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-rw-r--r--main/middleware.py52
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diff --git a/main/middleware.py b/main/middleware.py
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index f417b545..00000000
--- a/main/middleware.py
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-# begin copy of stock Django UpdateCacheMiddleware
-# this is to address feeds caching issue which makes it horribly
-# unperformant
-
-from django.conf import settings
-from django.core.cache import cache
-from django.utils.cache import learn_cache_key, patch_response_headers, get_max_age
-
-class UpdateCacheMiddleware(object):
- """
- Response-phase cache middleware that updates the cache if the response is
- cacheable.
-
- Must be used as part of the two-part update/fetch cache middleware.
- UpdateCacheMiddleware must be the first piece of middleware in
- MIDDLEWARE_CLASSES so that it'll get called last during the response phase.
- """
- def __init__(self):
- self.cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
- self.key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
- self.cache_anonymous_only = getattr(settings, 'CACHE_MIDDLEWARE_ANONYMOUS_ONLY', False)
-
- def process_response(self, request, response):
- """Sets the cache, if needed."""
- if not hasattr(request, '_cache_update_cache') or not request._cache_update_cache:
- # We don't need to update the cache, just return.
- return response
- if request.method != 'GET':
- # This is a stronger requirement than above. It is needed
- # because of interactions between this middleware and the
- # HTTPMiddleware, which throws the body of a HEAD-request
- # away before this middleware gets a chance to cache it.
- return response
- if not response.status_code == 200:
- return response
- # Try to get the timeout from the "max-age" section of the "Cache-
- # Control" header before reverting to using the default cache_timeout
- # length.
- timeout = get_max_age(response)
- if timeout == None:
- timeout = self.cache_timeout
- elif timeout == 0:
- # max-age was set to 0, don't bother caching.
- return response
- patch_response_headers(response, timeout)
- if timeout:
- response.content = response.content
- cache_key = learn_cache_key(request, response, timeout, self.key_prefix)
- cache.set(cache_key, response, timeout)
- return response
-
-# vim: set ts=4 sw=4 et: