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#! /usr/bin/env python
# -*- coding: utf-8 -
# newspipe - A Web based news aggregator.
# Copyright (C) 2010-2016 Cédric Bonhomme - https://www.cedricbonhomme.org
#
# For more information : https://github.com/Newspipe/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: 3.3 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2015/12/07 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "AGPLv3"
import asyncio
import logging
import feedparser
import dateutil.parser
from datetime import datetime, timezone, timedelta
from sqlalchemy import or_
import conf
from bootstrap import db
from web.models import User
from web.controllers import FeedController, ArticleController
from lib.feed_utils import construct_feed_from, is_parsing_ok
from lib.article_utils import construct_article, extract_id, \
get_article_content
logger = logging.getLogger(__name__)
sem = asyncio.Semaphore(5)
import ssl
try:
_create_unverified_https_context = ssl._create_unverified_context
except AttributeError:
# Legacy Python that doesn't verify HTTPS certificates by default
pass
else:
# Handle target environment that doesn't support HTTPS verification
ssl._create_default_https_context = _create_unverified_https_context
async def get(*args, **kwargs):
#kwargs["connector"] = aiohttp.TCPConnector(verify_ssl=False)
try:
data = feedparser.parse(args[0])
return data
except Exception as e:
raise e
async def parse_feed(user, feed):
"""
Fetch a feed.
Update the feed and return the articles.
"""
parsed_feed = None
up_feed = {}
articles = []
with (await sem):
try:
parsed_feed = await get(feed.link)
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))
finally:
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
construct_feed_from(feed.link, parsed_feed).update(up_feed)
if feed.title and 'title' in up_feed:
# do not override the title set by the user
del up_feed['title']
FeedController().update({'id': feed.id}, up_feed)
return articles
async def insert_database(user, feed):
articles = await parse_feed(user, feed)
if None is articles:
return []
logger.info('Inserting articles for {}'.format(feed.title))
new_articles = []
art_contr = ArticleController(user.id)
for article in articles:
new_article = await construct_article(article, feed)
try:
existing_article_req = art_contr.read(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
# if the article has been already retrieved, we only update
# the content or the title
logger.info('Article already in the database: {}'. \
format(article['link']))
existing_article = existing_article_req.first()
if new_article['date'].replace(tzinfo=None) != \
existing_article.date:
existing_article.date = new_article['date']
existing_article.updated_date = new_article['date']
if existing_article.title != new_article['title']:
existing_article.title = new_article['title']
content = get_article_content(article)
if existing_article.content != content:
existing_article.content = content
existing_article.readed = False
art_contr.update({'entry_id': existing_article.entry_id},
existing_article.dump())
logger.info('Article updated: {}'.format(article['link']))
continue
# insertion of the new article
try:
new_articles.append(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
return new_articles
async def init_process(user, feed):
# Fetch the feed and insert new articles in the database
try:
articles = await insert_database(user, feed)
logger.debug('inserted articles for %s', feed.title)
return articles
except Exception as e:
logger.exception('init_process: ' + str(e))
def retrieve_feed(loop, user, feed_id=None):
"""
Launch the processus.
"""
logger.info('Starting to retrieve feeds for {}'.format(user.nickname))
# Get the list of feeds to fetch
filters = {}
filters['user_id'] = user.id
if feed_id is not None:
filters['id'] = feed_id
filters['enabled'] = True
filters['error_count__lt'] = conf.DEFAULT_MAX_ERROR
filters['last_retrieved__lt'] = datetime.now() - \
timedelta(minutes=conf.FEED_REFRESH_INTERVAL)
feeds = FeedController().read(**filters).all()
if feeds == []:
logger.info('No feed to retrieve for {}'.format(user.nickname))
return
# Launch the process for all the feeds
tasks = [asyncio.ensure_future(init_process(user, feed)) for feed in feeds]
try:
loop.run_until_complete(asyncio.wait(tasks))
except Exception:
logger.exception('an error occured')
finally:
logger.info('Articles retrieved for {}'.format(user.nickname))
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