在HttpURLConnection中停止静默重试

Question

我使用HttpURLConnection的Android的奇巧一些POST数据到服务器.服务器需要很长时间才能响应,并且连接在超时前静默重试1到3次.我不希望它重试,因为服务器处理所有请求,导致Bad Things(TM).

我System.setProperty("http.keepAlive", "false")在打开连接之前尝试过,但这没有用.

Answer 1

• Implement a hard timeout yourself, and force close the HttpURLConnection by calling disconnect. This can be done from your Activity using android handler; If you use AsyncTask, you can simply call cancel or Thread.interrupt():

  new Handler().postDelayed(new Runnable() {
      public void run() {
          httpUrlConnTask.cancel(true);
      }
  }, timeout * 1000); 
  

  And in your httpUrlConnTask, call disconnect:

  if (isCancelled()) {
      urlConnection.disconnect();
      return;
  }
  

  You may have to do urlConnection in another internal child thread so you can do a while loop in asynctask monitoring for isCancelled. And a try..catch so you can close all the streams properly.

• you already have keepAlive false, and readTimeout, consider adding connection timeout too. This will set the socket timeout.