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#! /usr/bin/env python
# Newspipe - A web news aggregator.
# Copyright (C) 2010-2022 Cédric Bonhomme - https://www.cedricbonhomme.org
#
# For more information: https://sr.ht/~cedric/newspipe
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 4.2 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2019/05/21 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "AGPLv3"
import asyncio
import io
import logging
from datetime import datetime, timedelta
import dateutil.parser
import feedparser
from newspipe.bootstrap import application
from newspipe.controllers import ArticleController, FeedController
from newspipe.lib.article_utils import (
construct_article,
extract_id,
)
from newspipe.lib.feed_utils import construct_feed_from, is_parsing_ok
from newspipe.lib.utils import newspipe_get
logger = logging.getLogger(__name__)
sem = asyncio.Semaphore(5)
async def parse_feed(user, feed):
"""
Fetch a feed.
Update the feed and return the articles.
"""
parsed_feed = None
up_feed = {}
articles = []
resp = None
# with (await sem):
try:
logger.info(f"Retrieving feed {feed.link}")
resp = newspipe_get(feed.link, timeout=5)
except Exception:
logger.info(f"Problem when reading feed {feed.link}")
return
if None is resp:
return
try:
content = io.BytesIO(resp.content)
parsed_feed = feedparser.parse(content)
except Exception as e:
up_feed["last_error"] = str(e)
up_feed["error_count"] = feed.error_count + 1
logger.exception("error when parsing feed: " + str(e))
up_feed["last_retrieved"] = datetime.now(dateutil.tz.tzlocal())
if parsed_feed is None:
try:
FeedController().update({"id": feed.id}, up_feed)
except Exception as e:
logger.exception("something bad here: " + str(e))
return
if not is_parsing_ok(parsed_feed):
up_feed["last_error"] = str(parsed_feed["bozo_exception"])
up_feed["error_count"] = feed.error_count + 1
FeedController().update({"id": feed.id}, up_feed)
return
if parsed_feed["entries"] != []:
articles = parsed_feed["entries"]
up_feed["error_count"] = 0
up_feed["last_error"] = ""
# Feed information
try:
up_feed.update(construct_feed_from(feed.link, parsed_feed))
except Exception:
logger.exception(f"error when constructing feed: {feed.link}")
if feed.title and "title" in up_feed:
# do not override the title set by the user
del up_feed["title"]
try:
FeedController().update({"id": feed.id}, up_feed)
except Exception:
logger.exception(f"error when updating feed: {feed.link}")
return articles
async def insert_articles(queue, nḅ_producers=1):
"""Consumer coroutines."""
nb_producers_done = 0
while True:
item = await queue.get()
if item is None:
nb_producers_done += 1
if nb_producers_done == nḅ_producers:
logger.info("All producers done.")
logger.info("Process finished.")
break
continue
user, feed, articles = item
if None is articles:
logger.info("None")
articles = []
logger.info(f"Inserting articles for {feed.link}")
art_contr = ArticleController(user.id)
for article in articles:
new_article = await construct_article(article, feed)
try:
existing_article_req = art_contr.read(
user_id=user.id, feed_id=feed.id, entry_id=extract_id(article)
)
except Exception as e:
logger.exception("existing_article_req: " + str(e))
continue
exist = existing_article_req.count() != 0
if exist:
continue
# insertion of the new article
try:
art_contr.create(**new_article)
logger.info("New article added: {}".format(new_article["link"]))
except Exception:
logger.exception("Error when inserting article in database.")
continue
async def retrieve_feed(queue, users, feed_id=None):
"""
Launch the processus.
"""
for user in users:
logger.info(f"Starting to retrieve feeds for {user.nickname}")
filters = {}
filters["user_id"] = user.id
if feed_id is not None:
filters["id"] = feed_id
filters["enabled"] = True
filters["error_count__lt"] = application.config["DEFAULT_MAX_ERROR"]
filters["last_retrieved__lt"] = datetime.now() - timedelta(
minutes=application.config["FEED_REFRESH_INTERVAL"]
)
# feeds = FeedController().read(**filters).all()
feeds = [] # temporary fix for: sqlalchemy.exc.OperationalError:
# (psycopg2.OperationalError) SSL SYSCALL error: EOF detected
for feed in user.feeds:
if not feed.enabled:
continue
if feed.error_count > application.config["DEFAULT_MAX_ERROR"]:
continue
if feed.last_retrieved > (
datetime.now()
- timedelta(minutes=application.config["FEED_REFRESH_INTERVAL"])
):
continue
if None is feed_id or (feed_id and feed_id == feed.id):
feeds.append(feed)
if feeds == []:
logger.info(f"No feed to retrieve for {user.nickname}")
for feed in feeds:
articles = await parse_feed(user, feed)
await queue.put((user, feed, articles))
await queue.put(None)
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