add_post_render_callback

add_post_render_callback.py

if timeout:
    cache_key = learn_cache_key(request, response, timeout, self.key_prefix, cache=self.cache)
    # Ensure the template is literally rendered. Cause if you are using TemplateResponse. The rendering doesn't happen
    # Until it reach the bottom of response middleware
    # Actually it happens in django wsgi handler which lives at django/core/handlers/base.py
    if hasattr(response, 'render') and callable(response.render):
        response.add_post_render_callback(
            lambda r: self.cache.set(cache_key, r, timeout)
        )
    else:
        self.cache.set(cache_key, response, timeout)