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
|
<?php
if ( !defined( 'MEDIAWIKI' ) ) {
exit;
}
class SpamBlacklist extends BaseBlacklist {
/**
* Returns the code for the blacklist implementation
*
* @return string
*/
protected function getBlacklistType() {
return 'spam';
}
/**
* Apply some basic anti-spoofing to the links before they get filtered,
* see @bug 12896
*
* @param string $text
*
* @return string
*/
protected function antiSpoof( $text ) {
$text = str_replace( '．', '.', $text );
return $text;
}
/**
* @param string[] $links An array of links to check against the blacklist
* @param Title $title The title of the page to which the filter shall be applied.
* This is used to load the old links already on the page, so
* the filter is only applied to links that got added. If not given,
* the filter is applied to all $links.
*
* @return Array Matched text(s) if the edit should not be allowed, false otherwise
*/
function filter( array $links, Title $title = null ) {
$fname = 'wfSpamBlacklistFilter';
wfProfileIn( $fname );
$blacklists = $this->getBlacklists();
$whitelists = $this->getWhitelists();
if ( count( $blacklists ) ) {
// poor man's anti-spoof, see bug 12896
$newLinks = array_map( array( $this, 'antiSpoof' ), $links );
$oldLinks = array();
if ( $title !== null ) {
$oldLinks = $this->getCurrentLinks( $title );
$addedLinks = array_diff( $newLinks, $oldLinks );
} else {
// can't load old links, so treat all links as added.
$addedLinks = $newLinks;
}
wfDebugLog( 'SpamBlacklist', "Old URLs: " . implode( ', ', $oldLinks ) );
wfDebugLog( 'SpamBlacklist', "New URLs: " . implode( ', ', $newLinks ) );
wfDebugLog( 'SpamBlacklist', "Added URLs: " . implode( ', ', $addedLinks ) );
$links = implode( "\n", $addedLinks );
# Strip whitelisted URLs from the match
if( is_array( $whitelists ) ) {
wfDebugLog( 'SpamBlacklist', "Excluding whitelisted URLs from " . count( $whitelists ) .
" regexes: " . implode( ', ', $whitelists ) . "\n" );
foreach( $whitelists as $regex ) {
wfSuppressWarnings();
$newLinks = preg_replace( $regex, '', $links );
wfRestoreWarnings();
if( is_string( $newLinks ) ) {
// If there wasn't a regex error, strip the matching URLs
$links = $newLinks;
}
}
}
# Do the match
wfDebugLog( 'SpamBlacklist', "Checking text against " . count( $blacklists ) .
" regexes: " . implode( ', ', $blacklists ) . "\n" );
$retVal = false;
foreach( $blacklists as $regex ) {
wfSuppressWarnings();
$matches = array();
$check = ( preg_match_all( $regex, $links, $matches ) > 0 );
wfRestoreWarnings();
if( $check ) {
wfDebugLog( 'SpamBlacklist', "Match!\n" );
global $wgRequest;
$ip = $wgRequest->getIP();
$imploded = implode( ' ', $matches[0] );
wfDebugLog( 'SpamBlacklistHit', "$ip caught submitting spam: $imploded\n" );
$this->logFilterHit( $title, $imploded ); // Log it
if( $retVal === false ){
$retVal = array();
}
$retVal = array_merge( $retVal, $matches[1] );
}
}
if ( is_array( $retVal ) ) {
$retVal = array_unique( $retVal );
}
} else {
$retVal = false;
}
wfProfileOut( $fname );
return $retVal;
}
/**
* Look up the links currently in the article, so we can
* ignore them on a second run.
*
* WARNING: I can add more *of the same link* with no problem here.
* @param $title Title
* @return array
*/
function getCurrentLinks( $title ) {
$dbr = wfGetDB( DB_SLAVE );
$id = $title->getArticleID(); // should be zero queries
$res = $dbr->select( 'externallinks', array( 'el_to' ),
array( 'el_from' => $id ), __METHOD__ );
$links = array();
foreach ( $res as $row ) {
$links[] = $row->el_to;
}
return $links;
}
/**
* Returns the start of the regex for matches
*
* @return string
*/
public function getRegexStart() {
return '/(?:https?:)?\/\/+[a-z0-9_\-.]*(';
}
/**
* Returns the end of the regex for matches
*
* @param $batchSize
* @return string
*/
public function getRegexEnd( $batchSize ) {
return ')' . parent::getRegexEnd( $batchSize );
}
/**
* Logs the filter hit to Special:Log if
* $wgLogSpamBlacklistHits is enabled.
*
* @param Title $title
* @param string $url URL that the user attempted to add
*/
public function logFilterHit( $title, $url ) {
global $wgUser, $wgLogSpamBlacklistHits;
if ( $wgLogSpamBlacklistHits ) {
$logEntry = new ManualLogEntry( 'spamblacklist', 'hit' );
$logEntry->setPerformer( $wgUser );
$logEntry->setTarget( $title );
$logEntry->setParameters( array(
'4::url' => $url,
) );
$logid = $logEntry->insert();
$logEntry->publish( $logid, "rc" );
}
}
}
|
