From: Aaron Schulz <aaron@users.mediawiki.org>
Date: Mon, 26 Sep 2011 03:37:20 +0000 (+0000)
Subject: Cache negative results for interwiki prefix checks. Also helps filecache fail-over... 
X-Git-Tag: 1.31.0-rc.0~27422
X-Git-Url: https://git.cyclocoop.org/%7B%24admin_url%7Dmembres/modifier.php?a=commitdiff_plain;h=8ecde9b038143ff8370965c8ff8908097737f7d8;p=lhc%2Fweb%2Fwiklou.git

Cache negative results for interwiki prefix checks. Also helps filecache fail-over mode if DB is down.
---

diff --git a/includes/interwiki/Interwiki.php b/includes/interwiki/Interwiki.php
index ac9bee7657..f19919fbc2 100644
--- a/includes/interwiki/Interwiki.php
+++ b/includes/interwiki/Interwiki.php
@@ -151,6 +151,9 @@ class Interwiki {
 		if ( !$iwData ) {
 			$key = wfMemcKey( 'interwiki', $prefix );
 			$iwData = $wgMemc->get( $key );
+			if ( $iwData === '!EMPTY' ) {
+				return false; // negative cache hit
+			}
 		}
 
 		if( $iwData && is_array( $iwData ) ) { // is_array is hack for old keys
@@ -175,6 +178,8 @@ class Interwiki {
 			);
 			$wgMemc->add( $key, $mc, $wgInterwikiExpiry );
 			return $iw;
+		} else {
+			$wgMemc->add( $key, '!EMPTY', $wgInterwikiExpiry ); // negative cache hit
 		}
 
 		return false;