Browsing all mDNS / dns-sd services with NodeJS

mdns-browse-all.js

/*jshint strict:true node:true es5:true onevar:true laxcomma:true laxbreak:true eqeqeq:true immed:true latedef:true*/
(function () {
  "use strict";

  var mdns = require('mdns')
    ;

  function create() {
    var browser
      , browsers = {}
      , stuffs = {}
      ;

    browser = mdns.browseThemAll();

    browser.on('serviceUp', function (record) {
      var srv = record.type.name
        , br
        ;

      if (browsers[srv]) {
        return;
      }

      stuffs[srv] = {};
      br = browsers[srv] = mdns.createBrowser(mdns[record.type.protocol](srv));
      br.on('serviceUp', function (rec) {
        stuffs[srv][rec.name] = rec;
        console.log(rec);
      });
      br.on('serviceDown', function (rec) {
        delete stuffs[srv][rec.name];
      });
      br.start();
      console.log(record.interfaceIndex, record.type.protocol, record.type.name);
    });

    browser.on('serviceDown', function (record) {
      var br = stuffs[record.type.name]
        ;

      if (!br) {
        return;
      }

      br.stop();

      delete stuffs[record.type.name];
    });
    browser.start();

    function handler(req, res, next) {
      //res.json(stuffs);
      res.end(JSON.stringify(stuffs, function (keyname, val) {
        console.log(arguments);
        if (/raw/.exec(keyname)) {
          return;
        }

        return val;
      }, '  '));
    }

    return handler;
  }

  if (module === require.main) {
    var connect = require('connect')
      ;
    
    connect.createServer().use(create()).listen(9090);
    setInterval(function () {}, 60 * 1000);
  }
  
}());