151 lines
4.4 KiB
PHP
151 lines
4.4 KiB
PHP
<?php
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# See deferred.doc
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class SquidUpdate {
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var $urlArr;
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function SquidUpdate( $urlArr = Array() ) {
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$this->urlArr = $urlArr;
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}
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/* static */ function newFromLinksTo( &$title ) {
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# Get a list of URLs linking to this page
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$id = $title->getArticleID();
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$sql = "SELECT cur_namespace,cur_title FROM links,cur WHERE l_to={$id} and l_from=cur_id" ;
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$res = wfQuery ( $sql, DB_READ ) ;
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$blurlArr = $title->getSquidURLs();
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while ( $BL = wfFetchObject ( $res ) )
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{
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$tobj = Title::makeTitle( $BL->cur_namespace, $BL->cur_title ) ;
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$blurlArr[] = $tobj->getInternalURL();
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}
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wfFreeResult ( $res ) ;
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return new SquidUpdate( $blurlArr );
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}
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/* static */ function newFromBrokenLinksTo( &$title ) {
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# Get a list of URLs linking to this (currently non-existent) page
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$encTitle = $title->getPrefixedDBkey();
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$sql = "SELECT cur_namespace,cur_title FROM brokenlinks,cur WHERE bl_to={$encTitle} AND bl_from=cur_id";
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$res = wfQuery( $sql, DB_READ );
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$blurlArr = array();
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while ( $BL = wfFetchObject( $res ) )
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{
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$tobj = Title::makeTitle( $BL->cur_namespace, $BL->cur_title );
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$blurlArr[] = $tobj->getInternalURL();
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}
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wfFreeResult( $res );
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return new SquidUpdate( $blurlArr );
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}
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/* static */ function newSimplePurge( &$title ) {
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$urlArr = $title->getSquidURLs();
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return new SquidUpdate( $blurlArr );
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}
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function doUpdate() {
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SquidUpdate::purge( $this->urlArr );
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}
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/* Purges a list of Squids defined in $wgSquidServers.
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$urlArr should contain the full URLs to purge as values
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(example: $urlArr[] = 'http://my.host/something')
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XXX report broken Squids per mail or log */
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/* static */ function purge( $urlArr ) {
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global $wgSquidServers;
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if ( $wgSquidServers == "echo" ) {
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echo implode("<br>\n", $urlArr);
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return;
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}
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$maxsocketspersquid = 8; // socket cap per Squid
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$urlspersocket = 400; // 400 seems to be a good tradeoff, opening a socket takes a while
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$firsturl = $urlArr[0];
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unset($urlArr[0]);
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$urlArr = array_values($urlArr);
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$sockspersq = max(ceil(count($urlArr) / $urlspersocket ),1);
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if ($sockspersq == 1) {
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/* the most common case */
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$urlspersocket = count($urlArr);
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} else if ($sockspersq > $maxsocketspersquid ) {
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$urlspersocket = ceil(count($urlArr) / $maxsocketspersquid);
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$sockspersq = $maxsocketspersquid;
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}
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$totalsockets = count($wgSquidServers) * $sockspersq;
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$sockets = Array();
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/* this sets up the sockets and tests the first socket for each server. */
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for ($ss=0;$ss < count($wgSquidServers);$ss++) {
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$failed = false;
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$so = 0;
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while ($so < $sockspersq && !$failed) {
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if ($so == 0) {
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/* first socket for this server, do the tests */
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@list($server, $port) = explode(':', $wgSquidServers[$ss]);
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if(!isset($port)) $port = 80;
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$socket = @fsockopen($server, $port, $error, $errstr, 3);
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if (!$socket) {
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$failed = true;
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$totalsockets -= $sockspersq;
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} else {
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@fputs($socket,"PURGE " . $firsturl . " HTTP/1.0\r\n".
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"Connection: Keep-Alive\r\n\r\n");
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$res = @fread($socket,512);
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/* Squid only returns http headers with 200 or 404 status,
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if there's more returned something's wrong */
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if (strlen($res) > 250) {
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fclose($socket);
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$failed = true;
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$totalsockets -= $sockspersq;
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} else {
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@stream_set_blocking($socket,false);
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$sockets[] = $socket;
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}
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}
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} else {
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/* open the remaining sockets for this server */
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list($server, $port) = explode(':', $wgSquidServers[$ss]);
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if(!isset($port)) $port = 80;
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$sockets[] = @fsockopen($server, $port, $error, $errstr, 2);
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@stream_set_blocking($sockets[$s],false);
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}
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$so++;
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}
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}
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if ($urlspersocket > 0) {
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/* now do the heavy lifting. The fread() relies on Squid returning only the headers */
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for ($r=0;$r < $urlspersocket;$r++) {
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for ($s=0;$s < $totalsockets;$s++) {
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if($r != 0) {
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$res = '';
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$esc = 0;
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while (strlen($res) < 100 && $esc < 200 ) {
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$res .= @fread($sockets[$s],512);
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$esc++;
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usleep(20);
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}
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}
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$urindex = $r + $urlspersocket * ($s - $sockspersq * floor($s / $sockspersq));
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@fputs($sockets[$s],"PURGE " . $urlArr[$urindex] . " HTTP/1.0\r\n".
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"Connection: Keep-Alive\r\n\r\n");
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}
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}
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}
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foreach ($sockets as $socket) {
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$res = '';
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$esc = 0;
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while (strlen($res) < 100 && $esc < 200 ) {
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$res .= @fread($socket,1024);
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$esc++;
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usleep(20);
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}
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@fclose($socket);
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}
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}
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}
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?>
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