nextcloud/lib/files/storage/common.php

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<?php
/**
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* 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;
/**
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* Storage backend class for providing common filesystem operation methods
* which are not storage-backend specific.
*
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* \OC\Files\Storage\Common is never used directly; it is extended by all other
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* storage backends, where its methods may be overridden, and additional
* (backend-specific) methods are defined.
*
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* 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 {
private $cache;
private $scanner;
private $permissioncache;
private $watcher;
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public function __construct($parameters) {
}
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public function is_dir($path) {
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return $this->filetype($path) == 'dir';
}
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public function is_file($path) {
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return $this->filetype($path) == 'file';
}
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public function filesize($path) {
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if ($this->is_dir($path)) {
return 0; //by definition
} else {
$stat = $this->stat($path);
if (isset($stat['size'])) {
return $stat['size'];
} else {
return 0;
}
}
}
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public function isCreatable($path) {
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if ($this->is_dir($path) && $this->isUpdatable($path)) {
return true;
}
return false;
}
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public function isDeletable($path) {
return $this->isUpdatable($path);
}
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public function isSharable($path) {
return $this->isReadable($path);
}
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public function getPermissions($path) {
$permissions = 0;
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if ($this->isCreatable($path)) {
$permissions |= \OCP\PERMISSION_CREATE;
}
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if ($this->isReadable($path)) {
$permissions |= \OCP\PERMISSION_READ;
}
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if ($this->isUpdatable($path)) {
$permissions |= \OCP\PERMISSION_UPDATE;
}
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if ($this->isDeletable($path)) {
$permissions |= \OCP\PERMISSION_DELETE;
}
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if ($this->isSharable($path)) {
$permissions |= \OCP\PERMISSION_SHARE;
}
return $permissions;
}
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public function filemtime($path) {
$stat = $this->stat($path);
if (isset($stat['mtime'])) {
return $stat['mtime'];
} else {
return 0;
}
}
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public function file_get_contents($path) {
$handle = $this->fopen($path, "r");
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if (!$handle) {
return false;
}
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$size = $this->filesize($path);
if ($size == 0) {
return '';
}
return fread($handle, $size);
}
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public function file_put_contents($path, $data) {
$handle = $this->fopen($path, "w");
return fwrite($handle, $data);
}
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public function rename($path1, $path2) {
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if ($this->copy($path1, $path2)) {
return $this->unlink($path1);
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} else {
return false;
}
}
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public function copy($path1, $path2) {
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$source = $this->fopen($path1, 'r');
$target = $this->fopen($path2, 'w');
list($count, $result) = \OC_Helper::streamCopy($source, $target);
return $result;
}
/**
* @brief Deletes all files and folders recursively within a directory
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* @param string $directory The directory whose contents will be deleted
* @param bool $empty Flag indicating whether directory will be emptied
* @returns bool
*
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* @note By default the directory specified by $directory will be
* deleted together with its contents. To avoid this set $empty to true
*/
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public function deleteAll($directory, $empty = false) {
$directory = trim($directory, '/');
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if (!$this->file_exists(\OCP\USER::getUser() . '/' . $directory)
|| !$this->is_dir(\OCP\USER::getUser() . '/' . $directory)
) {
return false;
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} elseif (!$this->isReadable(\OCP\USER::getUser() . '/' . $directory)) {
return false;
} else {
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$directoryHandle = $this->opendir(\OCP\USER::getUser() . '/' . $directory);
while ($contents = readdir($directoryHandle)) {
if ($contents != '.' && $contents != '..') {
$path = $directory . "/" . $contents;
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if ($this->is_dir($path)) {
$this->deleteAll($path);
} else {
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$this->unlink(\OCP\USER::getUser() . '/' . $path); // TODO: make unlink use same system path as is_dir
}
}
}
//$this->closedir( $directoryHandle ); // TODO: implement closedir in OC_FSV
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if ($empty == false) {
if (!$this->rmdir($directory)) {
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return false;
}
}
return true;
}
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}
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public function getMimeType($path) {
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if (!$this->file_exists($path)) {
return false;
}
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if ($this->is_dir($path)) {
return 'httpd/unix-directory';
}
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$source = $this->fopen($path, 'r');
if (!$source) {
return false;
}
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$head = fread($source, 8192); //8kb should suffice to determine a mimetype
if ($pos = strrpos($path, '.')) {
$extension = substr($path, $pos);
} else {
$extension = '';
}
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$tmpFile = \OC_Helper::tmpFile($extension);
file_put_contents($tmpFile, $head);
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$mime = \OC_Helper::getMimeType($tmpFile);
unlink($tmpFile);
return $mime;
}
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public function hash($type, $path, $raw = false) {
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$tmpFile = $this->getLocalFile($path);
$hash = hash($type, $tmpFile, $raw);
unlink($tmpFile);
return $hash;
}
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public function search($query) {
return $this->searchInDir($query);
}
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public function getLocalFile($path) {
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return $this->toTmpFile($path);
}
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private function toTmpFile($path) { //no longer in the storage api, still useful here
$source = $this->fopen($path, 'r');
if (!$source) {
return false;
}
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if ($pos = strrpos($path, '.')) {
$extension = substr($path, $pos);
} else {
$extension = '';
}
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$tmpFile = \OC_Helper::tmpFile($extension);
$target = fopen($tmpFile, 'w');
\OC_Helper::streamCopy($source, $target);
return $tmpFile;
}
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public function getLocalFolder($path) {
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$baseDir = \OC_Helper::tmpFolder();
$this->addLocalFolder($path, $baseDir);
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return $baseDir;
}
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private function addLocalFolder($path, $target) {
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if ($dh = $this->opendir($path)) {
while ($file = readdir($dh)) {
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 . '/' . $file);
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}
}
}
}
}
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protected function searchInDir($query, $dir = '') {
$files = array();
$dh = $this->opendir($dir);
if ($dh) {
while ($item = readdir($dh)) {
if ($item == '.' || $item == '..') continue;
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if (strstr(strtolower($item), strtolower($query)) !== false) {
$files[] = $dir . '/' . $item;
}
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if ($this->is_dir($dir . '/' . $item)) {
$files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
}
}
}
return $files;
}
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/**
* check if a file or folder has been updated since $time
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*
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* @param string $path
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* @param int $time
* @return bool
*/
public function hasUpdated($path, $time) {
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return $this->filemtime($path) > $time;
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}
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public function getCache($path = '') {
if (!isset($this->cache)) {
$this->cache = new \OC\Files\Cache\Cache($this);
}
return $this->cache;
}
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public function getScanner($path = '') {
if (!isset($this->scanner)) {
$this->scanner = new \OC\Files\Cache\Scanner($this);
}
return $this->scanner;
}
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public function getPermissionsCache($path = '') {
if (!isset($this->permissioncache)) {
$this->permissioncache = new \OC\Files\Cache\Permissions($this);
}
return $this->permissioncache;
}
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public function getWatcher($path = '') {
if (!isset($this->watcher)) {
$this->watcher = new \OC\Files\Cache\Watcher($this);
}
return $this->watcher;
}
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/**
* get the owner of a path
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*
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* @param string $path The path to get the owner
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* @return string uid or false
*/
public function getOwner($path) {
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return \OC_User::getUser();
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}
/**
* get the ETag for a file or folder
*
* @param string $path
* @return string
*/
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public function getETag($path) {
$ETagFunction = \OC_Connector_Sabre_Node::$ETagFunction;
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if ($ETagFunction) {
$hash = call_user_func($ETagFunction, $path);
return $hash;
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} else {
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return uniqid();
}
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}
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/**
* clean a path, i.e. remove all redundant '.' and '..'
* making sure that it can't point to higher than '/'
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*
* @param $path The path to clean
* @return string cleaned path
*/
public function cleanPath($path) {
if (strlen($path) == 0 or $path[0] != '/') {
$path = '/' . $path;
}
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$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
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*
* @param $path
* return int
*/
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public function free_space($path) {
return \OC\Files\FREE_SPACE_UNKNOWN;
}
}