+++ /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 ) {
- $fname = 'SquidUpdate::newFromLinksTo';
- wfProfileIn( $fname );
-
- # 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' ),
- $fname );
- $blurlArr = $title->getSquidURLs();
- if ( $dbr->numRows( $res ) <= $this->mMaxTitles ) {
- while ( $BL = $dbr->fetchObject ( $res ) )
- {
- $tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ;
- $blurlArr[] = $tobj->getInternalURL();
- }
- }
- $dbr->freeResult ( $res ) ;
-
- wfProfileOut( $fname );
- return new SquidUpdate( $blurlArr );
- }
-
- static function newFromTitles( &$titles, $urlArr = array() ) {
- global $wgMaxSquidPurgeTitles;
- if ( count( $titles ) > $wgMaxSquidPurgeTitles ) {
- $titles = array_slice( $titles, 0, $wgMaxSquidPurgeTitles );
- }
- foreach ( $titles as $title ) {
- $urlArr[] = $title->getInternalURL();
- }
- 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( empty( $urlArr ) ) {
- return;
- }
-
- if ( $wgHTCPMulticastAddress && $wgHTCPPort ) {
- return SquidUpdate::HTCPPurge( $urlArr );
- }
-
- $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 = SquidUpdate::expand( $urlArr[0] );
- unset($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;
- }
- $totalsockets = count($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");
- $error = $errstr = false;
- $socket = @fsockopen($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;
- $socket = @fsockopen($server, $port, $error, $errstr, 2);
- @stream_set_blocking($socket,false);
- $sockets[] = $socket;
- }
- $so++;
- }
- }
-
- if ($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));
- $url = SquidUpdate::expand( $urlArr[$urindex] );
- $msg = 'PURGE ' . $url . " HTTP/1.0\r\n".
- "Connection: Keep-Alive\r\n\r\n";
- #$this->debug($msg);
- @fputs($sockets[$s],$msg);
- #$this->debug("\n");
- }
- }
- }
- #$this->debug("Reading response...");
- foreach ($sockets as $socket) {
- $res = '';
- $esc = 0;
- while (strlen($res) < 100 && $esc < 200 ) {
- $res .= @fread($socket,1024);
- $esc++;
- usleep(20);
- }
-
- @fclose($socket);
- }
- #$this->debug("\n");
- wfProfileOut( $fname );
- }
-
- static function HTCPPurge( $urlArr ) {
- global $wgHTCPMulticastAddress, $wgHTCPMulticastTTL, $wgHTCPPort;
- $fname = 'SquidUpdate::HTCPPurge';
- wfProfileIn( $fname );
-
- $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( "SquidUpdate::HTCPPurge(): Error opening UDP socket: $errstr\n" );
- }
- wfProfileOut( $fname );
- }
-
- 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;
- }
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff