MediaWiki  1.29.1
FileContentsHasher.php
Go to the documentation of this file.
1 <?php
23 
25  protected $cache;
26 
28  private static $instance;
29 
33  public function __construct() {
34  $this->cache = ObjectCache::getLocalServerInstance( 'hash' );
35  }
36 
42  public static function singleton() {
43  if ( !self::$instance ) {
44  self::$instance = new self;
45  }
46 
47  return self::$instance;
48  }
49 
59  public function getFileContentsHashInternal( $filePath, $algo = 'md4' ) {
60  $mtime = filemtime( $filePath );
61  if ( $mtime === false ) {
62  return false;
63  }
64 
65  $cacheKey = $this->cache->makeGlobalKey( __CLASS__, $filePath, $mtime, $algo );
66  $hash = $this->cache->get( $cacheKey );
67 
68  if ( $hash ) {
69  return $hash;
70  }
71 
72  $contents = file_get_contents( $filePath );
73  if ( $contents === false ) {
74  return false;
75  }
76 
77  $hash = hash( $algo, $contents );
78  $this->cache->set( $cacheKey, $hash, 60 * 60 * 24 ); // 24h
79 
80  return $hash;
81  }
82 
92  public static function getFileContentsHash( $filePaths, $algo = 'md4' ) {
94 
95  if ( !is_array( $filePaths ) ) {
96  $filePaths = (array)$filePaths;
97  }
98 
99  MediaWiki\suppressWarnings();
100 
101  if ( count( $filePaths ) === 1 ) {
102  $hash = $instance->getFileContentsHashInternal( $filePaths[0], $algo );
103  MediaWiki\restoreWarnings();
104  return $hash;
105  }
106 
107  sort( $filePaths );
108  $hashes = array_map( function ( $filePath ) use ( $instance, $algo ) {
109  return $instance->getFileContentsHashInternal( $filePath, $algo ) ?: '';
110  }, $filePaths );
111 
112  MediaWiki\restoreWarnings();
113 
114  $hashes = implode( '', $hashes );
115  return $hashes ? hash( $algo, $hashes ) : false;
116  }
117 }
FileContentsHasher
Definition: FileContentsHasher.php:22
captcha-old.count
count
Definition: captcha-old.py:225
use
as see the revision history and available at free of to any person obtaining a copy of this software and associated documentation to deal in the Software without including without limitation the rights to use
Definition: MIT-LICENSE.txt:10
FileContentsHasher\$cache
BagOStuff $cache
Definition: FileContentsHasher.php:25
BagOStuff
interface is intended to be more or less compatible with the PHP memcached client.
Definition: BagOStuff.php:47
cache
you have access to all of the normal MediaWiki so you can get a DB use the cache
Definition: maintenance.txt:52
php
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
FileContentsHasher\getFileContentsHash
static getFileContentsHash( $filePaths, $algo='md4')
Get a hash of the combined contents of one or more files, either by retrieving a previously-computed ...
Definition: FileContentsHasher.php:92
FileContentsHasher\getFileContentsHashInternal
getFileContentsHashInternal( $filePath, $algo='md4')
Get a hash of a file's contents, either by retrieving a previously- computed hash from the cache,...
Definition: FileContentsHasher.php:59
FileContentsHasher\$instance
static FileContentsHasher $instance
Definition: FileContentsHasher.php:28
FileContentsHasher\__construct
__construct()
Constructor.
Definition: FileContentsHasher.php:33
$hashes
$hashes
Definition: testCompression.php:64
FileContentsHasher\singleton
static singleton()
Get the singleton instance of this class.
Definition: FileContentsHasher.php:42
array
the array() calling protocol came about after MediaWiki 1.4rc1.
ObjectCache\getLocalServerInstance
static getLocalServerInstance( $fallback=CACHE_NONE)
Factory function for CACHE_ACCEL (referenced from DefaultSettings.php)
Definition: ObjectCache.php:288