Django web app reaching rest api and CORS problem

I have a django app and at the template part i have javascript function calling the rest api:

<!-- Custom Theme JavaScript -->
	<script src="/static/js/select-autofiller.js"></script>

At the js file i am filling a select box according to the returned json response

$('#field1').change(function(){

var var1=$("#filed2").val();
var var2=$("#field1 option:selected").text();


url="http://www.foo.com:8080/" + var1 + "/" + var2 + "/";


$.get(url, function( data ) {
  alert( "Load was performed." + data);
});



});

The Django web app is running on www.foo.com:8000

At the rest api side, falcon is running and i installed falcon-cors

import falcon

from wsgiref import simple_server

from falcon_cors import CORS


check_python()

cors = CORS(allow_origins_list=settings.ALLOWED_ORIGINS)

api = falcon.API(
        media_type='application/json',
        middleware=[
            # json.RequireJSON(),
            # json.JSONTranslator(),
            https.RequireHTTPS(),
            headers.BaseHeaders(),
            handle_404.WrongURL(),
            cors.middleware
        ],
    )

***
route definitions
****

httpd = simple_server.make_server('0.0.0.0', 8080, api)
httpd.serve_forever()

ALLOWED_ORIGINS is a list: ['www.foo.com:8000', 'www.foo.com:8080']

Still when i select the box and triggered the js at the Django web app, i am getting 

XMLHttpRequest cannot load http://www.foo.com:8080/var1/var2. Response to preflight request doesn't pass access control check: 
No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://www.foo.com:8000' is therefore not allowed access. The response had HTTP status code 400.

I couldn't find ow to fix it. 
Any idea?

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