X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2FSquidUpdate.php;h=31f7aa68b105f02dc7262c32444d7b6a8d1f2c8c;hb=3da8358022e7251ec927ff5e3e1d79273c6d29c1;hp=0bcb61faafbbbfba6af7e6a0a28520e86cedac3a;hpb=76bb2dbc40507651a7c01f449ed68c10e7482654;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/SquidUpdate.php b/includes/SquidUpdate.php
index 0bcb61faaf..31f7aa68b1 100644
--- a/includes/SquidUpdate.php
+++ b/includes/SquidUpdate.php
@@ -1,17 +1,18 @@
 <?php
 /**
  * See deferred.txt
- * @package MediaWiki
+ * @file
+ * @ingroup Cache
  */
 
 /**
- *
- * @package MediaWiki
+ * Handles purging appropriate Squid URLs given a title (or titles)
+ * @ingroup Cache
  */
 class SquidUpdate {
 	var $urlArr, $mMaxTitles;
 
-	function SquidUpdate( $urlArr = Array(), $maxTitles = false ) {
+	function __construct( $urlArr = Array(), $maxTitles = false ) {
 		global $wgMaxSquidPurgeTitles;
 		if ( $maxTitles === false ) {
 			$this->mMaxTitles = $wgMaxSquidPurgeTitles;
@@ -24,61 +25,49 @@ class SquidUpdate {
 		$this->urlArr = $urlArr;
 	}
 
-	/* static */ function newFromLinksTo( &$title ) {
-		$fname = 'SquidUpdate::newFromLinksTo';
-		wfProfileIn( $fname );
+	static function newFromLinksTo( &$title ) {
+		global $wgMaxSquidPurgeTitles;
+		wfProfileIn( __METHOD__ );
 
 		# Get a list of URLs linking to this page
-		$id = $title->getArticleID();
-
-		$dbr =& wfGetDB( DB_SLAVE );
-		$links = $dbr->tableName( 'links' );
-		$page = $dbr->tableName( 'page' );
-
-		$sql = "SELECT page_namespace,page_title FROM $links,$page WHERE l_to={$id} and l_from=page_id" ;
-		$res = $dbr->query( $sql, $fname ) ;
+		$dbr = wfGetDB( DB_SLAVE );
+		$res = $dbr->select( array( 'links', 'page' ),
+			array( 'page_namespace', 'page_title' ),
+			array(
+				'pl_namespace' => $title->getNamespace(),
+				'pl_title'     => $title->getDBkey(),
+				'pl_from=page_id' ),
+			__METHOD__ );
 		$blurlArr = $title->getSquidURLs();
-		if ( $dbr->numRows( $res ) <= $this->mMaxTitles ) {
-			while ( $BL = $dbr->fetchObject ( $res ) )
-			{
-				$tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ; 
+		if ( $dbr->numRows( $res ) <= $wgMaxSquidPurgeTitles ) {
+			foreach ( $res as $BL ) {
+				$tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ;
 				$blurlArr[] = $tobj->getInternalURL();
 			}
 		}
-		$dbr->freeResult ( $res ) ;
 
-		wfProfileOut( $fname );
+		wfProfileOut( __METHOD__ );
 		return new SquidUpdate( $blurlArr );
 	}
 
-	/* static */ function newFromBrokenLinksTo( &$title ) {
-		$fname = 'SquidUpdate::newFromBrokenLinksTo';
-		wfProfileIn( $fname );
-
-		# Get a list of URLs linking to this (currently non-existent) page
-		$dbr =& wfGetDB( DB_SLAVE );
-		$brokenlinks = $dbr->tableName( 'brokenlinks' );
-		$page = $dbr->tableName( 'page' );
-		$encTitle = $dbr->addQuotes( $title->getPrefixedDBkey() );
-
-		$sql = "SELECT page_namespace,page_title FROM $brokenlinks,$cur WHERE bl_to={$encTitle} AND bl_from=page_id";
-		$res = $dbr->query( $sql, $fname );
-		$blurlArr = array();
-		if ( $dbr->numRows( $res ) <= $this->mMaxTitles ) {
-			while ( $BL = $dbr->fetchObject( $res ) )
-			{
-				$tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title );
-				$blurlArr[] = $tobj->getInternalURL();
+	/**
+	 * Create a SquidUpdate from an array of Title objects, or a TitleArray object
+	 */
+	static function newFromTitles( $titles, $urlArr = array() ) {
+		global $wgMaxSquidPurgeTitles;
+		$i = 0;
+		foreach ( $titles as $title ) {
+			$urlArr[] = $title->getInternalURL();
+			if ( $i++ > $wgMaxSquidPurgeTitles ) {
+				break;
 			}
 		}
-		$dbr->freeResult( $res );
-		wfProfileOut( $fname );
-		return new SquidUpdate( $blurlArr );
+		return new SquidUpdate( $urlArr );
 	}
 
-	/* static */ function newSimplePurge( &$title ) {
+	static function newSimplePurge( &$title ) {
 		$urlArr = $title->getSquidURLs();
-		return new SquidUpdate( $blurlArr );
+		return new SquidUpdate( $urlArr );
 	}
 
 	function doUpdate() {
@@ -86,137 +75,66 @@ class SquidUpdate {
 	}
 
 	/* Purges a list of Squids defined in $wgSquidServers.
-	$urlArr should contain the full URLs to purge as values 
+	$urlArr should contain the full URLs to purge as values
 	(example: $urlArr[] = 'http://my.host/something')
 	XXX report broken Squids per mail or log */
 
-	/* static */ function purge( $urlArr ) {
+	static function purge( $urlArr ) {
 		global $wgSquidServers, $wgHTCPMulticastAddress, $wgHTCPPort;
 
-		if ( $wgSquidServers == 'echo' ) {
-			echo implode("<br />\n", $urlArr);
+		/*if ( (@$wgSquidServers[0]) == 'echo' ) {
+			echo implode("<br />\n", $urlArr) . "<br />\n";
 			return;
-		}
+		}*/
 
-		if ( $wgHTCPMulticastAddress && $wgHTCPPort )
-			SquidUpdate::HTCPPurge( $urlArr );
+		if( !$urlArr ) {
+			return;
+		}
 
-		$fname = 'SquidUpdate::purge';
-		wfProfileIn( $fname );
-		
-		$maxsocketspersquid = 8; //  socket cap per Squid
-		$urlspersocket = 400; // 400 seems to be a good tradeoff, opening a socket takes a while
-		$firsturl = $urlArr[0];
-		unset($urlArr[0]);
-		$urlArr = array_values($urlArr);
-		$sockspersq =  max(ceil(count($urlArr) / $urlspersocket ),1);
-		if ($sockspersq == 1) {
-			/* the most common case */
-			$urlspersocket = count($urlArr);
-		} else if ($sockspersq > $maxsocketspersquid ) {
-			$urlspersocket = ceil(count($urlArr) / $maxsocketspersquid);
-			$sockspersq = $maxsocketspersquid;
+		if ( $wgHTCPMulticastAddress && $wgHTCPPort ) {
+			return SquidUpdate::HTCPPurge( $urlArr );
 		}
-		$totalsockets = count($wgSquidServers) * $sockspersq;
-		$sockets = Array();
 
-		/* this sets up the sockets and tests the first socket for each server. */
-		for ($ss=0;$ss < count($wgSquidServers);$ss++) {
-			$failed = false;
-			$so = 0;
-			while ($so < $sockspersq && !$failed) {
-				if ($so == 0) {
-					/* first socket for this server, do the tests */
-					@list($server, $port) = explode(':', $wgSquidServers[$ss]);
-					if(!isset($port)) $port = 80;
-					#$this->debug("Opening socket to $server:$port");
-					$socket = @fsockopen($server, $port, $error, $errstr, 3);
-					#$this->debug("\n");
-					if (!$socket) {
-						$failed = true;
-						$totalsockets -= $sockspersq;
-					} else {
-						$msg = 'PURGE ' . $firsturl . " HTTP/1.0\r\n".
-						"Connection: Keep-Alive\r\n\r\n";
-						#$this->debug($msg);
-						@fputs($socket,$msg);
-						#$this->debug("...");
-						$res = @fread($socket,512);
-						#$this->debug("\n");
-						/* Squid only returns http headers with 200 or 404 status, 
-						if there's more returned something's wrong */
-						if (strlen($res) > 250) {
-							fclose($socket);
-							$failed = true;
-							$totalsockets -= $sockspersq;
-						} else {
-							@stream_set_blocking($socket,false);
-							$sockets[] = $socket;
-						}
-					} 
-				} else {
-					/* open the remaining sockets for this server */
-					list($server, $port) = explode(':', $wgSquidServers[$ss]);
-					if(!isset($port)) $port = 80;
-					$sockets[] = @fsockopen($server, $port, $error, $errstr, 2);
-					@stream_set_blocking($sockets[$s],false);
-				}
-				$so++;
-			}
+		wfProfileIn( __METHOD__ );
+
+		$maxSocketsPerSquid = 8; //  socket cap per Squid
+		$urlsPerSocket = 400; // 400 seems to be a good tradeoff, opening a socket takes a while
+		$socketsPerSquid = ceil( count( $urlArr ) / $urlsPerSocket );
+		if ( $socketsPerSquid > $maxSocketsPerSquid ) {
+			$socketsPerSquid = $maxSocketsPerSquid;
 		}
 
-		if ($urlspersocket > 0) {
-			/* now do the heavy lifting. The fread() relies on Squid returning only the headers */
-			for ($r=0;$r < $urlspersocket;$r++) {
-				for ($s=0;$s < $totalsockets;$s++) {
-					if($r != 0) {
-						$res = '';
-						$esc = 0;
-						while (strlen($res) < 100 && $esc < 200  ) {
-							$res .= @fread($sockets[$s],512);
-							$esc++;
-							usleep(20);
-						}
-					}
-					$urindex = $r + $urlspersocket * ($s - $sockspersq * floor($s / $sockspersq));
-					$msg = 'PURGE ' . $urlArr[$urindex] . " HTTP/1.0\r\n".
-					"Connection: Keep-Alive\r\n\r\n";
-					#$this->debug($msg);
-					@fputs($sockets[$s],$msg);
-					#$this->debug("\n");
+		$pool = new SquidPurgeClientPool;
+		$chunks = array_chunk( $urlArr, ceil( count( $urlArr ) / $socketsPerSquid ) );
+		foreach ( $wgSquidServers as $server ) {
+			foreach ( $chunks as $chunk ) {
+				$client = new SquidPurgeClient( $server );
+				foreach ( $chunk as $url ) {
+					$client->queuePurge( $url );
 				}
+				$pool->addClient( $client );
 			}
 		}
-		#$this->debug("Reading response...");
-		foreach ($sockets as $socket) {
-			$res = '';
-			$esc = 0;
-			while (strlen($res) < 100 && $esc < 200  ) {
-				$res .= @fread($socket,1024);
-				$esc++;
-				usleep(20);
-			}
+		$pool->run();
 
-			@fclose($socket);
-		}
-		#$this->debug("\n");
-		wfProfileOut( $fname );
+		wfProfileOut( __METHOD__ );
 	}
 
-	/* static */ function HTCPPurge( $urlArr ) {
+	static function HTCPPurge( $urlArr ) {
 		global $wgHTCPMulticastAddress, $wgHTCPMulticastTTL, $wgHTCPPort;
-		$fname = 'SquidUpdate::HTCPPurge';
-		wfProfileIn( $fname );
+		wfProfileIn( __METHOD__ );
 
 		$htcpOpCLR = 4;                 // HTCP CLR
 
 		// FIXME PHP doesn't support these socket constants (include/linux/in.h)
-		define( "IPPROTO_IP", 0 );
-		define( "IP_MULTICAST_LOOP", 34 );
-		define( "IP_MULTICAST_TTL", 33 );
+		if( !defined( "IPPROTO_IP" ) ) {
+			define( "IPPROTO_IP", 0 );
+			define( "IP_MULTICAST_LOOP", 34 );
+			define( "IP_MULTICAST_TTL", 33 );
+		}
 
 		// pfsockopen doesn't work because we need set_sock_opt
-	        $conn = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP );
+		$conn = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP );
 		if ( $conn ) {
 			// Set socket options
 			socket_set_option( $conn, IPPROTO_IP, IP_MULTICAST_LOOP, 0 );
@@ -225,13 +143,18 @@ class SquidUpdate {
 					$wgHTCPMulticastTTL );
 
 			foreach ( $urlArr as $url ) {
+				if( !is_string( $url ) ) {
+					throw new MWException( 'Bad purge URL' );
+				}
+				$url = SquidUpdate::expand( $url );
+
 				// Construct a minimal HTCP request diagram
 				// as per RFC 2756
 				// Opcode 'CLR', no response desired, no auth
 				$htcpTransID = rand();
 
 				$htcpSpecifier = pack( 'na4na*na8n',
-					4, 'NONE', strlen( $url ), $url,
+					4, 'HEAD', strlen( $url ), $url,
 					8, 'HTTP/1.0', 0 );
 
 				$htcpDataLen = 8 + 2 + strlen( $htcpSpecifier );
@@ -251,16 +174,29 @@ class SquidUpdate {
 			}
 		} else {
 			$errstr = socket_strerror( socket_last_error() );
-			wfDebug( "SquidUpdate::HTCPPurge(): Error opening UDP socket: $errstr\n" );
+			wfDebug( __METHOD__ . "(): Error opening UDP socket: $errstr\n" );
 		}
-		wfProfileOut( $fname );
+		wfProfileOut( __METHOD__ );
 	}
 
-	function debug( $text ) {
-		global $wgDebugSquid;
-		if ( $wgDebugSquid ) {
-			wfDebug( $text );
+	/**
+	 * Expand local URLs to fully-qualified URLs using the internal protocol
+	 * and host defined in $wgInternalServer. Input that's already fully-
+	 * qualified will be passed through unchanged.
+	 *
+	 * This is used to generate purge URLs that may be either local to the
+	 * main wiki or include a non-native host, such as images hosted on a
+	 * second internal server.
+	 *
+	 * Client functions should not need to call this.
+	 *
+	 * @return string
+	 */
+	static function expand( $url ) {
+		global $wgInternalServer;
+		if( $url != '' && $url{0} == '/' ) {
+			return $wgInternalServer . $url;
 		}
+		return $url;
 	}
 }
-?>