*
*/
define( 'MSG_LOAD_TIMEOUT', 60 );
-define( 'MSG_LOCK_TIMEOUT', 10 );
-define( 'MSG_WAIT_TIMEOUT', 10 );
+define( 'MSG_LOCK_TIMEOUT', 30 );
+define( 'MSG_WAIT_TIMEOUT', 30 );
define( 'MSG_CACHE_VERSION', 1 );
/**
* Get the signleton instance of this class
*
* @since 1.18
- * @return MessageCache object
+ * @return MessageCache
*/
public static function singleton() {
if ( is_null( self::$instance ) ) {
global $wgUseDatabaseMessages, $wgMsgCacheExpiry;
- self::$instance = new self( wfGetMessageCacheStorage(), $wgUseDatabaseMessages, $wgMsgCacheExpiry );
+ self::$instance = new self(
+ wfGetMessageCacheStorage(),
+ $wgUseDatabaseMessages,
+ $wgMsgCacheExpiry
+ );
}
return self::$instance;
}
/**
* Try to load the cache from a local file.
- * Actual format of the file depends on the $wgLocalMessageCacheSerialized
- * setting.
*
* @param string $hash the hash of contents, to check validity.
- * @param $code Mixed: Optional language code, see documenation of load().
- * @return bool on failure.
+ * @param Mixed $code Optional language code, see documenation of load().
+ * @return array The cache array
*/
- function loadFromLocal( $hash, $code ) {
- global $wgCacheDirectory, $wgLocalMessageCacheSerialized;
+ function getLocalCache( $hash, $code ) {
+ global $wgCacheDirectory;
$filename = "$wgCacheDirectory/messages-" . wfWikiID() . "-$code";
return false; // No cache file
}
- if ( $wgLocalMessageCacheSerialized ) {
- // Check to see if the file has the hash specified
- $localHash = fread( $file, 32 );
- if ( $hash === $localHash ) {
- // All good, get the rest of it
- $serialized = '';
- while ( !feof( $file ) ) {
- $serialized .= fread( $file, 100000 );
- }
- fclose( $file );
- return $this->setCache( unserialize( $serialized ), $code );
- } else {
- fclose( $file );
- return false; // Wrong hash
+ // Check to see if the file has the hash specified
+ $localHash = fread( $file, 32 );
+ if ( $hash === $localHash ) {
+ // All good, get the rest of it
+ $serialized = '';
+ while ( !feof( $file ) ) {
+ $serialized .= fread( $file, 100000 );
}
+ fclose( $file );
+ return unserialize( $serialized );
} else {
- $localHash = substr( fread( $file, 40 ), 8 );
fclose( $file );
- if ( $hash != $localHash ) {
- return false; // Wrong hash
- }
-
- # Require overwrites the member variable or just shadows it?
- require( $filename );
- return $this->setCache( $this->mCache, $code );
+ return false; // Wrong hash
}
}
wfRestoreWarnings();
}
- function saveToScript( $array, $hash, $code ) {
- global $wgCacheDirectory;
-
- $filename = "$wgCacheDirectory/messages-" . wfWikiID() . "-$code";
- $tempFilename = $filename . '.tmp';
- wfMkdirParents( $wgCacheDirectory, null, __METHOD__ ); // might fail
-
- wfSuppressWarnings();
- $file = fopen( $tempFilename, 'w' );
- wfRestoreWarnings();
-
- if ( !$file ) {
- wfDebug( "Unable to open local cache file for writing\n" );
- return;
- }
-
- fwrite( $file, "<?php\n//$hash\n\n \$this->mCache = array(" );
-
- foreach ( $array as $key => $message ) {
- $key = $this->escapeForScript( $key );
- $message = $this->escapeForScript( $message );
- fwrite( $file, "'$key' => '$message',\n" );
- }
-
- fwrite( $file, ");\n?>" );
- fclose( $file);
- rename( $tempFilename, $filename );
- }
-
- function escapeForScript( $string ) {
- $string = str_replace( '\\', '\\\\', $string );
- $string = str_replace( '\'', '\\\'', $string );
- return $string;
- }
-
- /**
- * Set the cache to $cache, if it is valid. Otherwise set the cache to false.
- *
- * @return bool
- */
- function setCache( $cache, $code ) {
- if ( isset( $cache['VERSION'] ) && $cache['VERSION'] == MSG_CACHE_VERSION ) {
- $this->mCache[$code] = $cache;
- return true;
- } else {
- return false;
- }
- }
-
/**
* Loads messages from caches or from database in this order:
* (1) local message cache (if $wgUseLocalMessageCache is enabled)
* or false if populating empty cache fails. Also returns true if MessageCache
* is disabled.
*
- * @param bool|String $code String: language to which load messages
+ * @param bool|String $code Language to which load messages
* @throws MWException
* @return bool
*/
function load( $code = false ) {
global $wgUseLocalMessageCache;
- $exception = null; // deferred error
-
- if( !is_string( $code ) ) {
+ if ( !is_string( $code ) ) {
# This isn't really nice, so at least make a note about it and try to
# fall back
wfDebug( __METHOD__ . " called without providing a language code\n" );
# Loading code starts
wfProfileIn( __METHOD__ );
$success = false; # Keep track of success
+ $staleCache = false; # a cache array with expired data, or false if none has been loaded
$where = array(); # Debug info, delayed to avoid spamming debug log too much
$cacheKey = wfMemcKey( 'messages', $code ); # Key in memc for messages
- # (1) local cache
+ # Local cache
# Hash of the contents is stored in memcache, to detect if local cache goes
- # out of date (due to update in other thread?)
+ # out of date (e.g. due to replace() on some other server)
if ( $wgUseLocalMessageCache ) {
wfProfileIn( __METHOD__ . '-fromlocal' );
$hash = $this->mMemc->get( wfMemcKey( 'messages', $code, 'hash' ) );
if ( $hash ) {
- $success = $this->loadFromLocal( $hash, $code );
- if ( $success ) $where[] = 'got from local cache';
+ $cache = $this->getLocalCache( $hash, $code );
+ if ( !$cache ) {
+ $where[] = 'local cache is empty or has the wrong hash';
+ } elseif ( $this->isCacheExpired( $cache ) ) {
+ $where[] = 'local cache is expired';
+ $staleCache = $cache;
+ } else {
+ $where[] = 'got from local cache';
+ $success = true;
+ $this->mCache[$code] = $cache;
+ }
}
wfProfileOut( __METHOD__ . '-fromlocal' );
}
- # (2) memcache
- # Fails if nothing in cache, or in the wrong version.
if ( !$success ) {
- wfProfileIn( __METHOD__ . '-fromcache' );
- $cache = $this->mMemc->get( $cacheKey );
- $success = $this->setCache( $cache, $code );
- if ( $success ) {
- $where[] = 'got from global cache';
- $this->saveToCaches( $cache, false, $code );
- }
- wfProfileOut( __METHOD__ . '-fromcache' );
- }
+ # Try the global cache. If it is empty, try to acquire a lock. If
+ # the lock can't be acquired, wait for the other thread to finish
+ # and then try the global cache a second time.
+ for ( $failedAttempts = 0; $failedAttempts < 2; $failedAttempts++ ) {
+ wfProfileIn( __METHOD__ . '-fromcache' );
+ $cache = $this->mMemc->get( $cacheKey );
+ if ( !$cache ) {
+ $where[] = 'global cache is empty';
+ } elseif ( $this->isCacheExpired( $cache ) ) {
+ $where[] = 'global cache is expired';
+ $staleCache = $cache;
+ } else {
+ $where[] = 'got from global cache';
+ $this->mCache[$code] = $cache;
+ $this->saveToCaches( $cache, 'local-only', $code );
+ $success = true;
+ }
- # (3)
- # Nothing in caches... so we need create one and store it in caches
- if ( !$success ) {
- $where[] = 'cache is empty';
- $where[] = 'loading from database';
-
- if ( $this->lock( $cacheKey ) ) {
- $that = $this;
- $osc = new ScopedCallback( function() use ( $that, $cacheKey ) {
- $that->unlock( $cacheKey );
- } );
- }
- # Limit the concurrency of loadFromDB to a single process
- # This prevents the site from going down when the cache expires
- $statusKey = wfMemcKey( 'messages', $code, 'status' );
- $success = $this->mMemc->add( $statusKey, 'loading', MSG_LOAD_TIMEOUT );
- if ( $success ) { // acquired lock
- $cache = $this->mMemc;
- $isc = new ScopedCallback( function() use ( $cache, $statusKey ) {
- $cache->delete( $statusKey );
- } );
- $cache = $this->loadFromDB( $code );
- $success = $this->setCache( $cache, $code );
- if ( $success ) { // messages loaded
- $success = $this->saveToCaches( $cache, true, $code );
- $isc = null; // unlock
- if ( !$success ) {
- $this->mMemc->set( $statusKey, 'error', 60 * 5 );
- wfDebug( __METHOD__ . ": set() error: restart memcached server!\n" );
- $exception = new MWException( "Could not save cache for '$code'." );
+ wfProfileOut( __METHOD__ . '-fromcache' );
+
+ if ( $success ) {
+ # Done, no need to retry
+ break;
+ }
+
+ # We need to call loadFromDB. Limit the concurrency to a single
+ # process. This prevents the site from going down when the cache
+ # expires.
+ $statusKey = wfMemcKey( 'messages', $code, 'status' );
+ $acquired = $this->mMemc->add( $statusKey, 'loading', MSG_LOAD_TIMEOUT );
+ if ( $acquired ) {
+ # Unlock the status key if there is an exception
+ $that = $this;
+ $statusUnlocker = new ScopedCallback( function () use ( $that, $statusKey ) {
+ $that->mMemc->delete( $statusKey );
+ } );
+
+ # Now let's regenerate
+ $where[] = 'loading from database';
+
+ # Lock the cache to prevent conflicting writes
+ # If this lock fails, it doesn't really matter, it just means the
+ # write is potentially non-atomic, e.g. the results of a replace()
+ # may be discarded.
+ if ( $this->lock( $cacheKey ) ) {
+ $mainUnlocker = new ScopedCallback( function () use ( $that, $cacheKey ) {
+ $that->unlock( $cacheKey );
+ } );
+ } else {
+ $mainUnlocker = null;
+ $where[] = 'could not acquire main lock';
+ }
+
+ $cache = $this->loadFromDB( $code );
+ $this->mCache[$code] = $cache;
+ $success = true;
+ $saveSuccess = $this->saveToCaches( $cache, 'all', $code );
+
+ # Unlock
+ ScopedCallback::consume( $mainUnlocker );
+ ScopedCallback::consume( $statusUnlocker );
+
+ if ( !$saveSuccess ) {
+ # Cache save has failed.
+ # There are two main scenarios where this could be a problem:
+ #
+ # - The cache is more than the maximum size (typically
+ # 1MB compressed).
+ #
+ # - Memcached has no space remaining in the relevant slab
+ # class. This is unlikely with recent versions of
+ # memcached.
+ #
+ # Either way, if there is a local cache, nothing bad will
+ # happen. If there is no local cache, disabling the message
+ # cache for all requests avoids incurring a loadFromDB()
+ # overhead on every request, and thus saves the wiki from
+ # complete downtime under moderate traffic conditions.
+ if ( !$wgUseLocalMessageCache ) {
+ $this->mMemc->set( $statusKey, 'error', 60 * 5 );
+ $where[] = 'could not save cache, disabled globally for 5 minutes';
+ } else {
+ $where[] = "could not save global cache";
+ }
}
+
+ # Load from DB complete, no need to retry
+ break;
+ } elseif ( $staleCache ) {
+ # Use the stale cache while some other thread constructs the new one
+ $where[] = 'using stale cache';
+ $this->mCache[$code] = $staleCache;
+ $success = true;
+ break;
+ } elseif ( $failedAttempts > 0 ) {
+ # Already retried once, still failed, so don't do another lock/unlock cycle
+ # This case will typically be hit if memcached is down, or if
+ # loadFromDB() takes longer than MSG_WAIT_TIMEOUT
+ $where[] = "could not acquire status key.";
+ break;
} else {
- $isc = null; // unlock
- $exception = new MWException( "Could not load cache from DB for '$code'." );
+ $status = $this->mMemc->get( $statusKey );
+ if ( $status === 'error' ) {
+ # Disable cache
+ break;
+ } else {
+ # Wait for the other thread to finish, then retry
+ $where[] = 'waited for other thread to complete';
+ $this->lock( $cacheKey );
+ $this->unlock( $cacheKey );
+ }
}
- } else {
- $exception = new MWException( "Could not acquire '$statusKey' lock." );
}
- $osc = null; // unlock
}
if ( !$success ) {
+ $where[] = 'loading FAILED - cache is disabled';
$this->mDisable = true;
$this->mCache = false;
- // This used to go on, but that led to lots of nasty side
- // effects like gadgets and sidebar getting cached with their
- // default content
- if ( $exception instanceof Exception ) {
- throw $exception;
- } else {
- throw new MWException( "MessageCache failed to load messages" );
- }
+ # This used to throw an exception, but that led to nasty side effects like
+ # the whole wiki being instantly down if the memcached server died
} else {
# All good, just record the success
- $info = implode( ', ', $where );
- wfDebug( __METHOD__ . ": Loading $code... $info\n" );
$this->mLoadedLanguages[$code] = true;
}
+ $info = implode( ', ', $where );
+ wfDebug( __METHOD__ . ": Loading $code... $info\n" );
wfProfileOut( __METHOD__ );
return $success;
}
* $wgMaxMsgCacheEntrySize are assigned a special value, and are loaded
* on-demand from the database later.
*
- * @param string $code language code.
- * @return Array: loaded messages for storing in caches.
+ * @param string $code Language code.
+ * @return array Loaded messages for storing in caches.
*/
function loadFromDB( $code ) {
wfProfileIn( __METHOD__ );
foreach ( $res as $row ) {
$text = Revision::getRevisionText( $row );
- if( $text === false ) {
+ if ( $text === false ) {
// Failed to fetch data; possible ES errors?
// Store a marker to fetch on-demand as a workaround...
$entry = '!TOO BIG';
- wfDebugLog( 'MessageCache', __METHOD__ . ": failed to load message page text for {$row->page_title} ($code)" );
+ wfDebugLog(
+ 'MessageCache',
+ __METHOD__
+ . ": failed to load message page text for {$row->page_title} ($code)"
+ );
} else {
$entry = ' ' . $text;
}
}
$cache['VERSION'] = MSG_CACHE_VERSION;
+ $cache['EXPIRY'] = wfTimestamp( TS_MW, time() + $this->mExpiry );
wfProfileOut( __METHOD__ );
return $cache;
}
/**
* Updates cache as necessary when message page is changed
*
- * @param string $title name of the page changed.
- * @param $text Mixed: new contents of the page.
+ * @param string $title Name of the page changed.
+ * @param mixed $text New contents of the page.
*/
public function replace( $title, $text ) {
global $wgMaxMsgCacheEntrySize;
}
# Update caches
- $this->saveToCaches( $this->mCache[$code], true, $code );
+ $this->saveToCaches( $this->mCache[$code], 'all', $code );
$this->unlock( $cacheKey );
// Also delete cached sidebar... just in case it is affected
wfProfileOut( __METHOD__ );
}
+ /**
+ * Is the given cache array expired due to time passing or a version change?
+ *
+ * @param $cache
+ * @return bool
+ */
+ protected function isCacheExpired( $cache ) {
+ if ( !isset( $cache['VERSION'] ) || !isset( $cache['EXPIRY'] ) ) {
+ return true;
+ }
+ if ( $cache['VERSION'] != MSG_CACHE_VERSION ) {
+ return true;
+ }
+ if ( wfTimestampNow() >= $cache['EXPIRY'] ) {
+ return true;
+ }
+ return false;
+ }
+
/**
* Shortcut to update caches.
*
- * @param array $cache cached messages with a version.
- * @param bool $memc Wether to update or not memcache.
- * @param string $code Language code.
- * @return bool on somekind of error.
+ * @param array $cache Cached messages with a version.
+ * @param string $dest Either "local-only" to save to local caches only
+ * or "all" to save to all caches.
+ * @param string|bool $code Language code (default: false)
+ * @return bool
*/
- protected function saveToCaches( $cache, $memc = true, $code = false ) {
+ protected function saveToCaches( $cache, $dest, $code = false ) {
wfProfileIn( __METHOD__ );
- global $wgUseLocalMessageCache, $wgLocalMessageCacheSerialized;
+ global $wgUseLocalMessageCache;
$cacheKey = wfMemcKey( 'messages', $code );
- if ( $memc ) {
- $success = $this->mMemc->set( $cacheKey, $cache, $this->mExpiry );
+ if ( $dest === 'all' ) {
+ $success = $this->mMemc->set( $cacheKey, $cache );
} else {
$success = true;
}
if ( $wgUseLocalMessageCache ) {
$serialized = serialize( $cache );
$hash = md5( $serialized );
- $this->mMemc->set( wfMemcKey( 'messages', $code, 'hash' ), $hash, $this->mExpiry );
- if ( $wgLocalMessageCacheSerialized ) {
- $this->saveToLocal( $serialized, $hash, $code );
- } else {
- $this->saveToScript( $cache, $hash, $code );
- }
+ $this->mMemc->set( wfMemcKey( 'messages', $code, 'hash' ), $hash );
+ $this->saveToLocal( $serialized, $hash, $code );
}
wfProfileOut( __METHOD__ );
/**
* Represents a write lock on the messages key
*
- * @param $key string
- *
+ * @param string $key
* @return Boolean: success
*/
function lock( $key ) {
$lockKey = $key . ':lock';
- for ( $i = 0; $i < MSG_WAIT_TIMEOUT && !$this->mMemc->add( $lockKey, 1, MSG_LOCK_TIMEOUT ); $i++ ) {
+ $acquired = false;
+ $testDone = false;
+ for ( $i = 0; $i < MSG_WAIT_TIMEOUT && !$acquired; $i++ ) {
+ $acquired = $this->mMemc->add( $lockKey, 1, MSG_LOCK_TIMEOUT );
+ if ( $acquired ) {
+ break;
+ }
+
+ # Fail fast if memcached is totally down
+ if ( !$testDone ) {
+ $testDone = true;
+ if ( !$this->mMemc->set( wfMemcKey( 'test' ), 'test', 1 ) ) {
+ break;
+ }
+ }
sleep( 1 );
}
- return $i >= MSG_WAIT_TIMEOUT;
+ return $acquired;
}
function unlock( $key ) {
/**
* Get a message from either the content language or the user language.
*
- * @param $key String: the message cache key
- * @param $useDB Boolean: get the message from the DB, false to use only
- * the localisation
- * @param bool|string $langcode Code of the language to get the message for, if
- * it is a valid code create a language for that language,
- * if it is a string but not a valid code then make a basic
- * language object, if it is a false boolean then use the
- * current users language (as a fallback for the old
- * parameter functionality), or if it is a true boolean
- * then use the wikis content language (also as a
- * fallback).
- * @param $isFullKey Boolean: specifies whether $key is a two part key
+ * First, assemble a list of languages to attempt getting the message from. This
+ * chain begins with the requested language and its fallbacks and then continues with
+ * the content language and its fallbacks. For each language in the chain, the following
+ * process will occur (in this order):
+ * 1. If a language-specific override, i.e., [[MW:msg/lang]], is available, use that.
+ * Note: for the content language, there is no /lang subpage.
+ * 2. Fetch from the static CDB cache.
+ * 3. If available, check the database for fallback language overrides.
+ *
+ * This process provides a number of guarantees. When changing this code, make sure all
+ * of these guarantees are preserved.
+ * * If the requested language is *not* the content language, then the CDB cache for that
+ * specific language will take precedence over the root database page ([[MW:msg]]).
+ * * Fallbacks will be just that: fallbacks. A fallback language will never be reached if
+ * the message is available *anywhere* in the language for which it is a fallback.
+ *
+ * @param string $key the message key
+ * @param bool $useDB If true, look for the message in the DB, false
+ * to use only the compiled l10n cache.
+ * @param bool|string|object $langcode Code of the language to get the message for.
+ * - If string and a valid code, will create a standard language object
+ * - If string but not a valid code, will create a basic language object
+ * - If boolean and false, create object from the current users language
+ * - If boolean and true, create object from the wikis content language
+ * - If language object, use it as given
+ * @param bool $isFullKey specifies whether $key is a two part key
* "msg/lang".
*
- * @throws MWException
- * @return string|bool
+ * @throws MWException when given an invalid key
+ * @return string|bool False if the message doesn't exist, otherwise the message (which can be empty)
*/
function get( $key, $useDB = true, $langcode = true, $isFullKey = false ) {
- global $wgLanguageCode, $wgContLang;
+ global $wgContLang;
- if ( is_int( $key ) ) {
- // "Non-string key given" exception sometimes happens for numerical strings that become ints somewhere on their way here
- $key = strval( $key );
- }
+ $section = new ProfileSection( __METHOD__ );
- if ( !is_string( $key ) ) {
+ if ( is_int( $key ) ) {
+ // Fix numerical strings that somehow become ints
+ // on their way here
+ $key = (string)$key;
+ } elseif ( !is_string( $key ) ) {
throw new MWException( 'Non-string key given' );
- }
-
- if ( strval( $key ) === '' ) {
- # Shortcut: the empty key is always missing
+ } elseif ( $key === '' ) {
+ // Shortcut: the empty key is always missing
return false;
}
- $lang = wfGetLangObj( $langcode );
- if ( !$lang ) {
- throw new MWException( "Bad lang code $langcode given" );
+ // For full keys, get the language code from the key
+ $pos = strrpos( $key, '/' );
+ if ( $isFullKey && $pos !== false ) {
+ $langcode = substr( $key, $pos + 1 );
+ $key = substr( $key, 0, $pos );
}
- $langcode = $lang->getCode();
-
- $message = false;
-
- # Normalise title-case input (with some inlining)
- $lckey = str_replace( ' ', '_', $key );
+ // Normalise title-case input (with some inlining)
+ $lckey = strtr( $key, ' ', '_');
if ( ord( $key ) < 128 ) {
$lckey[0] = strtolower( $lckey[0] );
$uckey = ucfirst( $lckey );
$uckey = $wgContLang->ucfirst( $lckey );
}
- # Try the MediaWiki namespace
- if( !$this->mDisable && $useDB ) {
- $title = $uckey;
- if( !$isFullKey && ( $langcode != $wgLanguageCode ) ) {
- $title .= '/' . $langcode;
- }
- $message = $this->getMsgFromNamespace( $title, $langcode );
- }
+ // Loop through each language in the fallback list until we find something useful
+ $lang = wfGetLangObj( $langcode );
+ $message = $this->getMessageFromFallbackChain( $lang, $lckey, $uckey, !$this->mDisable && $useDB );
- # Try the array in the language object
+ // If we still have no message, maybe the key was in fact a full key so try that
if ( $message === false ) {
- $message = $lang->getMessage( $lckey );
- if ( is_null( $message ) ) {
- $message = false;
- }
- }
-
- # Try the array of another language
- if( $message === false ) {
$parts = explode( '/', $lckey );
- # We may get calls for things that are http-urls from sidebar
- # Let's not load nonexistent languages for those
- # They usually have more than one slash.
+ // We may get calls for things that are http-urls from sidebar
+ // Let's not load nonexistent languages for those
+ // They usually have more than one slash.
if ( count( $parts ) == 2 && $parts[1] !== '' ) {
$message = Language::getMessageFor( $parts[0], $parts[1] );
- if ( is_null( $message ) ) {
+ if ( $message === null ) {
$message = false;
}
}
}
- # Is this a custom message? Try the default language in the db...
- if( ( $message === false || $message === '-' ) &&
- !$this->mDisable && $useDB &&
- !$isFullKey && ( $langcode != $wgLanguageCode ) ) {
+ // Post-processing if the message exists
+ if( $message !== false ) {
+ // Fix whitespace
+ $message = str_replace(
+ array(
+ # Fix for trailing whitespace, removed by textarea
+ ' ',
+ # Fix for NBSP, converted to space by firefox
+ ' ',
+ ' ',
+ ),
+ array(
+ ' ',
+ "\xc2\xa0",
+ "\xc2\xa0"
+ ),
+ $message
+ );
+ }
+
+ return $message;
+ }
+
+ /**
+ * Given a language, try and fetch a message from that language, then the
+ * fallbacks of that language, then the site language, then the fallbacks for the
+ * site language.
+ *
+ * @param Language $lang Requested language
+ * @param string $lckey Lowercase key for the message
+ * @param string $uckey Uppercase key for the message
+ * @param bool $useDB Whether to use the database
+ *
+ * @see MessageCache::get
+ * @return string|bool The message, or false if not found
+ */
+ protected function getMessageFromFallbackChain( $lang, $lckey, $uckey, $useDB ) {
+ global $wgLanguageCode, $wgContLang;
+
+ $langcode = $lang->getCode();
+ $message = false;
+
+ // First try the requested language.
+ if ( $useDB ) {
+ if ( $langcode === $wgLanguageCode ) {
+ // Messages created in the content language will not have the /lang extension
+ $message = $this->getMsgFromNamespace( $uckey, $langcode );
+ } else {
+ $message = $this->getMsgFromNamespace( "$uckey/$langcode", $langcode );
+ }
+ }
+
+ if ( $message !== false ) {
+ return $message;
+ }
+
+ // Check the CDB cache
+ $message = $lang->getMessage( $lckey );
+ if ( $message !== null ) {
+ return $message;
+ }
+
+ list( $fallbackChain, $siteFallbackChain ) = Language::getFallbacksIncludingSiteLanguage( $langcode );
+
+ // Next try checking the database for all of the fallback languages of the requested language.
+ if ( $useDB ) {
+ foreach ( $fallbackChain as $code ) {
+ if ( $code === $wgLanguageCode ) {
+ // Messages created in the content language will not have the /lang extension
+ $message = $this->getMsgFromNamespace( $uckey, $code );
+ } else {
+ $message = $this->getMsgFromNamespace( "$uckey/$code", $code );
+ }
+
+ if ( $message !== false ) {
+ // Found the message.
+ return $message;
+ }
+ }
+ }
+
+ // Now try checking the site language.
+ if ( $useDB ) {
$message = $this->getMsgFromNamespace( $uckey, $wgLanguageCode );
+ if ( $message !== false ) {
+ return $message;
+ }
}
- # Final fallback
- if( $message === false ) {
- return false;
+ $message = $wgContLang->getMessage( $lckey );
+ if ( $message !== null ) {
+ return $message;
}
- # Fix whitespace
- $message = strtr( $message,
- array(
- # Fix for trailing whitespace, removed by textarea
- ' ' => ' ',
- # Fix for NBSP, converted to space by firefox
- ' ' => "\xc2\xa0",
- ' ' => "\xc2\xa0",
- ) );
+ // Finally try the DB for the site language's fallbacks.
+ if ( $useDB ) {
+ foreach ( $siteFallbackChain as $code ) {
+ $message = $this->getMsgFromNamespace( "$uckey/$code", $code );
+ if ( $message === false && $code === $wgLanguageCode ) {
+ // Messages created in the content language will not have the /lang extension
+ $message = $this->getMsgFromNamespace( $uckey, $code );
+ }
- return $message;
+ if ( $message !== false ) {
+ // Found the message.
+ return $message;
+ }
+ }
+ }
+
+ return false;
}
/**
* and self::get() are some examples in core.
*
* @param string $title Message cache key with initial uppercase letter.
- * @param string $code code denoting the language to try.
- *
+ * @param string $code Code denoting the language to try.
* @return string|bool False on failure
*/
function getMsgFromNamespace( $title, $code ) {
return substr( $entry, 1 );
} elseif ( $entry === '!NONEXISTENT' ) {
return false;
- } elseif( $entry === '!TOO BIG' ) {
+ } elseif ( $entry === '!TOO BIG' ) {
// Fall through and try invididual message cache below
}
} else {
$content = $revision->getContent();
if ( !$content ) {
// A possibly temporary loading failure.
- wfDebugLog( 'MessageCache', __METHOD__ . ": failed to load message page text for {$title} ($code)" );
+ wfDebugLog(
+ 'MessageCache',
+ __METHOD__ . ": failed to load message page text for {$title} ($code)"
+ );
$message = null; // no negative caching
} else {
// XXX: Is this the right way to turn a Content object into a message?
- // NOTE: $content is typically either WikitextContent, JavaScriptContent or CssContent.
- // MessageContent is *not* used for storing messages, it's only used for wrapping them when needed.
+ // NOTE: $content is typically either WikitextContent, JavaScriptContent or
+ // CssContent. MessageContent is *not* used for storing messages, it's
+ // only used for wrapping them when needed.
$message = $content->getWikitextForTransclusion();
if ( $message === false || $message === null ) {
- wfDebugLog( 'MessageCache', __METHOD__ . ": message content doesn't provide wikitext "
- . "(content model: " . $content->getContentHandler() . ")" );
+ wfDebugLog(
+ 'MessageCache',
+ __METHOD__ . ": message content doesn't provide wikitext "
+ . "(content model: " . $content->getContentHandler() . ")"
+ );
$message = false; // negative caching
} else {
}
/**
- * @param $message string
- * @param $interface bool
- * @param $language
- * @param $title Title
+ * @param string $message
+ * @param bool $interface
+ * @param string $language Language code
+ * @param Title $title
* @return string
*/
function transform( $message, $interface = false, $language = null, $title = null ) {
// Avoid creating parser if nothing to transform
- if( strpos( $message, '{{' ) === false ) {
+ if ( strpos( $message, '{{' ) === false ) {
return $message;
}
}
/**
- * @param $text string
- * @param $title Title
- * @param $linestart bool
- * @param $interface bool
- * @param $language
+ * @param string $text
+ * @param Title $title
+ * @param bool $linestart Whether or not this is at the start of a line
+ * @param bool $interface Whether this is an interface message
+ * @param string $language Language code
* @return ParserOutput|string
*/
- public function parse( $text, $title = null, $linestart = true, $interface = false, $language = null ) {
+ public function parse( $text, $title = null, $linestart = true,
+ $interface = false, $language = null
+ ) {
if ( $this->mInParser ) {
return htmlspecialchars( $text );
}
public function figureMessage( $key ) {
global $wgLanguageCode;
$pieces = explode( '/', $key );
- if( count( $pieces ) < 2 ) {
+ if ( count( $pieces ) < 2 ) {
return array( $key, $wgLanguageCode );
}
$lang = array_pop( $pieces );
- if( !Language::fetchLanguageName( $lang, null, 'mw' ) ) {
+ if ( !Language::fetchLanguageName( $lang, null, 'mw' ) ) {
return array( $key, $wgLanguageCode );
}
* If $code is the content language code, this will return all message keys
* for which MediaWiki:msgkey exists. If $code is another language code, this
* will ONLY return message keys for which MediaWiki:msgkey/$code exists.
- * @param $code string
+ * @param string $code Language code
* @return array of message keys (strings)
*/
public function getAllMessageKeys( $code ) {
// Apparently load() failed
return null;
}
- $cache = $this->mCache[$code]; // Copy the cache
- unset( $cache['VERSION'] ); // Remove the VERSION key
- $cache = array_diff( $cache, array( '!NONEXISTENT' ) ); // Remove any !NONEXISTENT keys
+ // Remove administrative keys
+ $cache = $this->mCache[$code];
+ unset( $cache['VERSION'] );
+ unset( $cache['EXPIRY'] );
+ // Remove any !NONEXISTENT keys
+ $cache = array_diff( $cache, array( '!NONEXISTENT' ) );
// Keys may appear with a capital first letter. lcfirst them.
return array_map( array( $wgContLang, 'lcfirst' ), array_keys( $cache ) );
}
dépôts / lhc / web / wiklou.git / blobdiff