From 71ffa3756a8214ac0ded721faa93ae6bbc886abd Mon Sep 17 00:00:00 2001
From: Domas Mituzas <midom@users.mediawiki.org>
Date: Sun, 28 May 2006 18:29:42 +0000
Subject: [PATCH] Allow storing local message cache as PHP source instead of
 serialized array, this way opcode cache is enjoyed :-) Might be not that
 secure, so disabled by default.

---
 includes/DefaultSettings.php |  6 +++
 includes/MessageCache.php    | 72 +++++++++++++++++++++++++++++++++---
 2 files changed, 72 insertions(+), 6 deletions(-)

diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index b9b1e10ecc..acfceac2bf 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -547,6 +547,12 @@ $wgMemCachedPersistent = false;
  * Directory for local copy of message cache, for use in addition to memcached
  */
 $wgLocalMessageCache = false;
+/**
+ * Defines format of local cache
+ * true - Serialized object
+ * false - PHP source file (Warning - security risk)
+ */
+$wgLocalMessageCacheSerialized = true;
 
 /**
  * Directory for compiled constant message array databases
diff --git a/includes/MessageCache.php b/includes/MessageCache.php
index ea7ae52e09..35ea4d53d5 100644
--- a/includes/MessageCache.php
+++ b/includes/MessageCache.php
@@ -113,6 +113,50 @@ class MessageCache {
 		@chmod( $filename, 0666 );
 	}
 
+	function loadFromScript( $hash ) {
+		global $wgLocalMessageCache, $wgDBname;
+		if ( $wgLocalMessageCache === false ) {
+			return;
+		}
+		
+		$filename = "$wgLocalMessageCache/messages-$wgDBname";
+		
+		wfSuppressWarnings();
+		$file = fopen( $filename, 'r' );
+		wfRestoreWarnings();
+		if ( !$file ) {
+			return;
+		}
+		$localHash=substr(fread($file,40),8);
+		fclose($file);
+		if ($hash!=$localHash) {
+			return;
+		}
+		require("$wgLocalMessageCache/messages-$wgDBname");
+	}
+	
+	function saveToScript($array, $hash) {
+		global $wgLocalMessageCache, $wgDBname;
+		if ( $wgLocalMessageCache === false ) {
+			return;
+		}
+
+		$filename = "$wgLocalMessageCache/messages-$wgDBname";
+		$oldUmask = umask( 0 );
+		wfMkdirParents( $wgLocalMessageCache, 0777 );
+		umask( $oldUmask );
+		$file = fopen( $filename.'.tmp', 'w');
+		fwrite($file,"<?php\n//$hash\n\n \$this->mCache = array(");
+		
+		$re="/(?<!\\\\)'/";
+		foreach ($array as $key => $message) {
+			fwrite($file, "'". preg_replace($re, "\'", $key).
+				"' => '" . preg_replace( $re, "\'", $message) . "',\n");
+		}
+		fwrite($file,");\n?>");
+		fclose($file);
+		rename($filename.'.tmp',$filename);
+	}
 
 	/**
 	 * Loads messages either from memcached or the database, if not disabled
@@ -120,7 +164,7 @@ class MessageCache {
 	 * Returns false for a reportable error, true otherwise
 	 */
 	function load() {
-		global $wgLocalMessageCache;
+		global $wgLocalMessageCache, $wgLocalMessageCacheSerialized;
 
 		if ( $this->mDisable ) {
 			static $shownDisabled = false;
@@ -141,7 +185,11 @@ class MessageCache {
 			wfProfileIn( $fname.'-fromlocal' );
 			$hash = $this->mMemc->get( "{$this->mMemcKey}-hash" );
 			if ( $hash ) {
-				$this->loadFromLocal( $hash );
+				if ($wgLocalMessageCacheSerialized) {
+					$this->loadFromLocal( $hash );
+				} else {
+					$this->loadFromScript( $hash );
+				}
 			}
 			wfProfileOut( $fname.'-fromlocal' );
 
@@ -157,7 +205,11 @@ class MessageCache {
 						$hash = md5( $serialized );
 						$this->mMemc->set( "{$this->mMemcKey}-hash", $hash, $this->mExpiry );
 					}
-					$this->saveToLocal( $serialized, $hash );
+					if ($wgLocalMessageCacheSerialized) {
+						$this->saveToLocal( $serialized,$hash );
+					} else {
+						$this->saveToScript( $this->mCache, $hash );
+					}
 				}
 				wfProfileOut( $fname.'-fromcache' );
 			}
@@ -188,7 +240,11 @@ class MessageCache {
 						$serialized = serialize( $this->mCache );
 						$hash = md5( $serialized );
 						$this->mMemc->set( "{$this->mMemcKey}-hash", $hash, $this->mExpiry );
-						$this->saveToLocal( $serialized, $hash );
+						if ($wgLocalMessageCacheSerialized) {
+							$this->saveToLocal( $serialized,$hash );
+						} else {
+							$this->saveToScript( $this->mCache, $hash );
+						}
 					}
 
 					wfProfileOut( $fname.'-save' );
@@ -289,7 +345,7 @@ class MessageCache {
 	}
 
 	function replace( $title, $text ) {
-		global $wgLocalMessageCache, $parserMemc, $wgDBname;
+		global $wgLocalMessageCache, $wgLocalMessageCacheSerialized, $parserMemc, $wgDBname;
 
 		$this->lock();
 		$this->load();
@@ -303,7 +359,11 @@ class MessageCache {
 				$serialized = serialize( $this->mCache );
 				$hash = md5( $serialized );
 				$this->mMemc->set( "{$this->mMemcKey}-hash", $hash, $this->mExpiry );
-				$this->saveToLocal( $serialized, $hash );
+				if ($wgLocalMessageCacheSerialized) {
+					$this->saveToLocal( $serialized,$hash );
+				} else {
+					$this->saveToScript( $this->mCache, $hash );
+				}
 			}
 
 
-- 
2.20.1