MediaWiki  1.33.0
HTMLFileCache.php
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1 <?php
25 
34  const MODE_NORMAL = 0; // normal cache mode
35  const MODE_OUTAGE = 1; // fallback cache for DB outages
36  const MODE_REBUILD = 2; // background cache rebuild mode
37 
43  public function __construct( $title, $action ) {
44  parent::__construct();
45 
46  $allowedTypes = self::cacheablePageActions();
47  if ( !in_array( $action, $allowedTypes ) ) {
48  throw new MWException( 'Invalid file cache type given.' );
49  }
50  $this->mKey = ( $title instanceof Title )
51  ? $title->getPrefixedDBkey()
52  : (string)$title;
53  $this->mType = (string)$action;
54  $this->mExt = 'html';
55  }
56 
61  protected static function cacheablePageActions() {
62  return [ 'view', 'history' ];
63  }
64 
69  protected function cacheDirectory() {
70  return $this->baseCacheDirectory(); // no subdir for b/c with old cache files
71  }
72 
79  protected function typeSubdirectory() {
80  if ( $this->mType === 'view' ) {
81  return ''; // b/c to not skip existing cache
82  } else {
83  return $this->mType . '/';
84  }
85  }
86 
93  public static function useFileCache( IContextSource $context, $mode = self::MODE_NORMAL ) {
94  $config = MediaWikiServices::getInstance()->getMainConfig();
95 
96  if ( !$config->get( 'UseFileCache' ) && $mode !== self::MODE_REBUILD ) {
97  return false;
98  } elseif ( $config->get( 'DebugToolbar' ) ) {
99  wfDebug( "HTML file cache skipped. \$wgDebugToolbar on\n" );
100 
101  return false;
102  }
103 
104  // Get all query values
105  $queryVals = $context->getRequest()->getValues();
106  foreach ( $queryVals as $query => $val ) {
107  if ( $query === 'title' || $query === 'curid' ) {
108  continue; // note: curid sets title
109  // Normal page view in query form can have action=view.
110  } elseif ( $query === 'action' && in_array( $val, self::cacheablePageActions() ) ) {
111  continue;
112  // Below are header setting params
113  } elseif ( $query === 'maxage' || $query === 'smaxage' ) {
114  continue;
115  }
116 
117  return false;
118  }
119 
120  $user = $context->getUser();
121  // Check for non-standard user language; this covers uselang,
122  // and extensions for auto-detecting user language.
123  $ulang = $context->getLanguage();
124 
125  // Check that there are no other sources of variation
126  if ( $user->getId() ||
127  !$ulang->equals( MediaWikiServices::getInstance()->getContentLanguage() ) ) {
128  return false;
129  }
130 
131  if ( ( $mode === self::MODE_NORMAL ) && $user->getNewtalk() ) {
132  return false;
133  }
134 
135  // Allow extensions to disable caching
136  return Hooks::run( 'HTMLFileCache::useFileCache', [ $context ] );
137  }
138 
145  public function loadFromFileCache( IContextSource $context, $mode = self::MODE_NORMAL ) {
146  $config = MediaWikiServices::getInstance()->getMainConfig();
147 
148  wfDebug( __METHOD__ . "()\n" );
149  $filename = $this->cachePath();
150 
151  if ( $mode === self::MODE_OUTAGE ) {
152  // Avoid DB errors for queries in sendCacheControl()
153  $context->getTitle()->resetArticleID( 0 );
154  }
155 
156  $context->getOutput()->sendCacheControl();
157  header( "Content-Type: {$config->get( 'MimeType' )}; charset=UTF-8" );
158  header( 'Content-Language: ' .
159  MediaWikiServices::getInstance()->getContentLanguage()->getHtmlCode() );
160  if ( $this->useGzip() ) {
161  if ( wfClientAcceptsGzip() ) {
162  header( 'Content-Encoding: gzip' );
163  readfile( $filename );
164  } else {
165  /* Send uncompressed */
166  wfDebug( __METHOD__ . " uncompressing cache file and sending it\n" );
167  readgzfile( $filename );
168  }
169  } else {
170  readfile( $filename );
171  }
172 
173  $context->getOutput()->disable(); // tell $wgOut that output is taken care of
174  }
175 
188  public function saveToFileCache( $text ) {
189  if ( strlen( $text ) < 512 ) {
190  // Disabled or empty/broken output (OOM and PHP errors)
191  return $text;
192  }
193 
194  wfDebug( __METHOD__ . "()\n", 'private' );
195 
196  $now = wfTimestampNow();
197  if ( $this->useGzip() ) {
198  $text = str_replace(
199  '</html>', '<!-- Cached/compressed ' . $now . " -->\n</html>", $text );
200  } else {
201  $text = str_replace(
202  '</html>', '<!-- Cached ' . $now . " -->\n</html>", $text );
203  }
204 
205  // Store text to FS...
206  $compressed = $this->saveText( $text );
207  if ( $compressed === false ) {
208  return $text; // error
209  }
210 
211  // gzip output to buffer as needed and set headers...
212  // @todo Ugly wfClientAcceptsGzip() function - use context!
213  if ( $this->useGzip() && wfClientAcceptsGzip() ) {
214  header( 'Content-Encoding: gzip' );
215 
216  return $compressed;
217  }
218 
219  return $text;
220  }
221 
227  public static function clearFileCache( Title $title ) {
228  $config = MediaWikiServices::getInstance()->getMainConfig();
229 
230  if ( !$config->get( 'UseFileCache' ) ) {
231  return false;
232  }
233 
234  foreach ( self::cacheablePageActions() as $type ) {
235  $fc = new self( $title, $type );
236  $fc->clearCache();
237  }
238 
239  return true;
240  }
241 }
HTMLFileCache\useFileCache
static useFileCache(IContextSource $context, $mode=self::MODE_NORMAL)
Check if pages can be cached for this request/user.
Definition: HTMLFileCache.php:93
$user
return true to allow those checks to and false if checking is done & $user
Definition: hooks.txt:1476
FileCacheBase\saveText
saveText( $text)
Save and compress text to the cache.
Definition: FileCacheBase.php:159
$context
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Definition: hooks.txt:2636
HTMLFileCache\clearFileCache
static clearFileCache(Title $title)
Clear the file caches for a page for all actions.
Definition: HTMLFileCache.php:227
HTMLFileCache
Page view caching in the file system.
Definition: HTMLFileCache.php:33
HTMLFileCache\MODE_OUTAGE
const MODE_OUTAGE
Definition: HTMLFileCache.php:35
HTMLFileCache\typeSubdirectory
typeSubdirectory()
Get the cache type subdirectory (with the trailing slash) or the empty string Alter the type -> direc...
Definition: HTMLFileCache.php:79
MediaWiki\getTitle
getTitle()
Get the Title object that we'll be acting on, as specified in the WebRequest.
Definition: MediaWiki.php:137
HTMLFileCache\cacheablePageActions
static cacheablePageActions()
Cacheable actions.
Definition: HTMLFileCache.php:61
HTMLFileCache\saveToFileCache
saveToFileCache( $text)
Save this cache object with the given text.
Definition: HTMLFileCache.php:188
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
$query
null for the wiki Added should default to null in handler for backwards compatibility add a value to it if you want to add a cookie that have to vary cache options can modify $query
Definition: hooks.txt:1588
MWException
MediaWiki exception.
Definition: MWException.php:26
$title
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:925
FileCacheBase\useGzip
useGzip()
Check if the cache is gzipped.
Definition: FileCacheBase.php:136
FileCacheBase\baseCacheDirectory
baseCacheDirectory()
Get the base file cache directory.
Definition: FileCacheBase.php:52
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
wfTimestampNow
wfTimestampNow()
Convenience function; returns MediaWiki timestamp for the present time.
Definition: GlobalFunctions.php:1941
wfDebug
wfDebug( $text, $dest='all', array $context=[])
Sends a line to the debug log if enabled or, optionally, to a comment in output.
Definition: GlobalFunctions.php:949
string
This code would result in ircNotify being run twice when an article is and once for brion Hooks can return three possible true was required This is the default since MediaWiki *some string
Definition: hooks.txt:175
HTMLFileCache\__construct
__construct( $title, $action)
Definition: HTMLFileCache.php:43
wfClientAcceptsGzip
wfClientAcceptsGzip( $force=false)
Whether the client accept gzip encoding.
Definition: GlobalFunctions.php:1542
HTMLFileCache\MODE_NORMAL
const MODE_NORMAL
Definition: HTMLFileCache.php:34
IContextSource
Interface for objects which can provide a MediaWiki context on request.
Definition: IContextSource.php:53
Title
Represents a title within MediaWiki.
Definition: Title.php:40
HTMLFileCache\loadFromFileCache
loadFromFileCache(IContextSource $context, $mode=self::MODE_NORMAL)
Read from cache to context output.
Definition: HTMLFileCache.php:145
as
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
HTMLFileCache\MODE_REBUILD
const MODE_REBUILD
Definition: HTMLFileCache.php:36
FileCacheBase\cachePath
cachePath()
Get the path to the cache file.
Definition: FileCacheBase.php:68
HTMLFileCache\cacheDirectory
cacheDirectory()
Get the base file cache directory.
Definition: HTMLFileCache.php:69
MediaWikiServices
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 MediaWikiServices
Definition: injection.txt:23
Hooks\run
static run( $event, array $args=[], $deprecatedVersion=null)
Call hook functions defined in Hooks::register and $wgHooks.
Definition: Hooks.php:200
FileCacheBase
Base class for data storage in the file system.
Definition: FileCacheBase.php:29
$type
$type
Definition: testCompression.php:48