Using SockJS in Meteor to connect to external service or stream API - meteor

Question

I am trying to use SockJS from my Meteor to connect to another service but I can't get a reference to SockJS within meteor client or server. Does anyone have a good example of using SockJS to connect to other service or streaming API's from Meteor?
I have tried to accomplish this two ways but 'socket' is always undefined:
var socket = sockjs.createServer({ sockjs_url: 'http://api.hitbtc.com:8081' });
socket.onmessage = function(msg) {
var data = JSON.parse(msg.data);
console.log("CONNECTED!!" + data)
};
var socket = new SockJS('http://api.hitbtc.com:8081');
socket.onmessage = function(msg) {
var data = JSON.parse(msg.data);
console.log("CONNECTED!!" + data)
};

Answer 1

Even though SockJS is used by the Meteor itself it's hidden deeply inside the ddp package and it's not really exposed to the users. So basically, you have two options here:
You can either put another copy of SockJS into your app, ...
... or you can teach your custom server to understand DDP protocol, then you will be able to use DDP.connect to establish a new connection.
The second solution does not make sense of course if you are using 3rd party service. The first solution feels ugly because of the data redundancy, but I am afraid it's the only way out if 2. is not acceptable.

Answer 2

In the server:
execute Npm.require('./') and observe the path informed in the error, from it you can point to the packages from the depths of Meteor, in the case of SockJS the path (in version 1.10.2 of Meteor) is:
Npm.require('./meteor/ddp-server/node_modules/sockjs');
In the specific case of Sockjs, its use is slightly different from that presented on the Github page, as follows:
const sockjs = Npm.require('./meteor/ddp-server/node_modules/sockjs');
const echo = sockjs.listen(WebApp.httpServer, {prefix: '/echo'});
echo.on('connection', function(conn) {
conn.on ('data', function(message) {
conn.write(message);
});
conn.on('close', function(){});
});
I didn't find the sockjs "client" package in these files, because the sockjs-client package is specific to the browser. So I downloaded from the CDN that the "echo" output provided, I use "--exclude-archs web.browser.legacy" in my test environment, but from what I read out there the sockjs-client package is available if you don't use it this parameter.
Sockjs relies on "faye-websocket" which has both a client and a websocket server designed to run on NodeJs, here is the suggestion.
Ps: I didn't find an equivalent form on the client side (there is no Npm.require)