Java URL连接超时

发布于 2024-09-07 13:33:58 字数 620 浏览 4 评论 0原文

我正在尝试从 HTTP URL 解析 XML 文件。我想将超时配置为 15 秒，如果 XML 获取时间超过该时间，我想报告超时。由于某种原因，setConnectTimeout 和 setReadTimeout 不起作用。这是代码：

          URL url = new URL("http://www.myurl.com/sample.xml");
          URLConnection urlConn = url.openConnection();
          urlConn.setConnectTimeout(15000);
          urlConn.setReadTimeout(15000);
          urlConn.setAllowUserInteraction(false);         
          urlConn.setDoOutput(true);

          InputStream inStream = urlConn.getInputStream();
          InputSource input = new InputSource(inStream);

我正在捕获 SocketTimeoutException。

谢谢克里斯

原文

I am trying to parse an XML file from an HTTP URL. I want to configure a timeout of 15 seconds if the XML fetch takes longer than that, I want to report a timeout. For some reason, the setConnectTimeout and setReadTimeout do not work. Here's the code:

          URL url = new URL("http://www.myurl.com/sample.xml");
          URLConnection urlConn = url.openConnection();
          urlConn.setConnectTimeout(15000);
          urlConn.setReadTimeout(15000);
          urlConn.setAllowUserInteraction(false);         
          urlConn.setDoOutput(true);

          InputStream inStream = urlConn.getInputStream();
          InputSource input = new InputSource(inStream);

And I am catching the SocketTimeoutException.

Thanks
Chris

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绮筵 2024-09-14 13:33:58

试试这个：

       import java.net.HttpURLConnection;

       URL url = new URL("http://www.myurl.com/sample.xml");

       HttpURLConnection huc = (HttpURLConnection) url.openConnection();
       HttpURLConnection.setFollowRedirects(false);
       huc.setConnectTimeout(15 * 1000);
       huc.setRequestMethod("GET");
       huc.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
       huc.connect();
       InputStream input = huc.getInputStream();

或者

       import org.jsoup.nodes.Document;

       Document doc = null;
       try {
           doc = Jsoup.connect("http://www.myurl.com/sample.xml").get();
       } catch (Exception e) {
           //log error
       }

看看如何使用 Jsoup：http://jsoup。 org/cookbook/input/load-document-from-url

Try this:

       import java.net.HttpURLConnection;

       URL url = new URL("http://www.myurl.com/sample.xml");

       HttpURLConnection huc = (HttpURLConnection) url.openConnection();
       HttpURLConnection.setFollowRedirects(false);
       huc.setConnectTimeout(15 * 1000);
       huc.setRequestMethod("GET");
       huc.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
       huc.connect();
       InputStream input = huc.getInputStream();

OR

       import org.jsoup.nodes.Document;

       Document doc = null;
       try {
           doc = Jsoup.connect("http://www.myurl.com/sample.xml").get();
       } catch (Exception e) {
           //log error
       }

And take look on how to use Jsoup: http://jsoup.org/cookbook/input/load-document-from-url

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月隐月明月朦胧 2024-09-14 13:33:58

您可以通过线程睡眠手动强制断开连接。这是一个例子：

URLConnection con = url.openConnection();
con.setConnectTimeout(5000);
con.setReadTimeout(5000);
new Thread(new InterruptThread(con)).start();

那么

public class InterruptThread implements Runnable {

    HttpURLConnection con;
    public InterruptThread(HttpURLConnection con) {
        this.con = con;
    }

    public void run() {
        try {
            Thread.sleep(5000); // or Thread.sleep(con.getConnectTimeout())
        } catch (InterruptedException e) {

        }
        con.disconnect();
        System.out.println("Timer thread forcing to quit connection");
    }
}

You can manually force disconnection by a Thread sleep. This is an example:

URLConnection con = url.openConnection();
con.setConnectTimeout(5000);
con.setReadTimeout(5000);
new Thread(new InterruptThread(con)).start();

then

public class InterruptThread implements Runnable {

    HttpURLConnection con;
    public InterruptThread(HttpURLConnection con) {
        this.con = con;
    }

    public void run() {
        try {
            Thread.sleep(5000); // or Thread.sleep(con.getConnectTimeout())
        } catch (InterruptedException e) {

        }
        con.disconnect();
        System.out.println("Timer thread forcing to quit connection");
    }
}

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注定孤独终老 2024-09-14 13:33:58

您可以通过更改以下系统属性为从 jvm 建立的所有连接设置超时：

System.setProperty("sun.net.client.defaultConnectTimeout", "10000");
System.setProperty("sun.net.client.defaultReadTimeout", "10000");

每个连接将在 10 秒后超时。

不需要设置“defaultReadTimeout”，但如果您需要控制读取，则作为示例显示。

You can set timeouts for all connections made from the jvm by changing the following System-properties:

System.setProperty("sun.net.client.defaultConnectTimeout", "10000");
System.setProperty("sun.net.client.defaultReadTimeout", "10000");

Every connection will time out after 10 seconds.

Setting 'defaultReadTimeout' is not needed, but shown as an example if you need to control reading.

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眸中客 2024-09-14 13:33:58

我已经使用类似的代码从服务器下载日志。我调试代码并发现返回的 URLConnection 的实现是 sun.net.www.protocol.http.HttpURLConnection。

抽象类 java.net.URLConnection 有两个属性 connectTimeout 和 readTimeout，setter 位于抽象类中。不管您是否相信，实现 sun.net.www.protocol.http.HttpURLConnection 具有相同的属性 connectTimeout 和 readTimeout ，但没有设置器，并且 getInputStream 方法中使用了实现类中的属性。因此，设置 connectTimeout 和 readTimeout 是没有用的，因为它们从未在 getInputStream 方法中使用。在我看来，这是 sun.net.www.protocol.http.HttpURLConnection 实现中的错误。

我的解决方案是使用 HttpClient 和 Get 请求。

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