How to stream bytes received from socket to a file

File-streaming-handler.java

InputStream requestStream = httpExchange.getRequestBody();
File targetFile = new File("/Users/hasitha/temp/file-streaming/targetFile/targetFile.mkv");
OutputStream outStream = null;
try {
    outStream = new FileOutputStream(targetFile);

    byte[] buffer = new byte[8 * 1024];
    int bytesRead;
    while ((bytesRead = requestStream.read(buffer)) != -1) {
        outStream.write(buffer, 0, bytesRead);
        outStream.flush();
    }
} finally {
    if(outStream != null) {
        outStream.close();
    }
}