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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: 3.1 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2015/02/08 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "AGPLv3"
import asyncio
import aiohttp
import logging
import requests
import feedparser
import dateutil.parser
from datetime import datetime
from bs4 import BeautifulSoup
from sqlalchemy import or_
from pyaggr3g470r import utils
import conf
from bootstrap import db
from pyaggr3g470r.models import User, Article
if not conf.ON_HEROKU:
import pyaggr3g470r.search as fastsearch
logger = logging.getLogger(__name__)
sem = asyncio.Semaphore(5)
@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))
except Exception as e:
print(e)
return None
@asyncio.coroutine
def parse_feed(user, feed):
"""
Fetch a feed.
"""
data = None
with (yield from sem):
data = yield from get(feed.link)
if data is None:
return
a_feed = feedparser.parse(data)
if a_feed['bozo'] == 1:
logger.error(a_feed['bozo_exception'])
if a_feed['entries'] == []:
return
# Feed informations
if feed.title == "":
try:
feed.title = a_feed.feed.title
except:
feed.title = "No title"
if feed.link == "":
try:
feed.link = a_feed.feed.link
except:
feed.link = ""
if feed.description == "":
try:
feed.description = a_feed.feed.subtitle
except:
feed.description = ""
articles = []
for article in a_feed['entries']:
try:
nice_url = article.link
except:
# if not able to get the link of the article, continue
continue
if conf.RESOLVE_ARTICLE_URL:
try:
# resolves URL behind proxies
# (like feedproxy.google.com)
r = requests.get(article.link, timeout=5.0)
nice_url = r.url
except Exception as error:
logger.warning(
"Unable to get the real URL of %s. Error: %s",
article.link, error)
pass
# remove utm_* parameters
nice_url = utils.clean_url(nice_url)
try:
entry_id = article.id
except:
entry_id = nice_url
description = ""
article_title = article.get('title', '')
try:
# article content
description = article.content[0].value
except AttributeError:
# article description
description = article.get('description', '')
try:
soup = BeautifulSoup(description, "lxml")
# Prevents BeautifulSoup4 from adding extra <html><body> tags
# to the soup with the lxml parser.
if soup.html.body:
description = soup.html.body.decode_contents()
elif soup.html:
description = soup.html.decode_contents()
else:
description = soup.decode()
except:
logger.error("Problem when sanitizing the content of the article %s (%s)",
article_title, nice_url)
# Get the date of publication of the article
post_date = None
for date_key in ('published_parsed', 'published',
'updated_parsed', 'updated'):
if not date_key in article:
continue
try:
post_date = dateutil.parser.parse(article[date_key],
dayfirst=True)
break
except:
try: # trying to clean date field from letters
post_date = dateutil.parser.parse(
re.sub('[A-z]', '', article[date_key]),
dayfirst=True)
break
except:
pass
else:
post_date = datetime.now(dateutil.tz.tzlocal())
# create the models.Article object and append it to the list of articles
article = Article(entry_id=entry_id, link=nice_url, title=article_title,
content=description, readed=False, like=False,
date=post_date, user_id=user.id,
feed_id=feed.id)
articles.append(article)
return articles
@asyncio.coroutine
def insert_database(user, feed):
articles = yield from asyncio.async(parse_feed(user, feed))
if None is articles:
return []
#print('inserting articles for {}'.format(feed.title))
logger.info("Database insertion...")
new_articles = []
query1 = Article.query.filter(Article.user_id == user.id)
query2 = query1.filter(Article.feed_id == feed.id)
for article in articles:
exist = query2.filter(or_(Article.entry_id==article.entry_id, Article.link==article.link)).count() != 0
if exist:
#logger.debug("Article %r (%r) already in the database.", article.title, article.link)
continue
new_articles.append(article)
try:
feed.articles.append(article)
#db.session.merge(article)
db.session.commit()
#logger.info("New article % (%r) added.", article.title, article.link)
except Exception as e:
logger.error("Error when inserting article in database: " + str(e))
continue
#db.session.close()
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))
#print('inserted articles for {}'.format(feed.title))
# Indexation of the new articles for the feed
if not conf.ON_HEROKU and articles != []:
try:
#print('indexing articles for {}'.format(feed.title))
fastsearch.add_to_index(user.id, articles, feed)
except:
logger.exception("Problem during indexation:")
return articles
def retrieve_feed(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.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
loop = asyncio.get_event_loop()
tasks = [init_process(user, feed) for feed in feeds]
#tasks = [asyncio.async(init_process(user, feed)) for feed in feeds]
loop.run_until_complete(asyncio.wait(tasks))
logger.info("All articles retrieved. End of the processus.")
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