server.js

// Configuration part
var fs = require('fs');
var conf = {port : 8080};

// Server part
var connect = require('connect');
    console.log(__dirname);
console.log(process.cwd());
var app = connect.createServer(
    connect.static(process.cwd())
).listen(conf.port);
console.log('Start server on port : '+conf.port);

// Define socket part
var io   = require('socket.io');
var wsServer = io.listen(app);
wsServer.sockets.on('connection', function(socket) {
    console.log('### connection');
    socket.on('message', function(message) {
        console.log('### message: '+message);
        socket.broadcast.emit('message', message);
    });    
});


// Service for rendering adresses
var os = require('os');
var ifaces=os.networkInterfaces();
var jsonNetWork = [];
var index = 0;
for (var dev in ifaces) {
  var alias=0;
  ifaces[dev].forEach(function(details){
    if (details.family=='IPv4') {
        jsonNetWork.push({
            id: index,
            name:dev,
            ip : details.address
        });
      console.log(dev+(alias?':'+alias:''),details.address);
      index++;
      ++alias;
    }
  });
}


function writeFile(){
    console.log('Write ip file');
    fs.writeFile('./assets/json/ips.json', JSON.stringify(jsonNetWork), function(err) {
        if(err) {
            console.log(err);
        } else {
            console.log('The file was saved!');
        }
        
        console.log('Finish server loading');
    }); 
}
writeFile();