Asynchronous code in Meteor server?

Question

Node.js

Hey! Started making the first application on Meteor. I immediately decided to go beyond the boundaries of ordinary business card sites.
On the server side, there is some kind of daemon - a code that must constantly spin and do something (for example, receive messages from the VK API through long polling).
When I try to make an HTTP.post, I get an error saying Meteor code must always run within a Fiber. Try wrapping callbacks that you pass to non-Meteor libraries with Meteor.bindEnvironment.
Googled it, didn't find anything useful (and yes, I've seen SO).
Tell me where to read about asynchronous code on the server or the right way to write something like that.

this.World = function() {
  this.vk = new VK({ appId: 777, mode: 'oauth' });
  this.vk.token = '#token';

  this.viewFriends(5);
  this.listenMessages();
};

this.World.prototype = {
  viewFriends: function(time) {
    var vk = this.vk;

    setInterval(function() {
      var list = vk.request('friends.getRequests', { extended: 0 }, function(data) {
        data.response.forEach(function(id) {
          vk.request('friends.add', { user_id: id }, function() {
            vk.request('messages.send', {
              user_id: id,
              message: 'Привет, новый друг!'
            }, function(res) {
              console.log(res);
            })
          });
        });
      })
    }, 1000 * 60 * time);
  },
  listenMessages: function() {
    var vk = this.vk;

    vk.request('messages.getLongPollServer', {}, function (data) {
      data = data.response;
      var url = ['http://', data.server, '?act=a_check&key=', data.key, '&ts=', data.ts, '&wait=25&mode=2']

      HTTP.post(url.join(''), Meteor.bindEnvironment(function(err, data) {
        console.log(123);
      }));
    });
  }
}

Answer 1

Started using node-sync lib.

Answer 2

Well told here .