def twitter_bot(rss_guid=None):
"""
Consumes a feed and checks if there are new entries in db.
If so, gets a shortened url and tweets the new status.
"""
if rss_guid is None:
# ancestor_key = ndb.Key("RSS_GUID", rss_guid or "*norss*")
# consumer = FeedConsume.get_last_rss_guid(ancestor_key)
# rss_guid = consumer[0].rss_guid
query = FeedConsume.gql("WHERE entry = :1", "latest")
result = query.get()
rss_guid = result.rss_guid
else:
consumer = FeedConsume(parent=ndb.Key("RSS_GUID", rss_guid or "*norss*"),
rss_guid=rss_guid, entry="latest")
consumer.put()
url = "{}erss.cgi?rss_guid={}".format(conf("pubmed_rss"), rss_guid)
feeds = feedparser.parse(url)
tweets = []
for feed in feeds["items"]:
pmid = (feed["link"].split("/")[-1]).rstrip("?dopt=Abstract")
if "entrez?" in pmid:
continue
query = FeedItem.gql("WHERE pmid = :1", pmid)
# if pmid not in db
if (query.count() == 0):
title = feed["title"]
otitle = title
url = feed["link"]
category = feed["category"]
item = FeedItem()
item.pmid = pmid
# shorten the url with Bitly.com
shorturl = shorten_url_bitly(url)
# tweet the new entry
max_length = (140 - len(category) - len(shorturl) - 7)
print(max_length)
if len(title) > max_length:
title = title[0:max_length]
status = "#{}: {}... {}".format("".join(category.split()), title.rstrip(". "), shorturl)
try:
status = unicode(status).encode("utf-8")
except UnicodeEncodeError:
pass
# TODO: add logging
# tweet new status
# tweets.append({'title': "{}...".format(title.rstrip(". ")), 'url': shorturl})
ttitle = "#{}: {}...".format("".join(category.split()), otitle[0:100].rstrip(". "))
tweets.append({'title': ttitle, 'url': shorturl})
try:
update_status_twitter(status)
item.put()
except:
pass
return tweets
def on_post(self, req, resp):
# print req.stream.read()
# try:
# raw = req.stream.read()
# except Exception as ex:
# raise falcon.HTTPError(falcon.HTTP_400,
# 'Error',
# ex.message)
#
# try:
# result = json.loads(raw, encoding='utf-8')
# except ValueError:
# raise falcon.HTTPError(falcon.HTTP_400,
# 'Malformed JSON',
# 'Could not decode the request body. The '
# 'JSON was incorrect.')
result = req.stream.read().split('&')
item_id = result[0].split('=')[1]
pinned = result[1].split('=')[1]
if pinned == 'False':
pinned = False
else:
pinned = True
success = FeedItem.pin(item_id, pinned)
resp.content_type = 'text/json'
if success:
resp.body = json.dumps(FeedItem.get(item_id))
resp.status = falcon.HTTP_200
else:
resp.status = falcon.HTTP_400
def update_feed(self, feed):
"""Fetch the feed and process new items"""
d = self.parse_feed(feed)
if d is None:
logging.warn("Parsing failed")
feed.last_polled = datetime.utcnow()
feed.put()
return
to_put = []
for entry in d['entries']:
item = FeedItem.process_entry(entry, feed)
if item is not None:
item_exists = FeedItem.get_by_key_name(item._key_name)
if item_exists is None:
to_put.append(item)
# TODO: what about updates?
if len(to_put) > 0:
db.put(to_put)
# self.update_mavenn_activity(feed.stream_id, to_put)
# update feedstream properties
if hasattr(d, 'status'):
feed.http_status = str(d.status)
if hasattr(d, 'modified'):
feed.http_last_modified = datetime(*d.modified[:6])
if hasattr(d, 'etag'):
feed.http_etag = d.etag
feed.last_polled = datetime.utcnow()
feed.put()
return
def get_feed_item(url, description, user_id):
if description is None:
description = ""
request = urllib.request.Request(
url, headers={"User-Agent": "Mozila/5.0"})
client = urllib.request.urlopen(request)
web_page = BeautifulSoup(client.read(), "html.parser")
title = web_page.title.string
item = FeedItem(url, title)
item.description = description
item.user_id = user_id
return item
def setup_database(db_file_path=settings.DB_FILE_PATH):
"""
Connect the database.
Create the database tables if they don't exists already.
"""
# import models here to avoid circular references
from models import BaseModel, Feed, FeedItem
BaseModel.db.connect()
Feed.create_table()
FeedItem.create_table()
def run(self, feed_id):
# Get feed object
feed = Feed.objects.get(id=feed_id)
# Debug log
LOGGER.debug("Updating feed %s", feed.name)
# Set User-Agent header
feedparser.USER_AGENT = "Element43Feedreader/Git +https://element-43.com/"
# Fetch feed
document = feedparser.parse(feed.url)
if document.status == 200:
# Remove all existing entries of that feed
FeedItem.objects.filter(feed=feed).delete()
# Add current content
for item in document.entries:
# Create item
feed_item = FeedItem(
feed=feed,
title=(item.title[:97] +
'...') if len(item.title) > 100 else item.title,
description=item.summary,
link=item.link,
published=pytz.utc.localize(
datetime.fromtimestamp(mktime(item.published_parsed))))
# Save item to DB
feed_item.save()
else:
# Log HTTP error
LOGGER.warn(
"Error fetching feed %s - server returned status code %d .",
feed.name, document.status)
# Set next update to be 5 minutes from now
five_minutes_from_now = datetime.utcnow() + timedelta(minutes=5)
feed.next_update = pytz.utc.localize(five_minutes_from_now)
feed.save()
LOGGER.debug("Finished updating feed %s", feed.name)
def run(self, feed_id):
# Get feed object
feed = Feed.objects.get(id=feed_id)
# Debug log
LOGGER.debug("Updating feed %s", feed.name)
# Set User-Agent header
feedparser.USER_AGENT = "Element43Feedreader/Git +https://element-43.com/"
# Fetch feed
document = feedparser.parse(feed.url)
if document.status == 200:
# Remove all existing entries of that feed
FeedItem.objects.filter(feed=feed).delete()
# Add current content
for item in document.entries:
# Create item
feed_item = FeedItem(feed=feed,
title=item.title,
description=item.summary,
link=item.link,
published=pytz.utc.localize(datetime.fromtimestamp(mktime(item.published_parsed))))
# Save item to DB
feed_item.save()
else:
# Log HTTP error
LOGGER.warn("Error fetching feed %s - server returned status code %d .", feed.name, document.status)
# Set next update to be 5 minutes from now
five_minutes_from_now = datetime.utcnow() + timedelta(minutes=5)
feed.next_update = pytz.utc.localize(five_minutes_from_now)
feed.save()
LOGGER.debug("Finished updating feed %s", feed.name)
def _init(self):
logging.debug("ShowFeed::_init()")
feeds = Feed.get_active_feeds()
if feeds:
for feed in feeds:
if time.time() - time.mktime(datetime.datetime.timetuple(feed.last_updated)) >= 3600*4:
logging.debug("Feed '%s' Triggered feed update" % feed.name)
self._updateFeeds()
break
self.items = FeedItem.get_latest()
logging.debug("Got %d feed items" % self.items.count())
def get(self):
if self.request.get("id"):
item = FeedItem.get_by_id(int(self.request.get("id")))
if item:
if 'content_type' not in item.__dict__:
item.content_type = 'image/png'
item.put()
self.response.headers["Content-Type"] = item.content_type
self.response.out.write(item.enclosure)
else:
self.redirect("/assets/hello.jpg")
else:
self.redirect("/assets/hello.jpg")
def on_get(self, req, resp):
collection_type = req.params.get('sort') or 'default'
start = int(req.params.get('start') or 0)
count = int(req.params.get('count') or 10)
if start < 0:
start = 0
if count < 0 or count > 10:
count = 10
items = FeedItem.all(collection_type, start, count)
data = {
'pagination': {
'next_url': '/api/feed/?sort=%s&start=%s&count=%s' % (collection_type, start + count, count),
'sort': collection_type,
'start': start,
'next_start': start + count,
'count': count,
'total': FeedItem.count()
},
'items': items
}
resp.content_type = 'text/json'
resp.body = json.dumps(data)
resp.status = falcon.HTTP_200
def refresh_rss(url):
''' Deletes and re-fills the blog feed database with RSS entries '''
feed = parse(url)
if feed['bozo'] == 1:
raise Exception, '%s is not a valid RSS stream!' % url
items = []
for item in islice(feed['items'], 5):
feeditem = FeedItem(title=item.title,
description=truncate(strip_html(item.description, True)),
date=datetime.fromtimestamp(mktime(item.updated_parsed)),
url=item.link)
items.append(feeditem)
FeedItem.query.delete()
db.session.add_all(items)
db.session.commit()
def post(self, stream_id):
"""Handles Content Distribution notifications."""
logging.debug(self.request.headers)
logging.debug(self.request.body)
feed = feedparser.parse(self.request.body)
if feed.bozo:
logging.error('Bozo feed data. %s: %r',
feed.bozo_exception.__class__.__name__,
feed.bozo_exception)
if (hasattr(feed.bozo_exception, 'getLineNumber') and
hasattr(feed.bozo_exception, 'getMessage')):
line = feed.bozo_exception.getLineNumber()
logging.error('Line %d: %s', line, feed.bozo_exception.getMessage())
segment = self.request.body.split('\n')[line-1]
logging.info('Body segment with error: %r', segment.decode('utf-8'))
return self.response.set_status(500)
feedstream = FeedStream.get_by_key_name("z%s" % stream_id)
if feedstream is None:
logging.warn("Discarding update from unknown feed '%s'", stream_id)
self.error(404)
return
logging.info("Processing update for feed '%s'", feedstream.url)
logging.info('Found %d entries', len(feed.entries))
to_put = [] # batch datastore updates
for entry in feed.entries:
item = FeedItem.process_entry(entry, feedstream)
if item is not None:
to_put.append(item)
if len(to_put) > 0:
db.put(to_put)
# update feed last_polled or http_last_modified so feed poller doesn't have to check this feed for a while
feedstream.last_polled = datetime.utcnow()
feedstream.put()
#self.update_mavenn_activity(feedstream.stream_id, to_put)
# Response headers (body can be empty)
# X-Hub-On-Behalf-Of
self.response.set_status(200)
self.response.out.write("ok");
def create_feed_item(url, description, user_id, title):
item = FeedItem(url, title)
item.description = description
item.user_id = user_id
return item
def get(self):
feeds = self._getFeeds()
logging.debug("Got %d feeds" % feeds.count())
for feed in feeds:
logging.debug("Feed %s last updated %s" % (feed.name, feed.last_updated))
force = self.request.get("force") == "1"
if force:
logging.debug("Force option enabled")
if not force and time.time() - time.mktime(datetime.datetime.timetuple(feed.last_updated)) < 3600*4:
logging.debug("Feed %s doesn't need updates, skipping" % feed.name)
continue
logging.debug("Fetching %s" % feed.url)
feed_content = urlfetch.fetch(feed.url)
logging.debug("Fetched, status = %d" % feed_content.status_code)
if feed_content.status_code == 200:
parsed_feed = feedparser.parse(feed_content.content)
feed.last_updated = datetime.datetime.now()
feed.put()
else:
logging.error("Failed to load feed %s" % feed.name)
self.error(500)
linkre = re.compile("http://(?:www\.)?explosm.net/comics/\d+/?")
comicre = re.compile('(http://(?:www\.)?explosm.net/db/files/Comics/[A-z0-9_\-\+]+/[A-z0-9\-_\+]+\.(gif|png))')
logging.debug("Got %d entries" % len(parsed_feed.entries))
for e in parsed_feed.entries:
if linkre.match(e.link):
if not FeedItem.is_fetched(e.link):
logging.debug("Going to fetch entry %s" % e.link)
result = urlfetch.fetch(e.link)
logging.debug("Fetched, status = %d" % result.status_code)
if result.status_code == 200:
results = comicre.findall(result.content)
if results and len(results) > 0:
logging.debug("Going to fetch enclosure %s" % results[0][0])
enclosure = urlfetch.fetch(results[0][0])
logging.debug("Fetched, status = %d" % enclosure.status_code)
if enclosure.status_code == 200:
feed_item = FeedItem()
feed_item.title = e.title
feed_item.url = e.link
feed_item.content_type = "image/"+results[0][1]
feed_item.feed = feed
feed_item.date = datetime.datetime.fromtimestamp(time.mktime(e.updated_parsed))
feed_item.content = db.Text(e.description)
feed_item.enclosure = enclosure.content
feed_item.put()
else:
logging.error("Failed to fetch enclosure %s" % results[0])
else:
logging.debug("Got no enclosure in %s" % e.link)
else:
logging.debug("Failed to download %s" % e.link)
else:
logging.debug("Skipping already fetch item %s" % e.link)
else:
logging.debug("Skipping unknown link %s" % e.link)
def check(self):
logger.debug("{name} 正在检查更新", name=self.name)
@retry(stop_max_attempt_number=3)
def fetch():
logger.debug(f"{self.name} 正在抓取" + self.feed_url)
feed_text = requests.get(self.feed_url).text
logger.debug(f"{self.name} 抓取成功")
f = feedparser.parse(feed_text)
assert not f.get("bozo_exception")
feed_entries = f['entries']
logger.debug(f"{self.name} 获取到{len(feed_entries)}条")
if len(feed_entries) == 0:
logger.error(f"{self.name} 获取到的feed为空")
raise Exception()
return feed_entries
feed_entries = fetch()
changed_items = []
for e in feed_entries:
item = FeedItem()
item.title = e["title"]
item.uuid = e['id']
item.link = e['link']
item.content = e['summary']
item.full_content = f"【{item.title}】 {item.content}"
last = self.storage.get(item.uuid)
if last != item.full_content:
self.storage.set(item.uuid, item.full_content)
item.is_new = (last is None)
item.old_full_content = last
logger.info(
f"{self.name} {'新增' if item.is_new else '修改'}内容 {item.title} - {item.uuid}"
)
changed_items.append(item)
logger.info(f"{self.name} 检测到变化条目%d" % len(changed_items))
if self.first_run:
logger.info(f"{self.name} 第一次运行，不通知")
self.first_run = False
return
if len(changed_items) > 5:
logger.warning(f"{self.name} 周期内更新的条目太多")
else:
for item in changed_items:
for n in self.notifies:
@retry(stop_max_attempt_number=3)
def do_notify():
logger.info(f"{self.name} 正在通过{n}发送通知")
n.notify(item)
do_notify()
