X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2FSquidUpdate.php;h=31f7aa68b105f02dc7262c32444d7b6a8d1f2c8c;hb=8619dc76b79e740ac29f267a58033d8bd9fc1432;hp=27ee985a3b554aeec6fd840104480aefd1a0bd9b;hpb=59c6e92429c1c42c6e06d60e85766901810b338e;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/SquidUpdate.php b/includes/SquidUpdate.php
index 27ee985a3b..31f7aa68b1 100644
--- a/includes/SquidUpdate.php
+++ b/includes/SquidUpdate.php
@@ -1,31 +1,202 @@
 <?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 $title, $urlArr;
-	
-	function SquidUpdate( $title, $urlArr = Array() ) {
-		$this->title = $title;
+	var $urlArr, $mMaxTitles;
+
+	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 ) {
+		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
+	 */
+	static function newFromTitles( $titles, $urlArr = array() ) {
+		global $wgMaxSquidPurgeTitles;
+		$i = 0;
+		foreach ( $titles as $title ) {
+			$urlArr[] = $title->getInternalURL();
+			if ( $i++ > $wgMaxSquidPurgeTitles ) {
+				break;
+			}
+		}
+		return new SquidUpdate( $urlArr );
+	}
+
+	static function newSimplePurge( &$title ) {
+		$urlArr = $title->getSquidURLs();
+		return new SquidUpdate( $urlArr );
+	}
 
 	function doUpdate() {
-		if( count( $this->urlArr ) == 0) {
-			# newly created Article
-			# prepare the list of urls to purge
-			$id= $this->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 );
-			while( $row = wfFetchObject ( $res ) ) {
-				$t = Title::MakeTitle( $row->cur_namespace, $row->cur_title );
-				$this->urlArr[] = $t->getInternalURL();
+		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 */
+
+	static function purge( $urlArr ) {
+		global $wgSquidServers, $wgHTCPMulticastAddress, $wgHTCPPort;
+
+		/*if ( (@$wgSquidServers[0]) == 'echo' ) {
+			echo implode("<br />\n", $urlArr) . "<br />\n";
+			return;
+		}*/
+
+		if( !$urlArr ) {
+			return;
+		}
+
+		if ( $wgHTCPMulticastAddress && $wgHTCPPort ) {
+			return 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 );
 			}
-			wfFreeResult( $res );
 		}
+		$pool->run();
 
-		wfPurgeSquidServers( $this->urlArr );
+		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__ );
+	}
+
+	/**
+	 * 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;
+	}
+}