+++ /dev/null
-<?php
-/**
- * See deferred.txt
- * @file
- * @ingroup Cache
- */
-
-/**
- * Handles purging appropriate Squid URLs given a title (or titles)
- * @ingroup Cache
- */
-class SquidUpdate {
- 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() {
- 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 );
- }
- }
- $pool->run();
-
- 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;
- }
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff