Add to urls.py:
urlpatterns += patterns('',
    url(r'^media\/(?P<path>.*)$', 'views.media_xsendfile', {
        'document_root': settings.MEDIA_ROOT,
    }),
)


Add to views.py:
from django.conf import settings
from django.http import HttpResponse
from django.contrib.admin.views.decorators import staff_member_required

@staff_member_required
def media_xsendfile(request, path, document_root):
    response = HttpResponse()
    response['Content-Type'] = ''
    response['X-Sendfile'] = (os.path.join(settings.MEDIA_ROOT, path)).encode('utf-8')
    return response