wikimedia/mediawiki-extensions-AbuseFilter
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mediawiki-extensions-AbuseF.../AbuseFilter.class.php
Brad Jorsch 0ef6f6dcce Reset $wgTitle in AbuseFilter::filterAction() 
If AbuseFilter::filterAction changed $wgTitle, we need to reset it back
to the old value before returning.

And for good measure, we also need to check the main RequestContext to
make sure it didn't cache the bogus $wgTitle on us.

Bug: 53498
Change-Id: I4d706a1ee07f0b171f98e7d558d7be27e6759614
2013-09-30 14:37:52 -04:00

2305 lines
63 KiB
PHP
Raw Blame History

<?php
class AbuseFilter {
public static $statsStoragePeriod = 86400;
public static $tokenCache = array();
public static $modifyCache = array();
public static $condLimitEnabled = true;
public static $condCount = 0;
public static $filters = array();
public static $tagsToSet = array();
public static $history_mappings = array(
'af_pattern' => 'afh_pattern',
'af_user' => 'afh_user',
'af_user_text' => 'afh_user_text',
'af_timestamp' => 'afh_timestamp',
'af_comments' => 'afh_comments',
'af_public_comments' => 'afh_public_comments',
'af_deleted' => 'afh_deleted',
'af_id' => 'afh_filter',
'af_group' => 'afh_group',
);
public static $builderValues = array(
'op-arithmetic' => array(
'+' => 'addition',
'-' => 'subtraction',
'*' => 'multiplication',
'/' => 'divide',
'%' => 'modulo',
'**' => 'pow'
),
'op-comparison' => array(
'==' => 'equal',
'!=' => 'notequal',
'<' => 'lt',
'>' => 'gt',
'<=' => 'lte',
'>=' => 'gte'
),
'op-bool' => array(
'!' => 'not',
'&' => 'and',
'|' => 'or',
'^' => 'xor'
),
'misc' => array(
'in' => 'in',
'contains' => 'contains',
'like' => 'like',
'""' => 'stringlit',
'rlike' => 'rlike',
'irlike' => 'irlike',
'cond ? iftrue : iffalse' => 'tern',
'if cond then iftrue elseiffalse end' => 'cond',
),
'funcs' => array(
'length(string)' => 'length',
'lcase(string)' => 'lcase',
'ucase(string)' => 'ucase',
'ccnorm(string)' => 'ccnorm',
'rmdoubles(string)' => 'rmdoubles',
'specialratio(string)' => 'specialratio',
'norm(string)' => 'norm',
'count(needle,haystack)' => 'count',
'rcount(needle,haystack)' => 'rcount',
'rmwhitespace(text)' => 'rmwhitespace',
'rmspecials(text)' => 'rmspecials',
'ip_in_range(ip, range)' => 'ip_in_range',
'contains_any(haystack,needle1,needle2,needle3)' => 'contains-any',
'substr(subject, offset, length)' => 'substr',
'strpos(haystack, needle)' => 'strpos',
'str_replace(subject, search, replace)' => 'str_replace',
'rescape(string)' => 'rescape',
'set_var(var,value)' => 'set_var',
),
'vars' => array(
'timestamp' => 'timestamp',
'accountname' => 'accountname',
'action' => 'action',
'added_lines' => 'addedlines',
'edit_delta' => 'delta',
'edit_diff' => 'diff',
'new_size' => 'newsize',
'old_size' => 'oldsize',
'removed_lines' => 'removedlines',
'summary' => 'summary',
'article_articleid' => 'article-id',
'article_namespace' => 'article-ns',
'article_text' => 'article-text',
'article_prefixedtext' => 'article-prefixedtext',
# 'article_views' => 'article-views', # May not be enabled, defined in getBuilderValues()
'moved_from_articleid' => 'movedfrom-id',
'moved_from_namespace' => 'movedfrom-ns',
'moved_from_text' => 'movedfrom-text',
'moved_from_prefixedtext' => 'movedfrom-prefixedtext',
'moved_to_articleid' => 'movedto-id',
'moved_to_namespace' => 'movedto-ns',
'moved_to_text' => 'movedto-text',
'moved_to_prefixedtext' => 'movedto-prefixedtext',
'user_editcount' => 'user-editcount',
'user_age' => 'user-age',
'user_name' => 'user-name',
'user_groups' => 'user-groups',
'user_blocked' => 'user-blocked',
'user_emailconfirm' => 'user-emailconfirm',
'old_wikitext' => 'old-text',
'new_wikitext' => 'new-text',
'added_links' => 'added-links',
'removed_links' => 'removed-links',
'all_links' => 'all-links',
'new_pst' => 'new-pst',
'new_text' => 'new-text-stripped',
'new_html' => 'new-html',
'article_restrictions_edit' => 'restrictions-edit',
'article_restrictions_move' => 'restrictions-move',
'article_restrictions_create' => 'restrictions-create',
'article_restrictions_upload' => 'restrictions-upload',
'article_recent_contributors' => 'recent-contributors',
# 'old_text' => 'old-text-stripped', # Disabled, performance
# 'old_html' => 'old-html', # Disabled, performance
'old_links' => 'old-links',
'minor_edit' => 'minor-edit',
'file_sha1' => 'file-sha1',
),
);
public static $editboxName = null;
/**
* @param $context IContextSource
* @param $pageType
*/
public static function addNavigationLinks( IContextSource $context, $pageType ) {
$linkDefs = array(
'home' => 'Special:AbuseFilter',
'recentchanges' => 'Special:AbuseFilter/history',
'examine' => 'Special:AbuseFilter/examine',
'log' => 'Special:AbuseLog',
);
if ( $context->getUser()->isAllowed( 'abusefilter-modify' ) ) {
$linkDefs = array_merge( $linkDefs, array(
'test' => 'Special:AbuseFilter/test',
'tools' => 'Special:AbuseFilter/tools',
'import' => 'Special:AbuseFilter/import',
) );
}
// Save some translator work
$msgOverrides = array(
'recentchanges' => 'abusefilter-filter-log',
);
$links = array();
foreach ( $linkDefs as $name => $page ) {
// Give grep a chance to find the usages:
// abusefilter-topnav-home, abusefilter-topnav-test, abusefilter-topnav-examine
// abusefilter-topnav-log, abusefilter-topnav-tools, abusefilter-topnav-import
$msgName = "abusefilter-topnav-$name";
if ( isset( $msgOverrides[$name] ) ) {
$msgName = $msgOverrides[$name];
}
$msg = wfMessage( $msgName )->parse();
$title = Title::newFromText( $page );
if ( $name == $pageType ) {
$links[] = Xml::tags( 'strong', null, $msg );
} else {
$links[] = Linker::link( $title, $msg );
}
}
$linkStr = wfMessage( 'parentheses', $context->getLanguage()->pipeList( $links ) )->text();
$linkStr = wfMessage( 'abusefilter-topnav' )->parse() . " $linkStr";
$linkStr = Xml::tags( 'div', array( 'class' => 'mw-abusefilter-navigation' ), $linkStr );
$context->getOutput()->setSubtitle( $linkStr );
}
/**
* @static
* @param $user User
* @return AbuseFilterVariableHolder
*/
public static function generateUserVars( $user ) {
$vars = new AbuseFilterVariableHolder;
$vars->setLazyLoadVar(
'user_editcount',
'simple-user-accessor',
array( 'user' => $user, 'method' => 'getEditCount' )
);
$vars->setVar( 'user_name', $user->getName() );
$vars->setLazyLoadVar(
'user_emailconfirm',
'simple-user-accessor',
array( 'user' => $user, 'method' => 'getEmailAuthenticationTimestamp' )
);
$vars->setLazyLoadVar(
'user_age',
'user-age',
array( 'user' => $user, 'asof' => wfTimestampNow() )
);
$vars->setLazyLoadVar(
'user_groups',
'simple-user-accessor',
array( 'user' => $user, 'method' => 'getEffectiveGroups' )
);
$vars->setLazyLoadVar(
'user_blocked',
'simple-user-accessor',
array( 'user' => $user, 'method' => 'isBlocked' )
);
wfRunHooks( 'AbuseFilter-generateUserVars', array( $vars, $user ) );
return $vars;
}
/**
* @return array
*/
public static function getBuilderValues() {
static $realValues = null;
if ( $realValues ) {
return $realValues;
}
$realValues = self::$builderValues;
global $wgDisableCounters;
if ( !$wgDisableCounters ) {
$realValues['vars']['article_views'] = 'article-views';
}
wfRunHooks( 'AbuseFilter-builder', array( &$realValues ) );
return $realValues;
}
/**
* @param $filter
* @return bool
*/
public static function filterHidden( $filter ) {
$globalIndex = self::decodeGlobalName( $filter );
if ( $globalIndex ) {
global $wgAbuseFilterCentralDB;
if ( !$wgAbuseFilterCentralDB ) {
return false;
}
$dbr = wfGetDB( DB_SLAVE, array(), $wgAbuseFilterCentralDB );
$filter = $globalIndex;
} else {
$dbr = wfGetDB( DB_SLAVE );
}
$hidden = $dbr->selectField(
'abuse_filter',
'af_hidden',
array( 'af_id' => $filter ),
__METHOD__
);
return $hidden ? true : false;
}
/**
* @param $val int
* @throws MWException
*/
public static function triggerLimiter( $val = 1 ) {
self::$condCount += $val;
global $wgAbuseFilterConditionLimit;
if ( self::$condLimitEnabled && self::$condCount > $wgAbuseFilterConditionLimit ) {
throw new MWException( 'Condition limit reached.' );
}
}
public static function disableConditionLimit() {
// For use in batch scripts and the like
self::$condLimitEnabled = false;
}
/**
* @param $title Title
* @param $prefix
* @return AbuseFilterVariableHolder
*/
public static function generateTitleVars( $title, $prefix ) {
$vars = new AbuseFilterVariableHolder;
if ( !$title ) {
return new AbuseFilterVariableHolder;
}
$vars->setVar( $prefix . '_ARTICLEID', $title->getArticleID() );
$vars->setVar( $prefix . '_NAMESPACE', $title->getNamespace() );
$vars->setVar( $prefix . '_TEXT', $title->getText() );
$vars->setVar( $prefix . '_PREFIXEDTEXT', $title->getPrefixedText() );
global $wgDisableCounters;
if ( !$wgDisableCounters && !$title->isSpecialPage() ) {
$vars->setVar( $prefix . '_VIEWS', WikiPage::factory( $title )->getCount() );
}
// Use restrictions.
global $wgRestrictionTypes;
foreach ( $wgRestrictionTypes as $action ) {
$vars->setLazyLoadVar( "{$prefix}_restrictions_$action", 'get-page-restrictions',
array( 'title' => $title->getText(),
'namespace' => $title->getNamespace(),
'action' => $action
)
);
}
$vars->setLazyLoadVar( "{$prefix}_recent_contributors", 'load-recent-authors',
array(
'cutoff' => wfTimestampNow(),
'title' => $title->getText(),
'namespace' => $title->getNamespace()
) );
wfRunHooks( 'AbuseFilter-generateTitleVars', array( $vars, $title, $prefix ) );
return $vars;
}
/**
* @param $filter
* @return mixed
*/
public static function checkSyntax( $filter ) {
global $wgAbuseFilterParserClass;
/**
* @var $parser AbuseFilterParser
*/
$parser = new $wgAbuseFilterParserClass;
return $parser->checkSyntax( $filter );
}
/**
* @param $expr
* @param array $vars
* @return string
*/
public static function evaluateExpression( $expr, $vars = array() ) {
global $wgAbuseFilterParserClass;
if ( self::checkSyntax( $expr ) !== true ) {
return 'BADSYNTAX';
}
/**
* @var $parser AbuseFilterParser
*/
$parser = new $wgAbuseFilterParserClass( $vars );
return $parser->evaluateExpression( $expr );
}
/**
* @param $conds
* @param $vars
* @param $ignoreError bool
* @param $keepVars string
* @return bool
* @throws Exception
*/
public static function checkConditions(
$conds, $vars, $ignoreError = true, $keepVars = 'resetvars'
) {
global $wgAbuseFilterParserClass;
static $parser;
wfProfileIn( __METHOD__ );
if ( is_null( $parser ) || $keepVars == 'resetvars' ) {
/**
* @var $parser AbuseFilterParser
*/
$parser = new $wgAbuseFilterParserClass( $vars );
}
try {
$result = $parser->parse( $conds, self::$condCount );
} catch ( Exception $excep ) {
// Sigh.
$result = false;
wfDebugLog( 'AbuseFilter', 'AbuseFilter parser error: ' . $excep->getMessage() . "\n" );
if ( !$ignoreError ) {
throw $excep;
}
}
wfProfileOut( __METHOD__ );
return $result;
}
/**
* Returns an associative array of filters which were tripped
*
* @param $vars array
* @param $group string The filter group to check against.
*
* @return array
*/
public static function checkAllFilters( $vars, $group = 'default' ) {
// Fetch from the database.
wfProfileIn( __METHOD__ );
$filter_matched = array();
$dbr = wfGetDB( DB_SLAVE );
$res = $dbr->select(
'abuse_filter',
'*',
array(
'af_enabled' => 1,
'af_deleted' => 0,
'af_group' => $group,
),
__METHOD__
);
foreach( $res as $row ) {
$filter_matched[$row->af_id] = self::checkFilter( $row, $vars, true );
}
global $wgAbuseFilterCentralDB, $wgAbuseFilterIsCentral, $wgMemc;
if ( $wgAbuseFilterCentralDB && !$wgAbuseFilterIsCentral ) {
// Global filters
$globalRulesKey = self::getGlobalRulesKey( $group );
$memcacheRules = $wgMemc->get( $globalRulesKey );
if ( $memcacheRules ) {
$res = $memcacheRules;
} else {
$fdb = wfGetDB( DB_SLAVE, array(), $wgAbuseFilterCentralDB );
$res = $fdb->select(
'abuse_filter',
'*',
array(
'af_enabled' => 1,
'af_deleted' => 0,
'af_global' => 1,
'af_group' => $group,
),
__METHOD__
);
$memcacheRules = array();
foreach ( $res as $row ) {
$memcacheRules[] = $row;
}
$wgMemc->set( $globalRulesKey, $memcacheRules );
}
foreach( $res as $row ) {
$filter_matched['global-' . $row->af_id] =
self::checkFilter( $row, $vars, true, 'global-' );
}
}
// Update statistics, and disable filters which are over-blocking.
self::recordStats( $filter_matched, $group );
wfProfileOut( __METHOD__ );
return $filter_matched;
}
/**
* @static
* @param $row
* @param $vars
* @param $profile bool
* @param $prefix string
* @return bool
*/
public static function checkFilter( $row, $vars, $profile = false, $prefix = '' ) {
$filterID = $prefix . $row->af_id;
if ( $profile ) {
$startConds = self::$condCount;
$startTime = microtime( true );
}
// Store the row somewhere convenient
self::$filters[$filterID] = $row;
// Check conditions...
$pattern = trim( $row->af_pattern );
if ( self::checkConditions(
$pattern,
$vars,
true /* ignore errors */,
'keepvars'
) ) {
// Record match.
$result = true;
} else {
// Record non-match.
$result = false;
}
if ( $profile ) {
$endTime = microtime( true );
$endConds = self::$condCount;
$timeTaken = $endTime - $startTime;
$condsUsed = $endConds - $startConds;
self::recordProfilingResult( $row->af_id, $timeTaken, $condsUsed );
}
return $result;
}
/**
* @param $filter
*/
public static function resetFilterProfile( $filter ) {
global $wgMemc;
$countKey = wfMemcKey( 'abusefilter', 'profile', $filter, 'count' );
$totalKey = wfMemcKey( 'abusefilter', 'profile', $filter, 'total' );
$wgMemc->delete( $countKey );
$wgMemc->delete( $totalKey );
}
/**
* @param $filter
* @param $time
* @param $conds
*/
public static function recordProfilingResult( $filter, $time, $conds ) {
global $wgMemc;
$countKey = wfMemcKey( 'abusefilter', 'profile', $filter, 'count' );
$totalKey = wfMemcKey( 'abusefilter', 'profile', $filter, 'total' );
$totalCondKey = wfMemcKey( 'abusefilter', 'profile-conds', 'total' );
$curCount = $wgMemc->get( $countKey );
$curTotal = $wgMemc->get( $totalKey );
$curTotalConds = $wgMemc->get( $totalCondKey );
if ( $curCount ) {
$wgMemc->set( $totalCondKey, $curTotalConds + $conds, 3600 );
$wgMemc->set( $totalKey, $curTotal + $time, 3600 );
$wgMemc->incr( $countKey );
} else {
$wgMemc->set( $countKey, 1, 3600 );
$wgMemc->set( $totalKey, $time, 3600 );
$wgMemc->set( $totalCondKey, $conds, 3600 );
}
}
/**
* @param $filter
* @return array
*/
public static function getFilterProfile( $filter ) {
global $wgMemc;
$countKey = wfMemcKey( 'abusefilter', 'profile', $filter, 'count' );
$totalKey = wfMemcKey( 'abusefilter', 'profile', $filter, 'total' );
$totalCondKey = wfMemcKey( 'abusefilter', 'profile-conds', 'total' );
$curCount = $wgMemc->get( $countKey );
$curTotal = $wgMemc->get( $totalKey );
$curTotalConds = $wgMemc->get( $totalCondKey );
if ( !$curCount ) {
return array( 0, 0 );
}
$timeProfile = ( $curTotal / $curCount ) * 1000; // 1000 ms in a sec
$timeProfile = round( $timeProfile, 2 ); // Return in ms, rounded to 2dp
$condProfile = ( $curTotalConds / $curCount );
$condProfile = round( $condProfile, 0 );
return array( $timeProfile, $condProfile );
}
/**
* Utility function to decode global-$index to $index. Returns false if not global
*
* @param $filter string
*
* @return string|bool
*/
public static function decodeGlobalName( $filter ) {
if ( strpos( $filter, 'global-' ) == 0 ) {
return substr( $filter, strlen( 'global-' ) );
}
return false;
}
/**
* @param $filters array
* @return array
*/
public static function getConsequencesForFilters( $filters ) {
$globalFilters = array();
$localFilters = array();
foreach ( $filters as $filter ) {
$globalIndex = self::decodeGlobalName( $filter );
if ( $globalIndex ) {
$globalFilters[] = $globalIndex;
} else {
$localFilters[] = $filter;
}
}
global $wgAbuseFilterCentralDB;
// Load local filter info
$dbr = wfGetDB( DB_SLAVE );
// Retrieve the consequences.
$consequences = array();
if ( count( $localFilters ) ) {
$consequences = self::loadConsequencesFromDB( $dbr, $localFilters );
}
if ( count( $globalFilters ) ) {
$fdb = wfGetDB( DB_SLAVE, array(), $wgAbuseFilterCentralDB );
$consequences = $consequences + self::loadConsequencesFromDB( $fdb, $globalFilters, 'global-' );
}
return $consequences;
}
/**
* @param $dbr DatabaseBase
* @param $filters array
* @param $prefix string
* @return array
*/
public static function loadConsequencesFromDB( $dbr, $filters, $prefix = '' ) {
$actionsByFilter = array();
foreach ( $filters as $filter ) {
$actionsByFilter[$prefix . $filter] = array();
}
$res = $dbr->select(
array( 'abuse_filter_action', 'abuse_filter' ),
'*',
array( 'af_id' => $filters ),
__METHOD__,
array(),
array( 'abuse_filter_action' => array( 'LEFT JOIN', 'afa_filter=af_id' ) )
);
// Categorise consequences by filter.
global $wgAbuseFilterRestrictedActions;
foreach( $res as $row ) {
if ( $row->af_throttled
&& in_array( $row->afa_consequence, $wgAbuseFilterRestrictedActions ) )
{
# Don't do the action
} elseif ( $row->afa_filter != $row->af_id ) {
// We probably got a NULL, as it's a LEFT JOIN.
// Don't add it.
} else {
$actionsByFilter[$prefix . $row->afa_filter][$row->afa_consequence] = array(
'action' => $row->afa_consequence,
'parameters' => explode( "\n", $row->afa_parameters )
);
}
}
return $actionsByFilter;
}
/**
* Executes a list of actions.
*
* @param $filters array
* @param $title Title
* @param $vars array
* @return Status returns the operation's status. $status->isOK() will return true if
* there were no actions taken, false otherwise. $status->getValue() will return
* an array listing the actions taken. $status-getErrors(), etc, will provide
* the errors and warnings to be shown to the user to explain the actions.
*/
public static function executeFilterActions( $filters, $title, $vars ) {
wfProfileIn( __METHOD__ );
$actionsByFilter = self::getConsequencesForFilters( $filters );
$actionsTaken = array_fill_keys( $filters, array() );
$messages = array();
global $wgOut, $wgAbuseFilterDisallowGlobalLocalBlocks, $wgAbuseFilterRestrictedActions;
foreach ( $actionsByFilter as $filter => $actions ) {
// Special-case handling for warnings.
$parsed_public_comments = $wgOut->parseInline(
self::$filters[$filter]->af_public_comments );
$global_filter = ( preg_match( '/^global-/', $filter ) == 1);
if ( !empty( $actions['throttle'] ) ) {
$parameters = $actions['throttle']['parameters'];
$throttleId = array_shift( $parameters );
list( $rateCount, $ratePeriod ) = explode( ',', array_shift( $parameters ) );
$hitThrottle = false;
// The rest are throttle-types.
foreach ( $parameters as $throttleType ) {
$hitThrottle = $hitThrottle || self::isThrottled(
$throttleId, $throttleType, $title, $rateCount, $ratePeriod, $global_filter );
}
unset( $actions['throttle'] );
if ( !$hitThrottle ) {
$actionsTaken[$filter][] = 'throttle';
continue;
}
}
if ( $wgAbuseFilterDisallowGlobalLocalBlocks && $global_filter ) {
foreach ( $wgAbuseFilterRestrictedActions as $blockingAction ) {
unset( $actions[$blockingAction] );
}
}
if ( !empty( $actions['warn'] ) ) {
$parameters = $actions['warn']['parameters'];
$warnKey = 'abusefilter-warned-' . md5($title->getPrefixedText()) . '-' . $filter;
// Make sure the session is started prior to using it
if ( session_id() === '' ) {
wfSetupSession();
}
if ( !isset( $_SESSION[$warnKey] ) || !$_SESSION[$warnKey] ) {
$_SESSION[$warnKey] = true;
// Threaten them a little bit
if ( !empty( $parameters[0] ) && strlen( $parameters[0] ) ) {
$msg = $parameters[0];
} else {
$msg = 'abusefilter-warning';
}
$messages[] = array( $msg, $parsed_public_comments, $filter );
$actionsTaken[$filter][] = 'warn';
continue; // Don't do anything else.
} else {
// We already warned them
$_SESSION[$warnKey] = false;
}
unset( $actions['warn'] );
}
// prevent double warnings
if ( count( array_intersect( array_keys( $actions ), $wgAbuseFilterRestrictedActions ) ) > 0 &&
!empty( $actions['disallow'] ) ) {
unset( $actions['disallow'] );
}
// Do the rest of the actions
foreach ( $actions as $action => $info ) {
$newMsg = self::takeConsequenceAction(
$action, $info['parameters'], $title, $vars,
self::$filters[$filter]->af_public_comments
);
if ( $newMsg !== null ) {
$messages[] = $newMsg;
}
$actionsTaken[$filter][] = $action;
}
}
$status = self::buildStatus( $actionsTaken, $messages );
wfProfileOut( __METHOD__ );
return $status;
}
/**
* Constructs a Status object as returned by executeFilterActions() from the list of
* actions taken and the corresponding list of messages.
*
* @param array[] $actionsTaken associative array mapping each filter to the list if
* actions taken because of that filter.
* @param array[] $messages a list if arrays, where each array contains a message key
* followed by any message parameters.
*
* @todo: change this to accept Message objects. This is only possible from 1.21 onward,
* because before that, Status::fatal does not accept Message objects.
*
* @return Status
*/
protected static function buildStatus( array $actionsTaken, array $messages ) {
$status = Status::newGood( $actionsTaken );
foreach ( $messages as $msg ) {
// Since MW 1.21, we could just pass Message objects, but in 1.20,
// we still have to rely on arrays.
call_user_func_array( array( $status, 'fatal' ), $msg );
}
return $status;
}
/**
* @param $vars AbuseFilterVariableHolder
* @param $title Title
* @param $group string
* @return Status
*/
public static function filterAction( $vars, $title, $group = 'default' ) {
global $wgUser, $wgTitle, $wgRequest;
wfProfileIn( __METHOD__ );
$context = RequestContext::getMain();
$oldContextTitle = $context->getTitle();
$oldWgTitle = $wgTitle;
if ( !$wgTitle ) {
$wgTitle = SpecialPage::getTitleFor( 'AbuseFilter' );
}
// Add vars from extensions
wfRunHooks( 'AbuseFilter-filterAction', array( &$vars, $title ) );
// Set context
$vars->setVar( 'context', 'filter' );
$vars->setVar( 'timestamp', time() );
$dbr = wfGetDB( DB_SLAVE );
$filter_matched = self::checkAllFilters( $vars, $group );
$matched_filters = array_keys( array_filter( $filter_matched ) );
if ( count( $matched_filters ) == 0 ) {
$status = Status::newGood();
} else {
wfProfileIn( __METHOD__ . '-block' );
$status = self::executeFilterActions(
$matched_filters, $title, $vars );
$actions_taken = $status->value; // getValue() was introduced only in 1.20
$action = $vars->getVar( 'ACTION' )->toString();
// Create a template
$log_template = array(
'afl_user' => $wgUser->getId(),
'afl_user_text' => $wgUser->getName(),
'afl_timestamp' => $dbr->timestamp( wfTimestampNow() ),
'afl_namespace' => $title->getNamespace(),
'afl_title' => $title->getDBkey(),
'afl_ip' => $wgRequest->getIP()
);
// Hack to avoid revealing IPs of people creating accounts
if ( !$wgUser->getId() && ( $action == 'createaccount' || $action == 'autocreateaccount' ) ) {
$log_template['afl_user_text'] = $vars->getVar( 'accountname' )->toString();
}
self::addLogEntries( $actions_taken, $log_template, $action, $vars, $group );
wfProfileOut( __METHOD__ . '-block' );
}
// Bug 53498: If we screwed around with $wgTitle, reset it so the title
// is correctly picked up from the request later. Do the same for the
// main RequestContext, because that might have picked up the bogus
// title from $wgTitle.
if ( $wgTitle !== $oldWgTitle ) {
$wgTitle = $oldWgTitle;
}
if ( $context->getTitle() !== $oldContextTitle ) {
$context->setTitle( $oldContextTitle );
}
wfProfileOut( __METHOD__ );
return $status;
}
/**
* @param $actions_taken
* @param $log_template
* @param $action
* @param $vars AbuseFilterVariableHolder
* @param string $group
* @return mixed
*/
public static function addLogEntries( $actions_taken, $log_template, $action, $vars, $group = 'default' ) {
wfProfileIn( __METHOD__ );
$dbw = wfGetDB( DB_MASTER );
$central_log_template = array(
'afl_wiki' => wfWikiID(),
);
$log_rows = array();
$central_log_rows = array();
$logged_local_filters = array();
$logged_global_filters = array();
foreach ( $actions_taken as $filter => $actions ) {
$globalIndex = self::decodeGlobalName( $filter );
$thisLog = $log_template;
$thisLog['afl_filter'] = $filter;
$thisLog['afl_action'] = $action;
$thisLog['afl_actions'] = implode( ',', $actions );
// Don't log if we were only throttling.
if ( $thisLog['afl_actions'] != 'throttle' ) {
$log_rows[] = $thisLog;
if ( !$globalIndex ) {
$logged_local_filters[] = $filter;
}
// Global logging
if ( $globalIndex ) {
$title = Title::makeTitle( $thisLog['afl_namespace'], $thisLog['afl_title'] );
$centralLog = $thisLog + $central_log_template;
$centralLog['afl_filter'] = $globalIndex;
$centralLog['afl_title'] = $title->getPrefixedText();
$centralLog['afl_namespace'] = 0;
$central_log_rows[] = $centralLog;
$logged_global_filters[] = $globalIndex;
}
}
}
if ( !count( $log_rows ) ) {
wfProfileOut( __METHOD__ );
return;
}
// Only store the var dump if we're actually going to add log rows.
$var_dump = self::storeVarDump( $vars );
$var_dump = "stored-text:$var_dump"; // To distinguish from stuff stored directly
wfProfileIn( __METHOD__ . '-hitstats' );
global $wgMemc;
// Increment trigger counter
$wgMemc->incr( self::filterMatchesKey() );
$local_log_ids = array();
global $wgAbuseFilterNotifications, $wgAbuseFilterNotificationsPrivate;
foreach ( $log_rows as $index => $data ) {
$data['afl_var_dump'] = $var_dump;
$data['afl_id'] = $dbw->nextSequenceValue( 'abuse_filter_log_afl_id_seq' );
$dbw->insert( 'abuse_filter_log', $data, __METHOD__ );
$local_log_ids[] = $dbw->insertId();
if ( $data['afl_id'] === null ) {
$data['afl_id'] = $dbw->insertId();
}
if ( $wgAbuseFilterNotifications !== false ) {
$entry = new ManualLogEntry( 'abusefilter', 'hit' );
// Construct a user object
$user = new User();
$user->setId( $data['afl_user'] );
$user->setName( $data['afl_user_text'] );
$entry->setPerformer( $user );
// Set action target
$entry->setTarget( Title::makeTitle( $data['afl_namespace'], $data['afl_title'] ) );
// Additional info
$entry->setParameters( array(
'action' => $data['afl_action'],
'filter' => $data['afl_filter'],
'actions' => $data['afl_actions'],
'log' => $data['afl_id'],
) );
if ( self::filterHidden( $data['afl_filter'] ) && !$wgAbuseFilterNotificationsPrivate ) {
continue;
}
$entry->publish( 0, $wgAbuseFilterNotifications );
}
}
$method = __METHOD__;
if ( count( $logged_local_filters ) ) {
// Update hit-counter.
$dbw->onTransactionPreCommitOrIdle(
function() use ( $dbw, $logged_local_filters, $method ) {
$dbw->update( 'abuse_filter',
array( 'af_hit_count=af_hit_count+1' ),
array( 'af_id' => $logged_local_filters ),
$method
);
}
);
}
$global_log_ids = array();
// Global stuff
if ( count( $logged_global_filters ) ) {
$vars->computeDBVars();
$global_var_dump = self::storeVarDump( $vars, true );
$global_var_dump = "stored-text:$global_var_dump";
foreach ( $central_log_rows as $index => $data ) {
$central_log_rows[$index]['afl_var_dump'] = $global_var_dump;
}
global $wgAbuseFilterCentralDB;
$fdb = wfGetDB( DB_MASTER, array(), $wgAbuseFilterCentralDB );
foreach( $central_log_rows as $row ) {
$fdb->insert( 'abuse_filter_log', $row, __METHOD__ );
$global_log_ids[] = $dbw->insertId();
}
$fdb->onTransactionPreCommitOrIdle(
function() use ( $fdb, $logged_local_filters, $method ) {
$fdb->update( 'abuse_filter',
array( 'af_hit_count=af_hit_count+1' ),
array( 'af_id' => $logged_global_filters ),
$method
);
}
);
}
$vars->setVar( 'global_log_ids', $global_log_ids );
$vars->setVar( 'local_log_ids', $local_log_ids );
// Check for emergency disabling.
$total = $wgMemc->get( AbuseFilter::filterUsedKey( $group ) );
self::checkEmergencyDisable( $group, $logged_local_filters, $total );
wfProfileOut( __METHOD__ . '-hitstats' );
wfProfileOut( __METHOD__ );
}
/**
* Store a var dump to External Storage or the text table
* Some of this code is stolen from Revision::insertOn and friends
*
* @param $vars AbuseFilterVariableHolder
* @param $global bool
*
* @return int
*/
public static function storeVarDump( $vars, $global = false ) {
wfProfileIn( __METHOD__ );
global $wgCompressRevisions;
// Get all variables yet set and compute old and new wikitext if not yet done
// as those are needed for the diff view on top of the abuse log pages
$vars = $vars->dumpAllVars( array( 'old_wikitext', 'new_wikitext' ) );
// Vars is an array with native PHP data types (non-objects) now
$text = serialize( $vars );
$flags = array( 'nativeDataArray' );
if ( $wgCompressRevisions ) {
if ( function_exists( 'gzdeflate' ) ) {
$text = gzdeflate( $text );
$flags[] = 'gzip';
}
}
// Store to ES if applicable
global $wgDefaultExternalStore, $wgAbuseFilterCentralDB;
if ( $wgDefaultExternalStore ) {
if ( $global ) {
$text = ExternalStore::insertToForeignDefault( $text, $wgAbuseFilterCentralDB );
} else {
$text = ExternalStore::insertToDefault( $text );
}
$flags[] = 'external';
if ( !$text ) {
// Not mission-critical, just return nothing
wfProfileOut( __METHOD__ );
return null;
}
}
// Store to text table
if ( $global ) {
$dbw = wfGetDB( DB_MASTER, array(), $wgAbuseFilterCentralDB );
} else {
$dbw = wfGetDB( DB_MASTER );
}
$old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
$dbw->insert( 'text',
array(
'old_id' => $old_id,
'old_text' => $text,
'old_flags' => implode( ',', $flags ),
), __METHOD__
);
$text_id = $dbw->insertId();
wfProfileOut( __METHOD__ );
return $text_id;
}
/**
* Retrieve a var dump from External Storage or the text table
* Some of this code is stolen from Revision::loadText et al
*
* @param $stored_dump
*
* @return object|AbuseFilterVariableHolder|bool
*/
public static function loadVarDump( $stored_dump ) {
wfProfileIn( __METHOD__ );
// Back-compat
if ( strpos( $stored_dump, 'stored-text:' ) === false ) {
wfProfileOut( __METHOD__ );
return unserialize( $stored_dump );
}
$text_id = substr( $stored_dump, strlen( 'stored-text:' ) );
$dbr = wfGetDB( DB_SLAVE );
$text_row = $dbr->selectRow(
'text',
array( 'old_text', 'old_flags' ),
array( 'old_id' => $text_id ),
__METHOD__
);
if ( !$text_row ) {
wfProfileOut( __METHOD__ );
return new AbuseFilterVariableHolder;
}
$flags = explode( ',', $text_row->old_flags );
$text = $text_row->old_text;
if ( in_array( 'external', $flags ) ) {
$text = ExternalStore::fetchFromURL( $text );
}
if ( in_array( 'gzip', $flags ) ) {
$text = gzinflate( $text );
}
$obj = unserialize( $text );
if ( in_array( 'nativeDataArray', $flags ) ) {
$vars = $obj;
$obj = new AbuseFilterVariableHolder();
foreach( $vars as $key => $value ) {
$obj->setVar( $key, $value );
}
}
wfProfileOut( __METHOD__ );
return $obj;
}
/**
* @param $action string
* @param $parameters array
* @param $title Title
* @param $vars AbuseFilterVariableHolder
* @param $rule_desc
*
* @return array|null a message describing the action that was taken,
* or null if no action was taken. The message is given as an array
* containing the message key followed by any message parameters.
*
* @note: Returning the message as an array instead of a Message object is
* needed for compatibility with MW 1.20: we will be constructing a
* Status object from these messages, and before 1.21, Status did
* not accept Message objects to be added directly.
*/
public static function takeConsequenceAction( $action, $parameters, $title,
$vars, $rule_desc )
{
global $wgAbuseFilterCustomActionsHandlers, $wgRequest;
$message = null;
switch ( $action ) {
case 'disallow':
if ( strlen( $parameters[0] ) ) {
$message = array( $parameters[0], $rule_desc );
} else {
// Generic message.
$message = array(
'abusefilter-disallowed',
$rule_desc
);
}
break;
case 'block':
global $wgUser, $wgAbuseFilterBlockDuration, $wgAbuseFilterAnonBlockDuration;
$filterUser = AbuseFilter::getFilterUser();
// Create a block.
$block = new Block;
$block->setTarget( $wgUser->getName() );
$block->setBlocker( $filterUser );
$block->mReason = wfMessage(
'abusefilter-blockreason',
$rule_desc
)->inContentLanguage()->text();
$block->isHardblock( false );
$block->isAutoblocking( true );
$block->prevents( 'createaccount', true );
$block->prevents( 'editownusertalk', false );
if ( $wgUser->isAnon() && $wgAbuseFilterAnonBlockDuration !== null ) {
// The user isn't logged in and the anon block duration doesn't default to $wgAbuseFilterBlockDuration
$expiry = $wgAbuseFilterAnonBlockDuration;
} else {
$expiry = $wgAbuseFilterBlockDuration;
}
$block->mExpiry = SpecialBlock::parseExpiryInput( $expiry );
$block->insert();
// Log it
# Prepare log parameters
$logParams = array();
if ( $block->mExpiry == 'infinity' ) {
$logParams[] = 'indefinite';
} else {
$logParams[] = $expiry;
}
$logParams[] = 'nocreate';
$log = new LogPage( 'block' );
$log->addEntry( 'block',
Title::makeTitle( NS_USER, $wgUser->getName() ),
wfMessage( 'abusefilter-blockreason', $rule_desc )->inContentLanguage()->text(),
$logParams, self::getFilterUser()
);
$message = array(
'abusefilter-blocked-display',
$rule_desc
);
break;
case 'rangeblock':
$filterUser = AbuseFilter::getFilterUser();
$range = IP::sanitizeRange( $wgRequest->getIP() . '/16' );
// Create a block.
$block = new Block;
$block->setTarget( $range );
$block->setBlocker( $filterUser );
$block->mReason = wfMessage(
'abusefilter-blockreason',
$rule_desc
)->inContentLanguage()->text();
$block->isHardblock( false );
$block->prevents( 'createaccount', true );
$block->prevents( 'editownusertalk', false );
$block->mExpiry = SpecialBlock::parseExpiryInput( '1 week' );
$block->insert();
// Log it
# Prepare log parameters
$logParams = array();
$logParams[] = 'indefinite';
$logParams[] = 'nocreate';
$log = new LogPage( 'block' );
$log->addEntry( 'block', Title::makeTitle( NS_USER, $range ),
wfMessage( 'abusefilter-blockreason', $rule_desc )->inContentLanguage()->text(),
$logParams, self::getFilterUser()
);
$message = array(
'abusefilter-blocked-display',
$rule_desc
);
break;
case 'degroup':
global $wgUser;
if ( !$wgUser->isAnon() ) {
// Remove all groups from the user. Ouch.
$groups = $wgUser->getGroups();
foreach ( $groups as $group ) {
$wgUser->removeGroup( $group );
}
$message = array(
'abusefilter-degrouped',
$rule_desc
);
// Don't log it if there aren't any groups being removed!
if ( !count( $groups ) ) {
break;
}
// Log it.
$log = new LogPage( 'rights' );
$log->addEntry( 'rights',
$wgUser->getUserPage(),
wfMessage( 'abusefilter-degroupreason', $rule_desc )->inContentLanguage()->text(),
array(
implode( ', ', $groups ),
''
),
self::getFilterUser()
);
}
break;
case 'blockautopromote':
global $wgUser, $wgMemc;
if ( !$wgUser->isAnon() ) {
$blockPeriod = (int)mt_rand( 3 * 86400, 7 * 86400 ); // Block for 3-7 days.
$wgMemc->set( self::autoPromoteBlockKey( $wgUser ), true, $blockPeriod );
$message = array(
'abusefilter-autopromote-blocked',
$rule_desc
);
}
break;
case 'flag':
// Do nothing. Here for completeness.
break;
case 'tag':
// Mark with a tag on recentchanges.
global $wgUser;
$actionID = implode( '-', array(
$title->getPrefixedText(), $wgUser->getName(),
$vars->getVar( 'ACTION' )->toString()
) );
AbuseFilter::$tagsToSet[$actionID] = $parameters;
break;
default:
if( isset( $wgAbuseFilterCustomActionsHandlers[$action] ) ) {
$custom_function = $wgAbuseFilterCustomActionsHandlers[$action];
if( is_callable( $custom_function ) ) {
$msg = call_user_func( $custom_function, $action, $parameters, $title, $vars, $rule_desc );
}
if( isset( $msg ) ) {
$message = array( $msg );
}
} else {
wfDebugLog( 'AbuseFilter', "Unrecognised action $action" );
}
}
return $message;
}
/**
* @param $throttleId
* @param $types
* @param $title
* @param $rateCount
* @param $ratePeriod
* @param $global bool
* @return bool
*/
public static function isThrottled( $throttleId, $types, $title, $rateCount, $ratePeriod, $global=false ) {
global $wgMemc;
$key = self::throttleKey( $throttleId, $types, $title, $global );
$count = intval( $wgMemc->get( $key ) );
wfDebugLog( 'AbuseFilter', "Got value $count for throttle key $key\n" );
if ( $count > 0 ) {
$wgMemc->incr( $key );
$count++;
wfDebugLog( 'AbuseFilter', "Incremented throttle key $key" );
} else {
wfDebugLog( 'AbuseFilter', "Added throttle key $key with value 1" );
$wgMemc->add( $key, 1, $ratePeriod );
$count = 1;
}
if ( $count > $rateCount ) {
wfDebugLog( 'AbuseFilter', "Throttle $key hit value $count -- maximum is $rateCount." );
return true; // THROTTLED
}
wfDebugLog( 'AbuseFilter', "Throttle $key not hit!" );
return false; // NOT THROTTLED
}
/**
* @param $type
* @param $title Title
* @return Int|string
*/
public static function throttleIdentifier( $type, $title ) {
global $wgUser, $wgRequest;
switch ( $type ) {
case 'ip':
$identifier = $wgRequest->getIP();
break;
case 'user':
$identifier = $wgUser->getId();
break;
case 'range':
$identifier = substr( IP::toHex( $wgRequest->getIP() ), 0, 4 );
break;
case 'creationdate':
$reg = $wgUser->getRegistration();
$identifier = $reg - ( $reg % 86400 );
break;
case 'editcount':
// Hack for detecting different single-purpose accounts.
$identifier = $wgUser->getEditCount();
break;
case 'site':
return 1;
case 'page':
return $title->getPrefixedText();
}
return $identifier;
}
/**
* @param $throttleId
* @param $type
* @param $title Title
* @param $global bool
* @return String
*/
public static function throttleKey( $throttleId, $type, $title, $global=false ) {
$types = explode( ',', $type );
$identifiers = array();
foreach ( $types as $subtype ) {
$identifiers[] = self::throttleIdentifier( $subtype, $title );
}
$identifier = sha1( implode( ':', $identifiers ) );
global $wgAbuseFilterIsCentral, $wgAbuseFilterCentralDB;
if ( $global && !$wgAbuseFilterIsCentral ) {
list ( $globalSite, $globalPrefix ) = wfSplitWikiID( $wgAbuseFilterCentralDB );
return wfForeignMemcKey(
$globalSite, $globalPrefix,
'abusefilter', 'throttle', $throttleId, $type, $identifier );
}
return wfMemcKey( 'abusefilter', 'throttle', $throttleId, $type, $identifier );
}
/**
* @param $group
* @return String
*/
public static function getGlobalRulesKey( $group ) {
global $wgAbuseFilterIsCentral, $wgAbuseFilterCentralDB;
if ( !$wgAbuseFilterIsCentral ) {
list ( $globalSite, $globalPrefix ) = wfSplitWikiID( $wgAbuseFilterCentralDB );
return wfForeignMemcKey(
$globalSite, $globalPrefix,
'abusefilter', 'rules', $group
);
}
return wfMemcKey( 'abusefilter', 'rules', $group );
}
/**
* @param $user User
* @return String
*/
public static function autoPromoteBlockKey( $user ) {
return wfMemcKey( 'abusefilter', 'block-autopromote', $user->getId() );
}
/**
* Update statistics, and disable filters which are over-blocking.
* @param $filters
* @param $group
*/
public static function recordStats( $filters, $group = 'default' ) {
global $wgAbuseFilterConditionLimit, $wgMemc;
wfProfileIn( __METHOD__ );
// Figure out if we've triggered overflows and blocks.
$overflow_triggered = ( self::$condCount > $wgAbuseFilterConditionLimit );
// Store some keys...
$overflow_key = self::filterLimitReachedKey();
$total_key = self::filterUsedKey( $group );
$total = $wgMemc->get( $total_key );
$storage_period = self::$statsStoragePeriod;
if ( !$total || $total > 10000 ) {
// This is for if the total doesn't exist, or has gone past 1000.
// Recreate all the keys at the same time, so they expire together.
$wgMemc->set( $total_key, 0, $storage_period );
$wgMemc->set( $overflow_key, 0, $storage_period );
foreach ( $filters as $filter => $matched ) {
$wgMemc->set( self::filterMatchesKey( $filter ), 0, $storage_period );
}
$wgMemc->set( self::filterMatchesKey(), 0, $storage_period );
}
// Increment total
$wgMemc->incr( $total_key );
// Increment overflow counter, if our condition limit overflowed
if ( $overflow_triggered ) {
$wgMemc->incr( $overflow_key );
}
wfProfileOut( __METHOD__ );
}
/**
* @param $group
* @param $filters
* @param $total
*/
public static function checkEmergencyDisable( $group, $filters, $total ) {
global $wgAbuseFilterEmergencyDisableThreshold, $wgAbuseFilterEmergencyDisableCount,
$wgAbuseFilterEmergencyDisableAge, $wgMemc;
foreach ( $filters as $filter ) {
// determine emergency disable values for this action
$emergencyDisableThreshold = self::getEmergencyValue( $wgAbuseFilterEmergencyDisableThreshold, $group );
$filterEmergencyDisableCount = self::getEmergencyValue( $wgAbuseFilterEmergencyDisableCount, $group );
$emergencyDisableAge = self::getEmergencyValue( $wgAbuseFilterEmergencyDisableAge, $group );
// Increment counter
$matchCount = $wgMemc->get( self::filterMatchesKey( $filter ) );
// Handle missing keys...
if ( !$matchCount ) {
$wgMemc->set( self::filterMatchesKey( $filter ), 1, self::$statsStoragePeriod );
} else {
$wgMemc->incr( self::filterMatchesKey( $filter ) );
}
$matchCount++;
// Figure out if the filter is subject to being deleted.
$filter_age = wfTimestamp( TS_UNIX, self::$filters[$filter]->af_timestamp );
$throttle_exempt_time = $filter_age + $emergencyDisableAge;
if ( $total && $throttle_exempt_time > time()
&& $matchCount > $filterEmergencyDisableCount
&& ( $matchCount / $total ) > $emergencyDisableThreshold )
{
// More than $wgAbuseFilterEmergencyDisableCount matches,
// constituting more than $emergencyDisableThreshold
// (a fraction) of last few edits. Disable it.
$dbw = wfGetDB( DB_MASTER );
$dbw->update( 'abuse_filter',
array( 'af_throttled' => 1 ),
array( 'af_id' => $filter ),
__METHOD__
);
}
}
}
/**
* @param array $emergencyValue
* @param string $group
* @return mixed
*/
public static function getEmergencyValue( array $emergencyValue, $group ) {
return isset( $emergencyValue[$group] ) ? $emergencyValue[$group] : $emergencyValue['default'];
}
/**
* @return String
*/
public static function filterLimitReachedKey() {
return wfMemcKey( 'abusefilter', 'stats', 'overflow' );
}
/**
* @param string $group The filter's group (as defined in $wgAbuseFilterValidGroups)
* @return String
*/
public static function filterUsedKey( $group = null ) {
return wfMemcKey( 'abusefilter', 'stats', 'total', $group );
}
/**
* @param $filter
* @return String
*/
public static function filterMatchesKey( $filter = null ) {
return wfMemcKey( 'abusefilter', 'stats', 'matches', $filter );
}
/**
* @return User
*/
public static function getFilterUser() {
$user = User::newFromName( wfMessage( 'abusefilter-blocker' )->inContentLanguage()->text() );
$user->load();
if ( $user->getId() && $user->mPassword == '' ) {
// Already set up.
return $user;
}
// Not set up. Create it.
if ( !$user->getId() ) {
print 'Trying to create account -- user id is ' . $user->getId();
$user->addToDatabase();
$user->saveSettings();
// Increment site_stats.ss_users
$ssu = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
$ssu->doUpdate();
} else {
// Take over the account
$user->setPassword( null );
$user->setEmail( null );
$user->saveSettings();
}
// Promote user so it doesn't look too crazy.
$user->addGroup( 'sysop' );
return $user;
}
/**
* @param $rules String
* @param $textName String
* @param $addResultDiv Boolean
* @param $canEdit Boolean
* @return string
*/
static function buildEditBox( $rules, $textName = 'wpFilterRules', $addResultDiv = true,
$canEdit = true ) {
global $wgOut;
$textareaAttrib = array( 'dir' => 'ltr' ); # Rules are in English
if ( !$canEdit ) {
$textareaAttrib['readonly'] = 'readonly';
}
global $wgUser;
$noTestAttrib = array();
if ( !$wgUser->isAllowed( 'abusefilter-modify' ) ) {
$noTestAttrib['disabled'] = 'disabled';
$addResultDiv = false;
}
$rules = rtrim( $rules ) . "\n";
$rules = Xml::textarea( $textName, $rules, 40, 5, $textareaAttrib );
if ( $canEdit ) {
$dropDown = self::getBuilderValues();
// Generate builder drop-down
$builder = '';
$builder .= Xml::option( wfMessage( 'abusefilter-edit-builder-select' )->text() );
foreach ( $dropDown as $group => $values ) {
// Give grep a chance to find the usages:
// abusefilter-edit-builder-group-op-arithmetic, abusefilter-edit-builder-group-op-comparison,
// abusefilter-edit-builder-group-op-bool, abusefilter-edit-builder-group-misc,
// abusefilter-edit-builder-group-funcs, abusefilter-edit-builder-group-vars
$builder .=
Xml::openElement(
'optgroup',
array( 'label' => wfMessage( "abusefilter-edit-builder-group-$group" )->text() )
) . "\n";
foreach ( $values as $content => $name ) {
$builder .=
Xml::option(
wfMessage( "abusefilter-edit-builder-$group-$name" )->text(),
$content
) . "\n";
}
$builder .= Xml::closeElement( 'optgroup' ) . "\n";
}
$rules .=
Xml::tags(
'select',
array( 'id' => 'wpFilterBuilder', ),
$builder
) . ' ';
// Add syntax checking
$rules .= Xml::element( 'input',
array(
'type' => 'button',
'value' => wfMessage( 'abusefilter-edit-check' )->text(),
'id' => 'mw-abusefilter-syntaxcheck'
) + $noTestAttrib );
}
if ( $addResultDiv )
$rules .= Xml::element( 'div',
array( 'id' => 'mw-abusefilter-syntaxresult', 'style' => 'display: none;' ),
'&#160;' );
// Add script
$wgOut->addModules( 'ext.abuseFilter.edit' );
self::$editboxName = $textName;
return $rules;
}
/**
* Each version is expected to be an array( $row, $actions )
* Returns an array of fields that are different.
*
* @param $version_1
* @param $version_2
*
* @return array
*/
static function compareVersions( $version_1, $version_2 ) {
$compareFields = array(
'af_public_comments',
'af_pattern',
'af_comments',
'af_deleted',
'af_enabled',
'af_hidden',
'af_global',
'af_group',
);
$differences = array();
list( $row1, $actions1 ) = $version_1;
list( $row2, $actions2 ) = $version_2;
foreach ( $compareFields as $field ) {
if ( !isset( $row2->$field ) || $row1->$field != $row2->$field ) {
$differences[] = $field;
}
}
global $wgAbuseFilterAvailableActions;
foreach ( $wgAbuseFilterAvailableActions as $action ) {
if ( !isset( $actions1[$action] ) && !isset( $actions2[$action] ) ) {
// They're both unset
} elseif ( isset( $actions1[$action] ) && isset( $actions2[$action] ) ) {
// They're both set.
if ( array_diff( $actions1[$action]['parameters'],
$actions2[$action]['parameters'] ) )
{
// Different parameters
$differences[] = 'actions';
}
} else {
// One's unset, one's set.
$differences[] = 'actions';
}
}
return array_unique( $differences );
}
/**
* @param $row
* @return array
*/
static function translateFromHistory( $row ) {
# Translate into an abuse_filter row with some black magic.
# This is ever so slightly evil!
$af_row = new StdClass;
foreach ( self::$history_mappings as $af_col => $afh_col ) {
$af_row->$af_col = $row->$afh_col;
}
# Process flags
$af_row->af_deleted = 0;
$af_row->af_hidden = 0;
$af_row->af_enabled = 0;
$flags = explode( ',', $row->afh_flags );
foreach ( $flags as $flag ) {
$col_name = "af_$flag";
$af_row->$col_name = 1;
}
# Process actions
$actions_raw = unserialize( $row->afh_actions );
$actions_output = array();
if ( is_array( $actions_raw ) ) {
foreach ( $actions_raw as $action => $parameters ) {
$actions_output[$action] = array(
'action' => $action,
'parameters' => $parameters
);
}
}
return array( $af_row, $actions_output );
}
/**
* @param $action string
* @return String
*/
static function getActionDisplay( $action ) {
// Give grep a chance to find the usages:
// abusefilter-action-tag, abusefilter-action-throttle, abusefilter-action-warn,
// abusefilter-action-blockautopromote, abusefilter-action-block, abusefilter-action-degroup,
// abusefilter-action-rangeblock, abusefilter-action-disallow
$display = wfMessage( "abusefilter-action-$action" )->text();
$display = wfMessage( "abusefilter-action-$action", $display )->isDisabled() ? $action : $display;
return $display;
}
/**
* @param $row
* @return AbuseFilterVariableHolder|null
*/
public static function getVarsFromRCRow( $row ) {
if ( $row->rc_this_oldid ) {
// It's an edit.
$vars = self::getEditVarsFromRCRow( $row );
} elseif ( $row->rc_log_type == 'move' ) {
$vars = self::getMoveVarsFromRCRow( $row );
} elseif ( $row->rc_log_type == 'newusers' ) {
$vars = self::getCreateVarsFromRCRow( $row );
} else {
return null;
}
if ( $vars ) {
$vars->setVar( 'context', 'generated' );
$vars->setVar( 'timestamp', wfTimestamp( TS_UNIX, $row->rc_timestamp ) );
}
return $vars;
}
/**
* @param $row
* @return AbuseFilterVariableHolder
*/
public static function getCreateVarsFromRCRow( $row ) {
$vars = new AbuseFilterVariableHolder;
$vars->setVar( 'ACTION', ( $row->rc_log_action == 'autocreate' ) ? 'autocreateaccount' : 'createaccount' );
$name = Title::makeTitle( $row->rc_namespace, $row->rc_title )->getText();
// Add user data if the account was created by a registered user
if ( $row->rc_user && $name != $row->rc_user_text ) {
$user = User::newFromName( $row->rc_user_text );
$vars->addHolders( self::generateUserVars( $user ) );
}
$vars->setVar( 'accountname', $name );
return $vars;
}
/**
* @param $row
* @return AbuseFilterVariableHolder
*/
public static function getEditVarsFromRCRow( $row ) {
$vars = new AbuseFilterVariableHolder;
$title = Title::makeTitle( $row->rc_namespace, $row->rc_title );
if ( $row->rc_user ) {
$user = User::newFromName( $row->rc_user_text );
} else {
$user = new User;
$user->setName( $row->rc_user_text );
}
$vars->addHolders(
self::generateUserVars( $user ),
self::generateTitleVars( $title, 'ARTICLE' )
);
$vars->setVar( 'ACTION', 'edit' );
$vars->setVar( 'SUMMARY', $row->rc_comment );
$vars->setVar( 'minor_edit', $row->rc_minor );
$vars->setLazyLoadVar( 'new_wikitext', 'revision-text-by-id',
array( 'revid' => $row->rc_this_oldid ) );
if ( $row->rc_last_oldid ) {
$vars->setLazyLoadVar( 'old_wikitext', 'revision-text-by-id',
array( 'revid' => $row->rc_last_oldid ) );
} else {
$vars->setVar( 'old_wikitext', '' );
}
$vars->addHolders( self::getEditVars( $title ) );
return $vars;
}
/**
* @param $row
* @return AbuseFilterVariableHolder
*/
public static function getMoveVarsFromRCRow( $row ) {
$vars = new AbuseFilterVariableHolder;
if ( $row->rc_user ) {
$user = User::newFromId( $row->rc_user );
} else {
$user = new User;
$user->setName( $row->rc_user_text );
}
$params = explode( "\n", trim( $row->rc_params ) );
$oldTitle = Title::makeTitle( $row->rc_namespace, $row->rc_title );
$newTitle = Title::newFromText( $params[0] );
$vars = AbuseFilterVariableHolder::merge(
$vars,
AbuseFilter::generateUserVars( $user ),
AbuseFilter::generateTitleVars( $oldTitle, 'MOVED_FROM' ),
AbuseFilter::generateTitleVars( $newTitle, 'MOVED_TO' )
);
$vars->setVar( 'SUMMARY', $row->rc_comment );
$vars->setVar( 'ACTION', 'move' );
return $vars;
}
/**
* @param Title $title
* @param null|Page $page
* @return AbuseFilterVariableHolder
*/
public static function getEditVars( $title, Page $page = null ) {
$vars = new AbuseFilterVariableHolder;
// NOTE: $page may end up remaining null, e.g. if $title points to a special page.
if ( !$page && $title instanceof Title && $title->canExist() ) {
$page = WikiPage::factory( $title );
}
$vars->setLazyLoadVar( 'edit_diff', 'diff',
array( 'oldtext-var' => 'old_wikitext', 'newtext-var' => 'new_wikitext' ) );
$vars->setLazyLoadVar( 'new_size', 'length', array( 'length-var' => 'new_wikitext' ) );
$vars->setLazyLoadVar( 'old_size', 'length', array( 'length-var' => 'old_wikitext' ) );
$vars->setLazyLoadVar( 'edit_delta', 'subtract',
array( 'val1-var' => 'new_size', 'val2-var' => 'old_size' ) );
// Some more specific/useful details about the changes.
$vars->setLazyLoadVar( 'added_lines', 'diff-split',
array( 'diff-var' => 'edit_diff', 'line-prefix' => '+' ) );
$vars->setLazyLoadVar( 'removed_lines', 'diff-split',
array( 'diff-var' => 'edit_diff', 'line-prefix' => '-' ) );
// Links
$vars->setLazyLoadVar( 'added_links', 'link-diff-added',
array( 'oldlink-var' => 'old_links', 'newlink-var' => 'all_links' ) );
$vars->setLazyLoadVar( 'removed_links', 'link-diff-removed',
array( 'oldlink-var' => 'old_links', 'newlink-var' => 'all_links' ) );
$vars->setLazyLoadVar( 'new_text', 'strip-html',
array( 'html-var' => 'new_html' ) );
$vars->setLazyLoadVar( 'old_text', 'strip-html',
array( 'html-var' => 'old_html' ) );
if ( $title instanceof Title ) {
$vars->setLazyLoadVar( 'all_links', 'links-from-wikitext',
array(
'namespace' => $title->getNamespace(),
'title' => $title->getText(),
'text-var' => 'new_wikitext',
'article' => $page
) );
$vars->setLazyLoadVar( 'old_links', 'links-from-wikitext-or-database',
array(
'namespace' => $title->getNamespace(),
'title' => $title->getText(),
'text-var' => 'old_wikitext'
) );
$vars->setLazyLoadVar( 'new_pst', 'parse-wikitext',
array(
'namespace' => $title->getNamespace(),
'title' => $title->getText(),
'wikitext-var' => 'new_wikitext',
'article' => $page,
'pst' => true,
) );
$vars->setLazyLoadVar( 'new_html', 'parse-wikitext',
array(
'namespace' => $title->getNamespace(),
'title' => $title->getText(),
'wikitext-var' => 'new_wikitext',
'article' => $page
) );
$vars->setLazyLoadVar( 'old_html', 'parse-wikitext-nonedit',
array(
'namespace' => $title->getNamespace(),
'title' => $title->getText(),
'wikitext-var' => 'old_wikitext'
) );
}
return $vars;
}
/**
* @param $vars AbuseFilterVariableHolder
* @return string
*/
public static function buildVarDumpTable( $vars ) {
// Export all values
if ( $vars instanceof AbuseFilterVariableHolder ) {
$vars = $vars->exportAllVars();
}
$output = '';
// I don't want to change the names of the pre-existing messages
// describing the variables, nor do I want to rewrite them, so I'm just
// mapping the variable names to builder messages with a pre-existing array.
$variableMessageMappings = self::getBuilderValues();
$variableMessageMappings = $variableMessageMappings['vars'];
$output .=
Xml::openElement( 'table', array( 'class' => 'mw-abuselog-details' ) ) .
Xml::openElement( 'tbody' ) .
"\n";
$header =
Xml::element( 'th', null, wfMessage( 'abusefilter-log-details-var' )->text() ) .
Xml::element( 'th', null, wfMessage( 'abusefilter-log-details-val' )->text() );
$output .= Xml::tags( 'tr', null, $header ) . "\n";
if ( !count( $vars ) ) {
$output .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
return $output;
}
// Now, build the body of the table.
foreach ( $vars as $key => $value ) {
$key = strtolower( $key );
if ( !empty( $variableMessageMappings[$key] ) ) {
$mapping = $variableMessageMappings[$key];
$keyDisplay = wfMessage( "abusefilter-edit-builder-vars-$mapping" )->parse() .
' ' . Xml::element( 'code', null, wfMessage( 'parentheses', $key )->text() );
} else {
$keyDisplay = Xml::element( 'code', null, $key );
}
if ( is_null( $value ) )
$value = '';
$value = Xml::element( 'div', array( 'class' => 'mw-abuselog-var-value' ), $value );
$trow =
Xml::tags( 'td', array( 'class' => 'mw-abuselog-var' ), $keyDisplay ) .
Xml::tags( 'td', array( 'class' => 'mw-abuselog-var-value' ), $value );
$output .=
Xml::tags( 'tr',
array( 'class' => "mw-abuselog-details-$key mw-abuselog-value" ), $trow
) . "\n";
}
$output .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
return $output;
}
/**
* @param $page
* @param $type
* @param $title Title
* @param $sk Skin
* @param $args array
* @param $filterWikilinks bool
* @return String
*/
static function modifyActionText( $page, $type, $title, $sk, $args, $filterWikilinks ) {
list( $history_id, $filter_id ) = $args;
$details_title = SpecialPage::getTitleFor( 'AbuseFilter', "history/$filter_id/diff/prev/$history_id" );
if ( !$filterWikilinks ) { // Plaintext? Bug 43105
return wfMessage( 'abusefilter-log-entry-modify', '[[' . $title->getFullText() . ']]', '[[' . $details_title->getFullText() . ']]' )->text();
}
$filter_link = Linker::link( $title );
$details_text = wfMessage( 'abusefilter-log-detailslink' )->parse();
$details_link = Linker::link( $details_title, $details_text );
return wfMessage( 'abusefilter-log-entry-modify' )
->rawParams( $filter_link, $details_link )->parse();
}
/**
* @param $action
* @param $parameters
* @return String
*/
static function formatAction( $action, $parameters ) {
/*
* @var $wgLang Language
*/
global $wgLang;
if ( count( $parameters ) == 0 ) {
$displayAction = AbuseFilter::getActionDisplay( $action );
} else {
$displayAction = AbuseFilter::getActionDisplay( $action ) .
wfMessage( 'colon-separator' )->escaped() .
$wgLang->semicolonList( $parameters );
}
return $displayAction;
}
/**
* @param $value array
* @return string
*/
static function formatFlags( $value ) {
/*
* @var $wgLang Language
*/
global $wgLang;
$flags = array_filter( explode( ',', $value ) );
$flags_display = array();
foreach ( $flags as $flag ) {
$flags_display[] = wfMessage( "abusefilter-history-$flag" )->text();
}
return $wgLang->commaList( $flags_display );
}
/**
* @param $filterID
* @return bool|mixed|string
*/
static function getGlobalFilterDescription( $filterID ) {
global $wgAbuseFilterCentralDB;
if ( !$wgAbuseFilterCentralDB ) {
return '';
}
$fdb = wfGetDB( DB_SLAVE, array(), $wgAbuseFilterCentralDB );
return $fdb->selectField(
'abuse_filter',
'af_public_comments',
array( 'af_id' => $filterID ),
__METHOD__
);
}
/**
* Gives either the user-specified name for a group,
* or spits the input back out
* @param $group String: Internal name of the filter group
* @return String A name for that filter group, or the input.
*/
static function nameGroup($group) {
// Give grep a chance to find the usages: abusefilter-group-default
$msg = "abusefilter-group-$group";
return wfMessage($msg)->exists() ? wfMessage($msg)->escaped() : $group;
}
/**
* Look up some text of a revision from its revision id
*
* Note that this is really *some* text, we do not make *any* guarantee
* that this text will be even close to what the user actually sees, or
* that the form is fit for any intended purpose.
*
* Note also that if the revision for any reason is not an Revision
* the function returns with an empty string.
*
* @param Revision $revision a valid revision
* @param $audience Integer: one of:
* Revision::FOR_PUBLIC to be displayed to all users
* Revision::FOR_THIS_USER to be displayed to the given user
* Revision::RAW get the text regardless of permissions
* @return string|null the content of the revision as some kind of string,
* or an empty string if it can not be found
*/
static function revisionToString( $revision, $audience = Revision::FOR_THIS_USER ) {
if ( !$revision instanceof Revision ) {
return '';
}
if ( defined( 'MW_SUPPORTS_CONTENTHANDLER' ) ) {
$content = $revision->getContent( $audience );
if ( $content === null ) {
return '';
}
$result = self::contentToString( $content );
} else {
// For MediaWiki without contenthandler support (< 1.21)
$result = $revision->getText();
}
return $result;
}
/**
* Converts the given Content object to a string.
*
* This uses Content::getNativeData() if $content is an instance of TextContent,
* or Content::getTextForSearchIndex() otherwise.
*
* The hook 'AbuseFilter::contentToString' can be used to override this
* behavior.
*
* @param Content $content
*
* @return string a suitable string representation of the content.
*/
static function contentToString( Content $content ) {
$text = null;
if ( wfRunHooks( 'AbuseFilter-contentToString', array( $content, &$text ) ) ) {
$text = $content instanceof TextContent
? $content->getNativeData()
: $content->getTextForSearchIndex();
}
if ( is_string( $text ) ) {
// bug 20310
// XXX: Is this really needed? Should we rather apply PST?
$text = str_replace( "\r\n", "\n", $text );
} else {
$text = '';
}
return $text;
}
/*
* Get the history ID of the first change to a given filter
*
* @param $filterId integer: Filter id
* @return integer|bool
*/
public static function getFirstFilterChange( $filterID ) {
static $firstChanges = array();
if ( !isset( $firstChanges[ $filterID ] ) ) {
$dbr = wfGetDB( DB_SLAVE );
$row = $dbr->selectRow(
'abuse_filter_history',
'afh_id',
array(
'afh_filter' => $filterID,
),
__METHOD__,
array( 'ORDER BY' => 'afh_timestamp ASC' )
);
$firstChanges[$filterID] = $row->afh_id;
}
return $firstChanges[$filterID];
}
}
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