I am trying to print a json that this broker on my server, but i can not return the json, the chorme me of the following error:

XMLHttpRequest can not load .... Origin null is not allowed by Access-Control-Allow-Origin.

can someone help me?

the following code:`

Code:
console.log("carregando..");
var username = "admin";
var password = "password";
$.ajax({

   type: 'GET',
    url: 'http://localhots/api/json/broker/dest-metrics',
    dataType: 'json',
    headers : {Accept : "application/json","Access-Control-Allow-Origin" : "*"},
    beforeSend : function(req) {
                                    req.setRequestHeader('Authorization', "Basic " +Base64.encode(username+":"+password))
                                    console.log("Autenticado!!");
    },
    success: function(data) { console.log("Sucesso!!"); },
    error: function (data) {
              console.log("ERRO");
         },
    data: {},
   async: false,
   cache: false,
   jsonp: true 



});`