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Я пытаюсь получить API-речевой указатель V1, работающий с моим java-клиентом, но я думаю, что у меня что-то не хватает, поскольку я не могу получить ответ от AVS для моего запроса POST , Ниже приведен фрагмент кода.Ответ Alexa Voice Service возвращает 0 байт для API-речевого распознавателя V1
Надеясь, что кто-то может указать на мою ошибку.
Вот главная функция для моего приложения:
public class App
{
private static String requestURL = "https://access-alexa-na.amazon.com/v1/avs/speechrecognizer/recognize";
public static void main(String[] args)
{
try {
MultipartUtility mpu = new MultipartUtility(requestURL, "UTF-8", AvsRequest.getToken(), AvsRequest.getBoundary());
mpu.addRequestStart();
mpu.addData("tts_hello_how_are_you_doing_today.wav");
mpu.addRequestEnd();
mpu.finish();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Это метод утилита для тела запроса:
public class AvsRequest {
private static final String BOUNDARY = "BOUNDARY1234";
private static final String BOUNDARY_DASHES = "--";
private static final String NEWLINE = "\r\n";
private static final String METADATA_CONTENT_DISPOSITION = "Content-Disposition: form-data; name=\"metadata\"";
private static final String METADATA_CONTENT_TYPE="Content-Type: application/json; charset=UTF-8";
private static final String AUDIO_CONTENT_TYPE="Content-Type: audio/L16; rate=16000; channels=1";
private static final String AUDIO_CONTENT_DISPOSITION="Content-Disposition: form-data; name=\"audio\"";
private static final String METADATA="{\"messageHeader\": {\"deviceContext\":[{\"name\":\"playbackState\", \"namespace\":\"AudioPlayer\", \"payload\":{\"streamId\":\"\", \"offsetInMilliseconds\":\"0\", \"playerActivity\":\"IDLE\"}}]},\"messageBody\": {\"profile\": \"alexa-close-talk\",\"locale\": \"en-us\",\"format\": \"audio/L16; rate=16000; channels=1\"}}";
private static final String TOKEN = "Atza|I....";
public static String getRequestStart(){
StringBuilder str = new StringBuilder();
str.append(BOUNDARY_DASHES);
str.append(BOUNDARY);
str.append(NEWLINE);
str.append(METADATA_CONTENT_DISPOSITION);
str.append(NEWLINE);
str.append(METADATA_CONTENT_TYPE);
str.append(NEWLINE);
str.append(NEWLINE);
str.append(METADATA);
str.append(NEWLINE);
str.append(NEWLINE);
str.append(BOUNDARY_DASHES);
str.append(BOUNDARY);
str.append(NEWLINE);
str.append(AUDIO_CONTENT_DISPOSITION);
str.append(NEWLINE);
str.append(AUDIO_CONTENT_TYPE);
str.append(NEWLINE);
return str.toString();
}
public static String getRequestEnd(){
StringBuilder str = new StringBuilder();
str.append(NEWLINE);
str.append(NEWLINE);
str.append(BOUNDARY_DASHES);
str.append(BOUNDARY);
str.append(BOUNDARY_DASHES);
str.append(NEWLINE);
return str.toString();
}
public static String getBoundary() {
return BOUNDARY;
}
public static String getToken() {
return TOKEN;
}
}
И это многосекционный класс запроса:
public class MultipartUtility {
private HttpURLConnection httpConn;
private String charset;
private OutputStream outputStream;
private PrintWriter writer;
private String oauth2Token;
private URL url;
public MultipartUtility(String requestURL, String charset, String token, String boundary) throws IOException {
this.charset = charset;
this.oauth2Token = token;
this.url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setDoOutput(true);
httpConn.setRequestProperty("Authorization", "Bearer " +token);
httpConn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),false);
}
public void addRequestStart(){
writer.append(AvsRequest.getRequestStart());
writer.append("Content-Transfer-Encoding: binary").append("\r\n");
System.out.println("POST REQUEST START: \n" + AvsRequest.getRequestStart());
}
public void addData(String fileName) throws IOException{
FileInputStream inputStream = new FileInputStream(fileName);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
writer.write(buffer.toString());
}
writer.flush();
inputStream.close();
}
public void addRequestEnd(){
writer.append(AvsRequest.getRequestEnd());
System.out.println("POST REQUEST END: " +AvsRequest.getRequestEnd());
writer.flush();
writer.close();
}
public void finish1() throws IOException {
InputStream response = null;
try {
writer.close();
response = httpConn.getInputStream();
System.out.println("Response Size:\n"+ response.available());
OutputStream fos = new FileOutputStream(new File("response.txt"));
BufferedReader reader = new BufferedReader(new InputStreamReader(response));
String line = null;
while ((line = reader.readLine()) != null) {
fos.write(line.getBytes());
fos.flush();
}
reader.close();
fos.close();
httpConn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}