HttpURLConnection碰到连续302跳转的问题

用HttpURLConnection联网的代码：

      HttpURLConnection conn = null;
      URL url = new URL("http://10.0.0.172/");
      conn = (HttpURLConnection) url.openConnection();

      conn .setRequestMethod("POST");
      conn .setDoInput(true);
      conn .setDoOutput(true);
      conn.setRequestProperty("X-Online-Host","www.xxxx.com");

conn.setConnectTimeout(30000); // 30秒超时
conn.connect();

如果返回的页面是一个302跳转，会自动跳转，但是如果跳转过去后还是一个302跳转，就卡在connect()这里了，超时之后一个 connection reset 的 exception. 不论Get还是Post方法，都一样问题。用setFollowRedirects关掉自动重定向，还是connection reset. 查了很长时间，还是弄不出个所以然来，看HttpURLConnection 的实现代码，redirect大于4次才会抛出一个Too many redirects 的异常，这才两个302就挂了...最后换用org.apache.http包里的东西，就没有问题。

DefaultHttpClient httpClient = new DefaultHttpClient();

HttpHost proxy = new HttpHost("10.0.0.172", 80);
httpClient.getParams().setParameter(ConnRouteParams.DEFAULT_PROXY,proxy);
HttpConnectionParams.setConnectionTimeout(httpClient.getParams(),20 * 1000);
HttpConnectionParams.setSoTimeout(httpClient.getParams(), 20 * 1000);
HttpGet httpget = new HttpGet(theurl);
HttpResponse response = httpClient.execute(httpget);

无论是自动跳转还是手动处理跳转都没有问题

作者 liujian885

补充：移动开发 , Android ,