node-red-contrib-mog/server/browser.js

mog

var mdns = require('mdns');
var fs = require('fs');

var browser = mdns.createBrowser(mdns.tcp('nmos-node'));

console.log("Browser listenning...");

var obj = {
  services: []
};

fs.writeFile('available-devices.json', JSON.stringify(obj), 'utf8', function (err) {
  if (err) throw err;
  console.log('Database initialized');
});


browser.on('serviceUp', function(service) {
  console.log("service up: ", service);
  
  //depois posso configurar aqui mais ou menos informaçao acerca dos serviços
  var s = { interfaceIndex: service.interfaceIndex, 
      typeName: service.type.name,
      protocol: service.type.protocol,
      subtypes: service.type.subtypes,
      fullyQualified: service.type.fullyQualified,
      replyDomain: service.replyDomain,
      flags: service.flags,
      name: service.name,
      networkInterface: service.networkInterface,
      fullname: service.fullname,
      host: service.host,
      port: service.port,
      addresses: service.addresses 
  };

  obj.services.push(s);
  var json = JSON.stringify(obj);
  fs.writeFile('available-devices.json', json, 'utf8', function (err) {
    if (err) throw err;
    console.log('Saved!');
  });
});

browser.on('serviceDown', function(service) {
  console.log("service down: ", service);

  for(var i = 0; i < obj.services.length; i++) {
      if(obj.services[i].interfaceIndex == service.interfaceIndex) {
          obj.services.splice(i, 1);
          break;
      }
  }

  var json = JSON.stringify(obj);
  fs.writeFile('available-devices.json', json, 'utf8', function (err) {
    if (err) throw err;
    console.log('Saved!');
  });
});

browser.on('error', function(error) {
    //console.log("Ups!");
});

browser.start();