Access-Control-Allow-Origin in Django app

I’m developing a Phonegap app for my Django based app, but when trying to make Ajax calls I get this error:

XMLHttpRequest cannot load http://domain.herokuapp.com/getcsrf/?tags=jquery%2Cjavascript&tagmode=any&format=json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. 

How can I make it so my Django app allows cross origin for some urls?

Here’s my Ajax code:

get: function() {
    $.getJSON("http://domain.herokuapp.com/getcsrf/",
    {
        tags: "jquery,javascript",
        tagmode: "any",
        format: "json"
    },
    function(data) {
        $.each(data.items, function(item){
            console.log(item);
            });
    });
}

Answer

Django by default does not provide the headers necessary to provide cross origin. The easiest way would be to just use this Django app that handles it for you: https://github.com/adamchainz/django-cors-headers

• Add to installed apps
• Add to middleware
• Then stuff like…

CORS_ALLOWED_ORIGINS = [
    "http://read.only.com",
    "http://change.allowed.com",
]

to support allowing all, just use the setting… CORS_ALLOW_ALL_ORIGINS = True and then do any filtering of the request in middleware or in the view.