<?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, $mMaxTitles;
- function SquidUpdate( $title, $urlArr = Array() )
- {
- $this->title = $title;
+ 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__ );
- function doUpdate()
- {
- if (count( $this->urlArr ) == 0) { // newly created Article
- global $wgInternalServer;
- /* prepare the list of urls to purge */
- $id= $this->title->getArticleID();
- $sql = "SELECT l_from FROM links WHERE l_to={$id}" ;
- $res = wfQuery ( $sql, DB_READ ) ;
- while ( $BL = wfFetchObject ( $res ) )
+ # 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 ) {
+ while ( $BL = $dbr->fetchObject ( $res ) )
{
- $t = Title::newFromDBkey( $BL->l_from) ;
- $this->urlArr[] = $wgInternalServer.$t->getLocalURL() ;
+ $tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ;
+ $blurlArr[] = $tobj->getInternalURL();
}
- wfFreeResult ( $res ) ;
+ }
+ 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( $urlArr );
+ }
- wfPurgeSquidServers($this->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;
+ }
+}
dépôts / lhc / web / wiklou.git / blobdiff