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#! /usr/bin/env python
# -*- coding: utf-8 -
# jarr - A Web based news aggregator.
# Copyright (C) 2010-2016 Cédric Bonhomme - https://www.cedricbonhomme.org
#
# For more information : https://github.com/JARR/JARR
#
# 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
from sqlalchemy import or_
import conf
from bootstrap import db
from web.models import User
from web.controllers import FeedController, ArticleController
from web.lib.feed_utils import construct_feed_from, is_parsing_ok
from web.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
finally:
up_feed['last_retrieved'] = datetime.now(dateutil.tz.tzlocal())
if parsed_feed is None:
FeedController().update({'id': feed.id}, up_feed)
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 informations
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.debug('inserting articles for {}'.format(feed.title))
logger.info("Database insertion...")
new_articles = []
art_contr = ArticleController(user.id)
for article in articles:
try:
existing_article_req = art_contr.read(feed_id=feed.id,
**extract_id(article))
except Exception as e:
print("existing_article_req: " + str(e))
continue
exist = existing_article_req.count() != 0
if exist:
# if the article has been already retrieved, we only update
# the content or the title
logger.debug("Article %r (%r) already in the database.",
article['title'], article['link'])
existing_article = existing_article_req.first()
new_updated_date = None
try:
new_updated_date = dateutil.parser.parse(article['updated'])
except Exception as e:
print(e)#new_updated_date = existing_article.date
if None is existing_article.updated_date:
existing_article.updated_date = new_updated_date.replace(tzinfo=None)
if existing_article.updated_date.strftime('%Y-%m-%dT%H:%M:%S') != \
new_updated_date.strftime('%Y-%m-%dT%H:%M:%S'):
existing_article.updated_date = \
new_updated_date.replace(tzinfo=None)
if existing_article.title != article['title']:
existing_article.title = 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())
continue
article = construct_article(article, feed)
try:
new_articles.append(art_contr.create(**article))
logger.info("New article % (%r) added.",
article['title'], 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
articles = await insert_database(user, feed)
logger.debug('inserted articles for %s', feed.title)
return articles
def retrieve_feed(loop, user, feed_id=None):
"""
Launch the processus.
"""
logger.info("Starting to retrieve feeds.")
# Get the list of feeds to fetch
user = User.query.filter(User.email == user.email).first()
feeds = [feed for feed in user.feeds if
feed.error_count <= conf.DEFAULT_MAX_ERROR and feed.enabled]
if feed_id is not None:
feeds = [feed for feed in feeds if feed.id == feed_id]
if feeds == []:
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')
logger.info("All articles retrieved. End of the processus.")
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