Django - Javascript - Disable cache on image refresh

Question

I use, in my template, the following javascript to refresh an image:

<script type='text/javascript'>
$(document).ready(function() {
    var $img = $('#imageactual');
    setInterval(function() {
        $.get('{{ MEDIA_URL }}{{ data_to_modify.thumbnail.name }}?cachebuster='+Math.floor(Math.random()*100 +1), function(data) {
            var $loader = $(document.createElement('img'));
            $loader.one('load', function() {
                $img.attr('src', $loader.attr('src'));
            });
            $loader.attr('src', data);
            if($loader.complete) {
                $loader.trigger('load');
            }
        });
    }, 2000);
});
</script>

And I display the image with the following html code:

<img  id="imageactual" src="{{ MEDIA_URL }}{{ data_to_modify.thumbnail.name }}" />

In my view I added

@never_cache
@cache_control(max_age=0, no_cache=True, no_store=True, must_revalidate=True)

and

    response = render(request, 'mainsite/modify.html', locals(), context_instance=RequestContext(request))   
    response['Cache-Control'] = 'no-store, no-cache, must-revalidate proxy-revalidate'
    response['Expires'] = 'Thu, 01 Jan 1970 00:00:00 GMT'
    response['Pragma'] = 'no-cache'
    return response

But the image is still caching in the browser (Chrome: Version 35.0.1916.153 m)... Do you have any idea how to avoid this?

EDIT 1:

**Header:**

Remote Address:127.0.0.1:80
Request URL:http://127.0.0.1/medias/thumbs/odbgelguelteeglndjssastj.jpg
Request Method:GET
Status Code:200 OK (from cache)

Answer 1

As @yedpodtrzitko pointed out, adjusting the cache headers of the web page in Django is pointless.

This part looks wrong:

$.get('{{ MEDIA_URL }}{{ data_to_modify.thumbnail.name }}?cachebuster='+Math.floor(Math.random()*100 +1), function(data) {

{{ MEDIA_URL }}{{ data_to_modify.thumbnail.name }} is the url of of the image you want to display right? (you use the same url in the html img tag)

In that case it doesn't make sense to load that url via ajax.

It seems like you don't need ajax at all, you just need to periodically update the src attribute of the img tag, with the cachebuster querystring appended:

<script type='text/javascript'>
$(document).ready(function() {
    var $img = $('#imageactual');
    setInterval(function() {
        $img.attr('src', '{{ MEDIA_URL }}{{ data_to_modify.thumbnail.name }}?cachebuster='+Math.floor(Math.random()*100 +1));
    }, 2000);
});
</script>