diff options
Diffstat (limited to 'feeds.py')
| -rw-r--r-- | feeds.py | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -1,4 +1,5 @@ import datetime +from decimal import Decimal, ROUND_HALF_DOWN from django.contrib.syndication.views import Feed from django.core.cache import cache @@ -14,6 +15,17 @@ CACHE_TIMEOUT = 1800 CACHE_PACKAGE_KEY = 'cache_package_latest' CACHE_NEWS_KEY = 'cache_news_latest' +def utc_offset(): + '''Calculate the UTC offset from local time. Useful for converting values + stored in local time to things like cache last modifed headers.''' + timediff = datetime.datetime.utcnow() - datetime.datetime.now() + secs = timediff.days * 86400 + timediff.seconds + # round to nearest minute + mins = Decimal(secs) / Decimal(60) + mins = mins.quantize(Decimal('0'), rounding=ROUND_HALF_DOWN) + return datetime.timedelta(minutes=int(mins)) + + def retrieve_package_latest(): # we could break this down based on the request url, but it would probably # cost us more in query time to do so. @@ -23,6 +35,7 @@ def retrieve_package_latest(): try: latest = Package.objects.values('last_update').latest( 'last_update')['last_update'] + latest = latest + utc_offset() cache.set(CACHE_PACKAGE_KEY, latest, CACHE_TIMEOUT) return latest except Package.DoesNotExist: @@ -35,6 +48,7 @@ def refresh_package_latest(**kwargs): # thread. Update it instead. latest = Package.objects.values('last_update').latest( 'last_update')['last_update'] + latest = latest + utc_offset() cache.set(CACHE_PACKAGE_KEY, latest, CACHE_TIMEOUT) def package_etag(request, *args, **kwargs): @@ -108,6 +122,7 @@ def retrieve_news_latest(): try: latest = News.objects.values('last_modified').latest( 'last_modified')['last_modified'] + latest = latest + utc_offset() cache.set(CACHE_NEWS_KEY, latest, CACHE_TIMEOUT) return latest except News.DoesNotExist: @@ -120,6 +135,7 @@ def refresh_news_latest(**kwargs): # thread. Update it instead. latest = News.objects.values('last_modified').latest( 'last_modified')['last_modified'] + latest = latest + utc_offset() cache.set(CACHE_NEWS_KEY, latest, CACHE_TIMEOUT) def news_etag(request, *args, **kwargs): |