使用php的curl类，检测socket5代理服务器可用性

设计初衷当然是用php curl bind不一个sokcet5去访问一个随机页面（公网）这个页面的功能就是通过一个md5来验证sokcet5服务器是否真的可用
A服务器通过 socket5发出http://xxxx/a.php?t=randkey
B服务器，echo md5($_GET['t'] . mykey);

A服务器拿到content以后也用相同算法算一个$resut看看是不是等于B服务器的echo值，如果一样，就是success 不一样就是failed

第一个文件curl.inc.php

<?php

class CurlRequest {

	private $ch = 0;

	/**
	 * Init curl session
	 *
	 * $params = array('url' => "",
	 *                    'host' => "",
	 *                   'header' => "",
	 *                   'method' => "",
	 *                   'referer' => "",
	 *                   'cookie' => "",
	 *                   'post_fields' => "",
	 *                    ['login' => '',]
	 *                    ['password' => '',]
	 *                   'timeout' => 0
	 *                   );
	 */
	public function init($params) {
		if ($this->ch == 0)
			$this->ch = curl_init();
		$user_agent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.0.9) Gecko/20061206 Firefox/1.5.0.9';
		$header = array(
			"Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5",
			"Accept-Language: ru-ru,ru;q=0.7,en-us;q=0.5,en;q=0.3",
			"Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.7",
			"Keep-Alive: 300");
		if (isset($params['host']) && $params['host'])
			$header[] = "Host: " . $params['host'];
		if (isset($params['header']) && $params['header'])
			$header[] = $params['header'];

		@curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, 1);
		@curl_setopt($this->ch, CURLOPT_VERBOSE, 1);
		@curl_setopt($this->ch, CURLOPT_HEADER, 1);
		if (strlen($params['proxy']) > 0)
			curl_setopt($this->ch, CURLOPT_PROXY, $params['proxy']);
		if (strlen($params['proxyport']) > 0)
			curl_setopt($this->ch, CURLOPT_PROXYPORT, $params['proxyprot']);
		curl_setopt($this->ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
		if ($params['method'] == "HEAD")
			@curl_setopt($this->ch, CURLOPT_NOBODY, 1);
		@curl_setopt($this->ch, CURLOPT_FOLLOWLOCATION, 1);
		@curl_setopt($this->ch, CURLOPT_HTTPHEADER, $header);
		if ($params['referer'])
			@curl_setopt($this->ch, CURLOPT_REFERER, $params['referer']);
		@curl_setopt($this->ch, CURLOPT_USERAGENT, $user_agent);
		if ($params['cookie'])
			@curl_setopt($this->ch, CURLOPT_COOKIE, $params['cookie']);

		if ($params['method'] == "POST") {
			curl_setopt($this->ch, CURLOPT_POST, true);
			curl_setopt($this->ch, CURLOPT_POSTFIELDS, $params['post_fields']);
		}
		@curl_setopt($this->ch, CURLOPT_URL, $params['url']);
		@curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, 0);
		@curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, 0);
		if (isset($params['login']) & isset($params['password']))
			@curl_setopt($this->ch, CURLOPT_USERPWD, $params['login'] . ':' . $params['password']);
		@curl_setopt($this->ch, CURLOPT_TIMEOUT, $params['timeout']);
	}

	/**
	 * Make curl request
	 *
	 * @return array  'header','body','curl_error','http_code','last_url'
	 */
	public function exec() {
		$response = curl_exec($this->ch);
		$error = curl_error($this->ch);
		$result = array('header' => "",
			'body' => "",
			'curl_error' => "",
			'http_code' => "",
			'last_url' => "");
		if ($error != "") {
			$result['curl_error'] = $error;
			return $result;
		}

		$header_size = curl_getinfo($this->ch, CURLINFO_HEADER_SIZE);
		$result['header'] = $this->pass_header(substr($response, 0, $header_size));
		$result['body'] = substr($response, $header_size);
		$result['http_code'] = curl_getinfo($this->ch, CURLINFO_HTTP_CODE);
		$result['last_url'] = curl_getinfo($this->ch, CURLINFO_EFFECTIVE_URL);
		$result['last_sent'] = curl_getinfo($this->ch, CURLINFO_HEADER_OUT);
		return $result;
	}

	function __destruct() {
		@curl_close($this->ch);
	}

	public function pass_header($header) {
		$result = array();
		$varHader = explode("\r\n", $header);
		if (count($varHader) > 0) {
			for ($i = 0; $i < count($varHader); $i++) {
				$varresult = explode(":", $varHader[$i]);
				if (is_array($varresult) && isset($varresult[1]))
					$result[$varresult[0]] = $varresult[1];
			}
		}
		return $result;
	}

}
?>

第二个文件

<?php
include 'curl.inc.php';
$GLOBALS['curl'] = new CurlRequest;

function verify($proxy, $prot) {
	$key = rand('1000000', '9999999');
	$params = array('url' => "http://xxxxx.com/a.php?md=$key", //自己找个服务器放个程序！
		'host' => 'help.dhgate.com',
		'proxy' => "$proxy:$prot",
		'proxyport' => "$prot",
		'timeout' => 10
	);
	$GLOBALS['curl']->init($params);
	$result = $GLOBALS['curl']->exec();
	if (trim($result['body']) == md5($key . 'my'))
		return true;
	else
		return false;
}

echo verify('localhost', '7777');
?>

目标服务器的那个程序。。。

<?php
echo md5($_GET['md'] . 'my');
?>

verify 函数返回的true false标志socket5服务器是否可用！
curl_setopt($this->ch,CURLOPT_PROXYTYPE,CURLPROXY_SOCKS5); 这行话，是专门给socket5用的你要验证http proxy的也一样，删了这行就行了！