Pingback::getOrCreatePingbackId() - Code Metrics - Inspection of "Daily Inspection: Merge "Avoid the use of DB rollb..." - wikimedia/mediawiki - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Branch — master (c42d81)

unknown

created 2016-07-22 17:18 UTC

Pingback::getOrCreatePingbackId() B

↳ Parent: Pingback

Complexity

Conditions	4
Paths	4

Size

Total Lines	26
Code Lines	17

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
cc	4
eloc	17
nc	4
nop	0
dl	0
loc	26
rs	8.5806
c	1
b	0
f	1

<?php
/**
 * Send information about this MediaWiki instance to MediaWiki.org.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

use Psr\Log\LoggerInterface;
use MediaWiki\Logger\LoggerFactory;

/**
 * Send information about this MediaWiki instance to MediaWiki.org.
 *
 * @since 1.28
 */
class Pingback {

	/**
	 * @var int Revision ID of the JSON schema that describes the pingback
	 *   payload. The schema lives on MetaWiki, at
	 *   <https://meta.wikimedia.org/wiki/Schema:MediaWikiPingback>.
	 */
	const SCHEMA_REV = 15781718;

	/** @var LoggerInterface */
	protected $logger;

	/** @var Config */
	protected $config;

	/** @var string updatelog key (also used as cache/db lock key) */
	protected $key;

	/** @var string Randomly-generated identifier for this wiki */
	protected $id;

	/**
	 * @param Config $config
	 * @param LoggerInterface $logger
	 */
	public function __construct( Config $config = null, LoggerInterface $logger = null ) {
		$this->config = $config ?: RequestContext::getMain()->getConfig();
		$this->logger = $logger ?: LoggerFactory::getInstance( __CLASS__ );
		$this->key = 'Pingback-' . $this->config->get( 'Version' );
	}

	/**
	 * Should a pingback be sent?
	 * @return bool
	 */
	private function shouldSend() {
		return $this->config->get( 'Pingback' ) && !$this->checkIfSent();
	}

	/**
	 * Has a pingback already been sent for this MediaWiki version?
	 * @return bool
	 */
	private function checkIfSent() {
		$dbr = wfGetDB( DB_SLAVE );
		$sent = $dbr->selectField(
			'updatelog', '1', [ 'ul_key' => $this->key ], __METHOD__ );
		return $sent !== false;
	}

	/**
	 * Record the fact that we have sent a pingback for this MediaWiki version,
	 * to ensure we don't submit data multiple times.
	 */
	private function markSent() {
		$dbw = wfGetDB( DB_MASTER );
		return $dbw->insert(
			'updatelog', [ 'ul_key' => $this->key ], __METHOD__, 'IGNORE' );
	}

	/**
	 * Acquire lock for sending a pingback
	 *
	 * This ensures only one thread can attempt to send a pingback at any given
	 * time and that we wait an hour before retrying failed attempts.
	 *
	 * @return bool Whether lock was acquired
	 */
	private function acquireLock() {
		$cache = ObjectCache::getLocalClusterInstance();
		if ( !$cache->add( $this->key, 1, 60 * 60 ) ) {
			return false;  // throttled
		}

		$dbw = wfGetDB( DB_MASTER );
		if ( !$dbw->lock( $this->key, __METHOD__, 0 ) ) {
			return false;  // already in progress
		}

		return true;
	}

	/**
	 * Collect basic data about this MediaWiki installation and return it
	 * as an associative array conforming to the Pingback schema on MetaWiki
	 * (<https://meta.wikimedia.org/wiki/Schema:MediaWikiPingback>).
	 *
	 * @return array
	 */
	private function getData() {
// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

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

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
		$event = [
			'database'   => $this->config->get( 'DBtype' ),
			'MediaWiki'  => $this->config->get( 'Version' ),
			'PHP'        => PHP_VERSION,
			'OS'         => PHP_OS . ' ' . php_uname( 'r' ),
			'arch'       => PHP_INT_SIZE === 8 ? 64 : 32,
			'machine'    => php_uname( 'm' ),
		];

		if ( isset( $_SERVER['SERVER_SOFTWARE'] ) ) {
			$event['serverSoftware'] = $_SERVER['SERVER_SOFTWARE'];
		}

		$limit = ini_get( 'memory_limit' );
		if ( $limit && $limit != -1 ) {
			$event['memoryLimit'] = $limit;
		}

		return [
			'schema'           => 'MediaWikiPingback',
			'revision'         => self::SCHEMA_REV,
			'wiki'             => $this->getOrCreatePingbackId(),
			'event'            => $event,
		];
	}

	/**
	 * Get a unique, stable identifier for this wiki
	 *
	 * If the identifier does not already exist, create it and save it in the
	 * database. The identifier is randomly-generated.
	 *
	 * @return string 32-character hex string
	 */
	private function getOrCreatePingbackId() {
		if ( !$this->id ) {
			$id = wfGetDB( DB_SLAVE )->selectField(
				'updatelog', 'ul_value', [ 'ul_key' => 'PingBack' ] );

			if ( $id == false ) {
				$id = MWCryptRand::generateHex( 32 );
				$dbw = wfGetDB( DB_MASTER );
				$dbw->insert(
					'updatelog',
					[ 'ul_key' => 'PingBack', 'ul_value' => $id ],
					__METHOD__,
					'IGNORE'
				);

				if ( !$dbw->affectedRows() ) {
					$id = $dbw->selectField(
						'updatelog', 'ul_value', [ 'ul_key' => 'PingBack' ] );
				}
			}

			$this->id = $id;
		}

		return $this->id;
	}

	/**
	 * Serialize pingback data and send it to MediaWiki.org via a POST
	 * to its event beacon endpoint.
	 *
	 * The data encoding conforms to the expectations of EventLogging,
	 * a software suite used by the Wikimedia Foundation for logging and
	 * processing analytic data.
	 *
	 * Compare:
	 * <https://github.com/wikimedia/mediawiki-extensions-EventLogging/
	 *   blob/7e5fe4f1ef/includes/EventLogging.php#L32-L74>
	 *
	 * @param data Pingback data as an associative array
	 * @return bool true on success, false on failure
	 */
	private function postPingback( array $data ) {
		$json = FormatJson::encode( $data );
		$queryString = rawurlencode( str_replace( ' ', '\u0020', $json ) ) . ';';
		$url = 'https://www.mediawiki.org/beacon/event?' . $queryString;
		return Http::post( $url ) !== false;
	}

	/**
	 * Send information about this MediaWiki instance to MediaWiki.org.
	 *
	 * The data is structured and serialized to match the expectations of
	 * EventLogging, a software suite used by the Wikimedia Foundation for
	 * logging and processing analytic data.
	 *
	 * Compare:
	 * <https://github.com/wikimedia/mediawiki-extensions-EventLogging/
	 *   blob/7e5fe4f1ef/includes/EventLogging.php#L32-L74>
	 *
	 * The schema for the data is located at:
	 * <https://meta.wikimedia.org/wiki/Schema:MediaWikiPingback>
	 */
	public function sendPingback() {
		if ( !$this->acquireLock() ) {
			$this->logger->debug( __METHOD__ . ": couldn't acquire lock" );
			return false;
		}

		$data = $this->getData();
		if ( !$this->postPingback( $data ) ) {
			$this->logger->warning( __METHOD__ . ": failed to send pingback; check 'http' log" );
			return false;
		}

		$this->markSent();
		$this->logger->debug( __METHOD__ . ": pingback sent OK ({$this->key})" );
		return true;
	}

	/**
	 * Schedule a deferred callable that will check if a pingback should be
	 * sent and (if so) proceed to send it.
	 */
	public static function schedulePingback() {
		DeferredUpdates::addCallableUpdate( function () {
			$instance = new Pingback;
			if ( $instance->shouldSend() ) {
				$instance->sendPingback();
			}
		} );
	}
}


1			<?php
2			/**
3			* Send information about this MediaWiki instance to MediaWiki.org.
4			*
5			* This program is free software; you can redistribute it and/or modify
6			* it under the terms of the GNU General Public License as published by
7			* the Free Software Foundation; either version 2 of the License, or
8			* (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15			* You should have received a copy of the GNU General Public License along
16			* with this program; if not, write to the Free Software Foundation, Inc.,
17			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18			* http://www.gnu.org/copyleft/gpl.html
19			*
20			* @file
21			*/
22
23			use Psr\Log\LoggerInterface;
24			use MediaWiki\Logger\LoggerFactory;
25
26			/**
27			* Send information about this MediaWiki instance to MediaWiki.org.
28			*
29			* @since 1.28
30			*/
31			class Pingback {
32
33			/**
34			* @var int Revision ID of the JSON schema that describes the pingback
35			* payload. The schema lives on MetaWiki, at
36			* <https://meta.wikimedia.org/wiki/Schema:MediaWikiPingback>.
37			*/
38			const SCHEMA_REV = 15781718;
39
40			/** @var LoggerInterface */
41			protected $logger;
42
43			/** @var Config */
44			protected $config;
45
46			/** @var string updatelog key (also used as cache/db lock key) */
47			protected $key;
48
49			/** @var string Randomly-generated identifier for this wiki */
50			protected $id;
51
52			/**
53			* @param Config $config
54			* @param LoggerInterface $logger
55			*/
56			public function __construct( Config $config = null, LoggerInterface $logger = null ) {
57			$this->config = $config ?: RequestContext::getMain()->getConfig();
58			$this->logger = $logger ?: LoggerFactory::getInstance( __CLASS__ );
59			$this->key = 'Pingback-' . $this->config->get( 'Version' );
60			}
61
62			/**
63			* Should a pingback be sent?
64			* @return bool
65			*/
66			private function shouldSend() {
67			return $this->config->get( 'Pingback' ) && !$this->checkIfSent();
68			}
69
70			/**
71			* Has a pingback already been sent for this MediaWiki version?
72			* @return bool
73			*/
74			private function checkIfSent() {
75			$dbr = wfGetDB( DB_SLAVE );
76			$sent = $dbr->selectField(
77			'updatelog', '1', [ 'ul_key' => $this->key ], __METHOD__ );
78			return $sent !== false;
79			}
80
81			/**
82			* Record the fact that we have sent a pingback for this MediaWiki version,
83			* to ensure we don't submit data multiple times.
84			*/
85			private function markSent() {
86			$dbw = wfGetDB( DB_MASTER );
87			return $dbw->insert(
88			'updatelog', [ 'ul_key' => $this->key ], __METHOD__, 'IGNORE' );
89			}
90
91			/**
92			* Acquire lock for sending a pingback
93			*
94			* This ensures only one thread can attempt to send a pingback at any given
95			* time and that we wait an hour before retrying failed attempts.
96			*
97			* @return bool Whether lock was acquired
98			*/
99			private function acquireLock() {
100			$cache = ObjectCache::getLocalClusterInstance();
101			if ( !$cache->add( $this->key, 1, 60 * 60 ) ) {
102			return false; // throttled
103			}
104
105			$dbw = wfGetDB( DB_MASTER );
106			if ( !$dbw->lock( $this->key, __METHOD__, 0 ) ) {
107			return false; // already in progress
108			}
109
110			return true;
111			}
112
113			/**
114			* Collect basic data about this MediaWiki installation and return it
115			* as an associative array conforming to the Pingback schema on MetaWiki
116			* (<https://meta.wikimedia.org/wiki/Schema:MediaWikiPingback>).
117			*
118			* @return array
119			*/
120			private function getData() {
			0 ignored issues – show Coding Style introduced 2016-07-22 17:43 UTC by Report Bug Copy Issue Report `getData` uses the super-global variable `$_SERVER` which is generally not recommended. Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: // Bad class Router { public function generate($path) { return $_SERVER['HOST'].$path; } } // Better class Router { private $host; public function __construct($host) { $this->host = $host; } public function generate($path) { return $this->host.$path; } } class Controller { public function myAction(Request $request) { // Instead of $page = isset($_GET['page']) ? intval($_GET['page']) : 1; // Better (assuming you use the Symfony2 request) $page = $request->query->get('page', 1); } } Loading history...
121			$event = [
122			'database' => $this->config->get( 'DBtype' ),
123			'MediaWiki' => $this->config->get( 'Version' ),
124			'PHP' => PHP_VERSION,
125			'OS' => PHP_OS . ' ' . php_uname( 'r' ),
126			'arch' => PHP_INT_SIZE === 8 ? 64 : 32,
127			'machine' => php_uname( 'm' ),
128			];
129
130			if ( isset( $_SERVER['SERVER_SOFTWARE'] ) ) {
131			$event['serverSoftware'] = $_SERVER['SERVER_SOFTWARE'];
132			}
133
134			$limit = ini_get( 'memory_limit' );
135			if ( $limit && $limit != -1 ) {
136			$event['memoryLimit'] = $limit;
137			}
138
139			return [
140			'schema' => 'MediaWikiPingback',
141			'revision' => self::SCHEMA_REV,
142			'wiki' => $this->getOrCreatePingbackId(),
143			'event' => $event,
144			];
145			}
146
147			/**
148			* Get a unique, stable identifier for this wiki
149			*
150			* If the identifier does not already exist, create it and save it in the
151			* database. The identifier is randomly-generated.
152			*
153			* @return string 32-character hex string
154			*/
155			private function getOrCreatePingbackId() {
156			if ( !$this->id ) {
157			$id = wfGetDB( DB_SLAVE )->selectField(
158			'updatelog', 'ul_value', [ 'ul_key' => 'PingBack' ] );
159
160			if ( $id == false ) {
161			$id = MWCryptRand::generateHex( 32 );
162			$dbw = wfGetDB( DB_MASTER );
163			$dbw->insert(
164			'updatelog',
165			[ 'ul_key' => 'PingBack', 'ul_value' => $id ],
166			__METHOD__,
167			'IGNORE'
168			);
169
170			if ( !$dbw->affectedRows() ) {
171			$id = $dbw->selectField(
172			'updatelog', 'ul_value', [ 'ul_key' => 'PingBack' ] );
173			}
174			}
175
176			$this->id = $id;
177			}
178
179			return $this->id;
180			}
181
182			/**
183			* Serialize pingback data and send it to MediaWiki.org via a POST
184			* to its event beacon endpoint.
185			*
186			* The data encoding conforms to the expectations of EventLogging,
187			* a software suite used by the Wikimedia Foundation for logging and
188			* processing analytic data.
189			*
190			* Compare:
191			* <https://github.com/wikimedia/mediawiki-extensions-EventLogging/
192			* blob/7e5fe4f1ef/includes/EventLogging.php#L32-L74>
193			*
194			* @param data Pingback data as an associative array
195			* @return bool true on success, false on failure
196			*/
197			private function postPingback( array $data ) {
198			$json = FormatJson::encode( $data );
199			$queryString = rawurlencode( str_replace( ' ', '\u0020', $json ) ) . ';';
200			$url = 'https://www.mediawiki.org/beacon/event?' . $queryString;
201			return Http::post( $url ) !== false;
202			}
203
204			/**
205			* Send information about this MediaWiki instance to MediaWiki.org.
206			*
207			* The data is structured and serialized to match the expectations of
208			* EventLogging, a software suite used by the Wikimedia Foundation for
209			* logging and processing analytic data.
210			*
211			* Compare:
212			* <https://github.com/wikimedia/mediawiki-extensions-EventLogging/
213			* blob/7e5fe4f1ef/includes/EventLogging.php#L32-L74>
214			*
215			* The schema for the data is located at:
216			* <https://meta.wikimedia.org/wiki/Schema:MediaWikiPingback>
217			*/
218			public function sendPingback() {
219			if ( !$this->acquireLock() ) {
220			$this->logger->debug( __METHOD__ . ": couldn't acquire lock" );
221			return false;
222			}
223
224			$data = $this->getData();
225			if ( !$this->postPingback( $data ) ) {
226			$this->logger->warning( __METHOD__ . ": failed to send pingback; check 'http' log" );
227			return false;
228			}
229
230			$this->markSent();
231			$this->logger->debug( __METHOD__ . ": pingback sent OK ({$this->key})" );
232			return true;
233			}
234
235			/**
236			* Schedule a deferred callable that will check if a pingback should be
237			* sent and (if so) proceed to send it.
238			*/
239			public static function schedulePingback() {
240			DeferredUpdates::addCallableUpdate( function () {
241			$instance = new Pingback;
242			if ( $instance->shouldSend() ) {
243			$instance->sendPingback();
244			}
245			} );
246			}
247			}
248

wikimedia / mediawiki

Branch — master (c42d81)

Pingback::getOrCreatePingbackId() B

Complexity

Size

Duplication

Importance

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