450 lines
13 KiB
PHP
450 lines
13 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Michael Gapczynski
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* @copyright 2011 Michael Gapczynski mtgap@owncloud.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Convert target path to source path and pass the function call to the correct storage provider
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*/
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class OC_Filestorage_Shared extends OC_Filestorage_Common {
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private $sharedFolder;
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private $files = array();
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public function __construct($arguments) {
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$this->sharedFolder = $arguments['sharedFolder'];
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}
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/**
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* @brief Get the source file path and the permissions granted for a shared file
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* @param string Shared target file path
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* @return Returns array with the keys path and permissions or false if not found
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*/
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private function getFile($target) {
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$target = '/'.$target;
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$target = rtrim($target, '/');
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if (isset($this->files[$target])) {
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return $this->files[$target];
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} else {
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$pos = strpos($target, '/', 1);
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// Get shared folder name
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if ($pos !== false) {
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$folder = substr($target, 0, $pos);
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if (isset($this->files[$folder])) {
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$file = $this->files[$folder];
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} else {
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$file = OCP\Share::getItemSharedWith('folder', $folder, OC_Share_Backend_File::FORMAT_SHARED_STORAGE);
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}
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if ($file) {
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$this->files[$target]['path'] = $file['path'].substr($target, strlen($folder));
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$this->files[$target]['permissions'] = $file['permissions'];
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return $this->files[$target];
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}
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} else {
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$file = OCP\Share::getItemSharedWith('file', $target, OC_Share_Backend_File::FORMAT_SHARED_STORAGE);
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if ($file) {
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$this->files[$target] = $file;
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return $this->files[$target];
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}
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}
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OCP\Util::writeLog('files_sharing', 'File source not found for: '.$target, OCP\Util::ERROR);
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return false;
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}
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}
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/**
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* @brief Get the source file path for a shared file
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* @param string Shared target file path
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* @return Returns source file path or false if not found
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*/
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private function getSourcePath($target) {
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$file = $this->getFile($target);
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if (isset($file['path'])) {
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$uid = substr($file['path'], 1, strpos($file['path'], '/', 1) - 1);
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OC_Filesystem::mount('OC_Filestorage_Local', array('datadir' => OC_User::getHome($uid)), $uid);
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return $file['path'];
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}
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return false;
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}
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/**
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* @brief Get the permissions granted for a shared file
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* @param string Shared target file path
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* @return Returns CRUDS permissions granted or false if not found
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*/
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private function getPermissions($target) {
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$file = $this->getFile($target);
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if (isset($file['permissions'])) {
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return $file['permissions'];
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}
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return false;
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}
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/**
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* @brief Get the internal path to pass to the storage filesystem call
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* @param string Source file path
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* @return Source file path with mount point stripped out
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*/
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private function getInternalPath($path) {
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$mountPoint = OC_Filesystem::getMountPoint($path);
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$internalPath = substr($path, strlen($mountPoint));
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return $internalPath;
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}
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public function mkdir($path) {
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if ($path == '' || $path == '/' || !$this->isCreatable(dirname($path))) {
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return false;
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->mkdir($this->getInternalPath($source));
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}
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return false;
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}
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public function rmdir($path) {
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if (($source = $this->getSourcePath($path)) && $this->isDeletable($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->rmdir($this->getInternalPath($source));
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}
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return false;
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}
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public function opendir($path) {
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if ($path == '' || $path == '/') {
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$files = OCP\Share::getItemsSharedWith('file', OC_Share_Backend_Folder::FORMAT_OPENDIR);
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OC_FakeDirStream::$dirs['shared'] = $files;
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return opendir('fakedir://shared');
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->opendir($this->getInternalPath($source));
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}
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return false;
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}
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public function is_dir($path) {
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if ($path == '' || $path == '/') {
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return true;
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->is_dir($this->getInternalPath($source));
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}
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return false;
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}
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public function is_file($path) {
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if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->is_file($this->getInternalPath($source));
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}
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return false;
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}
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public function stat($path) {
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if ($path == '' || $path == '/') {
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$stat['size'] = $this->filesize($path);
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$stat['mtime'] = $this->filemtime($path);
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$stat['ctime'] = $this->filectime($path);
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return $stat;
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->stat($this->getInternalPath($source));
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}
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return false;
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}
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public function filetype($path) {
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if ($path == '' || $path == '/') {
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return 'dir';
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->filetype($this->getInternalPath($source));
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}
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return false;
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}
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public function filesize($path) {
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if ($path == '' || $path == '/' || $this->is_dir($path)) {
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return 0;
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->filesize($this->getInternalPath($source));
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}
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return false;
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}
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public function isCreatable($path) {
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if ($path == '') {
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return false;
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}
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return ($this->getPermissions($path) & OCP\Share::PERMISSION_CREATE);
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}
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public function isReadable($path) {
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return $this->file_exists($path);
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}
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public function isUpdatable($path) {
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if ($path == '') {
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return false;
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}
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return ($this->getPermissions($path) & OCP\Share::PERMISSION_UPDATE);
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}
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public function isDeletable($path) {
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if ($path == '') {
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return true;
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}
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return ($this->getPermissions($path) & OCP\Share::PERMISSION_DELETE);
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}
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public function isSharable($path) {
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if ($path == '') {
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return false;
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}
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return ($this->getPermissions($path) & OCP\Share::PERMISSION_SHARE);
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}
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public function file_exists($path) {
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if ($path == '' || $path == '/') {
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return true;
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} else if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->file_exists($this->getInternalPath($source));
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}
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return false;
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}
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public function filectime($path) {
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if ($path == '' || $path == '/') {
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$ctime = 0;
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if ($dh = $this->opendir($path)) {
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while (($filename = readdir($dh)) !== false) {
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$tempctime = $this->filectime($filename);
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if ($tempctime < $ctime) {
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$ctime = $tempctime;
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}
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}
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}
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return $ctime;
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} else {
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$source = $this->getSourcePath($path);
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if ($source) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->filectime($this->getInternalPath($source));
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}
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}
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}
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public function filemtime($path) {
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if ($path == '' || $path == '/') {
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$mtime = 0;
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if ($dh = $this->opendir($path)) {
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while (($filename = readdir($dh)) !== false) {
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$tempmtime = $this->filemtime($filename);
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if ($tempmtime > $mtime) {
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$mtime = $tempmtime;
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}
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}
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}
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return $mtime;
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} else {
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$source = $this->getSourcePath($path);
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if ($source) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->filemtime($this->getInternalPath($source));
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}
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}
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}
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public function file_get_contents($path) {
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$source = $this->getSourcePath($path);
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if ($source) {
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$info = array(
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'target' => $this->sharedFolder.$path,
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'source' => $source,
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);
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OCP\Util::emitHook('OC_Filestorage_Shared', 'file_get_contents', $info);
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$storage = OC_Filesystem::getStorage($source);
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return $storage->file_get_contents($this->getInternalPath($source));
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}
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}
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public function file_put_contents($path, $data) {
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if ($source = $this->getSourcePath($path)) {
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// Check if permission is granted
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if (($this->file_exists($path) && !$this->isUpdatable($path)) || ($this->is_dir($path) && !$this->isCreatable($path))) {
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return false;
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}
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$info = array(
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'target' => $this->sharedFolder.$path,
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'source' => $source,
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);
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OCP\Util::emitHook('OC_Filestorage_Shared', 'file_put_contents', $info);
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$storage = OC_Filesystem::getStorage($source);
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$result = $storage->file_put_contents($this->getInternalPath($source), $data);
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return $result;
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}
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return false;
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}
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public function unlink($path) {
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// Delete the file if DELETE permission is granted
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if ($source = $this->getSourcePath($path)) {
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if ($this->isDeletable($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->unlink($this->getInternalPath($source));
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} else if (dirname($path) == '/' || dirname($path) == '.') {
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// Unshare the file from the user if in the root of the Shared folder
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if ($this->is_dir($path)) {
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$itemType = 'folder';
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} else {
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$itemType = 'file';
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}
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return OCP\Share::unshareFromSelf($itemType, $path);
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}
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}
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return false;
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}
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public function rename($path1, $path2) {
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// Renaming/moving is only allowed within shared folders
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$pos1 = strpos($path1, '/', 1);
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$pos2 = strpos($path2, '/', 1);
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if ($pos1 !== false && $pos2 !== false && ($oldSource = $this->getSourcePath($path1))) {
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$newSource = $this->getSourcePath(dirname($path2)).'/'.basename($path2);
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if (dirname($path1) == dirname($path2)) {
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// Rename the file if UPDATE permission is granted
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if ($this->isUpdatable($path1)) {
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$storage = OC_Filesystem::getStorage($oldSource);
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return $storage->rename($this->getInternalPath($oldSource), $this->getInternalPath($newSource));
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}
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} else {
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// Move the file if DELETE and CREATE permissions are granted
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if ($this->isDeletable($path1) && $this->isCreatable(dirname($path2))) {
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// Get the root shared folder
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$folder1 = substr($path1, 0, $pos1);
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$folder2 = substr($path2, 0, $pos2);
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// Copy and unlink the file if it exists in a different shared folder
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if ($folder1 != $folder2) {
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if ($this->copy($path1, $path2)) {
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return $this->unlink($path1);
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}
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} else {
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$storage = OC_Filesystem::getStorage($oldSource);
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return $storage->rename($this->getInternalPath($oldSource), $this->getInternalPath($newSource));
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}
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}
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}
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}
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return false;
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}
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public function copy($path1, $path2) {
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// Copy the file if CREATE permission is granted
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if ($this->isCreatable(dirname($path2))) {
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$source = $this->fopen($path1, 'r');
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$target = $this->fopen($path2, 'w');
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return OC_Helper::streamCopy($source, $target);
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}
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return false;
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}
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public function fopen($path, $mode) {
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if ($source = $this->getSourcePath($path)) {
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switch ($mode) {
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case 'r+':
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case 'rb+':
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case 'w+':
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case 'wb+':
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case 'x+':
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case 'xb+':
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case 'a+':
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case 'ab+':
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case 'w':
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case 'wb':
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case 'x':
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case 'xb':
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case 'a':
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case 'ab':
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if (!$this->isUpdatable($path)) {
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return false;
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}
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}
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$info = array(
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'target' => $this->sharedFolder.$path,
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'source' => $source,
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'mode' => $mode,
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);
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OCP\Util::emitHook('OC_Filestorage_Shared', 'fopen', $info);
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$storage = OC_Filesystem::getStorage($source);
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return $storage->fopen($this->getInternalPath($source), $mode);
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}
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return false;
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}
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public function getMimeType($path) {
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if ($path == '' || $path == '/') {
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return 'httpd/unix-directory';
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}
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if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->getMimeType($this->getInternalPath($source));
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}
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return false;
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}
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public function free_space($path) {
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$source = $this->getSourcePath($path);
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if ($source) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->free_space($this->getInternalPath($source));
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}
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}
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public function getLocalFile($path) {
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if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->getLocalFile($this->getInternalPath($source));
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}
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return false;
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}
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public function touch($path, $mtime = null) {
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if ($source = $this->getSourcePath($path)) {
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$storage = OC_Filesystem::getStorage($source);
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return $storage->touch($this->getInternalPath($source), $mtime);
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}
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return false;
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}
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public static function setup($options) {
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$user_dir = $options['user_dir'];
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OC_Filesystem::mount('OC_Filestorage_Shared', array('sharedFolder' => '/Shared'), $user_dir.'/Shared/');
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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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* @param int $time
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* @return bool
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*/
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public function hasUpdated($path,$time) {
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//TODO
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return false;
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}
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}
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