Add example for YouTube communication

[WeeJeWel]

Great library, and heavily documented! However I can't seem to get YouTube to work. Launching the app works, but actually sending a video doesn't seem to do anything. My (pretty ugly) code is as follows:

var Client = require('castv2').Client;
var mdns = require('mdns');

var browser = mdns.createBrowser(mdns.tcp('googlecast'));

browser.on('serviceUp', function(service) {
  console.log('found device %s at %s:%d', service.name, service.addresses[0], service.port);

  if( service.name === 'Chromecast-691672b72f7f6dcc5584dc30d70xxxxx' ) {
    ondeviceup(service.addresses[0]);
  }

  browser.stop();
});

browser.start();

function ondeviceup(host) {

  var client = new Client();
  client.connect(host, function() {
    // create various namespace handlers
    var connection = client.createChannel('sender-0', 'receiver-0', 'urn:x-cast:com.google.cast.tp.connection', 'JSON');
    var heartbeat  = client.createChannel('sender-0', 'receiver-0', 'urn:x-cast:com.google.cast.tp.heartbeat', 'JSON');
    var receiver   = client.createChannel('sender-0', 'receiver-0', 'urn:x-cast:com.google.cast.receiver', 'JSON');
    var media           = client.createChannel('sender-0', 'receiver-0', 'urn:x-cast:com.google.cast.media', 'JSON');

    // establish virtual connection to the receiver
    connection.send({ type: 'CONNECT' });

    // start heartbeating
    setInterval(function() {
      heartbeat.send({ type: 'PING' });
    }, 5000);

    // launch YouTube app
    receiver.send({ type: 'LAUNCH', appId: 'YouTube', requestId: 1 });

    // display receiver status updates
    receiver.on('message', function(data, broadcast) {

        console.log(data)
        if( data.status.applications ) {
            data.status.applications.forEach(function(app){
                if( app.appId !== 'YouTube' ) return;

                console.log(app.sessionId);

                var connection = client.createChannel('sender-0', app.sessionId, 'urn:x-cast:com.google.cast.tp.connection', 'JSON');
                    connection.send({ type: 'CONNECT' });

                var yt = client.createChannel('sender-0', app.sessionId, 'urn:x-cast:com.google.youtube.mdx', 'JSON');
                    yt.send({
                        type: 'flingVideo',
                        data: {
                          currentTime: 0,
                          videoId: 'JMl8cQjBfqk'
                        },
                        requestId: 1
                    });
            })
        }

    });

  });

}

How would one play a YouTube video using this library?

[thibauts]

It will probably be easier to use castv2-client with castv2-youtube.

[WeeJeWel]

I've found castv2-youtube unstable in many scenarios. I assume it shouldn't be that hard to write up an example, right? Or is some fundamental concept missing in this llibrary that makes it harder than I can foresee?

[thibauts]

castv2-youtube is the example you're looking for. I could not do it better if I wanted to. If you have stability issues with it, you may want to file issues on its repo.

Honestly it's the best you, me, or anybody else can do.

[WeeJeWel]

Alright, thanks!