debug_server.js

Meteor.Debug.clients = 0;
Meteor.Debug.logs = new Meteor.Collection(null);

Meteor.Debug.toArray = function(obj){
  var arr = [];
  for (var i in obj){
    arr.push(obj[i]);
  }
  return arr;
};

Meteor.Debug.broadcast = function(method){
  var args = this.toArray(arguments);
  args.shift();

  if (Meteor.Debug.clients > 0){
    Meteor.Debug.logs.update({id : "0"}, {$set : {method : method, data: args}});
  }
  else{
    console[method].apply(console, args);
  }
};

Meteor.Debug.log = function(){
  var args = this.toArray(arguments);
  args.unshift("log");
  this.broadcast.apply(this, args);
};

Meteor.Debug.warn = function(){
  var args = this.toArray(arguments);
  args.unshift("warn");
  this.broadcast.apply(this, args);
};

Meteor.Debug.info = function(){
  var args = this.toArray(arguments);
  args.unshift("info");
  this.broadcast.apply(this, args);
};

Meteor.Debug.logs.insert({id : "0"});

Meteor.publish("remote-debug", function() {
  Meteor.Debug.clients++;

  this.onStop(function(){
    Meteor.Debug.clients--;
  });

  var self = this;
  Meteor.Debug.logs.find({id : "0"}).observeChanges({
    added : function(id, fields){
      self.added("remote-debug", id, fields);
    },
    changed : function(id, fields){
      self.changed("remote-debug", id, fields);
    }
  });
});