Hello @kartik,
You can do by using a custom middleware, even though knowing that the best option is using the tested approach of the package django-cors-headers. With that said, here is the solution:
Create the following structure and files:
-- myapp/middleware/__init__.py
from corsMiddleware import corsMiddleware
-- myapp/middleware/corsMiddleware.py
class corsMiddleware(object):
    def process_response(self, req, resp):
        resp["Access-Control-Allow-Origin"] = "*"
        return resp
add to settings.py the marked line:
MIDDLEWARE_CLASSES = (
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    # Now we add here our custom middleware
     'app_name.middleware.corsMiddleware' <---- this line
)
Hope it works!!
Thank You!!