discuz!系统的_xss_check()函数原本的意义是为了论坛安全,防止XSS攻击,一般网站使用是不会出现什么问题的,但是有些网站要接入第三方接口,当第三方接口向本站post数据的时候就会报"您当前的访问请求当中含有非法字符,已经被系统拒绝",本文介绍一种简单的修改方法避免此错误。
解决方案如下:
[color=#ff0000]\source\class\discuz的discuz_application.php
[/color]查找
[code]private function _xss_check() {
static $check = array('"', '>', '<', '\'', '(', ')', 'CONTENT-TRANSFER-ENCODING');
if(isset($_GET['formhash']) && $_GET['formhash'] !== formhash()) {
system_error('request_tainting');
}
if($_SERVER['REQUEST_METHOD'] == 'GET' ) {
$temp = $_SERVER['REQUEST_URI'];
} elseif(empty ($_GET['formhash'])) {
$temp = $_SERVER['REQUEST_URI'].file_get_contents('php://input');
} else {
$temp = '';
}
if(!empty($temp)) {
$temp = strtoupper(urldecode(urldecode($temp)));
foreach ($check as $str) {
if(strpos($temp, $str) !== false) {
system_error('request_tainting');
}
}
}
return true;
}[/code]替换为:
[code]private function _xss_check() {
$temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
system_error('request_tainting');
}
return true;
}[/code]
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