Forward HttpRequest from Java WebApp on Tomcat to EasyRTC deployed on NodeJS

I am trying to make communication between A simple Servlet deployed in Java web application and the demo html file provided in easyRTC which has video+audio enabled. I pass one parameter from Java application to NodeJS as HttpRequest and using that parameter I can communicate over video+audio between nodeJS application and my Java Application.

My Servlet Code:

URL url = new URL("http://localhost:3000/demos/read_post_audio_video.html");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");

String urlParameters = "id=" + URLEncoder.encode("123456", "UTF-8");

DataOutputStream wr = new DataOutputStream (connection.getOutputStream ());
wr.writeBytes (urlParameters);
wr.flush ();
wr.close ();

if(connection.getResponseCode() == 200){
   InputStream is = connection.getInputStream();
   copyStream(is, response.getOutputStream());
}

I have copyStream as:

public static void copyStream(InputStream input, OutputStream output)
throws IOException
{
    byte[] buffer = new byte[1024]; // Adjust if you want
    int bytesRead;
    while ((bytesRead = input.read(buffer)) != -1)
    {
        output.write(buffer, 0, bytesRead);
    }
}

On NodeJS (easyRTC) Server side, I am trying to get the data from received POST request. and display it on html page. NodeJS is running on port 3000.

var express = require('./node_modules/express');
var app = express.createServer();
app.use (function(req, res, next) {

   var data='';
   req.setEncoding('utf8');
   req.on('data', function(chunk) { 
       data += chunk;
    });

    req.on('end', function() {
        req.body = data;
        next();
    });
});

app.post('/', function(req, res)
{
    console.log(req.body);
});
app.listen(3000);

Here I want to pass the urlParameters that is id to NodeJS url, and display the received id onto the html page. Once this ID is received at NodeJS Server side, I want to make communication between them for easyrtc video+audio.