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filesystem.php
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Bart Visscher authoredBart Visscher authored
filesystem.php 16.72 KiB
<?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.
*/
/**
* Class for abstraction of filesystem functions
* This class won't call any filesystem functions for itself but but will pass them to the correct OC_Filestorage object
* this class should also handle all the file permission related stuff
*
* Hooks provided:
* read(path)
* write(path, &run)
* post_write(path)
* create(path, &run) (when a file is created, both create and write will be emitted in that order)
* post_create(path)
* delete(path, &run)
* post_delete(path)
* rename(oldpath,newpath, &run)
* post_rename(oldpath,newpath)
* copy(oldpath,newpath, &run) (if the newpath doesn't exists yes, copy, create and write will be emitted in that order)
* post_rename(oldpath,newpath)
*
* the &run parameter can be set to false to prevent the operation from occurring
*/
namespace OC\Files;
const FREE_SPACE_UNKNOWN = -2;
const FREE_SPACE_UNLIMITED = -3;
class Filesystem {
public static $loaded = false;
/**
* @var \OC\Files\View $defaultInstance
*/
static private $defaultInstance;
/**
* classname which used for hooks handling
* used as signalclass in OC_Hooks::emit()
*/
const CLASSNAME = 'OC_Filesystem';
/**
* signalname emitted before file renaming
*
* @param string $oldpath
* @param string $newpath
*/
const signal_rename = 'rename';
/**
* signal emitted after file renaming
*
* @param string $oldpath
* @param string $newpath
*/
const signal_post_rename = 'post_rename';
/**
* signal emitted before file/dir creation
*
* @param string $path
* @param bool $run changing this flag to false in hook handler will cancel event
*/ const signal_create = 'create';
/**
* signal emitted after file/dir creation
*
* @param string $path
* @param bool $run changing this flag to false in hook handler will cancel event
*/
const signal_post_create = 'post_create';
/**
* signal emits before file/dir copy
*
* @param string $oldpath
* @param string $newpath
* @param bool $run changing this flag to false in hook handler will cancel event
*/
const signal_copy = 'copy';
/**
* signal emits after file/dir copy
*
* @param string $oldpath
* @param string $newpath
*/
const signal_post_copy = 'post_copy';
/**
* signal emits before file/dir save
*
* @param string $path
* @param bool $run changing this flag to false in hook handler will cancel event
*/
const signal_write = 'write';
/**
* signal emits after file/dir save
*
* @param string $path
*/
const signal_post_write = 'post_write';
/**
* signal emits when reading file/dir
*
* @param string $path
*/
const signal_read = 'read';
/**
* signal emits when removing file/dir
*
* @param string $path
*/
const signal_delete = 'delete';
/**
* parameters definitions for signals
*/
const signal_param_path = 'path';
const signal_param_oldpath = 'oldpath';
const signal_param_newpath = 'newpath';
/**
* run - changing this flag to false in hook handler will cancel event
*/
const signal_param_run = 'run';
/**
* get the mountpoint of the storage object for a path * ( note: because a storage is not always mounted inside the fakeroot, the
* returned mountpoint is relative to the absolute root of the filesystem
* and doesn't take the chroot into account )
*
* @param string $path
* @return string
*/
static public function getMountPoint($path) {
$mount = Mount::find($path);
if ($mount) {
return $mount->getMountPoint();
} else {
return '';
}
}
/**
* get a list of all mount points in a directory
*
* @param string $path
* @return string[]
*/
static public function getMountPoints($path) {
$result = array();
$mounts = Mount::findIn($path);
foreach ($mounts as $mount) {
$result[] = $mount->getMountPoint();
}
return $result;
}
/**
* get the storage mounted at $mountPoint
*
* @param string $mountPoint
* @return \OC\Files\Storage\Storage
*/
public static function getStorage($mountPoint) {
$mount = Mount::find($mountPoint);
return $mount->getStorage();
}
/**
* resolve a path to a storage and internal path
*
* @param string $path
* @return array consisting of the storage and the internal path
*/
static public function resolvePath($path) {
$mount = Mount::find($path);
if ($mount) {
return array($mount->getStorage(), $mount->getInternalPath($path));
} else {
return array(null, null);
}
}
static public function init($user, $root) {
if (self::$defaultInstance) {
return false;
}
self::$defaultInstance = new View($root);
//load custom mount config
self::initMountPoints($user);
self::$loaded = true;
return true;
}
/**
* Initialize system and personal mount points for a user
*
* @param string $user
*/
public static function initMountPoints($user = '') {
if ($user == '') {
$user = \OC_User::getUser();
}
$parser = new \OC\ArrayParser();
$root = \OC_User::getHome($user);
self::mount('\OC\Files\Storage\Local', array('datadir' => $root), $user);
$datadir = \OC_Config::getValue("datadirectory", \OC::$SERVERROOT . "/data");
//move config file to it's new position
if (is_file(\OC::$SERVERROOT . '/config/mount.json')) {
rename(\OC::$SERVERROOT . '/config/mount.json', $datadir . '/mount.json');
}
// Load system mount points
if (is_file(\OC::$SERVERROOT . '/config/mount.php') or is_file($datadir . '/mount.json')) {
if (is_file($datadir . '/mount.json')) {
$mountConfig = json_decode(file_get_contents($datadir . '/mount.json'), true);
} elseif (is_file(\OC::$SERVERROOT . '/config/mount.php')) {
$mountConfig = $parser->parsePHP(file_get_contents(\OC::$SERVERROOT . '/config/mount.php'));
}
if (isset($mountConfig['global'])) {
foreach ($mountConfig['global'] as $mountPoint => $options) {
self::mount($options['class'], $options['options'], $mountPoint);
}
}
if (isset($mountConfig['group'])) {
foreach ($mountConfig['group'] as $group => $mounts) {
if (\OC_Group::inGroup($user, $group)) {
foreach ($mounts as $mountPoint => $options) {
$mountPoint = self::setUserVars($user, $mountPoint);
foreach ($options as &$option) {
$option = self::setUserVars($user, $option);
}
self::mount($options['class'], $options['options'], $mountPoint);
}
}
}
}
if (isset($mountConfig['user'])) {
foreach ($mountConfig['user'] as $mountUser => $mounts) {
if ($mountUser === 'all' or strtolower($mountUser) === strtolower($user)) {
foreach ($mounts as $mountPoint => $options) {
$mountPoint = self::setUserVars($user, $mountPoint);
foreach ($options as &$option) {
$option = self::setUserVars($user, $option);
}
self::mount($options['class'], $options['options'], $mountPoint);
}
}
}
}
}
// Load personal mount points
if (is_file($root . '/mount.php') or is_file($root . '/mount.json')) {
if (is_file($root . '/mount.json')) {
$mountConfig = json_decode(file_get_contents($root . '/mount.json'), true);
} elseif (is_file($root . '/mount.php')) {
$mountConfig = $parser->parsePHP(file_get_contents($root . '/mount.php'));
}
if (isset($mountConfig['user'][$user])) {
foreach ($mountConfig['user'][$user] as $mountPoint => $options) {
self::mount($options['class'], $options['options'], $mountPoint);
} }
}
}
/**
* fill in the correct values for $user, and $password placeholders
*
* @param string $input
* @param string $input
* @return string
*/
private static function setUserVars($user, $input) {
return str_replace('$user', $user, $input);
}
/**
* get the default filesystem view
*
* @return View
*/
static public function getView() {
return self::$defaultInstance;
}
/**
* tear down the filesystem, removing all storage providers
*/
static public function tearDown() {
self::clearMounts();
}
/**
* @brief get the relative path of the root data directory for the current user
* @return string
*
* Returns path like /admin/files
*/
static public function getRoot() {
return self::$defaultInstance->getRoot();
}
/**
* clear all mounts and storage backends
*/
public static function clearMounts() {
Mount::clear();
}
/**
* mount an \OC\Files\Storage\Storage in our virtual filesystem
*
* @param \OC\Files\Storage\Storage|string $class
* @param array $arguments
* @param string $mountpoint
*/
static public function mount($class, $arguments, $mountpoint) {
new Mount($class, $mountpoint, $arguments);
}
/**
* return the path to a local version of the file
* we need this because we can't know if a file is stored local or not from
* outside the filestorage and for some purposes a local file is needed
*
* @param string $path
* @return string
*/
static public function getLocalFile($path) {
return self::$defaultInstance->getLocalFile($path);
}
/**
* @param string $path
* @return string
*/
static public function getLocalFolder($path) {
return self::$defaultInstance->getLocalFolder($path);
}
/**
* return path to file which reflects one visible in browser
*
* @param string $path
* @return string
*/
static public function getLocalPath($path) {
$datadir = \OC_User::getHome(\OC_User::getUser()) . '/files';
$newpath = $path;
if (strncmp($newpath, $datadir, strlen($datadir)) == 0) {
$newpath = substr($path, strlen($datadir));
}
return $newpath;
}
/**
* check if the requested path is valid
*
* @param string $path
* @return bool
*/
static public function isValidPath($path) {
$path = self::normalizePath($path);
if (!$path || $path[0] !== '/') {
$path = '/' . $path;
}
if (strstr($path, '/../') || strrchr($path, '/') === '/..') {
return false;
}
return true;
}
/**
* checks if a file is blacklisted for storage in the filesystem
* Listens to write and rename hooks
*
* @param array $data from hook
*/
static public function isBlacklisted($data) {
if (isset($data['path'])) {
$path = $data['path'];
} else if (isset($data['newpath'])) {
$path = $data['newpath'];
}
if (isset($path)) {
if (self::isFileBlacklisted($path)) {
$data['run'] = false;
}
}
}
/**
* @param string $filename
* @return bool
*/
static public function isFileBlacklisted($filename) {
$blacklist = \OC_Config::getValue('blacklisted_files', array('.htaccess'));
$filename = strtolower(basename($filename));
return (in_array($filename, $blacklist));
}
/**
* following functions are equivalent to their php builtin equivalents for arguments/return values.
*/
static public function mkdir($path) {
return self::$defaultInstance->mkdir($path);
}
static public function rmdir($path) {
return self::$defaultInstance->rmdir($path);
}
static public function opendir($path) {
return self::$defaultInstance->opendir($path);
}
static public function readdir($path) {
return self::$defaultInstance->readdir($path);
}
static public function is_dir($path) {
return self::$defaultInstance->is_dir($path);
}
static public function is_file($path) {
return self::$defaultInstance->is_file($path);
}
static public function stat($path) {
return self::$defaultInstance->stat($path);
}
static public function filetype($path) {
return self::$defaultInstance->filetype($path);
}
static public function filesize($path) {
return self::$defaultInstance->filesize($path);
}
static public function readfile($path) {
return self::$defaultInstance->readfile($path);
}
static public function isCreatable($path) {
return self::$defaultInstance->isCreatable($path);
}
static public function isReadable($path) {
return self::$defaultInstance->isReadable($path);
}
static public function isUpdatable($path) {
return self::$defaultInstance->isUpdatable($path);
}
static public function isDeletable($path) {
return self::$defaultInstance->isDeletable($path);
}
static public function isSharable($path) {
return self::$defaultInstance->isSharable($path);
}
static public function file_exists($path) {
return self::$defaultInstance->file_exists($path);
}
static public function filemtime($path) {
return self::$defaultInstance->filemtime($path);
}
static public function touch($path, $mtime = null) {
return self::$defaultInstance->touch($path, $mtime);
}
static public function file_get_contents($path) {
return self::$defaultInstance->file_get_contents($path);
}
static public function file_put_contents($path, $data) {
return self::$defaultInstance->file_put_contents($path, $data);
}
static public function unlink($path) {
return self::$defaultInstance->unlink($path);
}
static public function rename($path1, $path2) {
return self::$defaultInstance->rename($path1, $path2);
}
static public function copy($path1, $path2) {
return self::$defaultInstance->copy($path1, $path2);
}
static public function fopen($path, $mode) {
return self::$defaultInstance->fopen($path, $mode);
}
static public function toTmpFile($path) {
return self::$defaultInstance->toTmpFile($path);
}
static public function fromTmpFile($tmpFile, $path) {
return self::$defaultInstance->fromTmpFile($tmpFile, $path);
}
static public function getMimeType($path) {
return self::$defaultInstance->getMimeType($path);
}
static public function hash($type, $path, $raw = false) {
return self::$defaultInstance->hash($type, $path, $raw);
}
static public function free_space($path = '/') {
return self::$defaultInstance->free_space($path);
}
static public function search($query) {
return self::$defaultInstance->search($query);
}
static public function searchByMime($query) {
return self::$defaultInstance->searchByMime($query);
}
/**
* check if a file or folder has been updated since $time
*
* @param string $path
* @param int $time
* @return bool
*/
static public function hasUpdated($path, $time) {
return self::$defaultInstance->hasUpdated($path, $time);
}
/**
* @brief Fix common problems with a file path * @param string $path
* @param bool $stripTrailingSlash
* @return string
*/
public static function normalizePath($path, $stripTrailingSlash = true) {
if ($path == '') {
return '/';
}
//no windows style slashes
$path = str_replace('\\', '/', $path);
//add leading slash
if ($path[0] !== '/') {
$path = '/' . $path;
}
//remove duplicate slashes
while (strpos($path, '//') !== false) {
$path = str_replace('//', '/', $path);
}
//remove trailing slash
if ($stripTrailingSlash and strlen($path) > 1 and substr($path, -1, 1) === '/') {
$path = substr($path, 0, -1);
}
//normalize unicode if possible
if (class_exists('Normalizer')) {
$path = \Normalizer::normalize($path);
}
return $path;
}
/**
* get the filesystem info
*
* @param string $path
* @return array
*
* returns an associative array with the following keys:
* - size
* - mtime
* - mimetype
* - encrypted
* - versioned
*/
public static function getFileInfo($path) {
return self::$defaultInstance->getFileInfo($path);
}
/**
* change file metadata
*
* @param string $path
* @param array $data
* @return int
*
* returns the fileid of the updated file
*/
public static function putFileInfo($path, $data) {
return self::$defaultInstance->putFileInfo($path, $data);
}
/**
* get the content of a directory
*
* @param string $directory path under datadirectory
* @param string $mimetype_filter limit returned content to this mimetype or mimepart
* @return array
*/
public static function getDirectoryContent($directory, $mimetype_filter = '') {
return self::$defaultInstance->getDirectoryContent($directory, $mimetype_filter);
}
/**
* Get the path of a file by id
*
* Note that the resulting path is not guarantied to be unique for the id, multiple paths can point to the same file
*
* @param int $id
* @return string
*/
public static function getPath($id) {
return self::$defaultInstance->getPath($id);
}
/**
* Get the owner for a file or folder
*
* @param string $path
* @return string
*/
public static function getOwner($path) {
return self::$defaultInstance->getOwner($path);
}
/**
* get the ETag for a file or folder
*
* @param string $path
* @return string
*/
static public function getETag($path) {
return self::$defaultInstance->getETag($path);
}
}
\OC_Hook::connect('OC_Filesystem', 'post_write', '\OC\Files\Cache\Updater', 'writeHook');
\OC_Hook::connect('OC_Filesystem', 'post_touch', '\OC\Files\Cache\Updater', 'touchHook');
\OC_Hook::connect('OC_Filesystem', 'post_delete', '\OC\Files\Cache\Updater', 'deleteHook');
\OC_Hook::connect('OC_Filesystem', 'post_rename', '\OC\Files\Cache\Updater', 'renameHook');
\OC_Util::setupFS();