619 lines
16 KiB
PHP
619 lines
16 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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/**
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* Class for abstraction of filesystem functions
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* This class won't call any filesystem functions for itself but but will pass them to the correct OC_Filestorage object
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* this class should also handle all the file permission related stuff
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*
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* Hooks provided:
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* read(path)
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* write(path, &run)
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* post_write(path)
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* create(path, &run) (when a file is created, both create and write will be emitted in that order)
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* post_create(path)
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* delete(path, &run)
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* post_delete(path)
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* rename(oldpath,newpath, &run)
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* post_rename(oldpath,newpath)
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* copy(oldpath,newpath, &run) (if the newpath doesn't exists yes, copy, create and write will be emitted in that order)
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* post_rename(oldpath,newpath)
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*
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* the &run parameter can be set to false to prevent the operation from occurring
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*/
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namespace OC\Files;
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class Filesystem {
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static private $storages = array();
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static private $mounts = array();
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public static $loaded = false;
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/**
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* @var \OC\Files\View $defaultInstance
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*/
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static private $defaultInstance;
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/**
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* classname which used for hooks handling
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* used as signalclass in OC_Hooks::emit()
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*/
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const CLASSNAME = 'OC_Filesystem';
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/**
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* signalname emitted before file renaming
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*
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* @param string $oldpath
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* @param string $newpath
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*/
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const signal_rename = 'rename';
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/**
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* signal emitted after file renaming
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*
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* @param string $oldpath
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* @param string $newpath
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*/
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const signal_post_rename = 'post_rename';
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/**
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* signal emitted before file/dir creation
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*
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* @param string $path
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* @param bool $run changing this flag to false in hook handler will cancel event
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*/
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const signal_create = 'create';
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/**
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* signal emitted after file/dir creation
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*
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* @param string $path
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* @param bool $run changing this flag to false in hook handler will cancel event
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*/
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const signal_post_create = 'post_create';
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/**
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* signal emits before file/dir copy
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*
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* @param string $oldpath
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* @param string $newpath
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* @param bool $run changing this flag to false in hook handler will cancel event
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*/
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const signal_copy = 'copy';
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/**
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* signal emits after file/dir copy
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*
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* @param string $oldpath
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* @param string $newpath
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*/
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const signal_post_copy = 'post_copy';
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/**
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* signal emits before file/dir save
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*
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* @param string $path
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* @param bool $run changing this flag to false in hook handler will cancel event
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*/
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const signal_write = 'write';
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/**
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* signal emits after file/dir save
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*
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* @param string $path
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*/
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const signal_post_write = 'post_write';
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/**
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* signal emits when reading file/dir
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*
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* @param string $path
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*/
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const signal_read = 'read';
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/**
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* signal emits when removing file/dir
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*
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* @param string $path
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*/
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const signal_delete = 'delete';
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/**
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* parameters definitions for signals
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*/
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const signal_param_path = 'path';
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const signal_param_oldpath = 'oldpath';
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const signal_param_newpath = 'newpath';
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/**
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* run - changing this flag to false in hook handler will cancel event
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*/
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const signal_param_run = 'run';
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/**
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* get the mountpoint of the storage object for a path
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( 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
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*
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* @param string $path
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* @return string
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*/
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static public function getMountPoint($path) {
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\OC_Hook::emit(self::CLASSNAME, 'get_mountpoint', array('path' => $path));
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if (!$path) {
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$path = '/';
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}
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if ($path[0] !== '/') {
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$path = '/' . $path;
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}
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$path = str_replace('//', '/', $path);
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$foundMountPoint = '';
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$mountPoints = array_keys(self::$mounts);
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foreach ($mountPoints as $mountpoint) {
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if ($mountpoint == $path) {
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return $mountpoint;
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}
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if (strpos($path, $mountpoint) === 0 and strlen($mountpoint) > strlen($foundMountPoint)) {
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$foundMountPoint = $mountpoint;
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}
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}
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return $foundMountPoint;
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}
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/**
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* get a list of all mount points in a directory
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*
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* @param string $path
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* @return string[]
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*/
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static public function getMountPoints($path) {
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$path = self::normalizePath($path);
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if (strlen($path) > 1) {
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$path .= '/';
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}
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$pathLength = strlen($path);
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$mountPoints = array_keys(self::$mounts);
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$result = array();
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foreach ($mountPoints as $mountPoint) {
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if (substr($mountPoint, 0, $pathLength) === $path and strlen($mountPoint) > $pathLength) {
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$result[] = $mountPoint;
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}
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}
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return $result;
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}
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/**
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* get the storage mounted at $mountPoint
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*
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* @param string $mountPoint
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* @return \OC\Files\Storage\Storage
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*/
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public static function getStorage($mountPoint) {
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if (!isset(self::$storages[$mountPoint])) {
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$mount = self::$mounts[$mountPoint];
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self::$storages[$mountPoint] = self::createStorage($mount['class'], $mount['arguments']);
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}
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return self::$storages[$mountPoint];
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}
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/**
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* resolve a path to a storage and internal path
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*
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* @param string $path
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* @return array consisting of the storage and the internal path
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*/
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static public function resolvePath($path) {
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$mountpoint = self::getMountPoint($path);
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if ($mountpoint) {
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$storage = self::getStorage($mountpoint);
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if ($mountpoint === $path) {
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$internalPath = '';
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} else {
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$internalPath = substr($path, strlen($mountpoint));
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}
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return array($storage, $internalPath);
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} else {
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return array(null, null);
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}
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}
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static public function init($root) {
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if (self::$defaultInstance) {
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return false;
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}
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self::$defaultInstance = new View($root);
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//load custom mount config
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if (is_file(\OC::$SERVERROOT . '/config/mount.php')) {
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$mountConfig = include 'config/mount.php';
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if (isset($mountConfig['global'])) {
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foreach ($mountConfig['global'] as $mountPoint => $options) {
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self::mount($options['class'], $options['options'], $mountPoint);
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}
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}
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if (isset($mountConfig['group'])) {
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foreach ($mountConfig['group'] as $group => $mounts) {
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if (\OC_Group::inGroup(\OC_User::getUser(), $group)) {
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foreach ($mounts as $mountPoint => $options) {
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$mountPoint = self::setUserVars($mountPoint);
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foreach ($options as &$option) {
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$option = self::setUserVars($option);
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}
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self::mount($options['class'], $options['options'], $mountPoint);
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}
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}
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}
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}
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if (isset($mountConfig['user'])) {
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foreach ($mountConfig['user'] as $user => $mounts) {
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if ($user === 'all' or strtolower($user) === strtolower(\OC_User::getUser())) {
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foreach ($mounts as $mountPoint => $options) {
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$mountPoint = self::setUserVars($mountPoint);
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foreach ($options as &$option) {
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$option = self::setUserVars($option);
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}
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self::mount($options['class'], $options['options'], $mountPoint);
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}
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}
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}
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}
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}
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self::$loaded = true;
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return true;
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}
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/**
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* fill in the correct values for $user, and $password placeholders
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*
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* @param string $input
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* @return string
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*/
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private static function setUserVars($input) {
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return str_replace('$user', \OC_User::getUser(), $input);
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}
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/**
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* get the default filesystem view
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*
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* @return View
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*/
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static public function getView() {
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return self::$defaultInstance;
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}
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/**
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* tear down the filesystem, removing all storage providers
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*/
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static public function tearDown() {
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self::$storages = array();
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}
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/**
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* create a new storage of a specific type
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*
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* @param string $type
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* @param array $arguments
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* @return \OC\Files\Storage\Storage
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*/
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static private function createStorage($class, $arguments) {
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if (class_exists($class)) {
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try {
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return new $class($arguments);
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} catch (\Exception $exception) {
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\OC_Log::write('core', $exception->getMessage(), \OC_Log::ERROR);
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return false;
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}
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} else {
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\OC_Log::write('core', 'storage backend ' . $class . ' not found', \OC_Log::ERROR);
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return false;
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}
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}
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/**
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* @brief get the relative path of the root data directory for the current user
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* @return string
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*
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* Returns path like /admin/files
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*/
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static public function getRoot() {
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return self::$defaultInstance->getRoot();
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}
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/**
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* clear all mounts and storage backends
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*/
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public static function clearMounts() {
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self::$mounts = array();
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self::$storages = array();
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}
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/**
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* mount an \OC\Files\Storage\Storage in our virtual filesystem
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*
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* @param \OC\Files\Storage\Storage|string $class
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* @param array $arguments
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* @param string $mountpoint
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*/
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static public function mount($class, $arguments, $mountpoint) {
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$mountpoint = self::normalizePath($mountpoint);
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if (strlen($mountpoint) > 1) {
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$mountpoint .= '/';
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}
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if ($class instanceof \OC\Files\Storage\Storage) {
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self::$mounts[$mountpoint] = array('class' => get_class($class), 'arguments' => $arguments);
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self::$storages[$mountpoint] = $class;
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} else {
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self::$mounts[$mountpoint] = array('class' => $class, 'arguments' => $arguments);
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}
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}
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/**
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* return the path to a local version of the file
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* 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
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*
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* @param string $path
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* @return string
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*/
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static public function getLocalFile($path) {
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return self::$defaultInstance->getLocalFile($path);
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}
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/**
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* @param string $path
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* @return string
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*/
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static public function getLocalFolder($path) {
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return self::$defaultInstance->getLocalFolder($path);
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}
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/**
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* return path to file which reflects one visible in browser
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*
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* @param string $path
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* @return string
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*/
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static public function getLocalPath($path) {
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$datadir = \OC_User::getHome(\OC_User::getUser()) . '/files';
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$newpath = $path;
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if (strncmp($newpath, $datadir, strlen($datadir)) == 0) {
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$newpath = substr($path, strlen($datadir));
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}
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return $newpath;
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}
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/**
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* check if the requested path is valid
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*
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* @param string $path
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* @return bool
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*/
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static public function isValidPath($path) {
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if (!$path || $path[0] !== '/') {
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$path = '/' . $path;
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}
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if (strstr($path, '/../') || strrchr($path, '/') === '/..') {
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return false;
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}
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return true;
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}
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/**
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* checks if a file is blacklisted for storage in the filesystem
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* Listens to write and rename hooks
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*
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* @param array $data from hook
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*/
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static public function isBlacklisted($data) {
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$blacklist = array('.htaccess');
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if (isset($data['path'])) {
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$path = $data['path'];
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} else if (isset($data['newpath'])) {
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$path = $data['newpath'];
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}
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if (isset($path)) {
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$filename = strtolower(basename($path));
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if (in_array($filename, $blacklist)) {
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$data['run'] = false;
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}
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}
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}
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/**
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* following functions are equivalent to their php builtin equivalents for arguments/return values.
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*/
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static public function mkdir($path) {
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return self::$defaultInstance->mkdir($path);
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}
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static public function rmdir($path) {
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return self::$defaultInstance->rmdir($path);
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}
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static public function opendir($path) {
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return self::$defaultInstance->opendir($path);
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}
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static public function readdir($path) {
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return self::$defaultInstance->readdir($path);
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}
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static public function is_dir($path) {
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return self::$defaultInstance->is_dir($path);
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}
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static public function is_file($path) {
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return self::$defaultInstance->is_file($path);
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}
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static public function stat($path) {
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return self::$defaultInstance->stat($path);
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}
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static public function filetype($path) {
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return self::$defaultInstance->filetype($path);
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}
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static public function filesize($path) {
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return self::$defaultInstance->filesize($path);
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}
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static public function readfile($path) {
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return self::$defaultInstance->readfile($path);
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}
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static public function isCreatable($path) {
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return self::$defaultInstance->isCreatable($path);
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}
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static public function isReadable($path) {
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return self::$defaultInstance->isReadable($path);
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}
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static public function isUpdatable($path) {
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return self::$defaultInstance->isUpdatable($path);
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}
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static public function isDeletable($path) {
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return self::$defaultInstance->isDeletable($path);
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}
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static public function isSharable($path) {
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return self::$defaultInstance->isSharable($path);
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}
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static public function file_exists($path) {
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return self::$defaultInstance->file_exists($path);
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}
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static public function filemtime($path) {
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return self::$defaultInstance->filemtime($path);
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}
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static public function touch($path, $mtime = null) {
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return self::$defaultInstance->touch($path, $mtime);
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}
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static public function file_get_contents($path) {
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return self::$defaultInstance->file_get_contents($path);
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}
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static public function file_put_contents($path, $data) {
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return self::$defaultInstance->file_put_contents($path, $data);
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}
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static public function unlink($path) {
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return self::$defaultInstance->unlink($path);
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}
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static public function rename($path1, $path2) {
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return self::$defaultInstance->rename($path1, $path2);
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}
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static public function copy($path1, $path2) {
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return self::$defaultInstance->copy($path1, $path2);
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}
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static public function fopen($path, $mode) {
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return self::$defaultInstance->fopen($path, $mode);
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}
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static public function toTmpFile($path) {
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return self::$defaultInstance->toTmpFile($path);
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}
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static public function fromTmpFile($tmpFile, $path) {
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return self::$defaultInstance->fromTmpFile($tmpFile, $path);
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}
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static public function getMimeType($path) {
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return self::$defaultInstance->getMimeType($path);
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}
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static public function hash($type, $path, $raw = false) {
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return self::$defaultInstance->hash($type, $path, $raw);
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}
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static public function free_space($path = '/') {
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return self::$defaultInstance->free_space($path);
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}
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static public function search($query) {
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return Cache\Cache::search($query);
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}
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/**
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* check if a file or folder has been updated since $time
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*
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* @param int $time
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* @return bool
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*/
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static public function hasUpdated($path, $time) {
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return self::$defaultInstance->hasUpdated($path, $time);
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}
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static public function removeETagHook($params, $root = false) {
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if (isset($params['path'])) {
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$path = $params['path'];
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} else {
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$path = $params['oldpath'];
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}
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if ($root) { // reduce path to the required part of it (no 'username/files')
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$fakeRootView = new View($root);
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$count = 1;
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$path = str_replace(\OC_App::getStorage("files")->getAbsolutePath(''), "", $fakeRootView->getAbsolutePath($path), $count);
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}
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$path = self::normalizePath($path);
|
|
\OC_Connector_Sabre_Node::removeETagPropertyForPath($path);
|
|
}
|
|
|
|
/**
|
|
* normalize a 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 = '/' . $path;
|
|
}
|
|
//remove trailing slash
|
|
if ($stripTrailingSlash and strlen($path) > 1 and substr($path, -1, 1) === '/') {
|
|
$path = substr($path, 0, -1);
|
|
}
|
|
//remove duplicate slashes
|
|
while (strpos($path, '//') !== false) {
|
|
$path = str_replace('//', '/', $path);
|
|
}
|
|
//normalize unicode if possible
|
|
if (class_exists('Normalizer')) {
|
|
$path = \Normalizer::normalize($path);
|
|
}
|
|
return $path;
|
|
}
|
|
}
|
|
|
|
\OC_Hook::connect('OC_Filesystem', 'post_write', 'OC_Filesystem', 'removeETagHook');
|
|
\OC_Hook::connect('OC_Filesystem', 'post_delete', 'OC_Filesystem', 'removeETagHook');
|
|
\OC_Hook::connect('OC_Filesystem', 'post_rename', 'OC_Filesystem', 'removeETagHook');
|
|
|
|
\OC_Util::setupFS();
|