nextcloud / server

apps/files_external/lib/Lib/Storage/SMB.php

Indentation +472 added lines, -472 removed lines

@@ -55,476 +55,476 @@
 use OCP\Util;
 
 class SMB extends Common implements INotifyStorage {
-	/**
-	 * @var \Icewind\SMB\Server
-	 */
-	protected $server;
-
-	/**
-	 * @var \Icewind\SMB\Share
-	 */
-	protected $share;
-
-	/**
-	 * @var string
-	 */
-	protected $root;
-
-	/**
-	 * @var \Icewind\SMB\FileInfo[]
-	 */
-	protected $statCache;
-
-	public function __construct($params) {
-		if (isset($params['host']) && isset($params['user']) && isset($params['password']) && isset($params['share'])) {
-			if (Server::NativeAvailable()) {
-				$this->server = new NativeServer($params['host'], $params['user'], $params['password']);
-			} else {
-				$this->server = new Server($params['host'], $params['user'], $params['password']);
-			}
-			$this->share = $this->server->getShare(trim($params['share'], '/'));
-
-			$this->root = isset($params['root']) ? $params['root'] : '/';
-			if (!$this->root || $this->root[0] !== '/') {
-				$this->root = '/' . $this->root;
-			}
-			if (substr($this->root, -1, 1) !== '/') {
-				$this->root .= '/';
-			}
-		} else {
-			throw new \Exception('Invalid configuration');
-		}
-		$this->statCache = new CappedMemoryCache();
-		parent::__construct($params);
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getId() {
-		// FIXME: double slash to keep compatible with the old storage ids,
-		// failure to do so will lead to creation of a new storage id and
-		// loss of shares from the storage
-		return 'smb::' . $this->server->getUser() . '@' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
-	}
-
-	/**
-	 * @param string $path
-	 * @return string
-	 */
-	protected function buildPath($path) {
-		return Filesystem::normalizePath($this->root . '/' . $path, true, false, true);
-	}
-
-	protected function relativePath($fullPath) {
-		if ($fullPath === $this->root) {
-			return '';
-		} else if (substr($fullPath, 0, strlen($this->root)) === $this->root) {
-			return substr($fullPath, strlen($this->root));
-		} else {
-			return null;
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return \Icewind\SMB\IFileInfo
-	 * @throws StorageNotAvailableException
-	 */
-	protected function getFileInfo($path) {
-		try {
-			$path = $this->buildPath($path);
-			if (!isset($this->statCache[$path])) {
-				$this->statCache[$path] = $this->share->stat($path);
-			}
-			return $this->statCache[$path];
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return \Icewind\SMB\IFileInfo[]
-	 * @throws StorageNotAvailableException
-	 */
-	protected function getFolderContents($path) {
-		try {
-			$path = $this->buildPath($path);
-			$files = $this->share->dir($path);
-			foreach ($files as $file) {
-				$this->statCache[$path . '/' . $file->getName()] = $file;
-			}
-			return array_filter($files, function (IFileInfo $file) {
-				return !$file->isHidden();
-			});
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	/**
-	 * @param \Icewind\SMB\IFileInfo $info
-	 * @return array
-	 */
-	protected function formatInfo($info) {
-		$result = [
-			'size' => $info->getSize(),
-			'mtime' => $info->getMTime(),
-		];
-		if ($info->isDirectory()) {
-			$result['type'] = 'dir';
-		} else {
-			$result['type'] = 'file';
-		}
-		return $result;
-	}
-
-	/**
-	 * Rename the files. If the source or the target is the root, the rename won't happen.
-	 *
-	 * @param string $source the old name of the path
-	 * @param string $target the new name of the path
-	 * @return bool true if the rename is successful, false otherwise
-	 */
-	public function rename($source, $target) {
-		if ($this->isRootDir($source) || $this->isRootDir($target)) {
-			return false;
-		}
-
-		$absoluteSource = $this->buildPath($source);
-		$absoluteTarget = $this->buildPath($target);
-		try {
-			$result = $this->share->rename($absoluteSource, $absoluteTarget);
-		} catch (AlreadyExistsException $e) {
-			$this->remove($target);
-			$result = $this->share->rename($absoluteSource, $absoluteTarget);
-		} catch (\Exception $e) {
-			\OC::$server->getLogger()->logException($e, ['level' => Util::WARN]);
-			return false;
-		}
-		unset($this->statCache[$absoluteSource], $this->statCache[$absoluteTarget]);
-		return $result;
-	}
-
-	/**
-	 * @param string $path
-	 * @return array
-	 */
-	public function stat($path) {
-		$result = $this->formatInfo($this->getFileInfo($path));
-		if ($this->remoteIsShare() && $this->isRootDir($path)) {
-			$result['mtime'] = $this->shareMTime();
-		}
-		return $result;
-	}
-
-	/**
-	 * get the best guess for the modification time of the share
-	 *
-	 * @return int
-	 */
-	private function shareMTime() {
-		$highestMTime = 0;
-		$files = $this->share->dir($this->root);
-		foreach ($files as $fileInfo) {
-			if ($fileInfo->getMTime() > $highestMTime) {
-				$highestMTime = $fileInfo->getMTime();
-			}
-		}
-		return $highestMTime;
-	}
-
-	/**
-	 * Check if the path is our root dir (not the smb one)
-	 *
-	 * @param string $path the path
-	 * @return bool
-	 */
-	private function isRootDir($path) {
-		return $path === '' || $path === '/' || $path === '.';
-	}
-
-	/**
-	 * Check if our root points to a smb share
-	 *
-	 * @return bool true if our root points to a share false otherwise
-	 */
-	private function remoteIsShare() {
-		return $this->share->getName() && (!$this->root || $this->root === '/');
-	}
-
-	/**
-	 * @param string $path
-	 * @return bool
-	 */
-	public function unlink($path) {
-		if ($this->isRootDir($path)) {
-			return false;
-		}
-
-		try {
-			if ($this->is_dir($path)) {
-				return $this->rmdir($path);
-			} else {
-				$path = $this->buildPath($path);
-				unset($this->statCache[$path]);
-				$this->share->del($path);
-				return true;
-			}
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	/**
-	 * check if a file or folder has been updated since $time
-	 *
-	 * @param string $path
-	 * @param int $time
-	 * @return bool
-	 */
-	public function hasUpdated($path, $time) {
-		if (!$path and $this->root === '/') {
-			// mtime doesn't work for shares, but giving the nature of the backend,
-			// doing a full update is still just fast enough
-			return true;
-		} else {
-			$actualTime = $this->filemtime($path);
-			return $actualTime > $time;
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @param string $mode
-	 * @return resource|false
-	 */
-	public function fopen($path, $mode) {
-		$fullPath = $this->buildPath($path);
-		try {
-			switch ($mode) {
-				case 'r':
-				case 'rb':
-					if (!$this->file_exists($path)) {
-						return false;
-					}
-					return $this->share->read($fullPath);
-				case 'w':
-				case 'wb':
-					$source = $this->share->write($fullPath);
-					return CallBackWrapper::wrap($source, null, null, function () use ($fullPath) {
-						unset($this->statCache[$fullPath]);
-					});
-				case 'a':
-				case 'ab':
-				case 'r+':
-				case 'w+':
-				case 'wb+':
-				case 'a+':
-				case 'x':
-				case 'x+':
-				case 'c':
-				case 'c+':
-					//emulate these
-					if (strrpos($path, '.') !== false) {
-						$ext = substr($path, strrpos($path, '.'));
-					} else {
-						$ext = '';
-					}
-					if ($this->file_exists($path)) {
-						if (!$this->isUpdatable($path)) {
-							return false;
-						}
-						$tmpFile = $this->getCachedFile($path);
-					} else {
-						if (!$this->isCreatable(dirname($path))) {
-							return false;
-						}
-						$tmpFile = \OCP\Files::tmpFile($ext);
-					}
-					$source = fopen($tmpFile, $mode);
-					$share = $this->share;
-					return CallbackWrapper::wrap($source, null, null, function () use ($tmpFile, $fullPath, $share) {
-						unset($this->statCache[$fullPath]);
-						$share->put($tmpFile, $fullPath);
-						unlink($tmpFile);
-					});
-			}
-			return false;
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	public function rmdir($path) {
-		if ($this->isRootDir($path)) {
-			return false;
-		}
-
-		try {
-			$this->statCache = array();
-			$content = $this->share->dir($this->buildPath($path));
-			foreach ($content as $file) {
-				if ($file->isDirectory()) {
-					$this->rmdir($path . '/' . $file->getName());
-				} else {
-					$this->share->del($file->getPath());
-				}
-			}
-			$this->share->rmdir($this->buildPath($path));
-			return true;
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	public function touch($path, $time = null) {
-		try {
-			if (!$this->file_exists($path)) {
-				$fh = $this->share->write($this->buildPath($path));
-				fclose($fh);
-				return true;
-			}
-			return false;
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	public function opendir($path) {
-		try {
-			$files = $this->getFolderContents($path);
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		}
-		$names = array_map(function ($info) {
-			/** @var \Icewind\SMB\IFileInfo $info */
-			return $info->getName();
-		}, $files);
-		return IteratorDirectory::wrap($names);
-	}
-
-	public function filetype($path) {
-		try {
-			return $this->getFileInfo($path)->isDirectory() ? 'dir' : 'file';
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		}
-	}
-
-	public function mkdir($path) {
-		$path = $this->buildPath($path);
-		try {
-			$this->share->mkdir($path);
-			return true;
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		} catch (Exception $e) {
-			return false;
-		}
-	}
-
-	public function file_exists($path) {
-		try {
-			$this->getFileInfo($path);
-			return true;
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		} catch (ConnectException $e) {
-			throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
-		}
-	}
-
-	public function isReadable($path) {
-		try {
-			$info = $this->getFileInfo($path);
-			return !$info->isHidden();
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		}
-	}
-
-	public function isUpdatable($path) {
-		try {
-			$info = $this->getFileInfo($path);
-			// following windows behaviour for read-only folders: they can be written into
-			// (https://support.microsoft.com/en-us/kb/326549 - "cause" section)
-			return !$info->isHidden() && (!$info->isReadOnly() || $this->is_dir($path));
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		}
-	}
-
-	public function isDeletable($path) {
-		try {
-			$info = $this->getFileInfo($path);
-			return !$info->isHidden() && !$info->isReadOnly();
-		} catch (NotFoundException $e) {
-			return false;
-		} catch (ForbiddenException $e) {
-			return false;
-		}
-	}
-
-	/**
-	 * check if smbclient is installed
-	 */
-	public static function checkDependencies() {
-		return (
-			(bool)\OC_Helper::findBinaryPath('smbclient')
-			|| Server::NativeAvailable()
-		) ? true : ['smbclient'];
-	}
-
-	/**
-	 * Test a storage for availability
-	 *
-	 * @return bool
-	 */
-	public function test() {
-		try {
-			return parent::test();
-		} catch (Exception $e) {
-			return false;
-		}
-	}
-
-	public function listen($path, callable $callback) {
-		$this->notify($path)->listen(function (IChange $change) use ($callback) {
-			if ($change instanceof IRenameChange) {
-				return $callback($change->getType(), $change->getPath(), $change->getTargetPath());
-			} else {
-				return $callback($change->getType(), $change->getPath());
-			}
-		});
-	}
-
-	public function notify($path) {
-		$path = '/' . ltrim($path, '/');
-		$shareNotifyHandler = $this->share->notify($this->buildPath($path));
-		return new SMBNotifyHandler($shareNotifyHandler, $this->root);
-	}
+    /**
+     * @var \Icewind\SMB\Server
+     */
+    protected $server;
+
+    /**
+     * @var \Icewind\SMB\Share
+     */
+    protected $share;
+
+    /**
+     * @var string
+     */
+    protected $root;
+
+    /**
+     * @var \Icewind\SMB\FileInfo[]
+     */
+    protected $statCache;
+
+    public function __construct($params) {
+        if (isset($params['host']) && isset($params['user']) && isset($params['password']) && isset($params['share'])) {
+            if (Server::NativeAvailable()) {
+                $this->server = new NativeServer($params['host'], $params['user'], $params['password']);
+            } else {
+                $this->server = new Server($params['host'], $params['user'], $params['password']);
+            }
+            $this->share = $this->server->getShare(trim($params['share'], '/'));
+
+            $this->root = isset($params['root']) ? $params['root'] : '/';
+            if (!$this->root || $this->root[0] !== '/') {
+                $this->root = '/' . $this->root;
+            }
+            if (substr($this->root, -1, 1) !== '/') {
+                $this->root .= '/';
+            }
+        } else {
+            throw new \Exception('Invalid configuration');
+        }
+        $this->statCache = new CappedMemoryCache();
+        parent::__construct($params);
+    }
+
+    /**
+     * @return string
+     */
+    public function getId() {
+        // FIXME: double slash to keep compatible with the old storage ids,
+        // failure to do so will lead to creation of a new storage id and
+        // loss of shares from the storage
+        return 'smb::' . $this->server->getUser() . '@' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
+    }
+
+    /**
+     * @param string $path
+     * @return string
+     */
+    protected function buildPath($path) {
+        return Filesystem::normalizePath($this->root . '/' . $path, true, false, true);
+    }
+
+    protected function relativePath($fullPath) {
+        if ($fullPath === $this->root) {
+            return '';
+        } else if (substr($fullPath, 0, strlen($this->root)) === $this->root) {
+            return substr($fullPath, strlen($this->root));
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return \Icewind\SMB\IFileInfo
+     * @throws StorageNotAvailableException
+     */
+    protected function getFileInfo($path) {
+        try {
+            $path = $this->buildPath($path);
+            if (!isset($this->statCache[$path])) {
+                $this->statCache[$path] = $this->share->stat($path);
+            }
+            return $this->statCache[$path];
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return \Icewind\SMB\IFileInfo[]
+     * @throws StorageNotAvailableException
+     */
+    protected function getFolderContents($path) {
+        try {
+            $path = $this->buildPath($path);
+            $files = $this->share->dir($path);
+            foreach ($files as $file) {
+                $this->statCache[$path . '/' . $file->getName()] = $file;
+            }
+            return array_filter($files, function (IFileInfo $file) {
+                return !$file->isHidden();
+            });
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    /**
+     * @param \Icewind\SMB\IFileInfo $info
+     * @return array
+     */
+    protected function formatInfo($info) {
+        $result = [
+            'size' => $info->getSize(),
+            'mtime' => $info->getMTime(),
+        ];
+        if ($info->isDirectory()) {
+            $result['type'] = 'dir';
+        } else {
+            $result['type'] = 'file';
+        }
+        return $result;
+    }
+
+    /**
+     * Rename the files. If the source or the target is the root, the rename won't happen.
+     *
+     * @param string $source the old name of the path
+     * @param string $target the new name of the path
+     * @return bool true if the rename is successful, false otherwise
+     */
+    public function rename($source, $target) {
+        if ($this->isRootDir($source) || $this->isRootDir($target)) {
+            return false;
+        }
+
+        $absoluteSource = $this->buildPath($source);
+        $absoluteTarget = $this->buildPath($target);
+        try {
+            $result = $this->share->rename($absoluteSource, $absoluteTarget);
+        } catch (AlreadyExistsException $e) {
+            $this->remove($target);
+            $result = $this->share->rename($absoluteSource, $absoluteTarget);
+        } catch (\Exception $e) {
+            \OC::$server->getLogger()->logException($e, ['level' => Util::WARN]);
+            return false;
+        }
+        unset($this->statCache[$absoluteSource], $this->statCache[$absoluteTarget]);
+        return $result;
+    }
+
+    /**
+     * @param string $path
+     * @return array
+     */
+    public function stat($path) {
+        $result = $this->formatInfo($this->getFileInfo($path));
+        if ($this->remoteIsShare() && $this->isRootDir($path)) {
+            $result['mtime'] = $this->shareMTime();
+        }
+        return $result;
+    }
+
+    /**
+     * get the best guess for the modification time of the share
+     *
+     * @return int
+     */
+    private function shareMTime() {
+        $highestMTime = 0;
+        $files = $this->share->dir($this->root);
+        foreach ($files as $fileInfo) {
+            if ($fileInfo->getMTime() > $highestMTime) {
+                $highestMTime = $fileInfo->getMTime();
+            }
+        }
+        return $highestMTime;
+    }
+
+    /**
+     * Check if the path is our root dir (not the smb one)
+     *
+     * @param string $path the path
+     * @return bool
+     */
+    private function isRootDir($path) {
+        return $path === '' || $path === '/' || $path === '.';
+    }
+
+    /**
+     * Check if our root points to a smb share
+     *
+     * @return bool true if our root points to a share false otherwise
+     */
+    private function remoteIsShare() {
+        return $this->share->getName() && (!$this->root || $this->root === '/');
+    }
+
+    /**
+     * @param string $path
+     * @return bool
+     */
+    public function unlink($path) {
+        if ($this->isRootDir($path)) {
+            return false;
+        }
+
+        try {
+            if ($this->is_dir($path)) {
+                return $this->rmdir($path);
+            } else {
+                $path = $this->buildPath($path);
+                unset($this->statCache[$path]);
+                $this->share->del($path);
+                return true;
+            }
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    /**
+     * check if a file or folder has been updated since $time
+     *
+     * @param string $path
+     * @param int $time
+     * @return bool
+     */
+    public function hasUpdated($path, $time) {
+        if (!$path and $this->root === '/') {
+            // mtime doesn't work for shares, but giving the nature of the backend,
+            // doing a full update is still just fast enough
+            return true;
+        } else {
+            $actualTime = $this->filemtime($path);
+            return $actualTime > $time;
+        }
+    }
+
+    /**
+     * @param string $path
+     * @param string $mode
+     * @return resource|false
+     */
+    public function fopen($path, $mode) {
+        $fullPath = $this->buildPath($path);
+        try {
+            switch ($mode) {
+                case 'r':
+                case 'rb':
+                    if (!$this->file_exists($path)) {
+                        return false;
+                    }
+                    return $this->share->read($fullPath);
+                case 'w':
+                case 'wb':
+                    $source = $this->share->write($fullPath);
+                    return CallBackWrapper::wrap($source, null, null, function () use ($fullPath) {
+                        unset($this->statCache[$fullPath]);
+                    });
+                case 'a':
+                case 'ab':
+                case 'r+':
+                case 'w+':
+                case 'wb+':
+                case 'a+':
+                case 'x':
+                case 'x+':
+                case 'c':
+                case 'c+':
+                    //emulate these
+                    if (strrpos($path, '.') !== false) {
+                        $ext = substr($path, strrpos($path, '.'));
+                    } else {
+                        $ext = '';
+                    }
+                    if ($this->file_exists($path)) {
+                        if (!$this->isUpdatable($path)) {
+                            return false;
+                        }
+                        $tmpFile = $this->getCachedFile($path);
+                    } else {
+                        if (!$this->isCreatable(dirname($path))) {
+                            return false;
+                        }
+                        $tmpFile = \OCP\Files::tmpFile($ext);
+                    }
+                    $source = fopen($tmpFile, $mode);
+                    $share = $this->share;
+                    return CallbackWrapper::wrap($source, null, null, function () use ($tmpFile, $fullPath, $share) {
+                        unset($this->statCache[$fullPath]);
+                        $share->put($tmpFile, $fullPath);
+                        unlink($tmpFile);
+                    });
+            }
+            return false;
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    public function rmdir($path) {
+        if ($this->isRootDir($path)) {
+            return false;
+        }
+
+        try {
+            $this->statCache = array();
+            $content = $this->share->dir($this->buildPath($path));
+            foreach ($content as $file) {
+                if ($file->isDirectory()) {
+                    $this->rmdir($path . '/' . $file->getName());
+                } else {
+                    $this->share->del($file->getPath());
+                }
+            }
+            $this->share->rmdir($this->buildPath($path));
+            return true;
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    public function touch($path, $time = null) {
+        try {
+            if (!$this->file_exists($path)) {
+                $fh = $this->share->write($this->buildPath($path));
+                fclose($fh);
+                return true;
+            }
+            return false;
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    public function opendir($path) {
+        try {
+            $files = $this->getFolderContents($path);
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        }
+        $names = array_map(function ($info) {
+            /** @var \Icewind\SMB\IFileInfo $info */
+            return $info->getName();
+        }, $files);
+        return IteratorDirectory::wrap($names);
+    }
+
+    public function filetype($path) {
+        try {
+            return $this->getFileInfo($path)->isDirectory() ? 'dir' : 'file';
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        }
+    }
+
+    public function mkdir($path) {
+        $path = $this->buildPath($path);
+        try {
+            $this->share->mkdir($path);
+            return true;
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        } catch (Exception $e) {
+            return false;
+        }
+    }
+
+    public function file_exists($path) {
+        try {
+            $this->getFileInfo($path);
+            return true;
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        } catch (ConnectException $e) {
+            throw new StorageNotAvailableException($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+
+    public function isReadable($path) {
+        try {
+            $info = $this->getFileInfo($path);
+            return !$info->isHidden();
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        }
+    }
+
+    public function isUpdatable($path) {
+        try {
+            $info = $this->getFileInfo($path);
+            // following windows behaviour for read-only folders: they can be written into
+            // (https://support.microsoft.com/en-us/kb/326549 - "cause" section)
+            return !$info->isHidden() && (!$info->isReadOnly() || $this->is_dir($path));
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        }
+    }
+
+    public function isDeletable($path) {
+        try {
+            $info = $this->getFileInfo($path);
+            return !$info->isHidden() && !$info->isReadOnly();
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (ForbiddenException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * check if smbclient is installed
+     */
+    public static function checkDependencies() {
+        return (
+            (bool)\OC_Helper::findBinaryPath('smbclient')
+            || Server::NativeAvailable()
+        ) ? true : ['smbclient'];
+    }
+
+    /**
+     * Test a storage for availability
+     *
+     * @return bool
+     */
+    public function test() {
+        try {
+            return parent::test();
+        } catch (Exception $e) {
+            return false;
+        }
+    }
+
+    public function listen($path, callable $callback) {
+        $this->notify($path)->listen(function (IChange $change) use ($callback) {
+            if ($change instanceof IRenameChange) {
+                return $callback($change->getType(), $change->getPath(), $change->getTargetPath());
+            } else {
+                return $callback($change->getType(), $change->getPath());
+            }
+        });
+    }
+
+    public function notify($path) {
+        $path = '/' . ltrim($path, '/');
+        $shareNotifyHandler = $this->share->notify($this->buildPath($path));
+        return new SMBNotifyHandler($shareNotifyHandler, $this->root);
+    }
 }

lib/private/Files/Storage/Common.php

Indentation +733 added lines, -733 removed lines

@@ -70,741 +70,741 @@
  */
 abstract class Common implements Storage, ILockingStorage {
 
-	use LocalTempFileTrait;
-
-	protected $cache;
-	protected $scanner;
-	protected $watcher;
-	protected $propagator;
-	protected $storageCache;
-	protected $updater;
-
-	protected $mountOptions = [];
-	protected $owner = null;
-
-	private $shouldLogLocks = null;
-	private $logger;
-
-	public function __construct($parameters) {
-	}
-
-	/**
-	 * Remove a file or folder
-	 *
-	 * @param string $path
-	 * @return bool
-	 */
-	protected function remove($path) {
-		if ($this->is_dir($path)) {
-			return $this->rmdir($path);
-		} else if ($this->is_file($path)) {
-			return $this->unlink($path);
-		} else {
-			return false;
-		}
-	}
-
-	public function is_dir($path) {
-		return $this->filetype($path) === 'dir';
-	}
-
-	public function is_file($path) {
-		return $this->filetype($path) === 'file';
-	}
-
-	public function filesize($path) {
-		if ($this->is_dir($path)) {
-			return 0; //by definition
-		} else {
-			$stat = $this->stat($path);
-			if (isset($stat['size'])) {
-				return $stat['size'];
-			} else {
-				return 0;
-			}
-		}
-	}
-
-	public function isReadable($path) {
-		// at least check whether it exists
-		// subclasses might want to implement this more thoroughly
-		return $this->file_exists($path);
-	}
-
-	public function isUpdatable($path) {
-		// at least check whether it exists
-		// subclasses might want to implement this more thoroughly
-		// a non-existing file/folder isn't updatable
-		return $this->file_exists($path);
-	}
-
-	public function isCreatable($path) {
-		if ($this->is_dir($path) && $this->isUpdatable($path)) {
-			return true;
-		}
-		return false;
-	}
-
-	public function isDeletable($path) {
-		if ($path === '' || $path === '/') {
-			return false;
-		}
-		$parent = dirname($path);
-		return $this->isUpdatable($parent) && $this->isUpdatable($path);
-	}
-
-	public function isSharable($path) {
-		return $this->isReadable($path);
-	}
-
-	public function getPermissions($path) {
-		$permissions = 0;
-		if ($this->isCreatable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_CREATE;
-		}
-		if ($this->isReadable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_READ;
-		}
-		if ($this->isUpdatable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_UPDATE;
-		}
-		if ($this->isDeletable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_DELETE;
-		}
-		if ($this->isSharable($path)) {
-			$permissions |= \OCP\Constants::PERMISSION_SHARE;
-		}
-		return $permissions;
-	}
-
-	public function filemtime($path) {
-		$stat = $this->stat($path);
-		if (isset($stat['mtime']) && $stat['mtime'] > 0) {
-			return $stat['mtime'];
-		} else {
-			return 0;
-		}
-	}
-
-	public function file_get_contents($path) {
-		$handle = $this->fopen($path, "r");
-		if (!$handle) {
-			return false;
-		}
-		$data = stream_get_contents($handle);
-		fclose($handle);
-		return $data;
-	}
-
-	public function file_put_contents($path, $data) {
-		$handle = $this->fopen($path, "w");
-		$this->removeCachedFile($path);
-		$count = fwrite($handle, $data);
-		fclose($handle);
-		return $count;
-	}
-
-	public function rename($path1, $path2) {
-		$this->remove($path2);
-
-		$this->removeCachedFile($path1);
-		return $this->copy($path1, $path2) and $this->remove($path1);
-	}
-
-	public function copy($path1, $path2) {
-		if ($this->is_dir($path1)) {
-			$this->remove($path2);
-			$dir = $this->opendir($path1);
-			$this->mkdir($path2);
-			while ($file = readdir($dir)) {
-				if (!Filesystem::isIgnoredDir($file)) {
-					if (!$this->copy($path1 . '/' . $file, $path2 . '/' . $file)) {
-						return false;
-					}
-				}
-			}
-			closedir($dir);
-			return true;
-		} else {
-			$source = $this->fopen($path1, 'r');
-			$target = $this->fopen($path2, 'w');
-			list(, $result) = \OC_Helper::streamCopy($source, $target);
-			if (!$result) {
-				\OC::$server->getLogger()->warning("Failed to write data while copying $path1 to $path2");
-			}
-			$this->removeCachedFile($path2);
-			return $result;
-		}
-	}
-
-	public function getMimeType($path) {
-		if ($this->is_dir($path)) {
-			return 'httpd/unix-directory';
-		} elseif ($this->file_exists($path)) {
-			return \OC::$server->getMimeTypeDetector()->detectPath($path);
-		} else {
-			return false;
-		}
-	}
-
-	public function hash($type, $path, $raw = false) {
-		$fh = $this->fopen($path, 'rb');
-		$ctx = hash_init($type);
-		hash_update_stream($ctx, $fh);
-		fclose($fh);
-		return hash_final($ctx, $raw);
-	}
-
-	public function search($query) {
-		return $this->searchInDir($query);
-	}
-
-	public function getLocalFile($path) {
-		return $this->getCachedFile($path);
-	}
-
-	/**
-	 * @param string $path
-	 * @param string $target
-	 */
-	private function addLocalFolder($path, $target) {
-		$dh = $this->opendir($path);
-		if (is_resource($dh)) {
-			while (($file = readdir($dh)) !== false) {
-				if (!\OC\Files\Filesystem::isIgnoredDir($file)) {
-					if ($this->is_dir($path . '/' . $file)) {
-						mkdir($target . '/' . $file);
-						$this->addLocalFolder($path . '/' . $file, $target . '/' . $file);
-					} else {
-						$tmp = $this->toTmpFile($path . '/' . $file);
-						rename($tmp, $target . '/' . $file);
-					}
-				}
-			}
-		}
-	}
-
-	/**
-	 * @param string $query
-	 * @param string $dir
-	 * @return array
-	 */
-	protected function searchInDir($query, $dir = '') {
-		$files = array();
-		$dh = $this->opendir($dir);
-		if (is_resource($dh)) {
-			while (($item = readdir($dh)) !== false) {
-				if (\OC\Files\Filesystem::isIgnoredDir($item)) continue;
-				if (strstr(strtolower($item), strtolower($query)) !== false) {
-					$files[] = $dir . '/' . $item;
-				}
-				if ($this->is_dir($dir . '/' . $item)) {
-					$files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
-				}
-			}
-		}
-		closedir($dh);
-		return $files;
-	}
-
-	/**
-	 * check if a file or folder has been updated since $time
-	 *
-	 * The method is only used to check if the cache needs to be updated. Storage backends that don't support checking
-	 * the mtime should always return false here. As a result storage implementations that always return false expect
-	 * exclusive access to the backend and will not pick up files that have been added in a way that circumvents
-	 * ownClouds filesystem.
-	 *
-	 * @param string $path
-	 * @param int $time
-	 * @return bool
-	 */
-	public function hasUpdated($path, $time) {
-		return $this->filemtime($path) > $time;
-	}
-
-	public function getCache($path = '', $storage = null) {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($storage->cache)) {
-			$storage->cache = new Cache($storage);
-		}
-		return $storage->cache;
-	}
-
-	public function getScanner($path = '', $storage = null) {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($storage->scanner)) {
-			$storage->scanner = new Scanner($storage);
-		}
-		return $storage->scanner;
-	}
-
-	public function getWatcher($path = '', $storage = null) {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($this->watcher)) {
-			$this->watcher = new Watcher($storage);
-			$globalPolicy = \OC::$server->getConfig()->getSystemValue('filesystem_check_changes', Watcher::CHECK_NEVER);
-			$this->watcher->setPolicy((int)$this->getMountOption('filesystem_check_changes', $globalPolicy));
-		}
-		return $this->watcher;
-	}
-
-	/**
-	 * get a propagator instance for the cache
-	 *
-	 * @param \OC\Files\Storage\Storage (optional) the storage to pass to the watcher
-	 * @return \OC\Files\Cache\Propagator
-	 */
-	public function getPropagator($storage = null) {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($storage->propagator)) {
-			$storage->propagator = new Propagator($storage, \OC::$server->getDatabaseConnection());
-		}
-		return $storage->propagator;
-	}
-
-	public function getUpdater($storage = null) {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($storage->updater)) {
-			$storage->updater = new Updater($storage);
-		}
-		return $storage->updater;
-	}
-
-	public function getStorageCache($storage = null) {
-		if (!$storage) {
-			$storage = $this;
-		}
-		if (!isset($this->storageCache)) {
-			$this->storageCache = new \OC\Files\Cache\Storage($storage);
-		}
-		return $this->storageCache;
-	}
-
-	/**
-	 * get the owner of a path
-	 *
-	 * @param string $path The path to get the owner
-	 * @return string|false uid or false
-	 */
-	public function getOwner($path) {
-		if ($this->owner === null) {
-			$this->owner = \OC_User::getUser();
-		}
-
-		return $this->owner;
-	}
-
-	/**
-	 * get the ETag for a file or folder
-	 *
-	 * @param string $path
-	 * @return string
-	 */
-	public function getETag($path) {
-		return uniqid();
-	}
-
-	/**
-	 * clean a path, i.e. remove all redundant '.' and '..'
-	 * making sure that it can't point to higher than '/'
-	 *
-	 * @param string $path The path to clean
-	 * @return string cleaned path
-	 */
-	public function cleanPath($path) {
-		if (strlen($path) == 0 or $path[0] != '/') {
-			$path = '/' . $path;
-		}
-
-		$output = array();
-		foreach (explode('/', $path) as $chunk) {
-			if ($chunk == '..') {
-				array_pop($output);
-			} else if ($chunk == '.') {
-			} else {
-				$output[] = $chunk;
-			}
-		}
-		return implode('/', $output);
-	}
-
-	/**
-	 * Test a storage for availability
-	 *
-	 * @return bool
-	 */
-	public function test() {
-		try {
-			if ($this->stat('')) {
-				return true;
-			}
-			return false;
-		} catch (\Exception $e) {
-			return false;
-		}
-	}
-
-	/**
-	 * get the free space in the storage
-	 *
-	 * @param string $path
-	 * @return int|false
-	 */
-	public function free_space($path) {
-		return \OCP\Files\FileInfo::SPACE_UNKNOWN;
-	}
-
-	/**
-	 * {@inheritdoc}
-	 */
-	public function isLocal() {
-		// the common implementation returns a temporary file by
-		// default, which is not local
-		return false;
-	}
-
-	/**
-	 * Check if the storage is an instance of $class or is a wrapper for a storage that is an instance of $class
-	 *
-	 * @param string $class
-	 * @return bool
-	 */
-	public function instanceOfStorage($class) {
-		if (ltrim($class, '\\') === 'OC\Files\Storage\Shared') {
-			// FIXME Temporary fix to keep existing checks working
-			$class = '\OCA\Files_Sharing\SharedStorage';
-		}
-		return is_a($this, $class);
-	}
-
-	/**
-	 * A custom storage implementation can return an url for direct download of a give file.
-	 *
-	 * For now the returned array can hold the parameter url - in future more attributes might follow.
-	 *
-	 * @param string $path
-	 * @return array|false
-	 */
-	public function getDirectDownload($path) {
-		return [];
-	}
-
-	/**
-	 * @inheritdoc
-	 * @throws InvalidPathException
-	 */
-	public function verifyPath($path, $fileName) {
-
-		// verify empty and dot files
-		$trimmed = trim($fileName);
-		if ($trimmed === '') {
-			throw new EmptyFileNameException();
-		}
-
-		if (\OC\Files\Filesystem::isIgnoredDir($trimmed)) {
-			throw new InvalidDirectoryException();
-		}
-
-		if (!\OC::$server->getDatabaseConnection()->supports4ByteText()) {
-			// verify database - e.g. mysql only 3-byte chars
-			if (preg_match('%(?:
+    use LocalTempFileTrait;
+
+    protected $cache;
+    protected $scanner;
+    protected $watcher;
+    protected $propagator;
+    protected $storageCache;
+    protected $updater;
+
+    protected $mountOptions = [];
+    protected $owner = null;
+
+    private $shouldLogLocks = null;
+    private $logger;
+
+    public function __construct($parameters) {
+    }
+
+    /**
+     * Remove a file or folder
+     *
+     * @param string $path
+     * @return bool
+     */
+    protected function remove($path) {
+        if ($this->is_dir($path)) {
+            return $this->rmdir($path);
+        } else if ($this->is_file($path)) {
+            return $this->unlink($path);
+        } else {
+            return false;
+        }
+    }
+
+    public function is_dir($path) {
+        return $this->filetype($path) === 'dir';
+    }
+
+    public function is_file($path) {
+        return $this->filetype($path) === 'file';
+    }
+
+    public function filesize($path) {
+        if ($this->is_dir($path)) {
+            return 0; //by definition
+        } else {
+            $stat = $this->stat($path);
+            if (isset($stat['size'])) {
+                return $stat['size'];
+            } else {
+                return 0;
+            }
+        }
+    }
+
+    public function isReadable($path) {
+        // at least check whether it exists
+        // subclasses might want to implement this more thoroughly
+        return $this->file_exists($path);
+    }
+
+    public function isUpdatable($path) {
+        // at least check whether it exists
+        // subclasses might want to implement this more thoroughly
+        // a non-existing file/folder isn't updatable
+        return $this->file_exists($path);
+    }
+
+    public function isCreatable($path) {
+        if ($this->is_dir($path) && $this->isUpdatable($path)) {
+            return true;
+        }
+        return false;
+    }
+
+    public function isDeletable($path) {
+        if ($path === '' || $path === '/') {
+            return false;
+        }
+        $parent = dirname($path);
+        return $this->isUpdatable($parent) && $this->isUpdatable($path);
+    }
+
+    public function isSharable($path) {
+        return $this->isReadable($path);
+    }
+
+    public function getPermissions($path) {
+        $permissions = 0;
+        if ($this->isCreatable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_CREATE;
+        }
+        if ($this->isReadable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_READ;
+        }
+        if ($this->isUpdatable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_UPDATE;
+        }
+        if ($this->isDeletable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_DELETE;
+        }
+        if ($this->isSharable($path)) {
+            $permissions |= \OCP\Constants::PERMISSION_SHARE;
+        }
+        return $permissions;
+    }
+
+    public function filemtime($path) {
+        $stat = $this->stat($path);
+        if (isset($stat['mtime']) && $stat['mtime'] > 0) {
+            return $stat['mtime'];
+        } else {
+            return 0;
+        }
+    }
+
+    public function file_get_contents($path) {
+        $handle = $this->fopen($path, "r");
+        if (!$handle) {
+            return false;
+        }
+        $data = stream_get_contents($handle);
+        fclose($handle);
+        return $data;
+    }
+
+    public function file_put_contents($path, $data) {
+        $handle = $this->fopen($path, "w");
+        $this->removeCachedFile($path);
+        $count = fwrite($handle, $data);
+        fclose($handle);
+        return $count;
+    }
+
+    public function rename($path1, $path2) {
+        $this->remove($path2);
+
+        $this->removeCachedFile($path1);
+        return $this->copy($path1, $path2) and $this->remove($path1);
+    }
+
+    public function copy($path1, $path2) {
+        if ($this->is_dir($path1)) {
+            $this->remove($path2);
+            $dir = $this->opendir($path1);
+            $this->mkdir($path2);
+            while ($file = readdir($dir)) {
+                if (!Filesystem::isIgnoredDir($file)) {
+                    if (!$this->copy($path1 . '/' . $file, $path2 . '/' . $file)) {
+                        return false;
+                    }
+                }
+            }
+            closedir($dir);
+            return true;
+        } else {
+            $source = $this->fopen($path1, 'r');
+            $target = $this->fopen($path2, 'w');
+            list(, $result) = \OC_Helper::streamCopy($source, $target);
+            if (!$result) {
+                \OC::$server->getLogger()->warning("Failed to write data while copying $path1 to $path2");
+            }
+            $this->removeCachedFile($path2);
+            return $result;
+        }
+    }
+
+    public function getMimeType($path) {
+        if ($this->is_dir($path)) {
+            return 'httpd/unix-directory';
+        } elseif ($this->file_exists($path)) {
+            return \OC::$server->getMimeTypeDetector()->detectPath($path);
+        } else {
+            return false;
+        }
+    }
+
+    public function hash($type, $path, $raw = false) {
+        $fh = $this->fopen($path, 'rb');
+        $ctx = hash_init($type);
+        hash_update_stream($ctx, $fh);
+        fclose($fh);
+        return hash_final($ctx, $raw);
+    }
+
+    public function search($query) {
+        return $this->searchInDir($query);
+    }
+
+    public function getLocalFile($path) {
+        return $this->getCachedFile($path);
+    }
+
+    /**
+     * @param string $path
+     * @param string $target
+     */
+    private function addLocalFolder($path, $target) {
+        $dh = $this->opendir($path);
+        if (is_resource($dh)) {
+            while (($file = readdir($dh)) !== false) {
+                if (!\OC\Files\Filesystem::isIgnoredDir($file)) {
+                    if ($this->is_dir($path . '/' . $file)) {
+                        mkdir($target . '/' . $file);
+                        $this->addLocalFolder($path . '/' . $file, $target . '/' . $file);
+                    } else {
+                        $tmp = $this->toTmpFile($path . '/' . $file);
+                        rename($tmp, $target . '/' . $file);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * @param string $query
+     * @param string $dir
+     * @return array
+     */
+    protected function searchInDir($query, $dir = '') {
+        $files = array();
+        $dh = $this->opendir($dir);
+        if (is_resource($dh)) {
+            while (($item = readdir($dh)) !== false) {
+                if (\OC\Files\Filesystem::isIgnoredDir($item)) continue;
+                if (strstr(strtolower($item), strtolower($query)) !== false) {
+                    $files[] = $dir . '/' . $item;
+                }
+                if ($this->is_dir($dir . '/' . $item)) {
+                    $files = array_merge($files, $this->searchInDir($query, $dir . '/' . $item));
+                }
+            }
+        }
+        closedir($dh);
+        return $files;
+    }
+
+    /**
+     * check if a file or folder has been updated since $time
+     *
+     * The method is only used to check if the cache needs to be updated. Storage backends that don't support checking
+     * the mtime should always return false here. As a result storage implementations that always return false expect
+     * exclusive access to the backend and will not pick up files that have been added in a way that circumvents
+     * ownClouds filesystem.
+     *
+     * @param string $path
+     * @param int $time
+     * @return bool
+     */
+    public function hasUpdated($path, $time) {
+        return $this->filemtime($path) > $time;
+    }
+
+    public function getCache($path = '', $storage = null) {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($storage->cache)) {
+            $storage->cache = new Cache($storage);
+        }
+        return $storage->cache;
+    }
+
+    public function getScanner($path = '', $storage = null) {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($storage->scanner)) {
+            $storage->scanner = new Scanner($storage);
+        }
+        return $storage->scanner;
+    }
+
+    public function getWatcher($path = '', $storage = null) {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($this->watcher)) {
+            $this->watcher = new Watcher($storage);
+            $globalPolicy = \OC::$server->getConfig()->getSystemValue('filesystem_check_changes', Watcher::CHECK_NEVER);
+            $this->watcher->setPolicy((int)$this->getMountOption('filesystem_check_changes', $globalPolicy));
+        }
+        return $this->watcher;
+    }
+
+    /**
+     * get a propagator instance for the cache
+     *
+     * @param \OC\Files\Storage\Storage (optional) the storage to pass to the watcher
+     * @return \OC\Files\Cache\Propagator
+     */
+    public function getPropagator($storage = null) {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($storage->propagator)) {
+            $storage->propagator = new Propagator($storage, \OC::$server->getDatabaseConnection());
+        }
+        return $storage->propagator;
+    }
+
+    public function getUpdater($storage = null) {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($storage->updater)) {
+            $storage->updater = new Updater($storage);
+        }
+        return $storage->updater;
+    }
+
+    public function getStorageCache($storage = null) {
+        if (!$storage) {
+            $storage = $this;
+        }
+        if (!isset($this->storageCache)) {
+            $this->storageCache = new \OC\Files\Cache\Storage($storage);
+        }
+        return $this->storageCache;
+    }
+
+    /**
+     * get the owner of a path
+     *
+     * @param string $path The path to get the owner
+     * @return string|false uid or false
+     */
+    public function getOwner($path) {
+        if ($this->owner === null) {
+            $this->owner = \OC_User::getUser();
+        }
+
+        return $this->owner;
+    }
+
+    /**
+     * get the ETag for a file or folder
+     *
+     * @param string $path
+     * @return string
+     */
+    public function getETag($path) {
+        return uniqid();
+    }
+
+    /**
+     * clean a path, i.e. remove all redundant '.' and '..'
+     * making sure that it can't point to higher than '/'
+     *
+     * @param string $path The path to clean
+     * @return string cleaned path
+     */
+    public function cleanPath($path) {
+        if (strlen($path) == 0 or $path[0] != '/') {
+            $path = '/' . $path;
+        }
+
+        $output = array();
+        foreach (explode('/', $path) as $chunk) {
+            if ($chunk == '..') {
+                array_pop($output);
+            } else if ($chunk == '.') {
+            } else {
+                $output[] = $chunk;
+            }
+        }
+        return implode('/', $output);
+    }
+
+    /**
+     * Test a storage for availability
+     *
+     * @return bool
+     */
+    public function test() {
+        try {
+            if ($this->stat('')) {
+                return true;
+            }
+            return false;
+        } catch (\Exception $e) {
+            return false;
+        }
+    }
+
+    /**
+     * get the free space in the storage
+     *
+     * @param string $path
+     * @return int|false
+     */
+    public function free_space($path) {
+        return \OCP\Files\FileInfo::SPACE_UNKNOWN;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isLocal() {
+        // the common implementation returns a temporary file by
+        // default, which is not local
+        return false;
+    }
+
+    /**
+     * Check if the storage is an instance of $class or is a wrapper for a storage that is an instance of $class
+     *
+     * @param string $class
+     * @return bool
+     */
+    public function instanceOfStorage($class) {
+        if (ltrim($class, '\\') === 'OC\Files\Storage\Shared') {
+            // FIXME Temporary fix to keep existing checks working
+            $class = '\OCA\Files_Sharing\SharedStorage';
+        }
+        return is_a($this, $class);
+    }
+
+    /**
+     * A custom storage implementation can return an url for direct download of a give file.
+     *
+     * For now the returned array can hold the parameter url - in future more attributes might follow.
+     *
+     * @param string $path
+     * @return array|false
+     */
+    public function getDirectDownload($path) {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     * @throws InvalidPathException
+     */
+    public function verifyPath($path, $fileName) {
+
+        // verify empty and dot files
+        $trimmed = trim($fileName);
+        if ($trimmed === '') {
+            throw new EmptyFileNameException();
+        }
+
+        if (\OC\Files\Filesystem::isIgnoredDir($trimmed)) {
+            throw new InvalidDirectoryException();
+        }
+
+        if (!\OC::$server->getDatabaseConnection()->supports4ByteText()) {
+            // verify database - e.g. mysql only 3-byte chars
+            if (preg_match('%(?:
       \xF0[\x90-\xBF][\x80-\xBF]{2}      # planes 1-3
     | [\xF1-\xF3][\x80-\xBF]{3}          # planes 4-15
     | \xF4[\x80-\x8F][\x80-\xBF]{2}      # plane 16
 )%xs', $fileName)) {
-				throw new InvalidCharacterInPathException();
-			}
-		}
-
-		if (isset($fileName[255])) {
-			throw new FileNameTooLongException();
-		}
-
-		// NOTE: $path will remain unverified for now
-		$this->verifyPosixPath($fileName);
-	}
-
-	/**
-	 * @param string $fileName
-	 * @throws InvalidPathException
-	 */
-	protected function verifyPosixPath($fileName) {
-		$fileName = trim($fileName);
-		$this->scanForInvalidCharacters($fileName, "\\/");
-		$reservedNames = ['*'];
-		if (in_array($fileName, $reservedNames)) {
-			throw new ReservedWordException();
-		}
-	}
-
-	/**
-	 * @param string $fileName
-	 * @param string $invalidChars
-	 * @throws InvalidPathException
-	 */
-	private function scanForInvalidCharacters($fileName, $invalidChars) {
-		foreach (str_split($invalidChars) as $char) {
-			if (strpos($fileName, $char) !== false) {
-				throw new InvalidCharacterInPathException();
-			}
-		}
-
-		$sanitizedFileName = filter_var($fileName, FILTER_UNSAFE_RAW, FILTER_FLAG_STRIP_LOW);
-		if ($sanitizedFileName !== $fileName) {
-			throw new InvalidCharacterInPathException();
-		}
-	}
-
-	/**
-	 * @param array $options
-	 */
-	public function setMountOptions(array $options) {
-		$this->mountOptions = $options;
-	}
-
-	/**
-	 * @param string $name
-	 * @param mixed $default
-	 * @return mixed
-	 */
-	public function getMountOption($name, $default = null) {
-		return isset($this->mountOptions[$name]) ? $this->mountOptions[$name] : $default;
-	}
-
-	/**
-	 * @param IStorage $sourceStorage
-	 * @param string $sourceInternalPath
-	 * @param string $targetInternalPath
-	 * @param bool $preserveMtime
-	 * @return bool
-	 */
-	public function copyFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime = false) {
-		if ($sourceStorage === $this) {
-			return $this->copy($sourceInternalPath, $targetInternalPath);
-		}
-
-		if ($sourceStorage->is_dir($sourceInternalPath)) {
-			$dh = $sourceStorage->opendir($sourceInternalPath);
-			$result = $this->mkdir($targetInternalPath);
-			if (is_resource($dh)) {
-				while ($result and ($file = readdir($dh)) !== false) {
-					if (!Filesystem::isIgnoredDir($file)) {
-						$result &= $this->copyFromStorage($sourceStorage, $sourceInternalPath . '/' . $file, $targetInternalPath . '/' . $file);
-					}
-				}
-			}
-		} else {
-			$source = $sourceStorage->fopen($sourceInternalPath, 'r');
-			// TODO: call fopen in a way that we execute again all storage wrappers
-			// to avoid that we bypass storage wrappers which perform important actions
-			// for this operation. Same is true for all other operations which
-			// are not the same as the original one.Once this is fixed we also
-			// need to adjust the encryption wrapper.
-			$target = $this->fopen($targetInternalPath, 'w');
-			list(, $result) = \OC_Helper::streamCopy($source, $target);
-			if ($result and $preserveMtime) {
-				$this->touch($targetInternalPath, $sourceStorage->filemtime($sourceInternalPath));
-			}
-			fclose($source);
-			fclose($target);
-
-			if (!$result) {
-				// delete partially written target file
-				$this->unlink($targetInternalPath);
-				// delete cache entry that was created by fopen
-				$this->getCache()->remove($targetInternalPath);
-			}
-		}
-		return (bool)$result;
-	}
-
-	/**
-	 * @param IStorage $sourceStorage
-	 * @param string $sourceInternalPath
-	 * @param string $targetInternalPath
-	 * @return bool
-	 */
-	public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) {
-		if ($sourceStorage === $this) {
-			return $this->rename($sourceInternalPath, $targetInternalPath);
-		}
-
-		if (!$sourceStorage->isDeletable($sourceInternalPath)) {
-			return false;
-		}
-
-		$result = $this->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, true);
-		if ($result) {
-			if ($sourceStorage->is_dir($sourceInternalPath)) {
-				$result &= $sourceStorage->rmdir($sourceInternalPath);
-			} else {
-				$result &= $sourceStorage->unlink($sourceInternalPath);
-			}
-		}
-		return $result;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function getMetaData($path) {
-		$permissions = $this->getPermissions($path);
-		if (!$permissions & \OCP\Constants::PERMISSION_READ) {
-			//can't read, nothing we can do
-			return null;
-		}
-
-		$data = [];
-		$data['mimetype'] = $this->getMimeType($path);
-		$data['mtime'] = $this->filemtime($path);
-		if ($data['mtime'] === false) {
-			$data['mtime'] = time();
-		}
-		if ($data['mimetype'] == 'httpd/unix-directory') {
-			$data['size'] = -1; //unknown
-		} else {
-			$data['size'] = $this->filesize($path);
-		}
-		$data['etag'] = $this->getETag($path);
-		$data['storage_mtime'] = $data['mtime'];
-		$data['permissions'] = $permissions;
-
-		return $data;
-	}
-
-	/**
-	 * @param string $path
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param \OCP\Lock\ILockingProvider $provider
-	 * @throws \OCP\Lock\LockedException
-	 */
-	public function acquireLock($path, $type, ILockingProvider $provider) {
-		$logger = $this->getLockLogger();
-		if ($logger) {
-			$typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
-			$logger->info(
-				sprintf(
-					'acquire %s lock on "%s" on storage "%s"',
-					$typeString,
-					$path,
-					$this->getId()
-				),
-				[
-					'app' => 'locking',
-				]
-			);
-		}
-		try {
-			$provider->acquireLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
-		} catch (LockedException $e) {
-			if ($logger) {
-				$logger->logException($e);
-			}
-			throw $e;
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param \OCP\Lock\ILockingProvider $provider
-	 * @throws \OCP\Lock\LockedException
-	 */
-	public function releaseLock($path, $type, ILockingProvider $provider) {
-		$logger = $this->getLockLogger();
-		if ($logger) {
-			$typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
-			$logger->info(
-				sprintf(
-					'release %s lock on "%s" on storage "%s"',
-					$typeString,
-					$path,
-					$this->getId()
-				),
-				[
-					'app' => 'locking',
-				]
-			);
-		}
-		try {
-			$provider->releaseLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
-		} catch (LockedException $e) {
-			if ($logger) {
-				$logger->logException($e);
-			}
-			throw $e;
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
-	 * @param \OCP\Lock\ILockingProvider $provider
-	 * @throws \OCP\Lock\LockedException
-	 */
-	public function changeLock($path, $type, ILockingProvider $provider) {
-		$logger = $this->getLockLogger();
-		if ($logger) {
-			$typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
-			$logger->info(
-				sprintf(
-					'change lock on "%s" to %s on storage "%s"',
-					$path,
-					$typeString,
-					$this->getId()
-				),
-				[
-					'app' => 'locking',
-				]
-			);
-		}
-		try {
-			$provider->changeLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
-		} catch (LockedException $e) {
-			if ($logger) {
-				$logger->logException($e);
-			}
-			throw $e;
-		}
-	}
-
-	private function getLockLogger() {
-		if (is_null($this->shouldLogLocks)) {
-			$this->shouldLogLocks = \OC::$server->getConfig()->getSystemValue('filelocking.debug', false);
-			$this->logger = $this->shouldLogLocks ? \OC::$server->getLogger() : null;
-		}
-		return $this->logger;
-	}
-
-	/**
-	 * @return array [ available, last_checked ]
-	 */
-	public function getAvailability() {
-		return $this->getStorageCache()->getAvailability();
-	}
-
-	/**
-	 * @param bool $isAvailable
-	 */
-	public function setAvailability($isAvailable) {
-		$this->getStorageCache()->setAvailability($isAvailable);
-	}
-
-	/**
-	 * @return bool
-	 */
-	public function needsPartFile() {
-		return true;
-	}
+                throw new InvalidCharacterInPathException();
+            }
+        }
+
+        if (isset($fileName[255])) {
+            throw new FileNameTooLongException();
+        }
+
+        // NOTE: $path will remain unverified for now
+        $this->verifyPosixPath($fileName);
+    }
+
+    /**
+     * @param string $fileName
+     * @throws InvalidPathException
+     */
+    protected function verifyPosixPath($fileName) {
+        $fileName = trim($fileName);
+        $this->scanForInvalidCharacters($fileName, "\\/");
+        $reservedNames = ['*'];
+        if (in_array($fileName, $reservedNames)) {
+            throw new ReservedWordException();
+        }
+    }
+
+    /**
+     * @param string $fileName
+     * @param string $invalidChars
+     * @throws InvalidPathException
+     */
+    private function scanForInvalidCharacters($fileName, $invalidChars) {
+        foreach (str_split($invalidChars) as $char) {
+            if (strpos($fileName, $char) !== false) {
+                throw new InvalidCharacterInPathException();
+            }
+        }
+
+        $sanitizedFileName = filter_var($fileName, FILTER_UNSAFE_RAW, FILTER_FLAG_STRIP_LOW);
+        if ($sanitizedFileName !== $fileName) {
+            throw new InvalidCharacterInPathException();
+        }
+    }
+
+    /**
+     * @param array $options
+     */
+    public function setMountOptions(array $options) {
+        $this->mountOptions = $options;
+    }
+
+    /**
+     * @param string $name
+     * @param mixed $default
+     * @return mixed
+     */
+    public function getMountOption($name, $default = null) {
+        return isset($this->mountOptions[$name]) ? $this->mountOptions[$name] : $default;
+    }
+
+    /**
+     * @param IStorage $sourceStorage
+     * @param string $sourceInternalPath
+     * @param string $targetInternalPath
+     * @param bool $preserveMtime
+     * @return bool
+     */
+    public function copyFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath, $preserveMtime = false) {
+        if ($sourceStorage === $this) {
+            return $this->copy($sourceInternalPath, $targetInternalPath);
+        }
+
+        if ($sourceStorage->is_dir($sourceInternalPath)) {
+            $dh = $sourceStorage->opendir($sourceInternalPath);
+            $result = $this->mkdir($targetInternalPath);
+            if (is_resource($dh)) {
+                while ($result and ($file = readdir($dh)) !== false) {
+                    if (!Filesystem::isIgnoredDir($file)) {
+                        $result &= $this->copyFromStorage($sourceStorage, $sourceInternalPath . '/' . $file, $targetInternalPath . '/' . $file);
+                    }
+                }
+            }
+        } else {
+            $source = $sourceStorage->fopen($sourceInternalPath, 'r');
+            // TODO: call fopen in a way that we execute again all storage wrappers
+            // to avoid that we bypass storage wrappers which perform important actions
+            // for this operation. Same is true for all other operations which
+            // are not the same as the original one.Once this is fixed we also
+            // need to adjust the encryption wrapper.
+            $target = $this->fopen($targetInternalPath, 'w');
+            list(, $result) = \OC_Helper::streamCopy($source, $target);
+            if ($result and $preserveMtime) {
+                $this->touch($targetInternalPath, $sourceStorage->filemtime($sourceInternalPath));
+            }
+            fclose($source);
+            fclose($target);
+
+            if (!$result) {
+                // delete partially written target file
+                $this->unlink($targetInternalPath);
+                // delete cache entry that was created by fopen
+                $this->getCache()->remove($targetInternalPath);
+            }
+        }
+        return (bool)$result;
+    }
+
+    /**
+     * @param IStorage $sourceStorage
+     * @param string $sourceInternalPath
+     * @param string $targetInternalPath
+     * @return bool
+     */
+    public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) {
+        if ($sourceStorage === $this) {
+            return $this->rename($sourceInternalPath, $targetInternalPath);
+        }
+
+        if (!$sourceStorage->isDeletable($sourceInternalPath)) {
+            return false;
+        }
+
+        $result = $this->copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath, true);
+        if ($result) {
+            if ($sourceStorage->is_dir($sourceInternalPath)) {
+                $result &= $sourceStorage->rmdir($sourceInternalPath);
+            } else {
+                $result &= $sourceStorage->unlink($sourceInternalPath);
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getMetaData($path) {
+        $permissions = $this->getPermissions($path);
+        if (!$permissions & \OCP\Constants::PERMISSION_READ) {
+            //can't read, nothing we can do
+            return null;
+        }
+
+        $data = [];
+        $data['mimetype'] = $this->getMimeType($path);
+        $data['mtime'] = $this->filemtime($path);
+        if ($data['mtime'] === false) {
+            $data['mtime'] = time();
+        }
+        if ($data['mimetype'] == 'httpd/unix-directory') {
+            $data['size'] = -1; //unknown
+        } else {
+            $data['size'] = $this->filesize($path);
+        }
+        $data['etag'] = $this->getETag($path);
+        $data['storage_mtime'] = $data['mtime'];
+        $data['permissions'] = $permissions;
+
+        return $data;
+    }
+
+    /**
+     * @param string $path
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param \OCP\Lock\ILockingProvider $provider
+     * @throws \OCP\Lock\LockedException
+     */
+    public function acquireLock($path, $type, ILockingProvider $provider) {
+        $logger = $this->getLockLogger();
+        if ($logger) {
+            $typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
+            $logger->info(
+                sprintf(
+                    'acquire %s lock on "%s" on storage "%s"',
+                    $typeString,
+                    $path,
+                    $this->getId()
+                ),
+                [
+                    'app' => 'locking',
+                ]
+            );
+        }
+        try {
+            $provider->acquireLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
+        } catch (LockedException $e) {
+            if ($logger) {
+                $logger->logException($e);
+            }
+            throw $e;
+        }
+    }
+
+    /**
+     * @param string $path
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param \OCP\Lock\ILockingProvider $provider
+     * @throws \OCP\Lock\LockedException
+     */
+    public function releaseLock($path, $type, ILockingProvider $provider) {
+        $logger = $this->getLockLogger();
+        if ($logger) {
+            $typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
+            $logger->info(
+                sprintf(
+                    'release %s lock on "%s" on storage "%s"',
+                    $typeString,
+                    $path,
+                    $this->getId()
+                ),
+                [
+                    'app' => 'locking',
+                ]
+            );
+        }
+        try {
+            $provider->releaseLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
+        } catch (LockedException $e) {
+            if ($logger) {
+                $logger->logException($e);
+            }
+            throw $e;
+        }
+    }
+
+    /**
+     * @param string $path
+     * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+     * @param \OCP\Lock\ILockingProvider $provider
+     * @throws \OCP\Lock\LockedException
+     */
+    public function changeLock($path, $type, ILockingProvider $provider) {
+        $logger = $this->getLockLogger();
+        if ($logger) {
+            $typeString = ($type === ILockingProvider::LOCK_SHARED) ? 'shared' : 'exclusive';
+            $logger->info(
+                sprintf(
+                    'change lock on "%s" to %s on storage "%s"',
+                    $path,
+                    $typeString,
+                    $this->getId()
+                ),
+                [
+                    'app' => 'locking',
+                ]
+            );
+        }
+        try {
+            $provider->changeLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
+        } catch (LockedException $e) {
+            if ($logger) {
+                $logger->logException($e);
+            }
+            throw $e;
+        }
+    }
+
+    private function getLockLogger() {
+        if (is_null($this->shouldLogLocks)) {
+            $this->shouldLogLocks = \OC::$server->getConfig()->getSystemValue('filelocking.debug', false);
+            $this->logger = $this->shouldLogLocks ? \OC::$server->getLogger() : null;
+        }
+        return $this->logger;
+    }
+
+    /**
+     * @return array [ available, last_checked ]
+     */
+    public function getAvailability() {
+        return $this->getStorageCache()->getAvailability();
+    }
+
+    /**
+     * @param bool $isAvailable
+     */
+    public function setAvailability($isAvailable) {
+        $this->getStorageCache()->setAvailability($isAvailable);
+    }
+
+    /**
+     * @return bool
+     */
+    public function needsPartFile() {
+        return true;
+    }
 }