FileCache::flush() - Code Metrics - EVE-KILL/zKillboard - Measure and Improve Code Quality continuously with Scrutinizer

FileCache::flush() A
last analyzed 2016-02-10 18:51 UTC

↳ Parent: FileCache

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Metric	Value
dl	0
loc	8
rs	9.4285
cc	2
eloc	4
nc	2
nop	0

<?php
/* zCache
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * FileCache for zKillboard (Basically copies what Memcached does)
 */
class FileCache extends AbstractCache
{
	/**
	 * @param $cacheDir the default cache dir
	 * @param $cacheTime the default cache time (5 minutes)
	 */

	protected $cacheDir = "cache/queryCache/";
	protected $cacheTime = 300;

	/**
	 * @param string $cd a dir to use instead of default
	 */
	public function __construct($cd = null)
	{
		global $cacheDir;
		if (isset($cacheDir) && $cd === null) {
			$cd = $cacheDir;
		}

		if (!is_null($cd)) $this->cacheDir = $cd;
		if (!is_dir($this->cacheDir)) mkdir($this->cacheDir);
	}

	/**
	 * Gets the data
	 *
	 * @param string $key
	 * @return array|boolean
	 */
	public function get($key)
	{
		if(file_exists($this->cacheDir.sha1($key)))
		{
			$time = time();
			$data = self::getData($key);
			$age = $data["age"];
			$data = json_decode($data["data"], true);
			if($age <= $time)
			{
				@unlink($this->cacheDir.sha1($key));
// For example instead of
@mkdir($dir);

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

	/**
	 * Sets data
	 *
	 * @param string $key
	 * @param string|array $value
	 * @param string $timeout
	 *
	 * return bool
	 */
	public function set($key, $value, $timeout)
	{
		return self::setData($key, $value, $timeout) !== false;
	}

	/**
	 * Replaces data
	 *
	 * @param string $key
	 * @param string|array $value
	 * @param string $timeout
	 * @return boolean
	 */
	public function replace($key, $value, $timeout)
	{
		if(file_exists($this->cacheDir.sha1($key)))
		{
			@unlink($this->cacheDir.sha1($key));
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
			if(self::setData($key, $value, $timeout) !== false)
				return true;
		}

		return false;
	}

	/**
	 * Deletes a key
	 *
	 * @param string $key
	 * @return bool
	 */
	public function delete($key)
	{
		try
		{
			@unlink($this->cacheDir.sha1($key));
// For example instead of
@mkdir($dir);

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

	/**
	 * Increments value
	 *
	 * @param string $key
	 * @param int $step
	 * @param int $timeout
	 * @return bool
	 */
	public function increment($key, $step = 1, $timeout = 0)
	{
		$data = self::getData($key);
		$data = json_decode($data["data"], true);

		try
		{
			@unlink($this->cacheDir.sha1($key));
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
			return self::setData($key, $data+$step, $timeout);
		}
		catch (Exception $e)
		{
			return false;
		}
	}

	/**
	 * Decrements value
	 *
	 * @param string $key
	 * @param int $step
	 * @param int $timeout
	 * @return bool
	 */
	public function decrement($key, $step = 1, $timeout = 0)
	{
		$data = self::getData($key);
		$data = json_decode($data["data"], true);

		try
		{
			@unlink($this->cacheDir.sha1($key));
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
			return self::setData($key, $data-$step, $timeout);
		}
		catch (Exception $e)
		{
			return false;
		}
	}

	/**
	 * Flushes the cache
	 */
	public function flush()
	{
		$dir = opendir($this->cacheDir);
		while($file = readdir($dir))
		{
			@unlink($this->cacheDir.$file);
// For example instead of
@mkdir($dir);

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

	/**
	 * Sets data to cache file
	 *
	 * @param string $key
	 * @param string|array $value
	 * @param int $timeout
	 *
	 * return bool
	 */
	private function setData($key, $value, $timeout = NULL)
	{
		if(!$timeout)
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
			$timeout = $this->cacheTime;

		try
		{
			// fix, so timeout will be timestamp based
			$timeout = time() + $timeout;

			$data = $timeout."%".json_encode($value);
			if(@file_put_contents($this->cacheDir.sha1($key), $data) === false)
				return false;
		}
		catch (Exception $e)
		{
			return false;
		}
		return $value;
	}

	/**
	 * Gets the data from the cache
	 *
	 * @param string $key
	 * @param bool $sha
	 * @return array
	 */
	private function getData($key, $sha = true)
	{
		// @todo real error handling, not just surpression.
		if($sha == true)

			$data = @file_get_contents($this->cacheDir.sha1($key));
		else
			$data = @file_get_contents($this->cacheDir.$key);

		$f = explode("%", $data, 2); // We only want the first occurance of % exploded, not everything else aswell.
		$age = array_shift($f);
		$data = implode($f);
		return array("age" => (int) $age, "data" => $data);
	}

	/**
	 * Cleans up old and unused query cache files
	 */
	public function cleanUp()
	{
		$dir = opendir($this->cacheDir);
		while($file = readdir($dir))
		{
			if($file != "." && $file != "..")
			{
				$data = self::getData($file, false);
				$age = $data["age"];
				$time = time();
				if($age <= $time)
				{
					@unlink($this->cacheDir.$file);
// For example instead of
@mkdir($dir);

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


1			<?php
2			/* zCache
3			*
4			* This program is free software: you can redistribute it and/or modify
5			* it under the terms of the GNU Affero General Public License as published by
6			* the Free Software Foundation, either version 3 of the License, or
7			* (at your option) any later version.
8			*
9			* This program is distributed in the hope that it will be useful,
10			* but WITHOUT ANY WARRANTY; without even the implied warranty of
11			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12			* GNU Affero General Public License for more details.
13			*
14			* You should have received a copy of the GNU Affero General Public License
15			* along with this program. If not, see <http://www.gnu.org/licenses/>.
16			*/
17
18			/**
19			* FileCache for zKillboard (Basically copies what Memcached does)
20			*/
21			class FileCache extends AbstractCache
22			{
23			/**
24			* @param $cacheDir the default cache dir
25			* @param $cacheTime the default cache time (5 minutes)
26			*/
27
28			protected $cacheDir = "cache/queryCache/";
29			protected $cacheTime = 300;
30
31			/**
32			* @param string $cd a dir to use instead of default
33			*/
34			public function __construct($cd = null)
35			{
36			global $cacheDir;
37			if (isset($cacheDir) && $cd === null) {
38			$cd = $cacheDir;
39			}
40
41			if (!is_null($cd)) $this->cacheDir = $cd;
42			if (!is_dir($this->cacheDir)) mkdir($this->cacheDir);
43			}
44
45			/**
46			* Gets the data
47			*
48			* @param string $key
49			* @return array\|boolean
50			*/
51			public function get($key)
52			{
53			if(file_exists($this->cacheDir.sha1($key)))
54			{
55			$time = time();
56			$data = self::getData($key);
57			$age = $data["age"];
58			$data = json_decode($data["data"], true);
59			if($age <= $time)
60			{
61			@unlink($this->cacheDir.sha1($key));
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
62			return false;
63			}
64			return $data;
65			}
66			else
67			return false;
68			}
69
70			/**
71			* Sets data
72			*
73			* @param string $key
74			* @param string\|array $value
75			* @param string $timeout
76			*
77			* return bool
78			*/
79			public function set($key, $value, $timeout)
80			{
81			return self::setData($key, $value, $timeout) !== false;
82			}
83
84			/**
85			* Replaces data
86			*
87			* @param string $key
88			* @param string\|array $value
89			* @param string $timeout
90			* @return boolean
91			*/
92			public function replace($key, $value, $timeout)
93			{
94			if(file_exists($this->cacheDir.sha1($key)))
95			{
96			@unlink($this->cacheDir.sha1($key));
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
97			if(self::setData($key, $value, $timeout) !== false)
98			return true;
99			}
100
101			return false;
102			}
103
104			/**
105			* Deletes a key
106			*
107			* @param string $key
108			* @return bool
109			*/
110			public function delete($key)
111			{
112			try
113			{
114			@unlink($this->cacheDir.sha1($key));
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 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...
115			}
116			catch (Exception $e)
117			{
118			return false;
119			}
120			return true;
121			}
122
123			/**
124			* Increments value
125			*
126			* @param string $key
127			* @param int $step
128			* @param int $timeout
129			* @return bool
130			*/
131			public function increment($key, $step = 1, $timeout = 0)
132			{
133			$data = self::getData($key);
134			$data = json_decode($data["data"], true);
135
136			try
137			{
138			@unlink($this->cacheDir.sha1($key));
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 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 '.$dir.' could not be created.'); } Loading history...
139			return self::setData($key, $data+$step, $timeout);
140			}
141			catch (Exception $e)
142			{
143			return false;
144			}
145			}
146
147			/**
148			* Decrements value
149			*
150			* @param string $key
151			* @param int $step
152			* @param int $timeout
153			* @return bool
154			*/
155			public function decrement($key, $step = 1, $timeout = 0)
156			{
157			$data = self::getData($key);
158			$data = json_decode($data["data"], true);
159
160			try
161			{
162			@unlink($this->cacheDir.sha1($key));
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 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 '.$dir.' could not be created.'); } Loading history...
163			return self::setData($key, $data-$step, $timeout);
164			}
165			catch (Exception $e)
166			{
167			return false;
168			}
169			}
170
171			/**
172			* Flushes the cache
173			*/
174			public function flush()
175			{
176			$dir = opendir($this->cacheDir);
177			while($file = readdir($dir))
178			{
179			@unlink($this->cacheDir.$file);
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 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...
180			}
181			}
182
183			/**
184			* Sets data to cache file
185			*
186			* @param string $key
187			* @param string\|array $value
188			* @param int $timeout
189			*
190			* return bool
191			*/
192			private function setData($key, $value, $timeout = NULL)
193			{
194			if(!$timeout)
			0 ignored issues – show Bug Best Practice introduced 2015-12-13 23:29 UTC by Report Bug Copy Issue Report The expression `$timeout` of type `integer\|null` is loosely compared to `false`; this is ambiguous if the integer can be zero. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `integer` values, zero is a special case, in particular the following results might be unexpected: 0 == false // true 0 == null // true 123 == false // false 123 == null // false // It is often better to use strict comparison 0 === false // false 0 === null // false Loading history...
195			$timeout = $this->cacheTime;
196
197			try
198			{
199			// fix, so timeout will be timestamp based
200			$timeout = time() + $timeout;
201
202			$data = $timeout."%".json_encode($value);
203			if(@file_put_contents($this->cacheDir.sha1($key), $data) === false)
204			return false;
205			}
206			catch (Exception $e)
207			{
208			return false;
209			}
210			return $value;
211			}
212
213			/**
214			* Gets the data from the cache
215			*
216			* @param string $key
217			* @param bool $sha
218			* @return array
219			*/
220			private function getData($key, $sha = true)
221			{
222			// @todo real error handling, not just surpression.
223			if($sha == true)
			0 ignored issues – show Coding Style Best Practice introduced 2015-12-13 23:29 UTC by Report Bug Copy Issue Report It seems like you are loosely comparing two booleans. Considering using the strict comparison `===` instead. When comparing two booleans, it is generally considered safer to use the strict comparison operator. Loading history...
224			$data = @file_get_contents($this->cacheDir.sha1($key));
225			else
226			$data = @file_get_contents($this->cacheDir.$key);
227
228			$f = explode("%", $data, 2); // We only want the first occurance of % exploded, not everything else aswell.
229			$age = array_shift($f);
230			$data = implode($f);
231			return array("age" => (int) $age, "data" => $data);
232			}
233
234			/**
235			* Cleans up old and unused query cache files
236			*/
237			public function cleanUp()
238			{
239			$dir = opendir($this->cacheDir);
240			while($file = readdir($dir))
241			{
242			if($file != "." && $file != "..")
243			{
244			$data = self::getData($file, false);
245			$age = $data["age"];
246			$time = time();
247			if($age <= $time)
248			{
249			@unlink($this->cacheDir.$file);
			0 ignored issues – show Security Best Practice introduced 2015-12-13 23:29 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
250			}
251			}
252			}
253			}
254			}
255

EVE-KILL / zKillboard

FileCache::flush() A last analyzed 2016-02-10 18:51 UTC

Complexity

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Duplication

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FileCache::flush() A
last analyzed 2016-02-10 18:51 UTC