ASR_tangibles/emitter/backend/server.js

const express = require('express');
const { Bundle, Client } = require('node-osc');
const path = require('path');

const bodyParser = require('body-parser');
const app = express();

const oscClient = new Client('127.0.0.1', 3333);
let fseq;
const alive = [];

const server = require('http').Server(app);

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended:true}));
app.use(express.static('./frontend/assets'));

app.get('/', function (req, res) {
   res.sendFile('./frontend/index.html', { root: path.resolve(__dirname + '/..') })
});

app.post('/json', function (req, res) {
	//console.log(req.body);
	fseq = fseq ? fseq + 1 : 1;
	let oscBundle;
	if (req.body.event === 'touchend') {
		oscBundle = new Bundle(
			//[ '/tuio/2Dcur', 'source', 'touch@127.0.0.1:5001' ],
			[ '/tuio/2Dcur', 'alive' ],
			[ '/tuio/2Dcur', 'fseq', fseq ]
		);
	} else {
		//if (req.body.changedTouches && req.body.changedTouches.length && req.body.changedTouches.length > 0) {
			const touches = Object.keys(req.body.changedTouches);
			touches.forEach(touch => {
				if (!alive.includes(req.body.changedTouches[touch].identifier)) {
					alive.push(req.body.changedTouches[touch].identifier);
				}
			});
			oscBundle = new Bundle(
				//[ '/tuio/2Dcur', 'source', 'touch@127.0.0.1:5001' ],
				[ '/tuio/2Dcur', 'alive', alive.join(' ') ],
				[ '/tuio/2Dcur', 'fseq', fseq ]
			);
			touches.forEach(touch => {
				console.log(req.body.changedTouches[touch]);
				oscBundle.append(
					[
						'/tuio/2Dcur',
						'set',
						req.body.changedTouches[touch].identifier,
						req.body.changedTouches[touch].clientX / req.body.screenW,
						req.body.changedTouches[touch].clientY / req.body.screenH,
						0.0,
						0.0
					]
				);
			});
			oscClient.send(oscBundle, () => {
				res.status(200).json(JSON.stringify(req.body));
			});
		//}
	}
});

server.listen(5001, function () {
 console.log('Votre app est disponible sur localhost:5001 !')
});