mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/AbuseFilter.git
synced 2024-11-29 08:14:42 +00:00
32598c18bb
This PHP extension doesn't have any speed benefits over our minimum required PHP and so isn't used in WMF production anymore. Change-Id: I4883643908f765eee5db6b3ca88eed179264e93f
1455 lines
34 KiB
PHP
1455 lines
34 KiB
PHP
<?php
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use Wikimedia\Equivset\Equivset;
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class AbuseFilterParser {
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public $mCode, $mTokens, $mPos, $mCur, $mShortCircuit, $mAllowShort, $mLen;
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/**
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* @var AbuseFilterVariableHolder
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*/
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public $mVars;
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// length,lcase,ucase,ccnorm,rmdoubles,specialratio,rmspecials,norm,count
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public static $mFunctions = [
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'lcase' => 'funcLc',
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'ucase' => 'funcUc',
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'length' => 'funcLen',
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'string' => 'castString',
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'int' => 'castInt',
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'float' => 'castFloat',
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'bool' => 'castBool',
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'norm' => 'funcNorm',
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'ccnorm' => 'funcCCNorm',
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'ccnorm_contains_any' => 'funcCCNormContainsAny',
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'specialratio' => 'funcSpecialRatio',
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'rmspecials' => 'funcRMSpecials',
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'rmdoubles' => 'funcRMDoubles',
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'rmwhitespace' => 'funcRMWhitespace',
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'count' => 'funcCount',
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'rcount' => 'funcRCount',
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'ip_in_range' => 'funcIPInRange',
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'contains_any' => 'funcContainsAny',
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'substr' => 'funcSubstr',
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'strlen' => 'funcLen',
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'strpos' => 'funcStrPos',
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'str_replace' => 'funcStrReplace',
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'rescape' => 'funcStrRegexEscape',
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'set' => 'funcSetVar',
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'set_var' => 'funcSetVar',
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];
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// Functions that affect parser state, and shouldn't be cached.
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public static $ActiveFunctions = [
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'funcSetVar',
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];
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public static $mKeywords = [
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'in' => 'keywordIn',
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'like' => 'keywordLike',
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'matches' => 'keywordLike',
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'contains' => 'keywordContains',
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'rlike' => 'keywordRegex',
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'irlike' => 'keywordRegexInsensitive',
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'regex' => 'keywordRegex',
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];
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public static $funcCache = [];
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/**
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* @var Equivset
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*/
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protected static $equivset;
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/**
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* Create a new instance
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*
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* @param AbuseFilterVariableHolder $vars
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*/
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public function __construct( $vars = null ) {
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$this->resetState();
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if ( $vars instanceof AbuseFilterVariableHolder ) {
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$this->mVars = $vars;
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}
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}
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public function resetState() {
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$this->mCode = '';
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$this->mTokens = [];
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$this->mVars = new AbuseFilterVariableHolder;
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$this->mPos = 0;
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$this->mShortCircuit = false;
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$this->mAllowShort = true;
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}
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/**
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* @param string $filter
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* @return array|bool
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*/
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public function checkSyntax( $filter ) {
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try {
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$origAS = $this->mAllowShort;
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$this->mAllowShort = false;
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$this->parse( $filter );
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} catch ( AFPUserVisibleException $excep ) {
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$this->mAllowShort = $origAS;
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return [ $excep->getMessageObj()->text(), $excep->mPosition ];
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}
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$this->mAllowShort = $origAS;
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return true;
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}
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/**
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* @param string $name
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* @param mixed $value
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*/
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public function setVar( $name, $value ) {
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$this->mVars->setVar( $name, $value );
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}
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/**
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* @param mixed $vars
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*/
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public function setVars( $vars ) {
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if ( is_array( $vars ) ) {
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foreach ( $vars as $name => $var ) {
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$this->setVar( $name, $var );
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}
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} elseif ( $vars instanceof AbuseFilterVariableHolder ) {
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$this->mVars->addHolders( $vars );
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}
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}
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/**
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* @return AFPToken
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*/
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protected function move() {
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list( $this->mCur, $this->mPos ) = $this->mTokens[$this->mPos];
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}
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/**
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* getState() function allows parser state to be rollbacked to several tokens back
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* @return AFPParserState
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*/
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protected function getState() {
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return new AFPParserState( $this->mCur, $this->mPos );
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}
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/**
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* setState() function allows parser state to be rollbacked to several tokens back
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* @param AFPParserState $state
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*/
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protected function setState( AFPParserState $state ) {
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$this->mCur = $state->token;
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$this->mPos = $state->pos;
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}
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/**
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* @return mixed
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* @throws AFPUserVisibleException
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*/
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protected function skipOverBraces() {
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if ( !( $this->mCur->type == AFPToken::TBRACE && $this->mCur->value == '(' ) ||
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!$this->mShortCircuit
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) {
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return;
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}
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$braces = 1;
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while ( $this->mCur->type != AFPToken::TNONE && $braces > 0 ) {
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$this->move();
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if ( $this->mCur->type == AFPToken::TBRACE ) {
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if ( $this->mCur->value == '(' ) {
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$braces++;
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} elseif ( $this->mCur->value == ')' ) {
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$braces--;
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}
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}
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}
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if ( !( $this->mCur->type == AFPToken::TBRACE && $this->mCur->value == ')' ) ) {
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throw new AFPUserVisibleException( 'expectednotfound', $this->mCur->pos, [ ')' ] );
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}
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}
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/**
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* @param string $code
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* @return bool
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*/
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public function parse( $code ) {
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return $this->intEval( $code )->toBool();
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}
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/**
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* @param string $filter
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* @return string
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*/
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public function evaluateExpression( $filter ) {
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return $this->intEval( $filter )->toString();
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}
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/**
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* @param string $code
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* @return AFPData
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*/
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function intEval( $code ) {
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// Setup, resetting
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$this->mCode = $code;
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$this->mTokens = AbuseFilterTokenizer::tokenize( $code );
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$this->mPos = 0;
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$this->mLen = strlen( $code );
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$this->mShortCircuit = false;
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$result = new AFPData();
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$this->doLevelEntry( $result );
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return $result;
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}
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/**
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* @param string $a
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* @param string $b
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* @return int
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*/
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static function lengthCompare( $a, $b ) {
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if ( strlen( $a ) == strlen( $b ) ) {
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return 0;
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}
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return ( strlen( $a ) < strlen( $b ) ) ? -1 : 1;
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}
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/* Levels */
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/**
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* Handles unexpected characters after the expression
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*
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* @param AFPData &$result
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* @throws AFPUserVisibleException
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*/
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protected function doLevelEntry( &$result ) {
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$this->doLevelSemicolon( $result );
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if ( $this->mCur->type != AFPToken::TNONE ) {
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throw new AFPUserVisibleException(
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'unexpectedatend',
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$this->mCur->pos, [ $this->mCur->type ]
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);
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}
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}
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/**
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* Handles multiple expressions
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* @param AFPData &$result
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*/
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protected function doLevelSemicolon( &$result ) {
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do {
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$this->move();
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if ( $this->mCur->type != AFPToken::TSTATEMENTSEPARATOR ) {
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$this->doLevelSet( $result );
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}
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} while ( $this->mCur->type == AFPToken::TSTATEMENTSEPARATOR );
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}
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/**
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* Handles multiple expressions
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*
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* @param AFPData &$result
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* @throws AFPUserVisibleException
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*/
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protected function doLevelSet( &$result ) {
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if ( $this->mCur->type == AFPToken::TID ) {
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$varname = $this->mCur->value;
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$prev = $this->getState();
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$this->move();
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if ( $this->mCur->type == AFPToken::TOP && $this->mCur->value == ':=' ) {
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$this->move();
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$this->doLevelSet( $result );
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$this->setUserVariable( $varname, $result );
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return;
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} elseif ( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == '[' ) {
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if ( !$this->mVars->varIsSet( $varname ) ) {
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throw new AFPUserVisibleException( 'unrecognisedvar',
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$this->mCur->pos,
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[ $varname ]
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);
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}
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$list = $this->mVars->getVar( $varname );
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if ( $list->type != AFPData::DLIST ) {
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throw new AFPUserVisibleException( 'notlist', $this->mCur->pos, [] );
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}
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$list = $list->toList();
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$this->move();
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if ( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == ']' ) {
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$idx = 'new';
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} else {
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$this->setState( $prev );
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$this->move();
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$idx = new AFPData();
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$this->doLevelSemicolon( $idx );
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$idx = $idx->toInt();
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if ( !( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == ']' ) ) {
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throw new AFPUserVisibleException( 'expectednotfound', $this->mCur->pos,
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[ ']', $this->mCur->type, $this->mCur->value ] );
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}
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if ( count( $list ) <= $idx ) {
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throw new AFPUserVisibleException( 'outofbounds', $this->mCur->pos,
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[ $idx, count( $result->data ) ] );
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}
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}
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$this->move();
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if ( $this->mCur->type == AFPToken::TOP && $this->mCur->value == ':=' ) {
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$this->move();
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$this->doLevelSet( $result );
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if ( $idx === 'new' ) {
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$list[] = $result;
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} else {
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$list[$idx] = $result;
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}
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$this->setUserVariable( $varname, new AFPData( AFPData::DLIST, $list ) );
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return;
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} else {
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$this->setState( $prev );
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}
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} else {
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$this->setState( $prev );
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}
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}
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$this->doLevelConditions( $result );
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}
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/**
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* @param AFPData &$result
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* @throws AFPUserVisibleException
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*/
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protected function doLevelConditions( &$result ) {
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if ( $this->mCur->type == AFPToken::TKEYWORD && $this->mCur->value == 'if' ) {
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$this->move();
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$this->doLevelBoolOps( $result );
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if ( !( $this->mCur->type == AFPToken::TKEYWORD && $this->mCur->value == 'then' ) ) {
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throw new AFPUserVisibleException( 'expectednotfound',
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$this->mCur->pos,
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[
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'then',
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$this->mCur->type,
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$this->mCur->value
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]
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);
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}
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$this->move();
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$r1 = new AFPData();
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$r2 = new AFPData();
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$isTrue = $result->toBool();
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if ( !$isTrue ) {
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$scOrig = $this->mShortCircuit;
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$this->mShortCircuit = $this->mAllowShort;
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}
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$this->doLevelConditions( $r1 );
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if ( !$isTrue ) {
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$this->mShortCircuit = $scOrig;
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}
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if ( !( $this->mCur->type == AFPToken::TKEYWORD && $this->mCur->value == 'else' ) ) {
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throw new AFPUserVisibleException( 'expectednotfound',
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$this->mCur->pos,
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[
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'else',
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$this->mCur->type,
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$this->mCur->value
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]
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);
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}
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$this->move();
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if ( $isTrue ) {
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$scOrig = $this->mShortCircuit;
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$this->mShortCircuit = $this->mAllowShort;
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}
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$this->doLevelConditions( $r2 );
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if ( $isTrue ) {
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$this->mShortCircuit = $scOrig;
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}
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if ( !( $this->mCur->type == AFPToken::TKEYWORD && $this->mCur->value == 'end' ) ) {
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throw new AFPUserVisibleException( 'expectednotfound',
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$this->mCur->pos,
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[
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'end',
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$this->mCur->type,
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$this->mCur->value
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]
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);
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}
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$this->move();
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if ( $result->toBool() ) {
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$result = $r1;
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} else {
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$result = $r2;
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}
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} else {
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$this->doLevelBoolOps( $result );
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if ( $this->mCur->type == AFPToken::TOP && $this->mCur->value == '?' ) {
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$this->move();
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$r1 = new AFPData();
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$r2 = new AFPData();
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$isTrue = $result->toBool();
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if ( !$isTrue ) {
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$scOrig = $this->mShortCircuit;
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$this->mShortCircuit = $this->mAllowShort;
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}
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$this->doLevelConditions( $r1 );
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if ( !$isTrue ) {
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$this->mShortCircuit = $scOrig;
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}
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if ( !( $this->mCur->type == AFPToken::TOP && $this->mCur->value == ':' ) ) {
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throw new AFPUserVisibleException( 'expectednotfound',
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$this->mCur->pos,
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[
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':',
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$this->mCur->type,
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$this->mCur->value
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]
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);
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}
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$this->move();
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if ( $isTrue ) {
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$scOrig = $this->mShortCircuit;
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$this->mShortCircuit = $this->mAllowShort;
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}
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$this->doLevelConditions( $r2 );
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if ( $isTrue ) {
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$this->mShortCircuit = $scOrig;
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}
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if ( $isTrue ) {
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$result = $r1;
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} else {
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$result = $r2;
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}
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}
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}
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}
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/**
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* @param AFPData &$result
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*/
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protected function doLevelBoolOps( &$result ) {
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$this->doLevelCompares( $result );
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$ops = [ '&', '|', '^' ];
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while ( $this->mCur->type == AFPToken::TOP && in_array( $this->mCur->value, $ops ) ) {
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$op = $this->mCur->value;
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$this->move();
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$r2 = new AFPData();
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// We can go on quickly as either one statement with | is true or on with & is false
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if ( ( $op == '&' && !$result->toBool() ) || ( $op == '|' && $result->toBool() ) ) {
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$orig = $this->mShortCircuit;
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$this->mShortCircuit = $this->mAllowShort;
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$this->doLevelCompares( $r2 );
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$this->mShortCircuit = $orig;
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$result = new AFPData( AFPData::DBOOL, $result->toBool() );
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continue;
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}
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$this->doLevelCompares( $r2 );
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$result = AFPData::boolOp( $result, $r2, $op );
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}
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}
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/**
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* @param string &$result
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*/
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protected function doLevelCompares( &$result ) {
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$this->doLevelSumRels( $result );
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$ops = [ '==', '===', '!=', '!==', '<', '>', '<=', '>=', '=' ];
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while ( $this->mCur->type == AFPToken::TOP && in_array( $this->mCur->value, $ops ) ) {
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$op = $this->mCur->value;
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$this->move();
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$r2 = new AFPData();
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$this->doLevelSumRels( $r2 );
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if ( $this->mShortCircuit ) {
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break; // The result doesn't matter.
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}
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AbuseFilter::triggerLimiter();
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$result = AFPData::compareOp( $result, $r2, $op );
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}
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}
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/**
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* @param string &$result
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*/
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protected function doLevelSumRels( &$result ) {
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$this->doLevelMulRels( $result );
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$ops = [ '+', '-' ];
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while ( $this->mCur->type == AFPToken::TOP && in_array( $this->mCur->value, $ops ) ) {
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$op = $this->mCur->value;
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$this->move();
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$r2 = new AFPData();
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$this->doLevelMulRels( $r2 );
|
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if ( $this->mShortCircuit ) {
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break; // The result doesn't matter.
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}
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if ( $op == '+' ) {
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$result = AFPData::sum( $result, $r2 );
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}
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if ( $op == '-' ) {
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$result = AFPData::sub( $result, $r2 );
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}
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}
|
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}
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|
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/**
|
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* @param string &$result
|
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*/
|
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protected function doLevelMulRels( &$result ) {
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$this->doLevelPow( $result );
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$ops = [ '*', '/', '%' ];
|
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while ( $this->mCur->type == AFPToken::TOP && in_array( $this->mCur->value, $ops ) ) {
|
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$op = $this->mCur->value;
|
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$this->move();
|
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$r2 = new AFPData();
|
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$this->doLevelPow( $r2 );
|
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if ( $this->mShortCircuit ) {
|
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break; // The result doesn't matter.
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}
|
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$result = AFPData::mulRel( $result, $r2, $op, $this->mCur->pos );
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}
|
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}
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/**
|
|
* @param string &$result
|
|
*/
|
|
protected function doLevelPow( &$result ) {
|
|
$this->doLevelBoolInvert( $result );
|
|
while ( $this->mCur->type == AFPToken::TOP && $this->mCur->value == '**' ) {
|
|
$this->move();
|
|
$expanent = new AFPData();
|
|
$this->doLevelBoolInvert( $expanent );
|
|
if ( $this->mShortCircuit ) {
|
|
break; // The result doesn't matter.
|
|
}
|
|
$result = AFPData::pow( $result, $expanent );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
*/
|
|
protected function doLevelBoolInvert( &$result ) {
|
|
if ( $this->mCur->type == AFPToken::TOP && $this->mCur->value == '!' ) {
|
|
$this->move();
|
|
$this->doLevelSpecialWords( $result );
|
|
if ( $this->mShortCircuit ) {
|
|
return; // The result doesn't matter.
|
|
}
|
|
$result = AFPData::boolInvert( $result );
|
|
} else {
|
|
$this->doLevelSpecialWords( $result );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
*/
|
|
protected function doLevelSpecialWords( &$result ) {
|
|
$this->doLevelUnarys( $result );
|
|
$keyword = strtolower( $this->mCur->value );
|
|
if ( $this->mCur->type == AFPToken::TKEYWORD
|
|
&& in_array( $keyword, array_keys( self::$mKeywords ) )
|
|
) {
|
|
$func = self::$mKeywords[$keyword];
|
|
$this->move();
|
|
$r2 = new AFPData();
|
|
$this->doLevelUnarys( $r2 );
|
|
|
|
if ( $this->mShortCircuit ) {
|
|
return; // The result doesn't matter.
|
|
}
|
|
|
|
AbuseFilter::triggerLimiter();
|
|
|
|
$result = AFPData::$func( $result, $r2, $this->mCur->pos );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
*/
|
|
protected function doLevelUnarys( &$result ) {
|
|
$op = $this->mCur->value;
|
|
if ( $this->mCur->type == AFPToken::TOP && ( $op == "+" || $op == "-" ) ) {
|
|
$this->move();
|
|
$this->doLevelListElements( $result );
|
|
if ( $this->mShortCircuit ) {
|
|
return; // The result doesn't matter.
|
|
}
|
|
if ( $op == '-' ) {
|
|
$result = AFPData::unaryMinus( $result );
|
|
}
|
|
} else {
|
|
$this->doLevelListElements( $result );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function doLevelListElements( &$result ) {
|
|
$this->doLevelBraces( $result );
|
|
while ( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == '[' ) {
|
|
$idx = new AFPData();
|
|
$this->doLevelSemicolon( $idx );
|
|
if ( !( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == ']' ) ) {
|
|
throw new AFPUserVisibleException( 'expectednotfound', $this->mCur->pos,
|
|
[ ']', $this->mCur->type, $this->mCur->value ] );
|
|
}
|
|
$idx = $idx->toInt();
|
|
if ( $result->type == AFPData::DLIST ) {
|
|
if ( count( $result->data ) <= $idx ) {
|
|
throw new AFPUserVisibleException( 'outofbounds', $this->mCur->pos,
|
|
[ $idx, count( $result->data ) ] );
|
|
}
|
|
$result = $result->data[$idx];
|
|
} else {
|
|
throw new AFPUserVisibleException( 'notlist', $this->mCur->pos, [] );
|
|
}
|
|
$this->move();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function doLevelBraces( &$result ) {
|
|
if ( $this->mCur->type == AFPToken::TBRACE && $this->mCur->value == '(' ) {
|
|
if ( $this->mShortCircuit ) {
|
|
$this->skipOverBraces();
|
|
} else {
|
|
$this->doLevelSemicolon( $result );
|
|
}
|
|
if ( !( $this->mCur->type == AFPToken::TBRACE && $this->mCur->value == ')' ) ) {
|
|
throw new AFPUserVisibleException(
|
|
'expectednotfound',
|
|
$this->mCur->pos,
|
|
[ ')', $this->mCur->type, $this->mCur->value ]
|
|
);
|
|
}
|
|
$this->move();
|
|
} else {
|
|
$this->doLevelFunction( $result );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function doLevelFunction( &$result ) {
|
|
if ( $this->mCur->type == AFPToken::TID && isset( self::$mFunctions[$this->mCur->value] ) ) {
|
|
$func = self::$mFunctions[$this->mCur->value];
|
|
$this->move();
|
|
if ( $this->mCur->type != AFPToken::TBRACE || $this->mCur->value != '(' ) {
|
|
throw new AFPUserVisibleException( 'expectednotfound',
|
|
$this->mCur->pos,
|
|
[
|
|
'(',
|
|
$this->mCur->type,
|
|
$this->mCur->value
|
|
]
|
|
);
|
|
}
|
|
|
|
if ( $this->mShortCircuit ) {
|
|
$this->skipOverBraces();
|
|
$this->move();
|
|
|
|
return; // The result doesn't matter.
|
|
}
|
|
|
|
$args = [];
|
|
do {
|
|
$r = new AFPData();
|
|
$this->doLevelSemicolon( $r );
|
|
$args[] = $r;
|
|
} while ( $this->mCur->type == AFPToken::TCOMMA );
|
|
|
|
if ( $this->mCur->type != AFPToken::TBRACE || $this->mCur->value != ')' ) {
|
|
throw new AFPUserVisibleException( 'expectednotfound',
|
|
$this->mCur->pos,
|
|
[
|
|
')',
|
|
$this->mCur->type,
|
|
$this->mCur->value
|
|
]
|
|
);
|
|
}
|
|
$this->move();
|
|
|
|
$funcHash = md5( $func . serialize( $args ) );
|
|
|
|
if ( isset( self::$funcCache[$funcHash] ) &&
|
|
!in_array( $func, self::$ActiveFunctions )
|
|
) {
|
|
$result = self::$funcCache[$funcHash];
|
|
} else {
|
|
AbuseFilter::triggerLimiter();
|
|
$result = self::$funcCache[$funcHash] = $this->$func( $args );
|
|
}
|
|
|
|
if ( count( self::$funcCache ) > 1000 ) {
|
|
self::$funcCache = [];
|
|
}
|
|
} else {
|
|
$this->doLevelAtom( $result );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string &$result
|
|
* @throws AFPUserVisibleException
|
|
* @return AFPData
|
|
*/
|
|
protected function doLevelAtom( &$result ) {
|
|
$tok = $this->mCur->value;
|
|
switch ( $this->mCur->type ) {
|
|
case AFPToken::TID:
|
|
if ( $this->mShortCircuit ) {
|
|
break;
|
|
}
|
|
$var = strtolower( $tok );
|
|
$result = $this->getVarValue( $var );
|
|
break;
|
|
case AFPToken::TSTRING:
|
|
$result = new AFPData( AFPData::DSTRING, $tok );
|
|
break;
|
|
case AFPToken::TFLOAT:
|
|
$result = new AFPData( AFPData::DFLOAT, $tok );
|
|
break;
|
|
case AFPToken::TINT:
|
|
$result = new AFPData( AFPData::DINT, $tok );
|
|
break;
|
|
case AFPToken::TKEYWORD:
|
|
if ( $tok == "true" ) {
|
|
$result = new AFPData( AFPData::DBOOL, true );
|
|
} elseif ( $tok == "false" ) {
|
|
$result = new AFPData( AFPData::DBOOL, false );
|
|
} elseif ( $tok == "null" ) {
|
|
$result = new AFPData();
|
|
} else {
|
|
throw new AFPUserVisibleException(
|
|
'unrecognisedkeyword',
|
|
$this->mCur->pos,
|
|
[ $tok ]
|
|
);
|
|
}
|
|
break;
|
|
case AFPToken::TNONE:
|
|
return; // Handled at entry level
|
|
case AFPToken::TBRACE:
|
|
if ( $this->mCur->value == ')' ) {
|
|
return; // Handled at the entry level
|
|
}
|
|
case AFPToken::TSQUAREBRACKET:
|
|
if ( $this->mCur->value == '[' ) {
|
|
$list = [];
|
|
while ( true ) {
|
|
$this->move();
|
|
if ( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == ']' ) {
|
|
break;
|
|
}
|
|
$item = new AFPData();
|
|
$this->doLevelSet( $item );
|
|
$list[] = $item;
|
|
if ( $this->mCur->type == AFPToken::TSQUAREBRACKET && $this->mCur->value == ']' ) {
|
|
break;
|
|
}
|
|
if ( $this->mCur->type != AFPToken::TCOMMA ) {
|
|
throw new AFPUserVisibleException(
|
|
'expectednotfound',
|
|
$this->mCur->pos,
|
|
[ ', or ]', $this->mCur->type, $this->mCur->value ]
|
|
);
|
|
}
|
|
}
|
|
$result = new AFPData( AFPData::DLIST, $list );
|
|
break;
|
|
}
|
|
default:
|
|
throw new AFPUserVisibleException(
|
|
'unexpectedtoken',
|
|
$this->mCur->pos,
|
|
[
|
|
$this->mCur->type,
|
|
$this->mCur->value
|
|
]
|
|
);
|
|
}
|
|
$this->move();
|
|
}
|
|
|
|
/* End of levels */
|
|
|
|
/**
|
|
* @param string $var
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function getVarValue( $var ) {
|
|
$var = strtolower( $var );
|
|
$builderValues = AbuseFilter::getBuilderValues();
|
|
if ( !( array_key_exists( $var, $builderValues['vars'] )
|
|
|| $this->mVars->varIsSet( $var ) )
|
|
) {
|
|
// If the variable is invalid, throw an exception
|
|
throw new AFPUserVisibleException(
|
|
'unrecognisedvar',
|
|
$this->mCur->pos,
|
|
[ $var ]
|
|
);
|
|
} else {
|
|
return $this->mVars->getVar( $var );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $name
|
|
* @param string $value
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function setUserVariable( $name, $value ) {
|
|
$builderValues = AbuseFilter::getBuilderValues();
|
|
if ( array_key_exists( $name, $builderValues['vars'] ) ) {
|
|
throw new AFPUserVisibleException( 'overridebuiltin', $this->mCur->pos, [ $name ] );
|
|
}
|
|
$this->mVars->setVar( $name, $value );
|
|
}
|
|
|
|
// Built-in functions
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcLc( $args ) {
|
|
global $wgContLang;
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'lc', 2, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
return new AFPData( AFPData::DSTRING, $wgContLang->lc( $s ) );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcUc( $args ) {
|
|
global $wgContLang;
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'uc', 2, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
return new AFPData( AFPData::DSTRING, $wgContLang->uc( $s ) );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcLen( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'len', 2, count( $args ) ]
|
|
);
|
|
}
|
|
if ( $args[0]->type == AFPData::DLIST ) {
|
|
// Don't use toString on lists, but count
|
|
return new AFPData( AFPData::DINT, count( $args[0]->data ) );
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
return new AFPData( AFPData::DINT, mb_strlen( $s, 'utf-8' ) );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcSimpleNorm( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'simplenorm', 2, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
$s = preg_replace( '/[\d\W]+/', '', $s );
|
|
$s = strtolower( $s );
|
|
|
|
return new AFPData( AFPData::DSTRING, $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcSpecialRatio( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'specialratio', 1, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
if ( !strlen( $s ) ) {
|
|
return new AFPData( AFPData::DFLOAT, 0 );
|
|
}
|
|
|
|
$nospecials = $this->rmspecials( $s );
|
|
|
|
$val = 1. - ( ( mb_strlen( $nospecials ) / mb_strlen( $s ) ) );
|
|
|
|
return new AFPData( AFPData::DFLOAT, $val );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcCount( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'count', 1, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
if ( $args[0]->type == AFPData::DLIST && count( $args ) == 1 ) {
|
|
return new AFPData( AFPData::DINT, count( $args[0]->data ) );
|
|
}
|
|
|
|
if ( count( $args ) == 1 ) {
|
|
$count = count( explode( ',', $args[0]->toString() ) );
|
|
} else {
|
|
$needle = $args[0]->toString();
|
|
$haystack = $args[1]->toString();
|
|
|
|
// Bug #60203: Keep empty parameters from causing PHP warnings
|
|
if ( $needle === '' ) {
|
|
$count = 0;
|
|
} else {
|
|
$count = substr_count( $haystack, $needle );
|
|
}
|
|
}
|
|
|
|
return new AFPData( AFPData::DINT, $count );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
* @throws Exception
|
|
*/
|
|
protected function funcRCount( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'rcount', 1, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
if ( count( $args ) == 1 ) {
|
|
$count = count( explode( ',', $args[0]->toString() ) );
|
|
} else {
|
|
$needle = $args[0]->toString();
|
|
$haystack = $args[1]->toString();
|
|
|
|
# Munge the regex
|
|
$needle = preg_replace( '!(\\\\\\\\)*(\\\\)?/!', '$1\/', $needle );
|
|
$needle = "/$needle/u";
|
|
|
|
// Omit the '$matches' argument to avoid computing them, just count.
|
|
$count = preg_match_all( $needle, $haystack );
|
|
|
|
if ( $count === false ) {
|
|
throw new AFPUserVisibleException(
|
|
'regexfailure',
|
|
$this->mCur->pos,
|
|
[ 'unspecified error in preg_match_all()', $needle ]
|
|
);
|
|
}
|
|
}
|
|
|
|
return new AFPData( AFPData::DINT, $count );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcIPInRange( $args ) {
|
|
if ( count( $args ) < 2 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'ip_in_range', 2, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$ip = $args[0]->toString();
|
|
$range = $args[1]->toString();
|
|
|
|
$result = IP::isInRange( $ip, $range );
|
|
|
|
return new AFPData( AFPData::DBOOL, $result );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcCCNorm( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'ccnorm', 1, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
$s = html_entity_decode( $s, ENT_QUOTES, 'UTF-8' );
|
|
$s = $this->ccnorm( $s );
|
|
|
|
return new AFPData( AFPData::DSTRING, $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcContainsAny( $args ) {
|
|
if ( count( $args ) < 2 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'contains_any', 2, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$s = array_shift( $args );
|
|
|
|
return new AFPData( AFPData::DBOOL, self::containsAny( $s, $args ) );
|
|
}
|
|
|
|
/**
|
|
* Normalize and search a string for multiple substrings
|
|
*
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcCCNormContainsAny( $args ) {
|
|
if ( count( $args ) < 2 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'ccnorm_contains_any', 2, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$s = array_shift( $args );
|
|
|
|
return new AFPData( AFPData::DBOOL, self::containsAny( $s, $args, true ) );
|
|
}
|
|
|
|
/**
|
|
* Search for substrings in a string
|
|
*
|
|
* Use normalize = true to make use of ccnorm and
|
|
* normalize both sides of the search.
|
|
*
|
|
* @param AFData $string
|
|
* @param AFData[] $values
|
|
* @param bool $normalize
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected static function containsAny( $string, $values, $normalize = false ) {
|
|
$string = $string->toString();
|
|
|
|
if ( $string == '' ) {
|
|
return false;
|
|
}
|
|
|
|
if ( $normalize ) {
|
|
$string = self::ccnorm( $string );
|
|
}
|
|
|
|
$values = array_map( function ( $val ) use ( $normalize ) {
|
|
$str = $val->toString();
|
|
if ( $normalize ) {
|
|
$str = AbuseFilterParser::ccnorm( $str );
|
|
}
|
|
|
|
return $str;
|
|
}, $values );
|
|
|
|
foreach ( $values as $needle ) {
|
|
// Bug #60203: Keep empty parameters from causing PHP warnings
|
|
if ( $needle !== '' && strpos( $string, $needle ) !== false ) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string $s
|
|
* @return mixed
|
|
*/
|
|
protected static function ccnorm( $s ) {
|
|
// Instatiate a single version of the equivset so the data is not loaded
|
|
// more than once.
|
|
if ( !self::$equivset ) {
|
|
self::$equivset = new Equivset();
|
|
}
|
|
|
|
return self::$equivset->normalize( $s );
|
|
}
|
|
|
|
/**
|
|
* @param string $s
|
|
* @return array|string
|
|
*/
|
|
protected function rmspecials( $s ) {
|
|
return preg_replace( '/[^\p{L}\p{N}]/u', '', $s );
|
|
}
|
|
|
|
/**
|
|
* @param string $s
|
|
* @return array|string
|
|
*/
|
|
protected function rmdoubles( $s ) {
|
|
return preg_replace( '/(.)\1+/us', '\1', $s );
|
|
}
|
|
|
|
/**
|
|
* @param string $s
|
|
* @return array|string
|
|
*/
|
|
protected function rmwhitespace( $s ) {
|
|
return preg_replace( '/\s+/u', '', $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcRMSpecials( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'rmspecials', 1, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
$s = $this->rmspecials( $s );
|
|
|
|
return new AFPData( AFPData::DSTRING, $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcRMWhitespace( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'rmwhitespace', 1, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
$s = $this->rmwhitespace( $s );
|
|
|
|
return new AFPData( AFPData::DSTRING, $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcRMDoubles( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'rmdoubles', 1, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
$s = $this->rmdoubles( $s );
|
|
|
|
return new AFPData( AFPData::DSTRING, $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcNorm( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'norm', 1, count( $args ) ]
|
|
);
|
|
}
|
|
$s = $args[0]->toString();
|
|
|
|
$s = $this->ccnorm( $s );
|
|
$s = $this->rmdoubles( $s );
|
|
$s = $this->rmspecials( $s );
|
|
$s = $this->rmwhitespace( $s );
|
|
|
|
return new AFPData( AFPData::DSTRING, $s );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcSubstr( $args ) {
|
|
if ( count( $args ) < 2 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'substr', 2, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$s = $args[0]->toString();
|
|
$offset = $args[1]->toInt();
|
|
|
|
if ( isset( $args[2] ) ) {
|
|
$length = $args[2]->toInt();
|
|
|
|
$result = mb_substr( $s, $offset, $length );
|
|
} else {
|
|
$result = mb_substr( $s, $offset );
|
|
}
|
|
|
|
return new AFPData( AFPData::DSTRING, $result );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcStrPos( $args ) {
|
|
if ( count( $args ) < 2 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'strpos', 2, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$haystack = $args[0]->toString();
|
|
$needle = $args[1]->toString();
|
|
|
|
// Bug #60203: Keep empty parameters from causing PHP warnings
|
|
if ( $needle === '' ) {
|
|
return new AFPData( AFPData::DINT, -1 );
|
|
}
|
|
|
|
if ( isset( $args[2] ) ) {
|
|
$offset = $args[2]->toInt();
|
|
|
|
$result = mb_strpos( $haystack, $needle, $offset );
|
|
} else {
|
|
$result = mb_strpos( $haystack, $needle );
|
|
}
|
|
|
|
if ( $result === false ) {
|
|
$result = -1;
|
|
}
|
|
|
|
return new AFPData( AFPData::DINT, $result );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcStrReplace( $args ) {
|
|
if ( count( $args ) < 3 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'str_replace', 3, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$subject = $args[0]->toString();
|
|
$search = $args[1]->toString();
|
|
$replace = $args[2]->toString();
|
|
|
|
return new AFPData( AFPData::DSTRING, str_replace( $search, $replace, $subject ) );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcStrRegexEscape( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException( 'notenoughargs', $this->mCur->pos,
|
|
[ 'rescape', 1, count( $args ) ] );
|
|
}
|
|
|
|
$string = $args[0]->toString();
|
|
|
|
// preg_quote does not need the second parameter, since rlike takes
|
|
// care of the delimiter symbol itself
|
|
return new AFPData( AFPData::DSTRING, preg_quote( $string ) );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return mixed
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function funcSetVar( $args ) {
|
|
if ( count( $args ) < 2 ) {
|
|
throw new AFPUserVisibleException(
|
|
'notenoughargs',
|
|
$this->mCur->pos,
|
|
[ 'set_var', 2, count( $args ) ]
|
|
);
|
|
}
|
|
|
|
$varName = $args[0]->toString();
|
|
$value = $args[1];
|
|
|
|
$this->setUserVariable( $varName, $value );
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function castString( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException( 'noparams', $this->mCur->pos, [ __METHOD__ ] );
|
|
}
|
|
$val = $args[0];
|
|
|
|
return AFPData::castTypes( $val, AFPData::DSTRING );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function castInt( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException( 'noparams', $this->mCur->pos, [ __METHOD__ ] );
|
|
}
|
|
$val = $args[0];
|
|
|
|
return AFPData::castTypes( $val, AFPData::DINT );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function castFloat( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException( 'noparams', $this->mCur->pos, [ __METHOD__ ] );
|
|
}
|
|
$val = $args[0];
|
|
|
|
return AFPData::castTypes( $val, AFPData::DFLOAT );
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @return AFPData
|
|
* @throws AFPUserVisibleException
|
|
*/
|
|
protected function castBool( $args ) {
|
|
if ( count( $args ) < 1 ) {
|
|
throw new AFPUserVisibleException( 'noparams', $this->mCur->pos, [ __METHOD__ ] );
|
|
}
|
|
$val = $args[0];
|
|
|
|
return AFPData::castTypes( $val, AFPData::DBOOL );
|
|
}
|
|
}
|