Bing Speech API giving error with JAVA code - microsoft-cognitive

Question

I am trying to use Bind Speech Rest API from Java service but every time I am getting 408 response code.
java.io.IOException: Server returned HTTP response code: 408 for URL: https://speech.platform.bing.com/speech/recognition/conversation/cognitiveservices/v1?language=en-US
I have tried calling REST API using diffrent methods but all the time, error is 408 Request time out.
Whereas I created a .net sample with similar code of calling Speech REST API, it is working.
Is there any way to diagnose what I am missing in my Java code ?
Here is my JAVA code
DataOutputStream dos = null;
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1024; // 1024*1024 = 1MB. 212144 is a quarter MB.
FileInputStream fileInputStream = null;
fileInputStream = new FileInputStream(new File("D://hello.wav"));
URL url = new URL("https://speech.platform.bing.com/speech/recognition/conversation/cognitiveservices/v1?language=en-US");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//method
conn.setRequestMethod("POST");
conn.setRequestProperty("Transfer-Encoding", "chunked");
conn.setRequestProperty("Accept","application/json;text/xml");
conn.setRequestProperty("Host","speech.platform.bing.com");
//header
conn.setRequestProperty("content-length", String.valueOf(fileInputStream.available()));
conn.setRequestProperty("Content-Type", "audio/wav; codec=\"audio/pcm\"; samplerate=16000;");
conn.setRequestProperty("Authorization", "Bearer "+ token );
conn.setReadTimeout(22222230);
conn.setDoOutput(true);
conn.connect();
dos = new DataOutputStream(conn.getOutputStream());
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
try {
dos.write(buffer, 0, bufferSize);
} catch (OutOfMemoryError oome) {
oome.printStackTrace();
fileInputStream.close();
throw new Exception("Out Of Memory!");
}
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
fileInputStream.close();
dos.flush();
dos.close();
BufferedReader in = new BufferedReader(
new InputStreamReader(
conn.getInputStream()));
String decodedString;
while ((decodedString = in.readLine()) != null) {
System.out.println(decodedString);
}

Answer 1

The Bing Speech API wants chunked transfer of the audio data. For the HttpURLConnection class, though, setting the Transfer-Encoding header does not magically cause the transfer type to switch -- you need to set the streaming mode explicitly through the setChunkedStreamingMode or one of its variants. You'll also want to omit the Content-Length header.
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//method
conn.setRequestMethod("POST");
conn.setChunkedStreamingMode(0);
//header
conn.setRequestProperty("Accept","application/json;text/xml");
conn.setRequestProperty("Content-Type", "audio/wav; codec=\"audio/pcm\"; samplerate=16000;");
conn.setRequestProperty("Authorization", "Bearer "+ token );