1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
<?php
/**
* See deferred.doc
* @package MediaWiki
*/
/**
*
* @package MediaWiki
*/
class SquidUpdate {
var $urlArr, $mMaxTitles;
function SquidUpdate( $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
$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 ) ;
$blurlArr = $title->getSquidURLs();
if ( $dbr->numRows( $res ) <= $this->mMaxTitles ) {
while ( $BL = $dbr->fetchObject ( $res ) )
{
$tobj = Title::makeTitle( $BL->cur_namespace, $BL->cur_title ) ;
$blurlArr[] = $tobj->getInternalURL();
}
}
$dbr->freeResult ( $res ) ;
wfProfileOut( $fname );
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();
}
}
$dbr->freeResult( $res );
wfProfileOut( $fname );
return new SquidUpdate( $blurlArr );
}
/* static */ function newSimplePurge( &$title ) {
$urlArr = $title->getSquidURLs();
return new SquidUpdate( $blurlArr );
}
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;
if ( $wgSquidServers == 'echo' ) {
echo implode("<br>\n", $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;
}
$totalsockets = count($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);
}
$so++;
}
}
if ($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");
}
}
}
#$this->debug("Reading response...");
foreach ($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 );
}
function debug( $text ) {
global $wgDebugSquid;
if ( $wgDebugSquid ) {
wfDebug( $text );
}
}
}
?>
|
