mMaxTitles = $wgMaxSquidPurgeTitles; } else { $this->mMaxTitles = $maxTitles; } if ( count( $urlArr ) > $this->mMaxTitles ) { $urlArr = array_slice( $urlArr, 0, $this->mMaxTitles ); } $this->urlArr = $urlArr; } /** * @param $title Title * * @return SquidUpdate */ static function newFromLinksTo( &$title ) { global $wgMaxSquidPurgeTitles; wfProfileIn( __METHOD__ ); # Get a list of URLs linking to this page $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 ) <= $wgMaxSquidPurgeTitles ) { foreach ( $res as $BL ) { $tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ; $blurlArr[] = $tobj->getInternalURL(); } } wfProfileOut( __METHOD__ ); return new SquidUpdate( $blurlArr ); } /** * Create a SquidUpdate from an array of Title objects, or a TitleArray object * * @param $titles array * @param $urlArr array * * @return SquidUpdate */ static function newFromTitles( $titles, $urlArr = array() ) { global $wgMaxSquidPurgeTitles; $i = 0; foreach ( $titles as $title ) { $urlArr[] = $title->getInternalURL(); if ( $i++ > $wgMaxSquidPurgeTitles ) { break; } } return new SquidUpdate( $urlArr ); } /** * @param $title Title * * @return SquidUpdate */ static function newSimplePurge( &$title ) { $urlArr = $title->getSquidURLs(); return new SquidUpdate( $urlArr ); } /** * Purges the list of URLs passed to the constructor */ function doUpdate() { SquidUpdate::purge( $this->urlArr ); } /** * Purges a list of Squids defined in $wgSquidServers. * $urlArr should contain the full URLs to purge as values * (example: $urlArr[] = 'http://my.host/something') * XXX report broken Squids per mail or log * * @param $urlArr array * @return void */ static function purge( $urlArr ) { global $wgSquidServers, $wgHTCPMulticastAddress, $wgHTCPPort; /*if ( (@$wgSquidServers[0]) == 'echo' ) { echo implode("
\n", $urlArr) . "
\n"; return; }*/ if( !$urlArr ) { return; } if ( $wgHTCPMulticastAddress && $wgHTCPPort ) { SquidUpdate::HTCPPurge( $urlArr ); } 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; } $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(); wfProfileOut( __METHOD__ ); } /** * @throws MWException * @param $urlArr array */ static function HTCPPurge( $urlArr ) { global $wgHTCPMulticastAddress, $wgHTCPMulticastTTL, $wgHTCPPort; wfProfileIn( __METHOD__ ); $htcpOpCLR = 4; // HTCP CLR // @todo 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__ ); } /** * 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. * * @param $url string * * @return string */ static function expand( $url ) { return wfExpandUrl( $url, PROTO_INTERNAL ); } }