HttpClient代理IP及设置连接读取超时

1、不废话，上代码：

public static void main(String[] args) throws Exception {
		CloseableHttpClient httpClient = HttpClients.createDefault(); // 创建HttpClient实例
		HttpGet httpGet = new HttpGet("http://www.tuicool.com"); // 创建Httpget实例
		//设置Http报文头信息
		httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0");
		HttpHost httoHost = new HttpHost("113.2.63.7",8118);//代理Ip
		//RequestConfig requestConfig = RequestConfig.custom().setProxy(httoHost).build();
		RequestConfig requestConfig = RequestConfig.custom()
				.setConnectTimeout(10000)//设置连接超时时间
				.setSocketTimeout(10000)//设置读取超时时间
				.setProxy(httoHost)//设置代理
				.build();
		httpGet.setConfig(requestConfig);
		CloseableHttpResponse response = null;
		response = httpClient.execute(httpGet); // 执行http get请求
		HttpEntity httpEntity = response.getEntity(); // 获取返回实体
		String web = EntityUtils.toString(httpEntity, "utf-8"); // 解析实体
		System.out.println("网页内容是：");
		System.out.println(web);
		response.close(); // 关闭response
		httpClient.close(); // 关闭HttpClient实体
}

 

2、关于IP代理

IP代理分为：透明代理、匿名代理、混淆代理、高匿代理

1）透明代理(Transparent Proxy)

REMOTE_ADDR = Proxy IP

HTTP_VIA = Proxy IP

HTTP_X_FORWARDED_FOR = Your IP

透明代理虽然可以直接“隐藏”你的IP地址，但是还是可以从HTTP_X_FORWARDED_FOR来查到你是谁。

2）匿名代理(Anonymous Proxy)

REMOTE_ADDR = proxy IP

HTTP_VIA = proxy IP

HTTP_X_FORWARDED_FOR = proxy IP

匿名代理比透明代理进步了一点：别人只能知道你用了代理，无法知道你是谁。

还有一种比纯匿名代理更先进一点的：混淆代理，见下节。

3）混淆代理(Distorting Proxies)

REMOTE_ADDR = Proxy IP

HTTP_VIA = Proxy IP

HTTP_X_FORWARDED_FOR = Random IP address

如上，与匿名代理相同，如果使用了混淆代理，别人还是能知道你在用代理，但是会得到一个假的IP地址，伪装的更逼真：-）

4）高匿代理(Elite proxy或High Anonymity Proxy)

REMOTE_ADDR = Proxy IP

HTTP_VIA = not determined

HTTP_X_FORWARDED_FOR = not determined

可以看出来，高匿代理让别人根本无法发现你是在用代理，所以是最好的选择。

 

Reference:
[1]Java1234_小锋, HttpClient使用代理IP, http://blog.java1234.com/blog/articles/251.html
[2]Java1234_小锋, HttpClient连接超时及读取超时, http://blog.java1234.com/blog/articles/254.html