getNativeData(); $regex = LinkFilter::makeRegex( $filterEntry ); return preg_match( $regex, $text ); } /** * Builds a regex pattern for $filterEntry. * * @param string $filterEntry URL, if it begins with "*.", it'll be * replaced to match any subdomain * @return String: regex pattern, for preg_match() */ private static function makeRegex( $filterEntry ) { $regex = '!http://'; if ( substr( $filterEntry, 0, 2 ) == '*.' ) { $regex .= '(?:[A-Za-z0-9.-]+\.|)'; $filterEntry = substr( $filterEntry, 2 ); } $regex .= preg_quote( $filterEntry, '!' ) . '!Si'; return $regex; } /** * Make an array to be used for calls to DatabaseBase::buildLike(), which * will match the specified string. There are several kinds of filter entry: * *.domain.com - Produces http://com.domain.%, matches domain.com * and www.domain.com * domain.com - Produces http://com.domain./%, matches domain.com * or domain.com/ but not www.domain.com * *.domain.com/x - Produces http://com.domain.%/x%, matches * www.domain.com/xy * domain.com/x - Produces http://com.domain./x%, matches * domain.com/xy but not www.domain.com/xy * * Asterisks in any other location are considered invalid. * * @param string $filterEntry domainparts * @param $prot String: protocol * @return Array to be passed to DatabaseBase::buildLike() or false on error */ public static function makeLikeArray( $filterEntry, $prot = 'http://' ) { $db = wfGetDB( DB_MASTER ); if ( substr( $filterEntry, 0, 2 ) == '*.' ) { $subdomains = true; $filterEntry = substr( $filterEntry, 2 ); if ( $filterEntry == '' ) { // We don't want to make a clause that will match everything, // that could be dangerous return false; } } else { $subdomains = false; } // No stray asterisks, that could cause confusion // It's not simple or efficient to handle it properly so we don't // handle it at all. if ( strpos( $filterEntry, '*' ) !== false ) { return false; } $slash = strpos( $filterEntry, '/' ); if ( $slash !== false ) { $path = substr( $filterEntry, $slash ); $host = substr( $filterEntry, 0, $slash ); } else { $path = '/'; $host = $filterEntry; } // Reverse the labels in the hostname, convert to lower case // For emails reverse domainpart only if ( $prot == 'mailto:' && strpos( $host, '@' ) ) { // complete email address $mailparts = explode( '@', $host ); $domainpart = strtolower( implode( '.', array_reverse( explode( '.', $mailparts[1] ) ) ) ); $host = $domainpart . '@' . $mailparts[0]; $like = array( "$prot$host", $db->anyString() ); } elseif ( $prot == 'mailto:' ) { // domainpart of email address only. do not add '.' $host = strtolower( implode( '.', array_reverse( explode( '.', $host ) ) ) ); $like = array( "$prot$host", $db->anyString() ); } else { $host = strtolower( implode( '.', array_reverse( explode( '.', $host ) ) ) ); if ( substr( $host, -1, 1 ) !== '.' ) { $host .= '.'; } $like = array( "$prot$host" ); if ( $subdomains ) { $like[] = $db->anyString(); } if ( !$subdomains || $path !== '/' ) { $like[] = $path; $like[] = $db->anyString(); } } return $like; } /** * Filters an array returned by makeLikeArray(), removing everything past first pattern placeholder. * * @param array $arr array to filter * @return array filtered array */ public static function keepOneWildcard( $arr ) { if ( !is_array( $arr ) ) { return $arr; } foreach ( $arr as $key => $value ) { if ( $value instanceof LikeMatch ) { return array_slice( $arr, 0, $key + 1 ); } } return $arr; } }