尝试检索网页时的连接时间 [英] Connection Time when trying to retrieve a webpage

问题描述

我面临一个奇怪的问题(可能很简单，但是我在:()上苦苦挣扎.请帮助我解决这个问题.

平台:WindowsXP，Java

问题陈述:
通过浏览器，我可以连接到网页.但是通过编程，它给出了连接超时错误(该代码在我的家用PC上工作正常，但在我的办公室PC上却无法正常工作).我也尝试了Windows的WGET来检索网页，但这也给了连接超时(即使winhttrack无法正常工作).我使用以下Java代码来查找代理设置.表示使用了直接连接.

Hi,
I''m facing a strange problem (may be simple, but i''m struggling on this :( ). Please help me to resolve this.

Platform: WindowsXP, Java

Problem statement:
Via browser i''m able to connect to a webpage. But through programming it''s giving connection timeout error (The code is working fine in my home PC but not in my office PC). Also i tried WGET for windows to retrieve a web page, but that too giving connection timeout (Even winhttrack is not working). I used the following java code to find out the proxy settings. It says DIRECT connection is used.

private static ProxyHost getProxyHost() {
	ProxyHost proxyHost = null;
	try {
		System.setProperty("java.net.useSystemProxies", "true");
		List<Proxy> l = ProxySelector.getDefault().select(
				new URI("http://google.com"));
		for (Iterator<Proxy> iter = l.iterator(); iter.hasNext();) {
			Proxy proxy = (Proxy) iter.next();
			InetSocketAddress addr = (InetSocketAddress) proxy.address();
			if (addr != null) {
				System.out.println("proxy: " + addr.getHostName() + ":"
						+ addr.getPort());
				proxyHost = new ProxyHost(addr.getHostName(), addr
						.getPort());
				break;
			}
		}
	} catch (Exception e) {
		e.printStackTrace();
	}
	return proxyHost;
}

检索网页的代码:

The code to retrieve webpage:

HttpClient httpClient = new HttpClient();
try {
	responseCode = httpClient.executeMethod(method);
	if (responseCode != 200) {
		return null;
	}
	br = new BufferedReader(new InputStreamReader(method
			.getResponseBodyAsStream()));
	String temp;
	StringBuffer resp = new StringBuffer();
	while ((temp = br.readLine()) != null) {
		resp.append(temp);
	}
	return resp.toString().replaceAll("\\n", "");
} catch (HttpException e) {
	e.printStackTrace();
} catch (IOException e) {
	e.printStackTrace();
} finally {
	method.releaseConnection();
	if (br != null) {
		try {
			br.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

预先感谢您的帮助.

Thanks in advance for your help.

推荐答案

写道:​​

新URI("http://google.com));

new URI("http://google.com"));

尝试http://www.google.com.

Try http://www.google.com.

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