300 lines
8.9 KiB
PHP
300 lines
8.9 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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namespace OC\Files\Storage\Wrapper;
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use OC\Files\Filesystem;
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use OCP\Cache\CappedMemoryCache;
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use OCP\Files\Cache\IScanner;
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use OCP\Files\Storage\IStorage;
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use OCP\ICache;
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/**
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* Encoding wrapper that deals with file names that use unsupported encodings like NFD.
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*
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* When applied and a UTF-8 path name was given, the wrapper will first attempt to access
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* the actual given name and then try its NFD form.
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*/
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class Encoding extends Wrapper {
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/**
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* @var ICache
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*/
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private $namesCache;
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/**
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* @param array $parameters
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*/
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public function __construct($parameters) {
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$this->storage = $parameters['storage'];
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$this->namesCache = new CappedMemoryCache();
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}
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/**
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* Returns whether the given string is only made of ASCII characters
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*
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* @param string $str string
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*/
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private function isAscii($str): bool {
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return !preg_match('/[\\x80-\\xff]+/', $str);
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}
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/**
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* Checks whether the given path exists in NFC or NFD form after checking
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* each form for each path section and returns the correct form.
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* If no existing path found, returns the path as it was given.
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*
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* @param string $fullPath path to check
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*
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* @return string original or converted path
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*/
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private function findPathToUse($fullPath): string {
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$cachedPath = $this->namesCache[$fullPath];
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if ($cachedPath !== null) {
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return $cachedPath;
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}
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$sections = explode('/', $fullPath);
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$path = '';
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foreach ($sections as $section) {
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$convertedPath = $this->findPathToUseLastSection($path, $section);
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if ($convertedPath === null) {
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// no point in continuing if the section was not found, use original path
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return $fullPath;
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}
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$path = $convertedPath . '/';
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}
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$path = rtrim($path, '/');
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return $path;
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}
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/**
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* Checks whether the last path section of the given path exists in NFC or NFD form
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* and returns the correct form. If no existing path found, returns null.
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*
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* @param string $basePath base path to check
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* @param string $lastSection last section of the path to check for NFD/NFC variations
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*
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* @return string|null original or converted path, or null if none of the forms was found
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*/
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private function findPathToUseLastSection($basePath, $lastSection): ?string {
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$fullPath = $basePath . $lastSection;
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if ($lastSection === '' || $this->isAscii($lastSection) || $this->storage->file_exists($fullPath)) {
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$this->namesCache[$fullPath] = $fullPath;
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return $fullPath;
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}
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// swap encoding
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if (\Normalizer::isNormalized($lastSection, \Normalizer::FORM_C)) {
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$otherFormPath = \Normalizer::normalize($lastSection, \Normalizer::FORM_D);
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} else {
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$otherFormPath = \Normalizer::normalize($lastSection, \Normalizer::FORM_C);
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}
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$otherFullPath = $basePath . $otherFormPath;
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if ($this->storage->file_exists($otherFullPath)) {
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$this->namesCache[$fullPath] = $otherFullPath;
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return $otherFullPath;
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}
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// return original path, file did not exist at all
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$this->namesCache[$fullPath] = $fullPath;
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return null;
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}
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public function mkdir($path): bool {
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// note: no conversion here, method should not be called with non-NFC names!
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$result = $this->storage->mkdir($path);
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if ($result) {
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$this->namesCache[$path] = $path;
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}
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return $result;
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}
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public function rmdir($path): bool {
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$result = $this->storage->rmdir($this->findPathToUse($path));
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if ($result) {
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unset($this->namesCache[$path]);
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}
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return $result;
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}
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public function opendir($path) {
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$handle = $this->storage->opendir($this->findPathToUse($path));
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return EncodingDirectoryWrapper::wrap($handle);
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}
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public function is_dir($path): bool {
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return $this->storage->is_dir($this->findPathToUse($path));
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}
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public function is_file($path): bool {
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return $this->storage->is_file($this->findPathToUse($path));
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}
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public function stat($path): array|false {
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return $this->storage->stat($this->findPathToUse($path));
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}
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public function filetype($path): string|false {
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return $this->storage->filetype($this->findPathToUse($path));
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}
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public function filesize($path): int|float|false {
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return $this->storage->filesize($this->findPathToUse($path));
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}
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public function isCreatable($path): bool {
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return $this->storage->isCreatable($this->findPathToUse($path));
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}
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public function isReadable($path): bool {
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return $this->storage->isReadable($this->findPathToUse($path));
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}
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public function isUpdatable($path): bool {
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return $this->storage->isUpdatable($this->findPathToUse($path));
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}
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public function isDeletable($path): bool {
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return $this->storage->isDeletable($this->findPathToUse($path));
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}
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public function isSharable($path): bool {
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return $this->storage->isSharable($this->findPathToUse($path));
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}
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public function getPermissions($path): int {
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return $this->storage->getPermissions($this->findPathToUse($path));
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}
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public function file_exists($path): bool {
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return $this->storage->file_exists($this->findPathToUse($path));
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}
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public function filemtime($path): int|false {
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return $this->storage->filemtime($this->findPathToUse($path));
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}
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public function file_get_contents($path): string|false {
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return $this->storage->file_get_contents($this->findPathToUse($path));
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}
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public function file_put_contents($path, $data): int|float|false {
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return $this->storage->file_put_contents($this->findPathToUse($path), $data);
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}
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public function unlink($path): bool {
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$result = $this->storage->unlink($this->findPathToUse($path));
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if ($result) {
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unset($this->namesCache[$path]);
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}
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return $result;
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}
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public function rename($source, $target): bool {
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// second name always NFC
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return $this->storage->rename($this->findPathToUse($source), $this->findPathToUse($target));
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}
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public function copy($source, $target): bool {
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return $this->storage->copy($this->findPathToUse($source), $this->findPathToUse($target));
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}
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public function fopen($path, $mode) {
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$result = $this->storage->fopen($this->findPathToUse($path), $mode);
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if ($result && $mode !== 'r' && $mode !== 'rb') {
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unset($this->namesCache[$path]);
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}
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return $result;
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}
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public function getMimeType($path): string|false {
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return $this->storage->getMimeType($this->findPathToUse($path));
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}
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public function hash($type, $path, $raw = false): string|false {
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return $this->storage->hash($type, $this->findPathToUse($path), $raw);
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}
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public function free_space($path): int|float|false {
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return $this->storage->free_space($this->findPathToUse($path));
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}
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public function touch($path, $mtime = null): bool {
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return $this->storage->touch($this->findPathToUse($path), $mtime);
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}
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public function getLocalFile($path): string|false {
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return $this->storage->getLocalFile($this->findPathToUse($path));
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}
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public function hasUpdated($path, $time): bool {
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return $this->storage->hasUpdated($this->findPathToUse($path), $time);
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}
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public function getCache($path = '', $storage = null): \OCP\Files\Cache\ICache {
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if (!$storage) {
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$storage = $this;
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}
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return $this->storage->getCache($this->findPathToUse($path), $storage);
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}
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public function getScanner($path = '', $storage = null): IScanner {
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if (!$storage) {
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$storage = $this;
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}
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return $this->storage->getScanner($this->findPathToUse($path), $storage);
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}
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public function getETag($path): string|false {
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return $this->storage->getETag($this->findPathToUse($path));
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}
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public function copyFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath): bool {
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if ($sourceStorage === $this) {
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return $this->copy($sourceInternalPath, $this->findPathToUse($targetInternalPath));
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}
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$result = $this->storage->copyFromStorage($sourceStorage, $sourceInternalPath, $this->findPathToUse($targetInternalPath));
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if ($result) {
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unset($this->namesCache[$targetInternalPath]);
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}
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return $result;
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}
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public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath): bool {
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if ($sourceStorage === $this) {
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$result = $this->rename($sourceInternalPath, $this->findPathToUse($targetInternalPath));
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if ($result) {
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unset($this->namesCache[$sourceInternalPath]);
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unset($this->namesCache[$targetInternalPath]);
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}
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return $result;
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}
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$result = $this->storage->moveFromStorage($sourceStorage, $sourceInternalPath, $this->findPathToUse($targetInternalPath));
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if ($result) {
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unset($this->namesCache[$sourceInternalPath]);
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unset($this->namesCache[$targetInternalPath]);
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}
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return $result;
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}
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public function getMetaData($path): ?array {
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$entry = $this->storage->getMetaData($this->findPathToUse($path));
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$entry['name'] = trim(Filesystem::normalizePath($entry['name']), '/');
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return $entry;
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}
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public function getDirectoryContent($directory): \Traversable {
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$entries = $this->storage->getDirectoryContent($this->findPathToUse($directory));
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foreach ($entries as $entry) {
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$entry['name'] = trim(Filesystem::normalizePath($entry['name']), '/');
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yield $entry;
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}
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}
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}
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