Question

我编写了一个代码，用于从uhunt.onlinejudge.org读取两个JSON文件。当读取第一个文件（完全读取）时，如果我尝试读取第二个文件，则会抛出java.net.protocolException: Unexpected Status Line;

我的uHunt课程：

public class uHunt  extends AsyncTask<Void, Void ,Void> {
    private String userName;
    private String uID;

    public uHunt(String _uName){
        userName = _uName;
    }

    public uHunt(){}

    private void getUID(){
        String tempURL = "https://uhunt.onlinejudge.org/api/uname2uid/" + userName;
        try {
            URL url = new URL(tempURL);
            HttpURLConnection urlc = (HttpURLConnection)url.openConnection();
            //urlc.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0a2) Gecko/20110613 Firefox/6.0a2");
            InputStream is = urlc.getInputStream();
            Scanner s = new Scanner(is).useDelimiter("\\A");
            String result = s.hasNext() ? s.next() : "";
            uID = result;
            urlc.disconnect();
            is.close();
            urlc = null;
            is = null;
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }

    protected Void doInBackground(Void ...urls){
        JSONObject jsonObject;
        try{
            getUID();
            //uID = "803880";
            URL url = new URL("https://uhunt.onlinejudge.org/api/subs-user/" + uID);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestProperty("Accept-Charset", "UTF-8");
            InputStream is = connection.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            StringBuilder sb = new StringBuilder();
            String line;
            while( (line = br.readLine()) != null){
                sb.append(line);
            }
            line = sb.toString();
            connection.disconnect();
            is.close();
            sb.delete(0,sb.length());
            jsonObject = new JSONObject(line);
        }
        catch (Exception ex){
            Log.d("Exception","Exception thrown");
            ex.printStackTrace();
        }
        return null;
    }

}

logcat的：

java.net.ProtocolException: Unexpected status line: 
at com.android.okhttp.internal.http.StatusLine.parse(StatusLine.java:54)
at com.android.okhttp.internal.http.Http1xStream.readResponse(Http1xStream.java:186)
at com.android.okhttp.internal.http.Http1xStream.readResponseHeaders(Http1xStream.java:127)
at com.android.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:737)
at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:609)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:471)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:407)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:244)
at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getInputStream(DelegatingHttpsURLConnection.java:210)
at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getInputStream(Unknown Source:0)
at com.example.redwanul.cptracker.uHunt.doInBackground(uHunt.java:69)
at com.example.redwanul.cptracker.uHunt.doInBackground(uHunt.java:23)
at android.os.AsyncTask$2.call(AsyncTask.java:333)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)

接下来，我从函数doInBackground（）中删除了函数调用getUID（），并手动存储了uID以进行检查，这次代码运行时没有任何异常。看起来HttpURLConnector和/或InputStream没有从getUID（）方法的调用中正确关闭。但是为了首先获取用户id，我需要先调用getUID（）。

java.net.ProtocolException：意外的状态行

0 个答案: