612 lines
18 KiB
PHP
612 lines
18 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Bjoern Schiessle, Michael Gapczynski
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* @copyright 2011 Michael Gapczynski <mtgap@owncloud.com>
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* 2014 Bjoern Schiessle <schiessle@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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namespace OC\Files\Storage;
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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 Shared extends \OC\Files\Storage\Common {
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private $share; // the shared resource
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private $files = array();
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public function __construct($arguments) {
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$this->share = $arguments['share'];
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}
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/**
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* get id of the mount point
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* @return string
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*/
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public function getId() {
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return 'shared::' . $this->getMountPoint();
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}
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/**
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* get file cache of the shared item source
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* @return string
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*/
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public function getSourceId() {
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return $this->share['file_source'];
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}
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/**
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* Get the source file path, permissions, and owner for a shared file
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* @param string $target Shared target file path
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* @return Returns array with the keys path, permissions, and owner or false if not found
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*/
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public function getFile($target) {
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if (!isset($this->files[$target])) {
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// Check for partial files
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if (pathinfo($target, PATHINFO_EXTENSION) === 'part') {
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$source = \OC_Share_Backend_File::getSource(substr($target, 0, -5), $this->getMountPoint(), $this->getItemType());
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if ($source) {
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$source['path'] .= '.part';
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// All partial files have delete permission
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$source['permissions'] |= \OCP\PERMISSION_DELETE;
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}
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} else {
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$source = \OC_Share_Backend_File::getSource($target, $this->getMountPoint(), $this->getItemType());
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}
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$this->files[$target] = $source;
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}
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return $this->files[$target];
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}
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/**
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* Get the source file path for a shared file
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* @param string $target Shared target file path
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* @return string source file path or false if not found
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*/
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public function getSourcePath($target) {
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$source = $this->getFile($target);
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if ($source) {
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if (!isset($source['fullPath'])) {
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\OC\Files\Filesystem::initMountPoints($source['fileOwner']);
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$mount = \OC\Files\Filesystem::getMountByNumericId($source['storage']);
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if (is_array($mount) && !empty($mount)) {
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$this->files[$target]['fullPath'] = $mount[key($mount)]->getMountPoint() . $source['path'];
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} else {
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$this->files[$target]['fullPath'] = false;
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\OCP\Util::writeLog('files_sharing', "Unable to get mount for shared storage '" . $source['storage'] . "' user '" . $source['fileOwner'] . "'", \OCP\Util::ERROR);
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}
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}
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return $this->files[$target]['fullPath'];
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}
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return false;
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}
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/**
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* Get the permissions granted for a shared file
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* @param string $target Shared target file path
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* @return int CRUDS permissions granted
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*/
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public function getPermissions($target) {
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$permissions = $this->share['permissions'];
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// part file are always have delete permissions
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if (pathinfo($target, PATHINFO_EXTENSION) === 'part') {
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$permissions |= \OCP\PERMISSION_DELETE;
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}
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if (\OC_Util::isSharingDisabledForUser()) {
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$permissions &= ~\OCP\PERMISSION_SHARE;
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}
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return $permissions;
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}
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public function mkdir($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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->mkdir($internalPath);
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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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->rmdir($internalPath);
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}
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return false;
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}
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public function opendir($path) {
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$source = $this->getSourcePath($path);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->opendir($internalPath);
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}
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public function is_dir($path) {
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$source = $this->getSourcePath($path);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->is_dir($internalPath);
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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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->is_file($internalPath);
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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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return $stat;
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} else if ($source = $this->getSourcePath($path)) {
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->stat($internalPath);
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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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->filetype($internalPath);
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}
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return false;
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}
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public function filesize($path) {
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$source = $this->getSourcePath($path);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->filesize($internalPath);
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}
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public function isCreatable($path) {
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return ($this->getPermissions($path) & \OCP\PERMISSION_CREATE);
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}
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public function isReadable($path) {
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return $this->file_exists($path);
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}
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public function isUpdatable($path) {
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return ($this->getPermissions($path) & \OCP\PERMISSION_UPDATE);
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}
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public function isDeletable($path) {
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return ($this->getPermissions($path) & \OCP\PERMISSION_DELETE);
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}
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public function isSharable($path) {
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if (\OCP\Util::isSharingDisabledForUser()) {
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return false;
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}
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return ($this->getPermissions($path) & \OCP\PERMISSION_SHARE);
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}
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public function file_exists($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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->file_exists($internalPath);
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}
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return false;
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}
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public function filemtime($path) {
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$source = $this->getSourcePath($path);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->filemtime($internalPath);
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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->getMountPoint() . $path,
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'source' => $source,
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);
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\OCP\Util::emitHook('\OC\Files\Storage\Shared', 'file_get_contents', $info);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->file_get_contents($internalPath);
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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))
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|| ($this->is_dir($path) && !$this->isCreatable($path))
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) {
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return false;
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}
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$info = array(
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'target' => $this->getMountPoint() . '/' . $path,
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'source' => $source,
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);
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\OCP\Util::emitHook('\OC\Files\Storage\Shared', 'file_put_contents', $info);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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$result = $storage->file_put_contents($internalPath, $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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$path = ($path === false) ? '' : $path;
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if ($source = $this->getSourcePath($path)) {
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if ($this->isDeletable($path)) {
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->unlink($internalPath);
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}
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}
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return false;
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}
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/**
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* Format a path to be relative to the /user/files/ directory
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* @param string $path the absolute path
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* @return string e.g. turns '/admin/files/test.txt' into '/test.txt'
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*/
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private static function stripUserFilesPath($path) {
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$trimmed = ltrim($path, '/');
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$split = explode('/', $trimmed);
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// it is not a file relative to data/user/files
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if (count($split) < 3 || $split[1] !== 'files') {
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\OCP\Util::writeLog('file sharing',
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'Can not strip userid and "files/" from path: ' . $path,
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\OCP\Util::DEBUG);
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return false;
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}
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// skip 'user' and 'files'
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$sliced = array_slice($split, 2);
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$relPath = implode('/', $sliced);
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return '/' . $relPath;
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}
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/**
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* rename a shared folder/file
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* @param string $sourcePath
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* @param string $targetPath
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* @return bool
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*/
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private function renameMountPoint($sourcePath, $targetPath) {
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// it shouldn't be possible to move a Shared storage into another one
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list($targetStorage, ) = \OC\Files\Filesystem::resolvePath($targetPath);
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if ($targetStorage->instanceOfStorage('\OC\Files\Storage\Shared')) {
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\OCP\Util::writeLog('file sharing',
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'It is not allowed to move one mount point into another one',
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\OCP\Util::DEBUG);
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return false;
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}
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$relTargetPath = $this->stripUserFilesPath($targetPath);
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if ($relTargetPath === false) {
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\OCP\Util::writeLog('file sharing', 'Wrong target path given: ' . $targetPath, \OCP\Util::ERROR);
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return false;
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}
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$result = self::updateFileTarget($relTargetPath, $this->share);
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if ($result) {
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// update the mount manager with the new paths
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$mountManager = \OC\Files\Filesystem::getMountManager();
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$mount = $mountManager->find($sourcePath);
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$mount->setMountPoint($targetPath . '/');
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$mountManager->addMount($mount);
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$mountManager->removeMount($sourcePath . '/');
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$this->setUniqueName();
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$this->setMountPoint($relTargetPath);
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} else {
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\OCP\Util::writeLog('file sharing',
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'Could not rename mount point for shared folder "' . $sourcePath . '" to "' . $targetPath . '"',
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\OCP\Util::ERROR);
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}
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return (bool)$result;
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}
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/**
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* @update fileTarget in the database if the mount point changed
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* @param string $newPath
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* @param array $share reference to the share which should be modified
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* @return type
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*/
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private static function updateFileTarget($newPath, &$share) {
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// if the user renames a mount point from a group share we need to create a new db entry
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// for the unique name
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if ($share['share_type'] === \OCP\Share::SHARE_TYPE_GROUP &&
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(isset($share['unique_name']) && $share['unique_name'])) {
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$query = \OC_DB::prepare('INSERT INTO `*PREFIX*share` (`item_type`, `item_source`, `item_target`,'
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.' `share_type`, `share_with`, `uid_owner`, `permissions`, `stime`, `file_source`,'
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.' `file_target`, `token`, `parent`) VALUES (?,?,?,?,?,?,?,?,?,?,?,?)');
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$arguments = array($share['item_type'], $share['item_source'], $share['item_target'],
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2, \OCP\User::getUser(), $share['uid_owner'], $share['permissions'], $share['stime'], $share['file_source'],
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$newPath, $share['token'], $share['id']);
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} else {
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// rename mount point
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$query = \OC_DB::prepare(
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'Update `*PREFIX*share`
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SET `file_target` = ?
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WHERE `id` = ?'
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);
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$arguments = array($newPath, $share['id']);
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}
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return $query->execute($arguments);
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}
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public function rename($path1, $path2) {
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$sourceMountPoint = \OC\Files\Filesystem::getMountPoint($path1);
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$targetMountPoint = \OC\Files\Filesystem::getMountPoint($path2);
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$relPath1 = \OCA\Files_Sharing\Helper::stripUserFilesPath($path1);
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$relPath2 = \OCA\Files_Sharing\Helper::stripUserFilesPath($path2);
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// if we renamed the mount point we need to adjust the file_target in the
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// database
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if (\OC\Files\Filesystem::normalizePath($sourceMountPoint) === \OC\Files\Filesystem::normalizePath($path1)) {
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return $this->renameMountPoint($path1, $path2);
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}
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if ( // Within the same mount point, we only need UPDATE permissions
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($sourceMountPoint === $targetMountPoint && $this->isUpdatable($sourceMountPoint)) ||
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// otherwise DELETE and CREATE permissions required
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($this->isDeletable($path1) && $this->isCreatable(dirname($path2)))) {
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$pathinfo = pathinfo($relPath1);
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// for part files we need to ask for the owner and path from the parent directory because
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// the file cache doesn't return any results for part files
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if ($pathinfo['extension'] === 'part') {
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list($user1, $path1) = \OCA\Files_Sharing\Helper::getUidAndFilename($pathinfo['dirname']);
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$path1 = $path1 . '/' . $pathinfo['basename'];
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} else {
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list($user1, $path1) = \OCA\Files_Sharing\Helper::getUidAndFilename($relPath1);
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}
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$targetFilename = basename($relPath2);
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list($user2, $path2) = \OCA\Files_Sharing\Helper::getUidAndFilename(dirname($relPath2));
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$rootView = new \OC\Files\View('');
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return $rootView->rename('/' . $user1 . '/files/' . $path1, '/' . $user2 . '/files/' . $path2 . '/' . $targetFilename);
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}
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return false;
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}
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public function copy($path1, $path2) {
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// Copy the file if CREATE permission is granted
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if ($this->isCreatable(dirname($path2))) {
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$oldSource = $this->getSourcePath($path1);
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$newSource = $this->getSourcePath(dirname($path2)) . '/' . basename($path2);
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$rootView = new \OC\Files\View('');
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return $rootView->copy($oldSource, $newSource);
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}
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return false;
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}
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public function fopen($path, $mode) {
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if ($source = $this->getSourcePath($path)) {
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switch ($mode) {
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case 'r+':
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case 'rb+':
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case 'w+':
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case 'wb+':
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case 'x+':
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case 'xb+':
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case 'a+':
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case 'ab+':
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case 'w':
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case 'wb':
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case 'x':
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case 'xb':
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case 'a':
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case 'ab':
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$exists = $this->file_exists($path);
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if ($exists && !$this->isUpdatable($path)) {
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return false;
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}
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if (!$exists && !$this->isCreatable(dirname($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->getMountPoint() . $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\Files\Storage\Shared', 'fopen', $info);
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->fopen($internalPath, $mode);
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}
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return false;
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}
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public function getMimeType($path) {
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if ($source = $this->getSourcePath($path)) {
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->getMimeType($internalPath);
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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 ($source) {
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->free_space($internalPath);
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}
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return \OC\Files\SPACE_UNKNOWN;
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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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->getLocalFile($internalPath);
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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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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
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return $storage->touch($internalPath, $mtime);
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}
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return false;
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}
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public static function setup($options) {
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$shares = \OCP\Share::getItemsSharedWith('file');
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if (!\OCP\User::isLoggedIn() || \OCP\User::getUser() != $options['user']
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|| $shares
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) {
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foreach ($shares as $share) {
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self::verifyMountPoint($share);
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\OC\Files\Filesystem::mount('\OC\Files\Storage\Shared',
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array(
|
|
'share' => $share,
|
|
),
|
|
$options['user_dir'] . '/' . $share['file_target']);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* check if the parent folder exists otherwise move the mount point up
|
|
*
|
|
* @param array $share reference to the share we want to check
|
|
*/
|
|
private static function verifyMountPoint(&$share) {
|
|
$mountPoint = basename($share['file_target']);
|
|
$parent = dirname($share['file_target']);
|
|
|
|
while (!\OC\Files\Filesystem::is_dir($parent)) {
|
|
$parent = dirname($parent);
|
|
}
|
|
|
|
$newMountPoint = \OCA\Files_Sharing\Helper::generateUniqueTarget(
|
|
\OC\Files\Filesystem::normalizePath($parent . '/' . $mountPoint),
|
|
array(),
|
|
new \OC\Files\View('/' . \OCP\User::getUser() . '/files')
|
|
);
|
|
|
|
if($newMountPoint !== $share['file_target']) {
|
|
|
|
self::updateFileTarget($newMountPoint, $share);
|
|
$share['file_target'] = $newMountPoint;
|
|
|
|
}
|
|
}
|
|
|
|
/**
|
|
* return mount point of share, relative to data/user/files
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getMountPoint() {
|
|
return $this->share['file_target'];
|
|
}
|
|
|
|
private function setMountPoint($path) {
|
|
$this->share['file_target'] = $path;
|
|
}
|
|
|
|
/**
|
|
* the share now uses a unique name of this user
|
|
*
|
|
* @brief the share now uses a unique name of this user
|
|
*/
|
|
private function setUniqueName() {
|
|
$this->share['unique_name'] = true;
|
|
}
|
|
|
|
/**
|
|
* @brief get the user who shared the file
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getSharedFrom() {
|
|
return $this->share['uid_owner'];
|
|
}
|
|
|
|
/**
|
|
* return share type, can be "file" or "folder"
|
|
* @return string
|
|
*/
|
|
public function getItemType() {
|
|
return $this->share['item_type'];
|
|
}
|
|
|
|
public function hasUpdated($path, $time) {
|
|
return $this->filemtime($path) > $time;
|
|
}
|
|
|
|
public function getCache($path = '') {
|
|
return new \OC\Files\Cache\Shared_Cache($this);
|
|
}
|
|
|
|
public function getScanner($path = '') {
|
|
return new \OC\Files\Cache\Scanner($this);
|
|
}
|
|
|
|
public function getPermissionsCache($path = '') {
|
|
return new \OC\Files\Cache\Shared_Permissions($this);
|
|
}
|
|
|
|
public function getWatcher($path = '') {
|
|
return new \OC\Files\Cache\Shared_Watcher($this);
|
|
}
|
|
|
|
public function getOwner($path) {
|
|
if ($path == '') {
|
|
$path = $this->getMountPoint();
|
|
}
|
|
$source = $this->getFile($path);
|
|
if ($source) {
|
|
return $source['fileOwner'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public function getETag($path) {
|
|
if ($path == '') {
|
|
$path = $this->getMountPoint();
|
|
}
|
|
if ($source = $this->getSourcePath($path)) {
|
|
list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($source);
|
|
return $storage->getETag($internalPath);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
}
|