Thread: Streaming microphone audio to HTTP Client

Hello,

I would like to stream the audio of the microphone connected with my Raspberry Pi over a Java webserver to connected webbrowsers. Unfortunately, I don't think that something like this could work:

   public HTTPServer(Socket client, TargetDataLine microphone) {
        this.client = client;
        this.microphone = microphone;
    }
 
    public void run() {
        try {
            System.out.println("The Client " + client.getInetAddress() + ":" + client.getPort() + " is connected");
            output = new DataOutputStream(client.getOutputStream());
 
            sendResponse();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public void sendResponse() throws Exception {
        int bufferSize = microphone.getBufferSize() / 5;
        bufferSize += 512;
 
        String statusLine = "HTTP/1.1 200 OK\r\n";
        String serverDetails = "Server: HTTP-Server\r\n";
        String contentTypeLine = "Content-Type: audio/mpeg\r\n";
        String contentLengthLine = "Content-Length: " + bufferSize + "\r\n";
 
        output.writeBytes(statusLine);
        output.writeBytes(serverDetails);
        output.writeBytes(contentTypeLine);
        output.writeBytes(contentLengthLine);
        output.writeBytes("\r\n");
 
        int numBytesRead;
 
        microphone.open();
        microphone.start();
 
        byte[] targetData = new byte[bufferSize];
 
        while (true) {
            numBytesRead = microphone.read(targetData, 0, targetData.length);
 
            if (numBytesRead == -1) break;
            output.write(targetData, 0, numBytesRead);
            output.flush();
        }
    }

        ServerSocket server = null;
        try {
            server = new ServerSocket(8888);
        } catch (IOException e) {
            e.printStackTrace();
        }
 
        AudioFormat format = getAudioFormat();
 
        DataLine.Info micInfo = new DataLine.Info(TargetDataLine.class, format);
        TargetDataLine mic = null;
        try {
            mic = (TargetDataLine) AudioSystem.getLine(micInfo);
        } catch (LineUnavailableException e) {
            e.printStackTrace();
        }
 
        System.out.println("TCPServer Waiting for client on port 8888");
 
        while (true) {
            Socket connected = null;
            try {
                connected = server.accept();
            } catch (IOException e) {
                e.printStackTrace();
            }
            new HTTPServer(connected, mic).start();
        }

Is there a library which allows something like this?

I'm looking for the same thing! Did you have any luck finding such a library?