adapter.py

class ConnectionRefusedCacheControlAdapter(CacheControlAdapter):

    def send(self, request, **kw):

        try:
            resp = super(ConnectionRefusedCacheControlAdapter, self).send(request, **kw)
        except Exception as e:
            cache_url = self.controller.cache_url(request.url)
            cache_data = self.controller.cache.get(cache_url)
            cached_response = self.controller.serializer.loads(request, cache_data)
            return self.build_response(request, cached_response, from_cache=True)

        return resp