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54 行
2.5 KiB
54 行
2.5 KiB
<?php
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// +----------------------------------------------------------------------
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// | TOPThink [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2010 http://topthink.com All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Behavior;
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/**
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* 系统行为扩展：表单令牌生成
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*/
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class TokenBuildBehavior {
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public function run(&$content){
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if(C('TOKEN_ON')) {
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list($tokenName,$tokenKey,$tokenValue)=$this->getToken();
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$input_token = '<input type="hidden" name="'.$tokenName.'" value="'.$tokenKey.'_'.$tokenValue.'" />';
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$meta_token = '<meta name="'.$tokenName.'" content="'.$tokenKey.'_'.$tokenValue.'" />';
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if(strpos($content,'{__TOKEN__}')) {
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// 指定表单令牌隐藏域位置
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$content = str_replace('{__TOKEN__}',$input_token,$content);
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}elseif(preg_match('/<\/form(\s*)>/is',$content,$match)) {
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// 智能生成表单令牌隐藏域
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$content = str_replace($match[0],$input_token.$match[0],$content);
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}
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$content = str_ireplace('</head>',$meta_token.'</head>',$content);
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}else{
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$content = str_replace('{__TOKEN__}','',$content);
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}
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}
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//获得token
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private function getToken(){
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$tokenName = C('TOKEN_NAME',null,'__hash__');
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$tokenType = C('TOKEN_TYPE',null,'md5');
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if(!isset($_SESSION[$tokenName])) {
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$_SESSION[$tokenName] = array();
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}
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// 标识当前页面唯一性
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$tokenKey = md5($_SERVER['REQUEST_URI']);
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if(isset($_SESSION[$tokenName][$tokenKey])) {// 相同页面不重复生成session
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$tokenValue = $_SESSION[$tokenName][$tokenKey];
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}else{
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$tokenValue = is_callable($tokenType) ? $tokenType(microtime(true)) : md5(microtime(true));
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$_SESSION[$tokenName][$tokenKey] = $tokenValue;
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if(IS_AJAX && C('TOKEN_RESET',null,true))
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header($tokenName.': '.$tokenKey.'_'.$tokenValue); //ajax需要获得这个header并替换页面中meta中的token值
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}
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return array($tokenName,$tokenKey,$tokenValue);
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}
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}
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