACE_UNKNOWN;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function isLocal() {
|
|
// the common implementation returns a temporary file by
|
|
// default, which is not local
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string $path
|
|
*/
|
|
protected function getCachedFile($path) {
|
|
if (!isset($this->cachedFiles[$path])) {
|
|
$this->cachedFiles[$path] = $this->toTmpFile($path);
|
|
}
|
|
return $this->cachedFiles[$path];
|
|
}
|
|
|
|
protected function removeCachedFile($path) {
|
|
unset($this->cachedFiles[$path]);
|
|
}
|
|
|
|
/**
|
|
* Check if the storage is an instance of $class or is a wrapper for a storage that is an instance of $class
|
|
*
|
|
* @param string $class
|
|
* @return bool
|
|
*/
|
|
public function instanceOfStorage($class) {
|
|
return is_a($this, $class);
|
|
}
|
|
|
|
/**
|
|
* A custom storage implementation can return an url for direct download of a give file.
|
|
*
|
|
* For now the returned array can hold the parameter url - in future more attributes might follow.
|
|
*
|
|
* @param string $path
|
|
* @return array|false
|
|
*/
|
|
public function getDirectDownload($path) {
|
|
return [];
|
|
}
|
|
|
|
/**
|
|
* @inheritdoc
|
|
*/
|
|
public function verifyPath($path, $fileName) {
|
|
if (isset($fileName[255])) {
|
|
throw new FileNameTooLongException();
|
|
}
|
|
|
|
// NOTE: $path will remain unverified for now
|
|
if (\OC_Util::runningOnWindows()) {
|
|
$this->verifyWindowsPath($fileName);
|
|
} else {
|
|
$this->verifyPosixPath($fileName);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx
|
|
* @param string $fileName
|
|
* @throws InvalidPathException
|
|
*/
|
|
protected function verifyWindowsPath($fileName) {
|
|
$fileName = trim($fileName);
|
|
$this->scanForInvalidCharacters($fileName, "\\/<>:\"|?*");
|
|
$reservedNames = ['CON', 'PRN', 'AUX', 'NUL', 'COM1', 'COM2', 'COM3', 'COM4', 'COM5', 'COM6', 'COM7', 'COM8', 'COM9', 'LPT1', 'LPT2', 'LPT3', 'LPT4', 'LPT5', 'LPT6', 'LPT7', 'LPT8', 'LPT9'];
|
|
if (in_array(strtoupper($fileName), $reservedNames)) {
|
|
throw new ReservedWordException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $fileName
|
|
* @throws InvalidPathException
|
|
*/
|
|
protected function verifyPosixPath($fileName) {
|
|
$fileName = trim($fileName);
|
|
$this->scanForInvalidCharacters($fileName, "\\/");
|
|
$reservedNames = ['*'];
|
|
if (in_array($fileName, $reservedNames)) {
|
|
throw new ReservedWordException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $fileName
|
|
* @param string $invalidChars
|
|
* @throws InvalidPathException
|
|
*/
|
|
private function scanForInvalidCharacters($fileName, $invalidChars) {
|
|
foreach(str_split($invalidChars) as $char) {
|
|
if (strpos($fileName, $char) !== false) {
|
|
throw new InvalidCharacterInPathException();
|
|
}
|
|
}
|
|
|
|
$sanitizedFileName = filter_var($fileName, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW);
|
|
if($sanitizedFileName !== $fileName) {
|
|
throw new InvalidCharacterInPathException();
|
|
}
|
|
}
|
|
}
|