+++ /dev/null
-<?php
-/**
- * Contain the HTMLFileCache class
- * @file
- * @ingroup Cache
- */
-
-/**
- * Handles talking to the file cache, putting stuff in and taking it back out.
- * Mostly called from Article.php for the emergency abort/fallback to cache.
- *
- * Global options that affect this module:
- * - $wgCachePages
- * - $wgCacheEpoch
- * - $wgUseFileCache
- * - $wgCacheDirectory
- * - $wgFileCacheDirectory
- * - $wgUseGzip
- *
- * @ingroup Cache
- */
-class HTMLFileCache {
- var $mTitle, $mFileCache, $mType;
-
- public function __construct( &$title, $type = 'view' ) {
- $this->mTitle = $title;
- $this->mType = ($type == 'raw' || $type == 'view' ) ? $type : false;
- $this->fileCacheName(); // init name
- }
-
- public function fileCacheName() {
- if( !$this->mFileCache ) {
- global $wgCacheDirectory, $wgFileCacheDirectory, $wgFileCacheDepth;
-
- if ( $wgFileCacheDirectory ) {
- $dir = $wgFileCacheDirectory;
- } elseif ( $wgCacheDirectory ) {
- $dir = "$wgCacheDirectory/html";
- } else {
- throw new MWException( 'Please set $wgCacheDirectory in LocalSettings.php if you wish to use the HTML file cache' );
- }
-
- # Store raw pages (like CSS hits) elsewhere
- $subdir = ($this->mType === 'raw') ? 'raw/' : '';
-
- $key = $this->mTitle->getPrefixedDbkey();
- if ( $wgFileCacheDepth > 0 ) {
- $hash = md5( $key );
- for ( $i = 1; $i <= $wgFileCacheDepth; $i++ ) {
- $subdir .= substr( $hash, 0, $i ) . '/';
- }
- }
- # Avoid extension confusion
- $key = str_replace( '.', '%2E', urlencode( $key ) );
- $this->mFileCache = "{$dir}/{$subdir}{$key}.html";
-
- if( $this->useGzip() ) {
- $this->mFileCache .= '.gz';
- }
-
- wfDebug( __METHOD__ . ": {$this->mFileCache}\n" );
- }
- return $this->mFileCache;
- }
-
- public function isFileCached() {
- if( $this->mType === false ) return false;
- return file_exists( $this->fileCacheName() );
- }
-
- public function fileCacheTime() {
- return wfTimestamp( TS_MW, filemtime( $this->fileCacheName() ) );
- }
-
- /**
- * Check if pages can be cached for this request/user
- * @return bool
- */
- public static function useFileCache() {
- global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
- if( !$wgUseFileCache ) return false;
- // Get all query values
- $queryVals = $wgRequest->getValues();
- foreach( $queryVals as $query => $val ) {
- if( $query == 'title' || $query == 'curid' ) continue;
- // Normal page view in query form can have action=view.
- // Raw hits for pages also stored, like .css pages for example.
- else if( $query == 'action' && ($val == 'view' || $val == 'raw') ) continue;
- else if( $query == 'usemsgcache' && $val == 'yes' ) continue;
- // Below are header setting params
- else if( $query == 'maxage' || $query == 'smaxage' || $query == 'ctype' || $query == 'gen' )
- continue;
- else
- return false;
- }
- // Check for non-standard user language; this covers uselang,
- // and extensions for auto-detecting user language.
- $ulang = $wgLang->getCode();
- $clang = $wgContLang->getCode();
- // Check that there are no other sources of variation
- return !$wgShowIPinHeader && !$wgUser->getId() && !$wgUser->getNewtalk() && $ulang == $clang;
- }
-
- /*
- * Check if up to date cache file exists
- * @param $timestamp string
- */
- public function isFileCacheGood( $timestamp = '' ) {
- global $wgCacheEpoch;
-
- if( !$this->isFileCached() ) return false;
-
- $cachetime = $this->fileCacheTime();
- $good = $timestamp <= $cachetime && $wgCacheEpoch <= $cachetime;
-
- wfDebug( __METHOD__ . ": cachetime $cachetime, touched '{$timestamp}' epoch {$wgCacheEpoch}, good $good\n");
- return $good;
- }
-
- public function useGzip() {
- global $wgUseGzip;
- return $wgUseGzip;
- }
-
- /* In handy string packages */
- public function fetchRawText() {
- return file_get_contents( $this->fileCacheName() );
- }
-
- public function fetchPageText() {
- if( $this->useGzip() ) {
- /* Why is there no gzfile_get_contents() or gzdecode()? */
- return implode( '', gzfile( $this->fileCacheName() ) );
- } else {
- return $this->fetchRawText();
- }
- }
-
- /* Working directory to/from output */
- public function loadFromFileCache() {
- global $wgOut, $wgMimeType, $wgOutputEncoding, $wgLanguageCode;
- wfDebug( __METHOD__ . "()\n");
- $filename = $this->fileCacheName();
- // Raw pages should handle cache control on their own,
- // even when using file cache. This reduces hits from clients.
- if( $this->mType !== 'raw' ) {
- $wgOut->sendCacheControl();
- header( "Content-Type: $wgMimeType; charset={$wgOutputEncoding}" );
- header( "Content-Language: $wgLanguageCode" );
- }
-
- if( $this->useGzip() ) {
- if( wfClientAcceptsGzip() ) {
- header( 'Content-Encoding: gzip' );
- } else {
- /* Send uncompressed */
- readgzfile( $filename );
- return;
- }
- }
- readfile( $filename );
- $wgOut->disable(); // tell $wgOut that output is taken care of
- }
-
- protected function checkCacheDirs() {
- $filename = $this->fileCacheName();
- $mydir2 = substr($filename,0,strrpos($filename,'/')); # subdirectory level 2
- $mydir1 = substr($mydir2,0,strrpos($mydir2,'/')); # subdirectory level 1
-
- wfMkdirParents( $mydir1 );
- wfMkdirParents( $mydir2 );
- }
-
- public function saveToFileCache( $text ) {
- global $wgUseFileCache;
- if( !$wgUseFileCache || strlen( $text ) < 512 ) {
- // Disabled or empty/broken output (OOM and PHP errors)
- return $text;
- }
-
- wfDebug( __METHOD__ . "()\n", false);
-
- $this->checkCacheDirs();
-
- $f = fopen( $this->fileCacheName(), 'w' );
- if($f) {
- $now = wfTimestampNow();
- if( $this->useGzip() ) {
- $rawtext = str_replace( '</html>',
- '<!-- Cached/compressed '.$now." -->\n</html>",
- $text );
- $text = gzencode( $rawtext );
- } else {
- $text = str_replace( '</html>',
- '<!-- Cached '.$now." -->\n</html>",
- $text );
- }
- fwrite( $f, $text );
- fclose( $f );
- if( $this->useGzip() ) {
- if( wfClientAcceptsGzip() ) {
- header( 'Content-Encoding: gzip' );
- return $text;
- } else {
- return $rawtext;
- }
- } else {
- return $text;
- }
- }
- return $text;
- }
-
- public static function clearFileCache( $title ) {
- global $wgUseFileCache;
-
- if ( !$wgUseFileCache ) {
- return false;
- }
-
- wfSuppressWarnings();
-
- $fc = new self( $title, 'view' );
- unlink( $fc->fileCacheName() );
-
- $fc = new self( $title, 'raw' );
- unlink( $fc->fileCacheName() );
-
- wfRestoreWarnings();
-
- return true;
- }
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff