+
+ def update_cached_response(self, request, response):
+ """On a 304 we will get a new set of headers that we want to
+ update our cached value with, assuming we have one.
+
+ This should only ever be called when we've sent an ETag and
+ gotten a 304 as the response.
+ """
+ cache_url = self.cache_url(request.url)
+
+ resp = self.cache.get(cache_url)
+
+ if not resp:
+ # we didn't have a cached response
+ return response
+
+ # did so lets update our headers
+ resp.headers.update(response.headers)
+
+ # we want a 200 b/c we have content via the cache
+ request.status_code = 200
+
+ # update the request as it has the if-none-match header + any
+ # other headers that the server might have updated (ie Date,
+ # Cache-Control, Expires, etc.)
+ resp.request = request
+
+ # update our cache
+ self.cache.set(cache_url, resp)
+
+ # Let everyone know this was from the cache.
+ resp.from_cache = True
+
+ return resp