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#! /usr/bin/env python
# -*- coding: utf-8 -
# pyAggr3g470r - A Web based news aggregator.
# Copyright (C) 2010-2015 Cédric Bonhomme - https://www.cedricbonhomme.org
#
# For more information : https://bitbucket.org/cedricbonhomme/pyaggr3g470r/
#
# 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: 3.2 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2015/04/08 $"
__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 pyaggr3g470r.models import User
from pyaggr3g470r.controllers import FeedController, ArticleController
from pyaggr3g470r.lib.feed_utils import construct_feed_from
from pyaggr3g470r.lib.article_utils import construct_article, extract_id
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
@asyncio.coroutine
def get(*args, **kwargs):
#kwargs["connector"] = aiohttp.TCPConnector(verify_ssl=False)
try:
#logger.info("Fetching the feed: " + args[0])
#response = yield from aiohttp.request('GET', *args, **kwargs)
#return (yield from response.read_and_close(decode=False))
data = feedparser.parse(args[0])
return data
except Exception as e:
#print(e)
raise e
@asyncio.coroutine
def parse_feed(user, feed):
"""
Fetch a feed.
"""
a_feed = None
with (yield from sem):
try:
a_feed = yield from get(feed.link)
except Exception as e:
feed.last_error = str(e)
finally:
if a_feed is None:
feed.error_count += 1
db.session.commit()
return
up_feed = {}
if a_feed['bozo'] == 1:
up_feed['last_error'] = str(a_feed['bozo_exception'])
up_feed['error_count'] = feed.error_count + 1
db.session.commit()
if a_feed['entries'] == []:
return
up_feed['last_retrieved'] = datetime.now(dateutil.tz.tzlocal())
up_feed['error_count'] = 0
up_feed['last_error'] = ""
# Feed informations
up_feed.update(construct_feed_from(feed.link, a_feed))
if feed.title and 'title' in up_feed:
del up_feed['title']
FeedController().update({'id': feed.id}, up_feed)
return a_feed['entries']
@asyncio.coroutine
def insert_database(user, feed):
articles = yield from asyncio.async(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:
exist = art_contr.read(feed_id=feed.id, **extract_id(article))
if exist:
logger.debug("Article %r (%r) already in the database.",
article.title, article.link)
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
@asyncio.coroutine
def init_process(user, feed):
# Fetch the feed and insert new articles in the database
articles = yield from asyncio.async(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 = []
try:
# Python 3.5 (test)
tasks = [asyncio.ensure_future(init_process(user, feed))
for feed in feeds]
except:
tasks = [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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