<?php
/**
- * See deferred.doc
- * @package MediaWiki
+ * See deferred.txt
+ * @file
+ * @ingroup Cache
*/
/**
- *
- * @package MediaWiki
+ * Handles purging appropriate Squid URLs given a title (or titles)
+ * @ingroup Cache
*/
class SquidUpdate {
var $urlArr, $mMaxTitles;
- function SquidUpdate( $urlArr = Array(), $maxTitles = false ) {
+ function __construct( $urlArr = Array(), $maxTitles = false ) {
global $wgMaxSquidPurgeTitles;
if ( $maxTitles === false ) {
$this->mMaxTitles = $wgMaxSquidPurgeTitles;
$this->urlArr = $urlArr;
}
- /* static */ function newFromLinksTo( &$title ) {
- $fname = 'SquidUpdate::newFromLinksTo';
- wfProfileIn( $fname );
+ static function newFromLinksTo( &$title ) {
+ global $wgMaxSquidPurgeTitles;
+ wfProfileIn( __METHOD__ );
# Get a list of URLs linking to this page
- $id = $title->getArticleID();
-
- $dbr =& wfGetDB( DB_SLAVE );
- $links = $dbr->tableName( 'links' );
- $cur = $dbr->tableName( 'cur' );
-
- $sql = "SELECT cur_namespace,cur_title FROM $links,$cur WHERE l_to={$id} and l_from=cur_id" ;
- $res = $dbr->query( $sql, $fname ) ;
+ $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 ) <= $this->mMaxTitles ) {
+ if ( $dbr->numRows( $res ) <= $wgMaxSquidPurgeTitles ) {
while ( $BL = $dbr->fetchObject ( $res ) )
{
- $tobj = Title::makeTitle( $BL->cur_namespace, $BL->cur_title ) ;
+ $tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ;
$blurlArr[] = $tobj->getInternalURL();
}
}
- $dbr->freeResult ( $res ) ;
- wfProfileOut( $fname );
+ wfProfileOut( __METHOD__ );
return new SquidUpdate( $blurlArr );
}
- /* static */ function newFromBrokenLinksTo( &$title ) {
- $fname = 'SquidUpdate::newFromBrokenLinksTo';
- wfProfileIn( $fname );
-
- # Get a list of URLs linking to this (currently non-existent) page
- $dbr =& wfGetDB( DB_SLAVE );
- $brokenlinks = $dbr->tableName( 'brokenlinks' );
- $cur = $dbr->tableName( 'cur' );
- $encTitle = $dbr->addQuotes( $title->getPrefixedDBkey() );
-
- $sql = "SELECT cur_namespace,cur_title FROM $brokenlinks,$cur WHERE bl_to={$encTitle} AND bl_from=cur_id";
- $res = $dbr->query( $sql, $fname );
- $blurlArr = array();
- if ( $dbr->numRows( $res ) <= $this->mMaxTitles ) {
- while ( $BL = $dbr->fetchObject( $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;
}
}
- $dbr->freeResult( $res );
- wfProfileOut( $fname );
- 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() {
}
/* 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[0]) == 'echo' ) {
+ echo implode("<br />\n", $urlArr) . "<br />\n";
+ return;
+ }*/
- if ( $wgSquidServers == 'echo' ) {
- echo implode("<br>\n", $urlArr);
+ if( !$urlArr ) {
return;
}
- $fname = 'SquidUpdate::purge';
- wfProfileIn( $fname );
-
- $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)) $port = 80;
- #$this->debug("Opening socket to $server:$port");
- $socket = @fsockopen($server, $port, $error, $errstr, 3);
- #$this->debug("\n");
- if (!$socket) {
- $failed = true;
- $totalsockets -= $sockspersq;
- } else {
- $msg = 'PURGE ' . $firsturl . " HTTP/1.0\r\n".
- "Connection: Keep-Alive\r\n\r\n";
- #$this->debug($msg);
- @fputs($socket,$msg);
- #$this->debug("...");
- $res = @fread($socket,512);
- #$this->debug("\n");
- /* Squid only returns http headers with 200 or 404 status,
- if there's more returned something's wrong */
- if (strlen($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));
- $msg = 'PURGE ' . $urlArr[$urindex] . " HTTP/1.0\r\n".
- "Connection: Keep-Alive\r\n\r\n";
- #$this->debug($msg);
- @fputs($sockets[$s],$msg);
- #$this->debug("\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( $client );
}
}
- #$this->debug("Reading response...");
- foreach ($sockets as $socket) {
- $res = '';
- $esc = 0;
- while (strlen($res) < 100 && $esc < 200 ) {
- $res .= @fread($socket,1024);
- $esc++;
- usleep(20);
- }
+ $pool->run();
+
+ wfProfileOut( __METHOD__ );
+ }
+
+ static function HTCPPurge( $urlArr ) {
+ global $wgHTCPMulticastAddress, $wgHTCPMulticastTTL, $wgHTCPPort;
+ wfProfileIn( __METHOD__ );
- @fclose($socket);
+ $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: $errstr\n" );
}
- #$this->debug("\n");
- wfProfileOut( $fname );
+ wfProfileOut( __METHOD__ );
}
- function debug( $text ) {
- global $wgDebugSquid;
- if ( $wgDebugSquid ) {
- wfDebug( $text );
+ /**
+ * 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