Question

我想使用来自android studio的POST请求向烧瓶服务器发送一个mp3文件。我从设备读取了一个mp3文件并存储在输入流对象中。烧瓶服务器将请求标识为POST请求并创建mp3文件。但是当我播放mp3文件时它不起作用。所以连接部分没有任何问题。我想知道如何在我的POST请求中发送这个输入流对象并让它成功播放服务器上的mp3文件（Raspberry Pi）。

获取mp3文件并存储在输入流中的部分：

if(!DocumentsContract.isDocumentUri(this, data.getData()))
    throw new RuntimeException("Not a documentsContract document");

try {
    InputStream is = getContentResolver().openInputStream(data.getData());

    new Main4Activity.httpAsyncTask417().execute();
} catch (FileNotFoundException e1) {
    e1.printStackTrace();
} catch (IOException e1) {
    e1.printStackTrace();
}

发送POST请求的部分：

public class httpAsyncTask417 extends AsyncTask<String, Void, Void> {

    @Override
    protected Void doInBackground(String... strings) {

        try {
            String url="http://172.17.57.132/post_songs";
            URL obj=new URL(url);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            //add reuqest header
            con.setRequestMethod("POST");

            String urlParameters = "content=";

            // Send post request
            con.setDoOutput(true);
            DataOutputStream wr = new DataOutputStream(con.getOutputStream());
            wr.writeBytes(urlParameters);
            wr.flush();
            wr.close();

            int responseCode = con.getResponseCode();
            Log.v("HTTPDelete_Check3", "Get returned: " + responseCode);

            BufferedReader in = new BufferedReader(
                    new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();

            //print result

        }catch(java.io.IOException ex) {

        }

        return null;
    }

    @Override
    protected void onPostExecute(Void v) {

    }
}

Answer 1

我解决了这个问题。以下是解决方案。

获取mp3文件并存储在输入流中的部分：

    //if(!DocumentsContract.isDocumentUri(this, data.getData()))
                    //    throw new RuntimeException("Not a documentsContract document");

                    try {
                        is = getContentResolver().openInputStream(data.getData());
                        uri=data.getData();
                        file_name=getFileName(uri);
                        new Main4Activity.httpAsyncTask417().execute();
                    } catch (FileNotFoundException e1) {
                        e1.printStackTrace();
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    }

发送POST请求的部分：

    try {
            String url="http://172.17.59.97/post_songs?title="+file_name;
            URL obj=new URL(url);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            //add reuqest header
            con.setRequestMethod("POST");

            // Send post request
            con.setDoOutput(true);
            DataOutputStream wr = new DataOutputStream(con.getOutputStream());
            /*BufferedReader r = new BufferedReader(new InputStreamReader(is));
            String line;
            while ((line = r.readLine()) != null) {
                wr.writeBytes(line+'\n');
            }*/
            //wr.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + uri.toString() +"\"" + "\r\n");

            byte []buffer = new byte[4096];
            int read = 0;

            while ( (read = is.read(buffer)) != -1 ) {
                wr.write(buffer, 0, read);
            }
            wr.flush();
            wr.close();

            int responseCode = con.getResponseCode();
            Log.v("HTTPDelete_Check3", "Get returned: " + responseCode);

            BufferedReader in = new BufferedReader(
                    new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();

            //print result

        }catch(java.io.IOException ex) {

        }

如何使用POST请求发送InputStream

1 个答案: