def get_digest_for_list(list_owner, list_id, dev_mode):
digest_start_time, digest_end_time, max_cache_age = _get_digest_timestamps()
api = _get_digest_twitter_api(
max_cache_age, key='%s/%s' % (list_owner, list_id))
user, had_error = twitterappengine.exec_twitter_api(
lambda: api.GetUser(list_owner),
error_detail='user %s' % list_owner)
if not had_error:
timezone = twitterdisplay.get_timezone_for_user(user)
else:
timezone = None
fetcher = ListTwitterFetcher(api, list_owner, list_id, digest_start_time)
statuses, had_error = fetcher.fetch()
return _process_digest_statuses(
statuses,
digest_start_time,
digest_end_time,
had_error,
dev_mode,
timezone=timezone)
def _get_signed_in(self):
twitter_id = self._session.twitter_id
logging.info('Serving feed for %s' % twitter_id)
user, had_error = twitterappengine.exec_twitter_api(
lambda: self._api.GetUser(twitter_id),
error_detail='user %s' % twitter_id)
if had_error:
self._write_error(500)
return
stream = data.StreamData.get_timeline_for_user(twitter_id)
threshold_time = time.time() - FEED_STATUS_INTERVAL_SEC
# It's wasteful to serve the hub the full set of items in the feed, so
# we use a variant of the feed windowing technique described at
# http://code.google.com/p/pubsubhubbub/wiki/PublisherEfficiency#Feed_windowing
# to only give it new items. We treat the If-Modified-Since header as
# an indication of the items that the hub already has, but we allow one
# hour of overlap, in case of items getting dropped, replication delay,
# cosmic rays, etc.
if self._user_agent_contains('appid: pubsubhubbub'):
if_modified_since = self._get_if_modified_since()
if if_modified_since:
logging.info('If-Modified-Since: %d' % if_modified_since)
threshold_time = if_modified_since - IF_MODIFIED_SINCE_INTERVAL_SEC
# Since we're serving a partial response, we don't want proxies
# caching it.
self.response.headers['Cache-Control'] = 'private'
# We want the feed to have all tweets from the past day, but also at
# at least 10 items.
feed_status_ids = []
if stream:
for status_id, status_timestamp_sec in stream.status_pairs():
if status_timestamp_sec < threshold_time and \
len(feed_status_ids) >= MIN_FEED_ITEMS:
break
feed_status_ids.append(status_id)
logging.info(' Feed has %d items' % len(feed_status_ids))
status_data = data.StatusData.get_by_status_ids(feed_status_ids)
statuses = [s.to_status() for s in status_data]
timezone = twitterdisplay.get_timezone_for_user(user)
# We don't actually want statuses grouped, instead we want one status
# per item.
status_groups = [
twitterdisplay.DisplayStatusGroup(
user=status.user,
statuses=[status],
thumbnail_size=thumbnails.LARGE_THUMBNAIL,
timezone=timezone)
for status in statuses
]
updated_date = datetime.datetime.utcnow()
self._write_template('birdfeeder/feed.atom', {
'feed_title': '@%s Twitter Timeline' % user.screen_name,
'updated_date_iso': updated_date.isoformat(),
'feed_url': self.request.url,
'status_groups': status_groups,
},
content_type='application/atom+xml')
self._add_last_modified_header(updated_date)
def _get_signed_in(self):
twitter_id = self._session.twitter_id
logging.info('Serving feed for %s' % twitter_id)
user, had_error = twitterappengine.exec_twitter_api(
lambda: self._caching_api.GetUser(user_id=twitter_id,
include_entities=False),
error_detail='user %s' % twitter_id)
if had_error:
self._write_error(500)
return
stream = data.StreamData.get_timeline_for_user(twitter_id)
threshold_time = time.time() - FEED_STATUS_INTERVAL_SEC
if self._should_use_feed_windowing():
if_modified_since = self._get_if_modified_since()
if if_modified_since:
logging.info('If-Modified-Since: %d' % if_modified_since)
threshold_time = if_modified_since - IF_MODIFIED_SINCE_INTERVAL_SEC
# Since we're serving a partial response, we don't want proxies
# caching it.
self.response.headers['Cache-Control'] = 'private'
elif 'pubsubhubbub' in self.request.headers['User-Agent']:
# Google's PubSubHubbub hub no longer seems to send an
# If-Modified-Since header, but it crawls often enough that we
# can use a shorter interval for it.
threshold_time = time.time() - PUBSUBHUBBUB_HUB_INTERVAL_SEC
self.response.headers['Cache-Control'] = 'private'
# We want the feed to have all tweets from the past day, but also at
# at least 10 items.
feed_status_ids = []
if stream:
for status_id, status_timestamp_sec in stream.status_pairs():
if status_timestamp_sec < threshold_time and \
len(feed_status_ids) >= MIN_FEED_ITEMS:
break
feed_status_ids.append(status_id)
logging.info(' Feed has %d items' % len(feed_status_ids))
status_data = data.StatusData.get_by_status_ids(feed_status_ids)
statuses = [s.to_status() for s in status_data]
timezone = twitterdisplay.get_timezone_for_user(user)
# We don't actually want statuses grouped, instead we want one status
# per item.
status_groups = [
twitterdisplay.DisplayStatusGroup(
user=status.user,
statuses=[status],
thumbnail_size=thumbnails.LARGE_THUMBNAIL,
timezone=timezone)
for status in statuses
]
updated_date = datetime.datetime.utcnow()
self._write_template('birdfeeder/feed.atom', {
'feed_title': '@%s Twitter Timeline' % user.screen_name,
'updated_date_iso': updated_date.isoformat(),
'feed_url': self.request.url,
'status_groups': status_groups,
},
content_type='application/atom+xml')
self._add_last_modified_header(updated_date)
