SMB - Code Metrics - Inspection of "[8.2] handle forbidden exceptions in smb backend" - owncloud/core - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — stable8.2 (#23481)

by Robin

created 2016-03-22 14:39 UTC

SMB C

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	289
Duplicated Lines	11.42 %

Coupling/Cohesion

Components	1
Dependencies	5

Importance

Changes	3
Bugs	0	Features	0

Metric	Value
wmc	69
c	3
b	0
f	0
lcom	1
cbo	5
dl	33
loc	289
rs	5.6445

17 Methods

Rating	Name	Duplication	Size	Complexity
A	getId()	0	6	1
A	buildPath()	0	3	1
A	getFileInfo()	0	7	2
A	getFolderContents()	0	8	2
A	formatInfo()	0	6	1
A	stat()	0	3	1
A	unlink()	0	16	4
A	hasUpdated()	0	10	3
C	__construct()	3	21	10
D	fopen()	11	54	22
B	rmdir()	0	19	5
A	touch()	0	8	2
A	opendir()	0	14	3
A	filetype()	9	9	4
A	mkdir()	0	9	2
A	file_exists()	10	10	3
A	checkDependencies()	0	6	3

How to fix Duplicated Code Complexity

Duplicated Code

Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.

Common duplication problems, and corresponding solutions are:

If you have the same expression in different places: Extract expression to a method
If you have the same method in different sub-classes: Extract method, and pull up field to the parent class
If you have the same code in unrelated classes: Consider extracting the code to a new class, and injecting that class

Complex Class

Tip: Before tackling complexity, make sure that you eliminate any duplication first. This often can reduce the size of classes significantly.

Complex classes like SMB often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

While breaking up the class, it is a good idea to analyze how other classes use SMB, and based on these observations, apply Extract Interface, too.

<?php
/**
 * @author Arthur Schiwon <[email protected]>
 * @author Jörn Friedrich Dreyer <[email protected]>
 * @author Michael Gapczynski <[email protected]>
 * @author Morris Jobke <[email protected]>
 * @author Philipp Kapfer <[email protected]>
 * @author Robin Appelman <[email protected]>
 * @author Robin McCorkell <[email protected]>
 * @author Thomas Müller <[email protected]>
 * @author Vincent Petry <[email protected]>
 *
 * @copyright Copyright (c) 2015, ownCloud, Inc.
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OC\Files\Storage;

use Icewind\SMB\Exception\Exception;
use Icewind\SMB\Exception\ForbiddenException;
use Icewind\SMB\Exception\NotFoundException;
use Icewind\SMB\NativeServer;
use Icewind\SMB\Server;
use Icewind\Streams\CallbackWrapper;
use Icewind\Streams\IteratorDirectory;
use OC\Cache\CappedMemoryCache;
use OC\Files\Filesystem;

class SMB extends Common {
	/**
	 * @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();

	}

	/**
	 * @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);
	}

	/**
	 * @param string $path
	 * @return \Icewind\SMB\IFileInfo
	 */
	protected function getFileInfo($path) {
		$path = $this->buildPath($path);
		if (!isset($this->statCache[$path])) {
			$this->statCache[$path] = $this->share->stat($path);
		}
		return $this->statCache[$path];
	}

	/**
	 * @param string $path
	 * @return \Icewind\SMB\IFileInfo[]
	 */
	protected function getFolderContents($path) {
		$path = $this->buildPath($path);
		$files = $this->share->dir($path);
		foreach ($files as $file) {
			$this->statCache[$path . '/' . $file->getName()] = $file;
		}
		return $files;
	}

	/**
	 * @param \Icewind\SMB\IFileInfo $info
	 * @return array
	 */
	protected function formatInfo($info) {
		return array(
			'size' => $info->getSize(),
			'mtime' => $info->getMTime()
		);
	}

	/**
	 * @param string $path
	 * @return array
	 */
	public function stat($path) {
		return $this->formatInfo($this->getFileInfo($path));
	}

	/**
	 * @param string $path
	 * @return bool
	 */
	public function unlink($path) {
		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;
		}
	}

	/**
	 * 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 $mode
	 * @return resource
	 */
	public function fopen($path, $mode) {
		$fullPath = $this->buildPath($path);
		try {
			switch ($mode) {
				case 'r':
				case 'rb':
					if (!$this->file_exists($path)) {
						return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
					}
					return $this->share->read($fullPath);
				case 'w':
				case 'wb':
					return $this->share->write($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;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
						}
						$tmpFile = $this->getCachedFile($path);
					} else {
						if (!$this->isCreatable(dirname($path))) {
							return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
						}
						$tmpFile = \OCP\Files::tmpFile($ext);
					}
					$source = fopen($tmpFile, $mode);
					$share = $this->share;
					return CallBackWrapper::wrap($source, null, null, function () use ($tmpFile, $fullPath, $share) {
						$share->put($tmpFile, $fullPath);
						unlink($tmpFile);
					});
			}
			return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
		} catch (NotFoundException $e) {

			return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
		} catch (ForbiddenException $e) {

			return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
		}
	}

	public function rmdir($path) {
		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;
		}
	}

	public function touch($path, $time = null) {
		if (!$this->file_exists($path)) {
			$fh = $this->share->write($this->buildPath($path));
			fclose($fh);
			return true;
		}
		return false;
	}

	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 (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;
		}
	}

	/**
	 * check if smbclient is installed
	 */
	public static function checkDependencies() {
		return (
			(bool)\OC_Helper::findBinaryPath('smbclient')
			|| Server::NativeAvailable()
		) ? true : ['smbclient'];
	}
}


1			<?php
2			/**
3			* @author Arthur Schiwon <[email protected]>
4			* @author Jörn Friedrich Dreyer <[email protected]>
5			* @author Michael Gapczynski <[email protected]>
6			* @author Morris Jobke <[email protected]>
7			* @author Philipp Kapfer <[email protected]>
8			* @author Robin Appelman <[email protected]>
9			* @author Robin McCorkell <[email protected]>
10			* @author Thomas Müller <[email protected]>
11			* @author Vincent Petry <[email protected]>
12			*
13			* @copyright Copyright (c) 2015, ownCloud, Inc.
14			* @license AGPL-3.0
15			*
16			* This code is free software: you can redistribute it and/or modify
17			* it under the terms of the GNU Affero General Public License, version 3,
18			* as published by the Free Software Foundation.
19			*
20			* This program is distributed in the hope that it will be useful,
21			* but WITHOUT ANY WARRANTY; without even the implied warranty of
22			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23			* GNU Affero General Public License for more details.
24			*
25			* You should have received a copy of the GNU Affero General Public License, version 3,
26			* along with this program. If not, see <http://www.gnu.org/licenses/>
27			*
28			*/
29
30			namespace OC\Files\Storage;
31
32			use Icewind\SMB\Exception\Exception;
33			use Icewind\SMB\Exception\ForbiddenException;
34			use Icewind\SMB\Exception\NotFoundException;
35			use Icewind\SMB\NativeServer;
36			use Icewind\SMB\Server;
37			use Icewind\Streams\CallbackWrapper;
38			use Icewind\Streams\IteratorDirectory;
39			use OC\Cache\CappedMemoryCache;
40			use OC\Files\Filesystem;

owncloud / core