nextcloud/lib/private/files/storage/common.php

356 lines
7.9 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;
/**
* 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 $permissioncache;
protected $watcher;
protected $storageCache;
public function __construct($parameters) {
}
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) {
return $this->isUpdatable($path);
}
public function isSharable($path) {
return $this->isReadable($path);
}
public function getPermissions($path) {
$permissions = 0;
if ($this->isCreatable($path)) {
$permissions |= \OCP\PERMISSION_CREATE;
}
if ($this->isReadable($path)) {
$permissions |= \OCP\PERMISSION_READ;
}
if ($this->isUpdatable($path)) {
$permissions |= \OCP\PERMISSION_UPDATE;
}
if ($this->isDeletable($path)) {
$permissions |= \OCP\PERMISSION_DELETE;
}
if ($this->isSharable($path)) {
$permissions |= \OCP\PERMISSION_SHARE;
}
return $permissions;
}
public function filemtime($path) {
$stat = $this->stat($path);
if (isset($stat['mtime'])) {
return $stat['mtime'];
} else {
return 0;
}
}
public function file_get_contents($path) {
$handle = $this->fopen($path, "r");
if (!$handle) {
return false;
}
$size = $this->filesize($path);
if ($size == 0) {
return '';
}
return fread($handle, $size);
}
public function file_put_contents($path, $data) {
$handle = $this->fopen($path, "w");
return fwrite($handle, $data);
}
public function rename($path1, $path2) {
if ($this->copy($path1, $path2)) {
return $this->unlink($path1);
} else {
return false;
}
}
public function copy($path1, $path2) {
$source = $this->fopen($path1, 'r');
$target = $this->fopen($path2, 'w');
list($count, $result) = \OC_Helper::streamCopy($source, $target);
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) {
$tmpFile = $this->getLocalFile($path);
$hash = hash($type, $tmpFile, $raw);
unlink($tmpFile);
return $hash;
}
public function search($query) {
return $this->searchInDir($query);
}
public function getLocalFile($path) {
return $this->toTmpFile($path);
}
/**
* @param string $path
*/
private function toTmpFile($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);
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));
}
}
}
return $files;
}
/**
* check if a file or folder has been updated since $time
*
* @param string $path
* @param int $time
* @return bool
*/
public function hasUpdated($path, $time) {
return $this->filemtime($path) > $time;
}
public function getCache($path = '') {
if (!isset($this->cache)) {
$this->cache = new \OC\Files\Cache\Cache($this);
}
return $this->cache;
}
public function getScanner($path = '') {
if (!isset($this->scanner)) {
$this->scanner = new \OC\Files\Cache\Scanner($this);
}
return $this->scanner;
}
public function getPermissionsCache($path = '') {
if (!isset($this->permissioncache)) {
$this->permissioncache = new \OC\Files\Cache\Permissions($this);
}
return $this->permissioncache;
}
public function getWatcher($path = '') {
if (!isset($this->watcher)) {
$this->watcher = new \OC\Files\Cache\Watcher($this);
}
return $this->watcher;
}
public function getStorageCache() {
if (!isset($this->storageCache)) {
$this->storageCache = new \OC\Files\Cache\Storage($this);
}
return $this->storageCache;
}
/**
* get the owner of a path
*
* @param string $path The path to get the owner
* @return string uid or false
*/
public function getOwner($path) {
return \OC_User::getUser();
}
/**
* get the ETag for a file or folder
*
* @param string $path
* @return string
*/
public function getETag($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 $path The path to clean
* @return string cleaned path
*/
public function cleanPath($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 $path
* @return int
*/
public function free_space($path) {
return \OC\Files\SPACE_UNKNOWN;
}
/**
* {@inheritdoc}
*/
public function isLocal() {
// the common implementation returns a temporary file by
// default, which is not local
return false;
}
}