Simple Node.js chat program NOT using socket.io

I am trying to learn Node and build a simple chat application. It seems like everyone uses socket.io. I would like to understand how to do this on a more fundamental level using get and post.

Basically, all I want to do is have a form that takes an input and reposts it below the form for everyone to see.

This is what I have so far:

//Requirements
var express = require('express'); 
var app = express(); 

//GET
app.get('/', function (req, res) {
 // res.send('Hello World!');
        var response =
          "<HEAD>"+
                  "<title>Chat</title>\n"+
          "</HEAD>\n"+
          "<BODY>\n"+
                    "<FORM action=\"/\" method=\"get\">\n" +
                            "<P>\n" +
                                   "Enter a phrase: <INPUT type=\"text\" name=\"phrase\"><BR>\n" +
                                   "<INPUT type=\"submit\" value=\"Send\">\n" +
                           "</P>\n" +
                   "</FORM>\n" +
          "<P>phrase</P>\n"+
          "</BODY>";
        var phrase = req.query.phrase;
        if(!phrase){
                res.send(response);
        }else{
                res.send(response);
                res.send(phrase);
        }
});

//For testing
app.get('/test', function(req, res){
        res.send('I am a robot');
        console.log('told visiter I am a robot');
});

//Run the app
var server = app.listen(8080, function () {
  var host = server.address().address;
  var port = server.address().port;

  console.log('App listening at http://%s:%s', host, port);
});

I've been trying a bunch of things, but I am pretty stumped.

Did you hear about messaging backend jxm.io?

It works with JXcore (open sourced fork of Node.JS). JXM itself is an open source project, which you can find on github: jxm.

It's really fast and efficient, you can check some tutorials. For example, below is minimal code, that you need to run on server-side:

var server = require('jxm');
server.setApplication("Hello World", "/helloworld", "STANDARD-KEY-CHANGE-THIS");
server.addJSMethod("serverMethod", function (env, params) {
   server.sendCallBack(env, params + " World!");
});
server.start();

The client's part can be found here: Browser Client (JavaScript)

JXM also supports Java clients (runs on android) and node clients.