|
<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2010 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: TokenBuildBehavior.class.php 2659 2012-01-23 15:04:24Z liu21st $
/**
+------------------------------------------------------------------------------
* 系统行为扩展 表单令牌生成
+------------------------------------------------------------------------------
*/
class TokenBuildBehavior extends Behavior {
// 行为参数定义
protected $options = array(
'TOKEN_ON' => true, // 开启令牌验证
'TOKEN_NAME' => '__hash__', // 令牌验证的表单隐藏字段名称
'TOKEN_TYPE' => 'md5', // 令牌验证哈希规则
'TOKEN_RESET' => true, // 令牌错误后是否重置
);
public function run(&$content){
if(C('TOKEN_ON')) {
if(strpos($content,'{__TOKEN__}')) {
// 指定表单令牌隐藏域位置
$content = str_replace('{__TOKEN__}',$this->buildToken(),$content);
}elseif(preg_match('/<\/form(\s*)>/is',$content,$match)) {
// 智能生成表单令牌隐藏域
$content = str_replace($match[0],$this->buildToken().$match[0],$content);
}
}
}
// 创建表单令牌
private function buildToken() {
$tokenName = C('TOKEN_NAME');
$tokenType = C('TOKEN_TYPE');
if(!isset($_SESSION[$tokenName])) {
$_SESSION[$tokenName] = array();
}
// 标识当前页面唯一性
$tokenKey = md5($_SERVER['REQUEST_URI']);
if(isset($_SESSION[$tokenName][$tokenKey])) {// 相同页面不重复生成session
$tokenValue = $_SESSION[$tokenName][$tokenKey];
}else{
$tokenValue = $tokenType(microtime(TRUE));
$_SESSION[$tokenName][$tokenKey] = $tokenValue;
}
// 执行一次额外动作防止远程非法提交
if($action = C('TOKEN_ACTION')){
$_SESSION[$action($tokenKey)] = true;
}
$token = '<input type="hidden" name="'.$tokenName.'" value="'.$tokenKey.'_'.$tokenValue.'" />';
return $token;
}
}
|
