X-Git-Url: http://git.cyclocoop.org/?a=blobdiff_plain;f=includes%2FSquidUpdate.php;h=31f7aa68b105f02dc7262c32444d7b6a8d1f2c8c;hb=c53ccc605f1128eefebda9378116fd18223b1ec2;hp=be25eda3cecb59df73e5dc425c64975a51864a6a;hpb=2ca258fd035e7da820747dc509d834c18aeba110;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/SquidUpdate.php b/includes/SquidUpdate.php
index be25eda3ce..31f7aa68b1 100644
--- a/includes/SquidUpdate.php
+++ b/includes/SquidUpdate.php
@@ -1,46 +1,73 @@
 <?php
-# See deferred.doc
+/**
+ * See deferred.txt
+ * @file
+ * @ingroup Cache
+ */
 
+/**
+ * Handles purging appropriate Squid URLs given a title (or titles)
+ * @ingroup Cache
+ */
 class SquidUpdate {
-	var $urlArr;
+	var $urlArr, $mMaxTitles;
 
-	function SquidUpdate( $urlArr = Array() ) {
+	function __construct( $urlArr = Array(), $maxTitles = false ) {
+		global $wgMaxSquidPurgeTitles;
+		if ( $maxTitles === false ) {
+			$this->mMaxTitles = $wgMaxSquidPurgeTitles;
+		} else {
+			$this->mMaxTitles = $maxTitles;
+		}
+		if ( count( $urlArr ) > $this->mMaxTitles ) {
+			$urlArr = array_slice( $urlArr, 0, $this->mMaxTitles );
+		}
 		$this->urlArr = $urlArr;
 	}
 
-	/* static */ function newFromLinksTo( &$title ) {
+	static function newFromLinksTo( &$title ) {
+		global $wgMaxSquidPurgeTitles;
+		wfProfileIn( __METHOD__ );
+
 		# Get a list of URLs linking to this page
-		$id = $title->getArticleID();
-		$sql = "SELECT cur_namespace,cur_title FROM links,cur WHERE l_to={$id} and l_from=cur_id" ;
-		$res = wfQuery ( $sql, DB_READ ) ;
+		$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();
-		while ( $BL = wfFetchObject ( $res ) )
-		{
-			$tobj = Title::makeTitle( $BL->cur_namespace, $BL->cur_title ) ; 
-			$blurlArr[] = $tobj->getInternalURL();
+		if ( $dbr->numRows( $res ) <= $wgMaxSquidPurgeTitles ) {
+			foreach ( $res as $BL ) {
+				$tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ;
+				$blurlArr[] = $tobj->getInternalURL();
+			}
 		}
-		wfFreeResult ( $res ) ;
+
+		wfProfileOut( __METHOD__ );
 		return new SquidUpdate( $blurlArr );
 	}
 
-	/* static */ function newFromBrokenLinksTo( &$title ) {
-		# Get a list of URLs linking to this (currently non-existent) page
-		$encTitle = $title->getPrefixedDBkey();
-		$sql = "SELECT cur_namespace,cur_title FROM brokenlinks,cur WHERE bl_to={$encTitle} AND bl_from=cur_id";
-		$res = wfQuery( $sql, DB_READ );
-		$blurlArr = array();
-		while ( $BL = wfFetchObject( $res ) )
-		{
-			$tobj = Title::makeTitle( $BL->cur_namespace, $BL->cur_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;
+			}
 		}
-		wfFreeResult( $res );
-		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() {
@@ -48,104 +75,128 @@ 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 ) {
-		global  $wgSquidServers;
+	static function purge( $urlArr ) {
+		global $wgSquidServers, $wgHTCPMulticastAddress, $wgHTCPPort;
 
-		if ( $wgSquidServers == "echo" ) {
-			echo implode("<br>\n", $urlArr);
+		/*if ( (@$wgSquidServers[0]) == 'echo' ) {
+			echo implode("<br />\n", $urlArr) . "<br />\n";
+			return;
+		}*/
+
+		if( !$urlArr ) {
 			return;
 		}
 
-		$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;
-					$socket = @fsockopen($server, $port, $error, $errstr, 3);
-					if (!$socket) {
-						$failed = true;
-						$totalsockets -= $sockspersq;
-					} else {
-						@fputs($socket,"PURGE " . $firsturl . " HTTP/1.0\r\n".
-						"Connection: Keep-Alive\r\n\r\n");
-						$res = @fread($socket,512);
-						/* 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 / $sockspersq));
-					@fputs($sockets[$s],"PURGE " . $urlArr[$urindex] . " HTTP/1.0\r\n".
-					"Connection: Keep-Alive\r\n\r\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 );
 			}
 		}
+		$pool->run();
 
-		foreach ($sockets as $socket) {
-			$res = '';
-			$esc = 0;
-			while (strlen($res) < 100 && $esc < 200  ) {
-				$res .= @fread($socket,1024);
-				$esc++;
-				usleep(20);
+		wfProfileOut( __METHOD__ );
+	}
+
+	static function HTCPPurge( $urlArr ) {
+		global $wgHTCPMulticastAddress, $wgHTCPMulticastTTL, $wgHTCPPort;
+		wfProfileIn( __METHOD__ );
+
+		$htcpOpCLR = 4;                 // HTCP CLR
+
+		// FIXME PHP doesn't support these socket constants (include/linux/in.h)
+		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 );
+		if ( $conn ) {
+			// Set socket options
+			socket_set_option( $conn, IPPROTO_IP, IP_MULTICAST_LOOP, 0 );
+			if ( $wgHTCPMulticastTTL != 1 )
+				socket_set_option( $conn, IPPROTO_IP, IP_MULTICAST_TTL,
+					$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, 'HEAD', strlen( $url ), $url,
+					8, 'HTTP/1.0', 0 );
+
+				$htcpDataLen = 8 + 2 + strlen( $htcpSpecifier );
+				$htcpLen = 4 + $htcpDataLen + 2;
+
+				// Note! Squid gets the bit order of the first
+				// word wrong, wrt the RFC. Apparently no other
+				// implementation exists, so adapt to Squid
+				$htcpPacket = pack( 'nxxnCxNxxa*n',
+					$htcpLen, $htcpDataLen, $htcpOpCLR,
+					$htcpTransID, $htcpSpecifier, 2);
+
+				// Send out
+				wfDebug( "Purging URL $url via HTCP\n" );
+				socket_sendto( $conn, $htcpPacket, $htcpLen, 0,
+					$wgHTCPMulticastAddress, $wgHTCPPort );
 			}
+		} else {
+			$errstr = socket_strerror( socket_last_error() );
+			wfDebug( __METHOD__ . "(): Error opening UDP socket: $errstr\n" );
+		}
+		wfProfileOut( __METHOD__ );
+	}
 
-			@fclose($socket);
+	/**
+	 * 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;
 	}
 }
-?>