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#! /usr/bin/env python
#-*- coding: utf-8 -*-
# pyAggr3g470r - A Web based news aggregator.
# Copyright (C) 2010-2013 Cédric Bonhomme - http://cedricbonhomme.org/
#
# For more information : http://bitbucket.org/cedricbonhomme/pyaggr3g470r/
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 2.0 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2013/11/10 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "GPLv3"
import urllib2
import requests
import threading
import feedparser
from datetime import datetime
from urllib import urlencode
from urlparse import urlparse, parse_qs, urlunparse
from BeautifulSoup import BeautifulSoup
from requests.exceptions import Timeout
from sqlalchemy.exc import IntegrityError
import models
import conf
#import search
import utils
from flask.ext.mail import Message
from pyaggr3g470r import app, db, mail
from pyaggr3g470r.models import User, Feed, Article
import log
pyaggr3g470r_log = log.Log("feedgetter")
list_of_threads = []
class FeedGetter(object):
"""
This class is in charge of retrieving feeds listed in ./var/feed.lst.
This class uses feedparser module from Mark Pilgrim.
For each feed a new thread is launched.
"""
def __init__(self, email):
"""
Initializes the database connection.
"""
feedparser.USER_AGENT = conf.USER_AGENT
if conf.HTTP_PROXY == "":
self.proxy = urllib2.ProxyHandler({})
self.proxies = {}
else:
self.proxy = urllib2.ProxyHandler({"http" : conf.HTTP_PROXY, \
"https": conf.HTTP_PROXY})
self.proxies = {
"http": "http://" + conf.HTTP_PROXY,
"https": "http://" + conf.HTTP_PROXY
}
feedparser.USER_AGENT = conf.USER_AGENT
self.user = User.query.filter(User.email == email).first()
def retrieve_feed(self, feed_id=None):
"""
Parse the file 'feeds.lst' and launch a thread for each RSS feed.
"""
feeds = [feed for feed in self.user.feeds if feed.enabled]
if feed_id != None:
feeds = [feed for feed in feeds if str(feed.id) == feed_id]
for current_feed in feeds:
try:
# launch a new thread for the RSS feed
thread = threading.Thread(None, self.process, \
None, (current_feed, ))
thread.start()
list_of_threads.append(thread)
except:
pass
# wait for all threads are done
for th in list_of_threads:
th.join()
def process(self, feed):
"""
Retrieves articles form the feed and add them to the database.
"""
a_feed = feedparser.parse(feed.link, handlers = [self.proxy])
if a_feed['entries'] == []:
return
# Feed informations
if feed.title == "":
try:
feed.title = a_feed.feed.title
except:
feed.title = ""
if feed.description == "":
try:
feed.description = a_feed.feed.subtitle
except:
feed.description = ""
articles = []
for article in a_feed['entries']:
nice_url = article.link.encode("utf-8")
if conf.RESOLVE_ARTICLE_URL:
try:
# resolves URL behind proxies (like feedproxy.google.com)
r = requests.get(article.link, timeout=5.0, proxies=self.proxies)
nice_url = r.url.encode("utf-8")
except Timeout:
pyaggr3g470r_log.warning("Timeout when getting the real URL of %s." % (article.link,))
continue
except Exception as e:
pyaggr3g470r_log.warning("Unable to get the real URL of %s. Error: %s" % (article.link, str(e)))
continue
# remove utm_* parameters
parsed_url = urlparse(nice_url)
qd = parse_qs(parsed_url.query, keep_blank_values=True)
filtered = dict((k, v) for k, v in qd.iteritems() if not k.startswith('utm_'))
nice_url = urlunparse([
parsed_url.scheme,
parsed_url.netloc,
parsed_url.path,
parsed_url.params,
urlencode(filtered, doseq=True),
parsed_url.fragment
])
description = ""
article_title = ""
try:
# article content
description = article.content[0].value
except AttributeError:
try:
# article description
description = article.description
except Exception:
description = ""
try:
description = BeautifulSoup(description, "html.parser").decode()
article_title = BeautifulSoup(article.title, "html.parser").decode()
except Exception as E:
#pyaggr3g470r_log.error("Problem when sanitizing the content of the article %s (%s)" % (article_title, nice_url))
article_title = article.title
try:
post_date = datetime(*article.published_parsed[:6])
except:
post_date = datetime(*article.updated_parsed[:6])
# save the article
article = Article(link=nice_url, title=article_title,
content=description, readed=False, like=False, date=post_date)
articles.append(article)
# add the article to the Whoosh index
"""
try:
search.add_to_index([article], feed)
except Exception as e:
pyaggr3g470r_log.error("Whoosh error.")
pass"""
# email notification
if conf.MAIL_ENABLED and feed.email_notification:
with app.app_context():
msg = Message('[pyAggr3g470r] ' + feed.title + ' : ' + article.title, \
sender = conf.MAIL_FROM, recipients = [conf.MAIL_TO])
msg.body = utils.clear_string(description)
msg.html = description
mail.send(msg)
# add the articles to the list of articles for the current feed
for article in articles:
try:
feed.articles.append(article)
db.session.merge(article)
db.session.commit()
pyaggr3g470r_log.info("New article %s (%s) added." % (article_title, nice_url))
except IntegrityError:
pyaggr3g470r_log.error("Article %s (%s) already in the database." % (article_title, nice_url))
db.session.rollback()
continue
except Exception as e:
pyaggr3g470r_log.error("Error when inserting article in database: " + str(e))
continue
return True
if __name__ == "__main__":
# Point of entry in execution mode
feed_getter = FeedGetter()
# Retrieve all feeds
feed_getter.retrieve_feed()
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