def subscription_fetch_and_save(request):
"""
fetch, parse and save entries from a given subscription.
"""
host = 'http://%s' % request.get_host()
key = request.POST.get('key')
logging.info('task run with key %s' % key)
subscription = db.get(db.Key(key))
if subscription is None:
logging.error('CRON: can not find that subscription %s' % key)
raise Http404
else:
#request latest entries from subscription's feed_url
if subscription:
if subscription.updated:
modified = subscription.updated.timetuple()
else:
modified = None
feed = DataFeed(subscription.feed_url, subscription.etag, modified)
if feed.parse():
entries = feed.entries
subscription.etag = feed.etag
subscription.updated = datetime.datetime(*feed.modified[:6])
subscription.save()
else:
entries = []
result = save_feed_entries(subscription, entries, host)
if result:
logging.info('CRON:Entries fetched and saved for %s url %s' % (key,
subscription.feed_url))
return HttpResponse('Thanks Cron!')
else:
logging.error('CRON:Entries NOT saved for %s' % key)
return HttpResponse('Sorry Cron!')
def subscribe_callback(request, key):
"""
handles both subscription verification from the hub and the processing of
entries coming from a feed sent by the hub.
Difference: GET is used for verification and POST is used for pushing the
feed.
"""
host = 'http://%s' % request.get_host()
if request.method == 'GET':
# just confirm everything for now. nexttime, use verify_token and update
# the subscription entity.
hub_challenge = request.GET.get('hub.challenge', '')
subscription = db.get(db.Key(key))
if subscription is None:
logging.error('CALLBACK:can not find that subscription %s' % key)
raise Http404
else:
subscription.verified = True
subscription.save()
return HttpResponse(hub_challenge)
else:
feed_body = request.raw_post_data
subscription = db.get(db.Key(key))
if subscription:
if subscription.updated:
modified = subscription.updated.timetuple()
else:
modified = None
#parse the recieved feed body
feed = DataFeed(feed_body, subscription.etag, modified)
if feed.parse():
entries = feed.entries
subscription.etag = feed.etag
subscription.updated = datetime.datetime(*feed.modified[:6])
subscription.save()
else:
entries = []
result = save_feed_entries(subscription, entries, host)
if result:
logging.info('HUB:Entries recieved for subscr. %s' % key)
return HttpResponse('Thanks Hub!')
else:
logging.error('HUB:Can not find subscr. %s' % key)
return HttpResponse('Sorry Hub!')