Failing to get response from local Grizzly server using jQuery GET request in Brackets IDE preview

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I've created a local HTTP server using Java Grizzly, with the basic structure:

public static void main(String[] args) throws IOException {
    Converter.register(); //local register

    final HttpServer server = startServer();
    System.out.println(String.format("Jersey app started with WADL available at "
            + "%sapplication.wadl\nHit enter to stop it...", BASE_URI));
    System.in.read();
    server.shutdown();

}

When I run a GET request on a local browser, everything is fine:

enter image description here

But when I try to do it with jQuery $.get() (using Brackets IDE Live Preview), it fails:

  function getRequest(){
    var apiString = buildRequest();
    $.get("http://localhost:8080/concord/webapi/from/dna/chr/10/strand/1/52500001..52567500/to/rna",function(r){
      $('#outputPanel').text(r);
    })
    .fail(function(err){
      // WHY THIS FAILS ?!?!
      console.log(err);
    });

  }

I can see in the Console that I get the following error:

XMLHttpRequest cannot load http://localhost:8080/concord/webapi/from/dna/chr/10/strand/1/52500001..52567500/to/rna. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:61484' is therefore not allowed access. 

When I call for a remote response (e.g. github api) it works. I'm looking for any suggestions, thx.

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