FileCache - Code Metrics - Inspection of "Fixed broken link" - kodus/file-cache - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( b82dbc...a94e20 )

unknown

created 2017-10-11 08:43 UTC

FileCache C

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	335
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

92.03%

Importance

Changes

Metric	Value
wmc	55
lcom	1
cbo	1
dl	0
loc	335
ccs	127
cts	138
cp	0.9203
rs	6.8
c	0
b	0
f	0

17 Methods

Rating	Name	Size	Complexity
B	__construct()	22	5
B	get()	34	6
A	delete()	4	1
A	clear()	14	3
B	getMultiple()	14	5
B	setMultiple()	15	5
A	deleteMultiple()	11	4
A	has()	4	1
B	increment()	24	3
A	decrement()	4	1
A	cleanExpired()	12	3
A	getPath()	14	1
A	getTime()	4	1
A	listPaths()	17	3
A	validateKey()	6	2
A	mkdir()	11	2
D	set()	39	9

How to fix Complexity

<?php

namespace Kodus\Cache;

use DateInterval;
use FilesystemIterator;
use Generator;
use Psr\SimpleCache\CacheInterface;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use Traversable;

/**
 * This is a simple, file-based cache implementation, which is bootstrapped by
 * the Core Provider as a default.
 *
 * Bootstrapping a more powerful cache for production scenarios is highly recommended.
 *
 * @link https://github.com/matthiasmullie/scrapbook/
 */
class FileCache implements CacheInterface
{
    /**
     * @var string control characters for keys, reserved by PSR-16
     */
    const PSR16_RESERVED = '/\{|\}|\(|\)|\/|\\\\|\@|\:/u';

    /**
     * @var string
     */
    private $cache_path;

    /**
     * @var int
     */
    private $default_ttl;

    /**
     * @var int
     */
    private $dir_mode;

    /**
     * @var int
     */
    private $file_mode;

    /**
     * @param string $cache_path  absolute root path of cache-file folder
     * @param int    $default_ttl default time-to-live (in seconds)
     * @param int    $dir_mode    permission mode for created dirs
     * @param int    $file_mode   permission mode for created files
     */
    public function __construct($cache_path, $default_ttl, $dir_mode = 0775, $file_mode = 0664)
    {
        $this->default_ttl = $default_ttl;
        $this->dir_mode = $dir_mode;
        $this->file_mode = $file_mode;

        if (! file_exists($cache_path) && file_exists(dirname($cache_path))) {
            $this->mkdir($cache_path); // ensure that the parent path exists
        }

        $path = realpath($cache_path);

        if ($path === false) {
            throw new InvalidArgumentException("cache path does not exist: {$cache_path}");
        }

        if (! is_writable($path . DIRECTORY_SEPARATOR)) {
            throw new InvalidArgumentException("cache path is not writable: {$cache_path}");
        }

        $this->cache_path = $path;
    }

    public function get($key, $default = null)
    {
        $path = $this->getPath($key);

        $expires_at = @filemtime($path);

        if ($expires_at === false) {
            return $default; // file not found
        }

        if ($this->getTime() >= $expires_at) {
            @unlink($path); // file expired
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}

            return $default;
        }

        $data = @file_get_contents($path);

        if ($data === false) {
            return $default; // race condition: file not found
        }

        if ($data === 'b:0;') {
            return false; // because we can't otherwise distinguish a FALSE return-value from unserialize()
        }

        $value = @unserialize($data);

        if ($value === false) {
            return $default; // unserialize() failed
        }

        return $value;
    }

    public function set($key, $value, $ttl = null)
    {
        $path = $this->getPath($key);

        $dir = dirname($path);

        if (! file_exists($dir)) {
            // ensure that the parent path exists:
            $this->mkdir($dir);
        }

        $temp_path = $this->cache_path . DIRECTORY_SEPARATOR . uniqid('', true);

        if (is_int($ttl)) {
            $expires_at = $this->getTime() + $ttl;
        } elseif ($ttl instanceof DateInterval) {
            $expires_at = date_create_from_format("U", $this->getTime())->add($ttl)->getTimestamp();
        } elseif ($ttl === null) {
            $expires_at = $this->getTime() + $this->default_ttl;
        } else {
            throw new InvalidArgumentException("invalid TTL: " . print_r($ttl, true));
        }

        if (false === @file_put_contents($temp_path, serialize($value))) {
            return false;
        }

        if (false === @chmod($temp_path, $this->file_mode)) {
            return false;
        }

        if (@touch($temp_path, $expires_at) && @rename($temp_path, $path)) {
            return true;
        }

        @unlink($temp_path);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}

        return false;
    }

    public function delete($key)
    {
        return @unlink($this->getPath($key));
    }

    public function clear()
    {
        $success = true;

        $paths = $this->listPaths();

        foreach ($paths as $path) {
            if (! unlink($path)) {
                $success = false;
            }
        }

        return $success;
    }

    public function getMultiple($keys, $default = null)
    {
        if (! is_array($keys) && ! $keys instanceof Traversable) {
            throw new InvalidArgumentException("keys must be either of type array or Traversable");
        }

        $values = [];

        foreach ($keys as $key) {
            $values[$key] = $this->get($key) ?: $default;
        }

        return $values;
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 setMultiple($values, $ttl = null)
    {
        if (! is_array($values) && ! $values instanceof Traversable) {
            throw new InvalidArgumentException("keys must be either of type array or Traversable");
        }

        $ok = true;

        foreach ($values as $key => $value) {
            $this->validateKey($key);
            $ok = $this->set($key, $value, $ttl) && $ok;
        }

        return $ok;
    }

    public function deleteMultiple($keys)
    {
        if (! is_array($keys) && ! $keys instanceof Traversable) {
            throw new InvalidArgumentException("keys must be either of type array or Traversable");
        }

        foreach ($keys as $key) {
            $this->validateKey($key);
            $this->delete($key);
        }
    }

    public function has($key)
    {
        return $this->get($key, $this) !== $this;
    }

    public function increment($key, $step = 1)
    {
        $path = $this->getPath($key);

        $dir = dirname($path);

        if (! file_exists($dir)) {
            $this->mkdir($dir); // ensure that the parent path exists
        }

        $lock_path = $dir . DIRECTORY_SEPARATOR . ".lock"; // allows max. 256 client locks at one time

        $lock_handle = fopen($lock_path, "w");

        flock($lock_handle, LOCK_EX);

        $value = $this->get($key, 0) + $step;

        $ok = $this->set($key, $value);

        flock($lock_handle, LOCK_UN);

        return $ok ? $value : false;
    }

    public function decrement($key, $step = 1)
    {
        return $this->increment($key, -$step);
    }

    /**
     * Clean up expired cache-files.
     *
     * This method is outside the scope of the PSR-16 cache concept, and is specific to
     * this implementation, being a file-cache.
     *
     * In scenarios with dynamic keys (such as Session IDs) you should call this method
     * periodically - for example from a scheduled daily cron-job.
     *
     * @return void
     */
    public function cleanExpired()
    {
        $now = $this->getTime();

        $paths = $this->listPaths();

        foreach ($paths as $path) {
            if ($now > filemtime($path)) {
                @unlink($path);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
            }
        }
    }

    /**
     * For a given cache key, obtain the absolute file path
     *
     * @param string $key
     *
     * @return string absolute path to cache-file
     *
     * @throws InvalidArgumentException if the specified key contains a character reserved by PSR-16
     */
    protected function getPath($key)
    {
        $this->validateKey($key);

        $hash = hash("sha256", $key);

        return $this->cache_path
            . DIRECTORY_SEPARATOR
            . strtoupper($hash[0])
            . DIRECTORY_SEPARATOR
            . strtoupper($hash[1])
            . DIRECTORY_SEPARATOR
            . substr($hash, 2);
    }

    /**
     * @return int current timestamp
     */
    protected function getTime()
    {
        return time();
    }

    /**
     * @return Generator|string[]
     */
    protected function listPaths()
    {
        $iterator = new RecursiveDirectoryIterator(
            $this->cache_path,
            FilesystemIterator::CURRENT_AS_PATHNAME | FilesystemIterator::SKIP_DOTS
        );

        $iterator = new RecursiveIteratorIterator($iterator);

        foreach ($iterator as $path) {
            if (is_dir($path)) {
                continue; // ignore directories
            }

            yield $path;
        }
    }

    /**
     * @param string $key
     *
     * @throws InvalidArgumentException
     */
    protected function validateKey($key)
    {
        if (preg_match(self::PSR16_RESERVED, $key, $match) === 1) {
            throw new InvalidArgumentException("invalid character in key: {$match[0]}");
        }
    }

    /**
     * Recursively create directories and apply permission mask
     *
     * @param string $path absolute directory path
     */
    private function mkdir($path)
    {
        $parent_path = dirname($path);

        if (!file_exists($parent_path)) {
            $this->mkdir($parent_path); // recursively create parent dirs first
        }

        mkdir($path);
        chmod($path, $this->dir_mode);
    }
}


1		<?php
2
3		namespace Kodus\Cache;
4
5		use DateInterval;
6		use FilesystemIterator;
7		use Generator;
8		use Psr\SimpleCache\CacheInterface;
9		use RecursiveDirectoryIterator;
10		use RecursiveIteratorIterator;
11		use Traversable;
12
13		/**
14		* This is a simple, file-based cache implementation, which is bootstrapped by
15		* the Core Provider as a default.
16		*
17		* Bootstrapping a more powerful cache for production scenarios is highly recommended.
18		*
19		* @link https://github.com/matthiasmullie/scrapbook/
20		*/
21		class FileCache implements CacheInterface
22		{
23		/**
24		* @var string control characters for keys, reserved by PSR-16
25		*/
26		const PSR16_RESERVED = '/\{\|\}\|\(\|\)\|\/\|\\\\\|\@\|\:/u';
27
28		/**
29		* @var string
30		*/
31		private $cache_path;
32
33		/**
34		* @var int
35		*/
36		private $default_ttl;
37
38		/**
39		* @var int
40		*/
41		private $dir_mode;
42
43		/**
44		* @var int
45		*/
46		private $file_mode;
47
48		/**
49		* @param string $cache_path absolute root path of cache-file folder
50		* @param int $default_ttl default time-to-live (in seconds)
51		* @param int $dir_mode permission mode for created dirs
52		* @param int $file_mode permission mode for created files
53		*/
54	14	public function __construct($cache_path, $default_ttl, $dir_mode = 0775, $file_mode = 0664)
55		{
56	14	$this->default_ttl = $default_ttl;
57	14	$this->dir_mode = $dir_mode;
58	14	$this->file_mode = $file_mode;
59
60	14	if (! file_exists($cache_path) && file_exists(dirname($cache_path))) {
61	14	$this->mkdir($cache_path); // ensure that the parent path exists
62		}
63
64	14	$path = realpath($cache_path);
65
66	14	if ($path === false) {
67		throw new InvalidArgumentException("cache path does not exist: {$cache_path}");
68		}
69
70	14	if (! is_writable($path . DIRECTORY_SEPARATOR)) {
71		throw new InvalidArgumentException("cache path is not writable: {$cache_path}");
72		}
73
74	14	$this->cache_path = $path;
75	14	}
76
77	12	public function get($key, $default = null)
78		{
79	12	$path = $this->getPath($key);
80
81	12	$expires_at = @filemtime($path);
82
83	12	if ($expires_at === false) {
84	11	return $default; // file not found
85		}
86
87	10	if ($this->getTime() >= $expires_at) {
88	4	@unlink($path); // file expired
		0 ignored issues – show Security Best Practice introduced 2016-11-28 14:37 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
89
90	4	return $default;
91		}
92
93	9	$data = @file_get_contents($path);
94
95	9	if ($data === false) {
96		return $default; // race condition: file not found
97		}
98
99	9	if ($data === 'b:0;') {
100		return false; // because we can't otherwise distinguish a FALSE return-value from unserialize()
101		}
102
103	9	$value = @unserialize($data);
104
105	9	if ($value === false) {
106		return $default; // unserialize() failed
107		}
108
109	9	return $value;
110		}
111
112	13	public function set($key, $value, $ttl = null)
113		{
114	13	$path = $this->getPath($key);
115
116	13	$dir = dirname($path);
117
118	13	if (! file_exists($dir)) {
119		// ensure that the parent path exists:
120	11	$this->mkdir($dir);
121		}
122
123	13	$temp_path = $this->cache_path . DIRECTORY_SEPARATOR . uniqid('', true);
124
125	13	if (is_int($ttl)) {
126	3	$expires_at = $this->getTime() + $ttl;
127	10	} elseif ($ttl instanceof DateInterval) {
128	1	$expires_at = date_create_from_format("U", $this->getTime())->add($ttl)->getTimestamp();
129	9	} elseif ($ttl === null) {
130	9	$expires_at = $this->getTime() + $this->default_ttl;
131		} else {
132		throw new InvalidArgumentException("invalid TTL: " . print_r($ttl, true));
133		}
134
135	13	if (false === @file_put_contents($temp_path, serialize($value))) {
136		return false;
137		}
138
139	13	if (false === @chmod($temp_path, $this->file_mode)) {
140		return false;
141		}
142
143	13	if (@touch($temp_path, $expires_at) && @rename($temp_path, $path)) {
144	13	return true;
145		}
146
147		@unlink($temp_path);
		0 ignored issues – show Security Best Practice introduced 2016-11-28 10:38 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
148
149		return false;
150		}
151
152	2	public function delete($key)
153		{
154	2	return @unlink($this->getPath($key));
155		}
156
157	14	public function clear()
158		{
159	14	$success = true;
160
161	14	$paths = $this->listPaths();
162
163	14	foreach ($paths as $path) {
164	9	if (! unlink($path)) {
165	9	$success = false;
166		}
167		}
168
169	14	return $success;
170		}
171
172	2	public function getMultiple($keys, $default = null)
173		{
174	2	if (! is_array($keys) && ! $keys instanceof Traversable) {
175	1	throw new InvalidArgumentException("keys must be either of type array or Traversable");
176		}
177
178	2	$values = [];
179
180	2	foreach ($keys as $key) {
181	2	$values[$key] = $this->get($key) ?: $default;
182		}
183
184	2	return $values;
		0 ignored issues – show Bug Best Practice introduced 2017-01-31 14:50 UTC by Report Bug Copy Issue Report The return type of `return $values;` (`array`) is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::getMultiple` of type `Psr\SimpleCache\iterable`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: 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()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
185		}
186
187	2	public function setMultiple($values, $ttl = null)
188		{
189	2	if (! is_array($values) && ! $values instanceof Traversable) {
190	1	throw new InvalidArgumentException("keys must be either of type array or Traversable");
191		}
192
193	2	$ok = true;
194
195	2	foreach ($values as $key => $value) {
196	2	$this->validateKey($key);
197	2	$ok = $this->set($key, $value, $ttl) && $ok;
198		}
199
200	2	return $ok;
201		}
202
203	1	public function deleteMultiple($keys)
204		{
205	1	if (! is_array($keys) && ! $keys instanceof Traversable) {
206	1	throw new InvalidArgumentException("keys must be either of type array or Traversable");
207		}
208
209	1	foreach ($keys as $key) {
210	1	$this->validateKey($key);
211	1	$this->delete($key);
212		}
213	1	}
214
215	1	public function has($key)
216		{
217	1	return $this->get($key, $this) !== $this;
218		}
219
220	2	public function increment($key, $step = 1)
221		{
222	2	$path = $this->getPath($key);
223
224	2	$dir = dirname($path);
225
226	2	if (! file_exists($dir)) {
227	2	$this->mkdir($dir); // ensure that the parent path exists
228		}
229
230	2	$lock_path = $dir . DIRECTORY_SEPARATOR . ".lock"; // allows max. 256 client locks at one time
231
232	2	$lock_handle = fopen($lock_path, "w");
233
234	2	flock($lock_handle, LOCK_EX);
235
236	2	$value = $this->get($key, 0) + $step;
237
238	2	$ok = $this->set($key, $value);
239
240	2	flock($lock_handle, LOCK_UN);
241
242	2	return $ok ? $value : false;
243		}
244
245	1	public function decrement($key, $step = 1)
246		{
247	1	return $this->increment($key, -$step);
248		}
249
250		/**
251		* Clean up expired cache-files.
252		*
253		* This method is outside the scope of the PSR-16 cache concept, and is specific to
254		* this implementation, being a file-cache.
255		*
256		* In scenarios with dynamic keys (such as Session IDs) you should call this method
257		* periodically - for example from a scheduled daily cron-job.
258		*
259		* @return void
260		*/
261	1	public function cleanExpired()
262		{
263	1	$now = $this->getTime();
264
265	1	$paths = $this->listPaths();
266
267	1	foreach ($paths as $path) {
268	1	if ($now > filemtime($path)) {
269	1	@unlink($path);
		0 ignored issues – show Security Best Practice introduced 2016-11-28 10:38 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
270		}
271		}
272	1	}
273
274		/**
275		* For a given cache key, obtain the absolute file path
276		*
277		* @param string $key
278		*
279		* @return string absolute path to cache-file
280		*
281		* @throws InvalidArgumentException if the specified key contains a character reserved by PSR-16
282		*/
283	14	protected function getPath($key)
284		{
285	14	$this->validateKey($key);
286
287	14	$hash = hash("sha256", $key);
288
289	14	return $this->cache_path
290	14	. DIRECTORY_SEPARATOR
291	14	. strtoupper($hash[0])
292	14	. DIRECTORY_SEPARATOR
293	14	. strtoupper($hash[1])
294	14	. DIRECTORY_SEPARATOR
295	14	. substr($hash, 2);
296		}
297
298		/**
299		* @return int current timestamp
300		*/
301	14	protected function getTime()
302		{
303	14	return time();
304		}
305
306		/**
307		* @return Generator\|string[]
308		*/
309	14	protected function listPaths()
310		{
311	14	$iterator = new RecursiveDirectoryIterator(
312	14	$this->cache_path,
313	14	FilesystemIterator::CURRENT_AS_PATHNAME \| FilesystemIterator::SKIP_DOTS
314		);
315
316	14	$iterator = new RecursiveIteratorIterator($iterator);
317
318	14	foreach ($iterator as $path) {
319	9	if (is_dir($path)) {
320		continue; // ignore directories
321		}
322
323	9	yield $path;
324		}
325	14	}
326
327		/**
328		* @param string $key
329		*
330		* @throws InvalidArgumentException
331		*/
332	14	protected function validateKey($key)
333		{
334	14	if (preg_match(self::PSR16_RESERVED, $key, $match) === 1) {
335	3	throw new InvalidArgumentException("invalid character in key: {$match[0]}");
336		}
337	14	}
338
339		/**
340		* Recursively create directories and apply permission mask
341		*
342		* @param string $path absolute directory path
343		*/
344	14	private function mkdir($path)
345		{
346	14	$parent_path = dirname($path);
347
348	14	if (!file_exists($parent_path)) {
349	13	$this->mkdir($parent_path); // recursively create parent dirs first
350		}
351
352	14	mkdir($path);
353	14	chmod($path, $this->dir_mode);
354	14	}
355		}
356

kodus / file-cache

Push — master ( b82dbc...a94e20 )

FileCache C

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

17 Methods

How to fix Complexity

Complex Class

Duplication Side-by-Side

Filter issues like