為什么我的node.js restful api無法從Java Android接收此輸出流？

Question

我有一個類音頻發送器，它連接到nodejs服務器並以POST方法模式上載音頻文件。

public class AudioSender implements Callable<JSONObject> {

String outputFile;

AudioSender(String fileLocation){
    outputFile=fileLocation;
}

public JSONObject call(){
    URL url = null;
    HttpURLConnection urlConnection = null;
    InputStream audioInputStream=null;
    JSONObject response=null;
    byte buffer[]=new byte[16];
    try {
        url = new URL("http://192.168.0.106:3000/upload");
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } finally {
        try {
            urlConnection = (HttpURLConnection) url.openConnection();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            urlConnection.setDoOutput(true);
            urlConnection.setChunkedStreamingMode(16);
            urlConnection.setRequestProperty("Content-Type","multipart/form-data");
            urlConnection.setRequestProperty("Connection", "Keep-Alive");
            urlConnection.setRequestProperty("Cache-Control", "no-cache");
            urlConnection.setRequestProperty(
                    "Content-Type", "multipart/form-data;boundary=*****");
            try {
                OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream());
                try {
                    audioInputStream = new BufferedInputStream(new FileInputStream(outputFile));
                    Log.d("hello","audioinputstream");
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } finally {

                    while(audioInputStream.read(buffer)!=-1) {
                        out.write(buffer);
                        Log.d("buffer",buffer.toString());
                    }
                    try {
                        audioInputStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                InputStream in = new BufferedInputStream(urlConnection.getInputStream());
                StringBuilder total = new StringBuilder();
                while(in.read(buffer)!=-1)
                    total.append(buffer);
                    Log.d("response",total.toString());
                try {
                    response = new JSONObject(total.toString());
                }catch(JSONException e){
                    Log.e("Response Parse Error", "Could not parse malformed JSON");
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return response;
}

這是執行AudioSender可調用的上載。

public void upload() {
    JSONObject response=null;
    AudioSender sender=new AudioSender(outputFile);
    FutureTask<JSONObject> uploadTask=new FutureTask<JSONObject>(sender);
    ExecutorService executorService= Executors.newFixedThreadPool(1);
    executorService.execute(uploadTask);
    Log.d("s","was here");
    while(true){
        if(uploadTask.isDone()){
            try{
                response=uploadTask.get();
            }catch(InterruptedException|ExecutionException e){
                e.printStackTrace();
                Log.e("ee","ee",e.getCause());

            }
        }
    }
}

我幾乎知道這不是節點js的錯，但這是服務器代碼：app.post（'/ upload'，function（req，res）{console.log（“有人叫！”）; req.on（'data '，function（chunk）{console.log（'res'）; console.log（chunk）;}）; req.on（'end'，function（）{console.log（“ done！”））; res。 send（{'name'：'sg'}）;}）;}）;

當我調用upload（）時，服務器控制台將打印一個叫！ 完成！

我正在調試，發現確實從服務器接收到響應的json對象。 而且我不知道out.write（buffer）是否在做這項工作，但是調試它表明緩沖區的值正在變化並且與我的音頻文件的大小相等。

請不要建議使用ION或其他任何方式。

Answer 1

我通過如下設置URLConnection解決了問題：

            boundary = "===" + System.currentTimeMillis() + "===";
            urlConnection.setUseCaches(false);
            urlConnection.setDoOutput(true);    // indicates POST method
            urlConnection.setDoInput(true);
            urlConnection.setRequestProperty("Content-Type","multipart/form-data; boundary=" + boundary);