PHP爬虫程序中怎么样伪造ip地址防止被封是很多程序员都关心的问题。下面是小编为大家带来的'php爬虫程序中怎么样伪造ip地址防止被封的知识,欢迎阅读。
代码:
代码如下
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://localhost/");
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:', 'CLIENT-IP:')); //构造IP
curl_setopt($ch, CURLOPT_REFERER, " "); //构造来路
curl_setopt($ch, CURLOPT_HEADER, 1);
$out = curl_exec($ch);
curl_close($ch);
代码如下
function getClientIp() {
if (!empty($_SERVER["HTTP_CLIENT_IP"]))
$ip = $_SERVER["HTTP_CLIENT_IP"];
else if (!empty($_SERVER["HTTP_X_FORWARDED_FOR"]))
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
else if (!empty($_SERVER["REMOTE_ADDR"]))
$ip = $_SERVER["REMOTE_ADDR"];
else
$ip = "err";
return $ip;
}
echo "IP: " . getClientIp() . "";
echo "referer: " . $_SERVER["HTTP_REFERER"];
伪造成功,这是不是给“刷票”的朋友提供了很好的换IP的方案!!
再看一下相对复杂的处理办法
以下是伪造方法:
代码如下
PHP(前提是装了curl):
PHP代码
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, "");
curl_setopt ($ch, CURLOPT_REFERER, "");
curl_exec ($ch);
curl_close ($ch);
PHP(不装curl用sock)
代码如下
$server = '';
$host = '';
$target = '/';
$referer = ''; // Referer
$port = 80;
$fp = fsockopen($server, $port, $errno, $errstr, 30);
if (!$fp)
{
echo "$errstr ($errno)<br />n";
}
else
{
$out = "GET $target HTTP/1.1rn";
$out .= "Host: $hostrn";
$out .= "Cookie: ASPSESSIONIDSQTBQSDA=DFCAPKLBBFICDAFMHNKIGKEGrn";
$out .= "Referer: $refererrn";
$out .= "Connection: Closernrn";
fwrite($fp, $out);
while (!feof($fp))
{
echo fgets($fp, 128);
}
fclose($fp);
}
IP也可以伪造
代码如下
$fp = fsockopen ("", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br>n";
} else {
$msg="GET / HTTP/1.0rn";
$msg.="Host: rn";
$msg.="Referer: n";
$msg.="Client-IP: rn";
$msg.="X-Forwarded-For: rn"; //主要是这里来构造IP
$msg.="Connection: Closernrn";
fputs ($fp, $msg);
while (!feof($fp)) {
echo fgets ($fp,1024);
}
fclose ($fp);
}
记住用fsockopen时,命令最后一定要有rnrn,不然会超时。
其实这个可以用$_SERVER['REMOTE_ADDR']来得到正确IP,但是人们为了得到代理访问IP,而采用的得到IP的方法往往不是$_SERVER['REMOTE_ADDR'],这就为我们提供了机会。