即使设置了连接超时,HTTPS请求也仅在20以下的Android API上挂起

Question

即使我设置了连接超时,我做了一个java.net.HttpURLConnection并且它挂起了线路connection.connect()."b4 connect"被记录,"连接后"永远不会被记录.我已经在API 21及更高版本上进行了测试,并且工作正常,但是我在API 16-19上的测试中遇到了这个问题.这是我的代码如下.请求使用https,后端使用标准的nginx https配置.

        URL url = new URL(urlString);
        HttpURLConnection connection = (HttpURLConnection)url.openConnection();

        try {
            connection.setRequestMethod("GET");
            connection.setRequestProperty("charset", "utf-8");
            connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36");
            connection.setConnectTimeout('\uea60');
            connection.setReadTimeout('\uea60');

            connection.setInstanceFollowRedirects(false);
            Log.d(TAG, "b4 connect");
            connection.connect();
            Log.d(TAG, "after connect");
            if(connection.getResponseCode() == 200) {
                return IOUtils.toString(connection.getInputStream(), "UTF-8");
            }

        } catch (Exception var) {
            throw new Exception(var.getMessage());
        } finally {
            connection.disconnect();
        }
        return null;

Answer 1

1. 你使用一些unicode charachters来指定时间.请尝试这样的常规数字:

    connection.setConnectTimeout(30000);   
    ?onnection.setReadTimeout(30000);
   

2. 请记住,"连接后"不会在超时时记录.将抛出异常.