File Source for WebAPI

<?php
/**
* Project: WebAPI_Filter :: Filtered context or IP
* File: WebAPI/WebAPI_Filter.php
*
* WebAPI_Filter class는 단어 및 IP 필터링을 제공한다.
*
* @category HTTP
* @package WebAPI
* @subpackage WebAPI_Filter
* @author JoungKyun.Kim <http://oops.org>
* @copyright (c) 2018, OOPS.org
* @license BSD License
* @link http://pear.oops.org/package/WebAPI
* @filesource
* @since 0.0.1
*/
/**
* import oops/IPCALC pear package
*/
require_once 'ipcalc.php';
/**
* Filtered context or IP
*
* WebAPI_Filter class는 단어 및 IP 필터링을 제공한다.
*
* @package WebAPI
*/
Class WebAPI_Filter {
// {{{ properties
/**#@+
* @access private
*/
/**
* IPCALC constructor
* @var IPCALC
*/
static private $ip = null;
/**#@-*/
// }}}
// {{{ +-- private (boolean) context_normalize (&$v)
/**
* 필터링 패턴을 정규화 함
*
* @access private
* @return boolean
* @param string 필터링 패턴
*/
private function context_normalize (&$v) {
// 첫라인이 # 으로 시작하거나 공백라인일 경우 SKIP
if ( preg_match ('/^#|^[\s]*$/', $v) ) {
$v = null;
return false;
}
$src = array ('/!/', '/\x5c#/', '/#.*/', '\x5c__sharp__');
$des = array ('\!', '\__sharp__', '', '\#');
$v = preg_replace ($src, $des, $v);
return true;
}
// }}}
// {{{ +-- static public (boolean) context (&$text, &$pattern)
/**
* 정규식을 이용하여 필터링
*
* @access public
* @return boolean
* @param string 필터링할 문자열
* @param string 필터링 패턴. 정규식은 PCRE를 사용한다.
*/
static public function context (&$text, &$pattern) {
$lines = preg_split ("/\r?\n/", $pattern);
foreach ( $lines as $line ) {
if ( self::context_nomalize ($line) === false )
continue;
if ( preg_match ('/' . $line . '/ui', $text, $matches) )
return true;
}
return false;
}
// }}}
// {{{ +-- static public (boolean) context_file (&$text, &$patfile)
/**
* 필터링 파일을 이용하여 필터링
*
* @access public
* @return boolean
* @param string 필터링할 문자열
* @param string 필터링 DB 파일
*/
static public function context_file (&$text, &$patfile) {
if ( ! file_exists ($patfile) )
return false;
$pattern = file (
$patfile,
FILE_USE_INCLUDE_PATH|FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES
);
return self::context ($text, $pattern);
}
// }}}
// {{{ +-- private (string) ip_nomalize (&$v)
/**
* @access public
* @return string
* @param string 매칭할 IP
*/
private function ip_nomalize (&$v) {
// Devided Network And Subnet
list ($network, $subnet) = preg_split ('!/!', $v);
if ( self::$ip === null )
self::$ip = new IPCALC;
$ip = &self::$ip;
// Nomalizing Subnet
if ( $subnet ) {
if ( is_numeric ($subnet) )
$subnet = $ip->prefix2mask ($subnet);
else {
if ( ! $ip->valid_ipv4_addr ($subnet) )
$subnet = '255.255.255.255';
}
} else
$subnet = '255.255.255.255';
// Nomalizing Network
if ( is_numeric ($network) && $network > 16777215 ) {
$network = long2ip ($network);
} else if ( ! $ip->valid_ipv4_addr ($network) ) {
if ( preg_match ('/^([0-9]{1,3}\.){2}[0-9]{1,3}\.$/', $network) ) {
$network .= '0';
$subnet = '255.255.255.0';
} else if ( preg_match ('/^[0-9]{1,3}\.[0-9]{1,3}\.$/', $network) ) {
$network .= '0.0';
$subnet = '255.255.0.0';
} else if ( preg_match ('/^[0-9]{1,3}\.$/', $network) ) {
$network .= '0.0.0';
$subnet = '255.0.0.0';
}
}
$v = sprintf ('%s/%s', $network, $subnet);
}
// }}}
// {{{ +-- static public (boolean) ip (&$v)
/**
* 접속 IP가 주어진 CIDR/MASK에 포함이 되는지 확인
*
* @access public
* @return boolean
* @param string 매칭시킬 IP 또는 IP 블럭
* - 허가된 표현식
* - 1.1.1.1
* - 1.1.1.1/24
* - 1.1.1.1/255.255.255.0
* - 1.1.1. (1.1.1.0/24)
* - 1.1. (1.1.0.0/16)
* - 1.1.1.1 - 2.2.2.2 (range)
*/
static public function ip (&$v) {
$v = preg_replace ('/[\s]+/', '', $v);
$myip = WebAPI::client_ip ();
if ( self::$ip === null )
self::$ip = new IPCALC;
$ip = &self::$ip;
// range
if ( preg_match ('/-/', $v) ) {
$myip = ip2long ($myip);
list ($start, $end) = preg_split ('/-/', $v);
if ( ! $ip->valid_ipv4_addr ($start) )
$start = 0;
if ( ! $ip->valid_ipv4_addr ($end) )
$end = 4294967295;
$start = ip2long ($start);
$end = ip2long ($end);
if ( $myip >= $start && $myip <= $end )
return true;
return false;
}
self::ip_nomalize ($v);
list ($network, $subnet) = preg_split ('!/!', $v);
$net = $ip->network ($network, $subnet);
$netdiff = $ip->network ($myip, $subnet);
if ( $net === $netdiff )
return true;
return false;
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim: set filetype=php noet sw=4 ts=4 fdm=marker:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
?>

Source for file WebAPI_Filter.php