MediaWiki 1.7.1 wiederhergestellt

1 files changed, 159 insertions, 0 deletions

diff --git a/includes/CacheManager.php b/includes/CacheManager.php
new file mode 100644
index 00000000..b9e307f4
--- /dev/null
+++ b/includes/CacheManager.php
@@ -0,0 +1,159 @@
+<?php
+/**
+ * Contain the CacheManager class
+ * @package MediaWiki
+ * @subpackage Cache
+ */
+
+/**
+ * Handles talking to the file cache, putting stuff in and taking it back out.
+ * Mostly called from Article.php, also from DatabaseFunctions.php for the
+ * emergency abort/fallback to cache.
+ *
+ * Global options that affect this module:
+ * $wgCachePages
+ * $wgCacheEpoch
+ * $wgUseFileCache
+ * $wgFileCacheDirectory
+ * $wgUseGzip
+ * @package MediaWiki
+ */
+class CacheManager {
+	var $mTitle, $mFileCache;
+
+	function CacheManager( &$title ) {
+		$this->mTitle =& $title;
+		$this->mFileCache = '';
+	}
+
+	function fileCacheName() {
+		global $wgFileCacheDirectory;
+		if( !$this->mFileCache ) {
+			$key = $this->mTitle->getPrefixedDbkey();
+			$hash = md5( $key );
+			$key = str_replace( '.', '%2E', urlencode( $key ) );
+
+			$hash1 = substr( $hash, 0, 1 );
+			$hash2 = substr( $hash, 0, 2 );
+			$this->mFileCache = "{$wgFileCacheDirectory}/{$hash1}/{$hash2}/{$key}.html";
+
+			if($this->useGzip())
+				$this->mFileCache .= '.gz';
+
+			wfDebug( " fileCacheName() - {$this->mFileCache}\n" );
+		}
+		return $this->mFileCache;
+	}
+
+	function isFileCached() {
+		return file_exists( $this->fileCacheName() );
+	}
+
+	function fileCacheTime() {
+		return wfTimestamp( TS_MW, filemtime( $this->fileCacheName() ) );
+	}
+
+	function isFileCacheGood( $timestamp ) {
+		global $wgCacheEpoch;
+
+		if( !$this->isFileCached() ) return false;
+
+		$cachetime = $this->fileCacheTime();
+		$good = (( $timestamp <= $cachetime ) &&
+			 ( $wgCacheEpoch <= $cachetime ));
+
+		wfDebug(" isFileCacheGood() - cachetime $cachetime, touched {$timestamp} epoch {$wgCacheEpoch}, good $good\n");
+		return $good;
+	}
+
+	function useGzip() {
+		global $wgUseGzip;
+		return $wgUseGzip;
+	}
+
+	/* In handy string packages */
+	function fetchRawText() {
+		return file_get_contents( $this->fileCacheName() );
+	}
+
+	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 */
+	function loadFromFileCache() {
+		global $wgOut, $wgMimeType, $wgOutputEncoding, $wgContLanguageCode;
+		wfDebug(" loadFromFileCache()\n");
+
+		$filename=$this->fileCacheName();
+		$wgOut->sendCacheControl();
+
+		header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
+		header( "Content-language: $wgContLanguageCode" );
+
+		if( $this->useGzip() ) {
+			if( wfClientAcceptsGzip() ) {
+				header( 'Content-Encoding: gzip' );
+			} else {
+				/* Send uncompressed */
+				readgzfile( $filename );
+				return;
+			}
+		}
+		readfile( $filename );
+	}
+
+	function checkCacheDirs() {
+		$filename = $this->fileCacheName();
+		$mydir2=substr($filename,0,strrpos($filename,'/')); # subdirectory level 2
+		$mydir1=substr($mydir2,0,strrpos($mydir2,'/')); # subdirectory level 1
+
+		if(!file_exists($mydir1)) { mkdir($mydir1,0775); } # create if necessary
+		if(!file_exists($mydir2)) { mkdir($mydir2,0775); }
+	}
+
+	function saveToFileCache( $origtext ) {
+		$text = $origtext;
+		if(strcmp($text,'') == 0) return '';
+
+		wfDebug(" saveToFileCache()\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;
+	}
+
+}
+
+?>