| Index: branches/stable/phase3/includes/CacheManager.php |
| — | — | @@ -0,0 +1,151 @@ |
| | 2 | +<? |
| | 3 | + |
| | 4 | +# Handles talking to the file cache, putting stuff in and taking it back out. |
| | 5 | +# Mostly called from Article.php, also from DatabaseFunctions.php for the |
| | 6 | +# emergency abort/fallback to cache. |
| | 7 | + |
| | 8 | +# Global options that affect this module: |
| | 9 | +# $wgCachePages |
| | 10 | +# $wgCacheEpoch |
| | 11 | +# $wgUseFileCache |
| | 12 | +# $wgFileCacheDirectory |
| | 13 | +# $wgUseGzip |
| | 14 | + |
| | 15 | +include_once( "Title.php" ); |
| | 16 | + |
| | 17 | +class CacheManager { |
| | 18 | + var $mTitle, $mFileCache; |
| | 19 | + |
| | 20 | + function CacheManager( &$title ) { |
| | 21 | + $this->mTitle =& $title; |
| | 22 | + $this->mFileCache = ""; |
| | 23 | + } |
| | 24 | + |
| | 25 | + function fileCacheName() { |
| | 26 | + global $wgFileCacheDirectory, $wgLang; |
| | 27 | + if( !$this->mFileCache ) { |
| | 28 | + $hash = md5( $key = $this->mTitle->getDbkey() ); |
| | 29 | + if( $this->mTitle->getNamespace() ) |
| | 30 | + $key = $wgLang->getNsText( $this->mTitle->getNamespace() ) . ":" . $key; |
| | 31 | + $key = str_replace( ".", "%2E", urlencode( $key ) ); |
| | 32 | + |
| | 33 | + $hash1 = substr( $hash, 0, 1 ); |
| | 34 | + $hash2 = substr( $hash, 0, 2 ); |
| | 35 | + $this->mFileCache = "{$wgFileCacheDirectory}/{$hash1}/{$hash2}/{$key}.html"; |
| | 36 | + |
| | 37 | + if($this->useGzip()) |
| | 38 | + $this->mFileCache .= ".gz"; |
| | 39 | + |
| | 40 | + wfDebug( " fileCacheName() - {$this->mFileCache}\n" ); |
| | 41 | + } |
| | 42 | + return $this->mFileCache; |
| | 43 | + } |
| | 44 | + |
| | 45 | + function isFileCached() { |
| | 46 | + return file_exists( $this->fileCacheName() ); |
| | 47 | + } |
| | 48 | + |
| | 49 | + function fileCacheTime() { |
| | 50 | + return wfUnix2Timestamp( filemtime( $this->fileCacheName() ) ); |
| | 51 | + } |
| | 52 | + |
| | 53 | + function isFileCacheGood( $timestamp ) { |
| | 54 | + global $wgCacheEpoch; |
| | 55 | + |
| | 56 | + if( !$this->isFileCached() ) return false; |
| | 57 | + |
| | 58 | + $cachetime = $this->fileCacheTime(); |
| | 59 | + $good = (( $timestamp <= $cachetime ) && |
| | 60 | + ( $wgCacheEpoch <= $cachetime )); |
| | 61 | + |
| | 62 | + wfDebug(" isFileCacheGood() - cachetime $cachetime, touched {$timestamp} epoch {$wgCacheEpoch}, good $good\n"); |
| | 63 | + return $good; |
| | 64 | + } |
| | 65 | + |
| | 66 | + function useGzip() { |
| | 67 | + global $wgUseGzip; |
| | 68 | + return $wgUseGzip; |
| | 69 | + } |
| | 70 | + |
| | 71 | + /* In handy string packages */ |
| | 72 | + function fetchRawText() { |
| | 73 | + return file_get_contents( $this->fileCacheName() ); |
| | 74 | + } |
| | 75 | + |
| | 76 | + function fetchPageText() { |
| | 77 | + if( $this->useGzip() ) { |
| | 78 | + /* Why is there no gzfile_get_contents() or gzdecode()? */ |
| | 79 | + return implode( "", gzfile( $this->fileCacheName() ) ); |
| | 80 | + } else { |
| | 81 | + return $this->fetchRawText(); |
| | 82 | + } |
| | 83 | + } |
| | 84 | + |
| | 85 | + /* Working directory to/from output */ |
| | 86 | + function loadFromFileCache() { |
| | 87 | + global $wgOut; |
| | 88 | + wfDebug(" loadFromFileCache()\n"); |
| | 89 | + |
| | 90 | + $filename=$this->fileCacheName(); |
| | 91 | + $wgOut->sendCacheControl(); |
| | 92 | + |
| | 93 | + if( $this->useGzip() ) { |
| | 94 | + if( wfClientAcceptsGzip() ) { |
| | 95 | + header( "Content-Encoding: gzip" ); |
| | 96 | + } else { |
| | 97 | + /* Send uncompressed */ |
| | 98 | + readgzfile( $filename ); |
| | 99 | + return; |
| | 100 | + } |
| | 101 | + } |
| | 102 | + readfile( $filename ); |
| | 103 | + } |
| | 104 | + |
| | 105 | + function checkCacheDirs() { |
| | 106 | + $filename = $this->fileCacheName(); |
| | 107 | + $mydir2=substr($filename,0,strrpos($filename,"/")); # subdirectory level 2 |
| | 108 | + $mydir1=substr($mydir2,0,strrpos($mydir2,"/")); # subdirectory level 1 |
| | 109 | + |
| | 110 | + if(!file_exists($mydir1)) { mkdir($mydir1,0775); } # create if necessary |
| | 111 | + if(!file_exists($mydir2)) { mkdir($mydir2,0775); } |
| | 112 | + } |
| | 113 | + |
| | 114 | + function saveToFileCache( $text ) { |
| | 115 | + if(strcmp($text,"") == 0) return ""; |
| | 116 | + |
| | 117 | + wfDebug(" saveToFileCache()\n", false); |
| | 118 | + |
| | 119 | + $this->checkCacheDirs(); |
| | 120 | + |
| | 121 | + $f = fopen( $this->fileCacheName(), "w" ); |
| | 122 | + if($f) { |
| | 123 | + $now = wfTimestampNow(); |
| | 124 | + if( $this->useGzip() ) { |
| | 125 | + $rawtext = str_replace( "</html>", |
| | 126 | + "<!-- Cached/compressed $now -->\n</html>", |
| | 127 | + $text ); |
| | 128 | + $text = gzencode( $rawtext ); |
| | 129 | + } else { |
| | 130 | + $text = str_replace( "</html>", |
| | 131 | + "<!-- Cached $now -->\n</html>", |
| | 132 | + $text ); |
| | 133 | + } |
| | 134 | + fwrite( $f, $text ); |
| | 135 | + fclose( $f ); |
| | 136 | + if( $this->useGzip() ) { |
| | 137 | + if( wfClientAcceptsGzip() ) { |
| | 138 | + header( "Content-Encoding: gzip" ); |
| | 139 | + return $text; |
| | 140 | + } else { |
| | 141 | + return $rawtext; |
| | 142 | + } |
| | 143 | + } else { |
| | 144 | + return $text; |
| | 145 | + } |
| | 146 | + } |
| | 147 | + return $text; |
| | 148 | + } |
| | 149 | + |
| | 150 | +} |
| | 151 | + |
| | 152 | +?> |
| Property changes on: branches/stable/phase3/includes/CacheManager.php |
| ___________________________________________________________________ |
| Name: svn:eol-style |
| 1 | 153 | + native |
| Name: svn:keywords |
| 2 | 154 | + Author Date Id Revision |