api ai tutorial

var Client                = require('castv2-client').Client; var Youtube               = require('youtube-castv2-client').Youtube; var mdns                  = require('mdns'); //var browser = mdns.createBrowser(mdns.tcp('googlecast')); var sequence = [     mdns.rst.DNSServiceResolve(),     'DNSServiceGetAddrInfo' in mdns.dns_sd ? mdns.rst.DNSServiceGetAddrInfo() : mdns.rst.getaddrinfo({families:[4]}),     mdns.rst.makeAddressesUnique() ]; var browser = mdns.createBrowser(mdns.tcp('googlecast'), {resolverSequence: sequence}); browser.on('serviceUp', function(service) {   console.log('found device "%s" at %s:%d', service.name, service.addresses[0], service.port);   ondeviceup(service.addresses[0]);   browser.stop(); }); browser.start(); function ondeviceup(host) {   var client = new Client(); ...