controllers.js

 app.controller( 'AppCtrl', function ($scope, socket) {
    socket.onopen(
        function(){
            console.log('Socket is connected :D')
        }
    )
    socket.onclose(
        function(){
            console.log('Socket is disconnected :(')
        }
    )
})

services.js

app.value('version', '0.1').factory( 'socket' , function($rootScope) {
    var port = (location.port != 80) ? ':'+location.port : ''
    var socket = new WebSocket('ws://'+document.domain+''+port+'/socket')
    var methods = 
        { onopen:
            function(callback) {
                socket.onopen = function(){
                    var args = arguments;
                    $rootScope.$apply(function(){ callback.apply(socket,args) })
                }
            }
        , onmessage:
            function(data, callback) {
                socket.onmessage = function(data){
                    var args = arguments;
                    $rootScope.$apply(function(){ callback.apply(socket,args) })
                }
            }
        , onclose:
            function(callback) {
                socket.onclose = function(){
                var args = arguments;
                $rootScope.$apply(function(){ callback.apply(socket,args) })
            }
        }
    }
    return methods
})