PHP伪造referer突破防盗链
可以从这个例子中发展出很多的应用。比如隐藏真实的URL地址……嘿嘿,具体的就自己分析去吧
这里新建一个文件file.php。后面的参数就是需要伪造referfer的目标地址吧。如:file.php/http://www.xxx.xxx/xxx.mp3
$url=str_replace('/file.php/','',$_SERVER["REQUEST_URI"]);//得出需要转换的网址。这里我就偷懒,不做安全检测了,需要的自己加上去
$downfile=str_replace(" ","%20",$url);//替换空格之类,可以根据实际情况进行替换
$downfile=str_replace("http://","",$downfile);//去掉http://
$urlarr=explode("/",$downfile);//以"/"分解出域名
$domain=$urlarr[0];//域名
$getfile=str_replace($urlarr[0],'',$downfile);//得出header中的GET部分
$content = @fsockopen("$domain", 80, $errno, $errstr, 12);//连接目标主机
if (!$content){//链接不上就提示错误
die("对不起,无法连接上 $domain 。");
} www.jbxue.com
fputs($content, "GET $getfile HTTP/1.0\r\n");
fputs($content, "Host: $domain\r\n");
fputs($content, "Referer: $domain\r\n");//伪造部分
fputs($content, "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n\r\n");
while (!feof($content)) {
$tp.=fgets($content, 128);
if (strstr($tp,"200 OK")){ //这里要说明一下。header的第一行一般是请求文件的状态。具体请参照HTTP 1.1状态代码及其含义 hi.baidu.com/110911/blog/item/21f20d2475af812ed50742c5.html这里是正常的文件请求状态,只需直接转向就可以。其他状态的继续执行程序
header("Location:$url");
die();
}
}
//302 转向,大部分的防盗链系统都是先判断referfer,对了的话再转向真实的地址。下面就是获取真实的地址。
$arr=explode("\n",$tp);
$arr1=explode("Location: ",$tp);//分解出Location后面的真时地址
$arr2=explode("\n",$arr1[1]);
header('Content-Type:application/force-download');//强制下载
header("location:".$arr2[0]);//转向目标地址
die();
?>
此程序只能针对使用referer来判断是否盗链的防盗链系统,使用其他特殊方法防盗链的,这个估计就不适用了。

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