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#! /usr/bin/env python
# -*- coding: utf-8 -
# pyAggr3g470r - A Web based news aggregator.
# Copyright (C) 2010-2014 Cédric Bonhomme - http://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: 2.1 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2014/04/13 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "AGPLv3"
import feedparser
import urllib2
import requests
from requests.exceptions import *
#from requests.packages.urllib3.exceptions import DecodeError
from urlparse import urlparse
from datetime import datetime
import gevent.monkey
#gevent.monkey.patch_socket()
gevent.monkey.patch_all()
from gevent import Timeout
from gevent.pool import Pool
"""
import logging
logging.basicConfig()
logging.getLogger().setLevel(logging.CRITICAL)
requests_log = logging.getLogger("requests.packages.urllib3")
requests_log.setLevel(logging.CRITICAL)
requests_log.propagate = True
"""
import models
import conf
if not conf.ON_HEROKU:
import search
import utils
if not conf.ON_HEROKU:
from flask.ext.mail import Message
from pyaggr3g470r import mail
from pyaggr3g470r import app, db
from pyaggr3g470r.models import User, Feed, Article
import log
pyaggr3g470r_log = log.Log("feedgetter")
class TooLong(Exception):
def __init__(self):
"""
Log a when greenlet took to long to fetch a resource.
"""
pyaggr3g470r_log.warning("Greenlet took to long")
class FeedGetter(object):
"""
This class is in charge of retrieving the feeds.
"""
def __init__(self, email):
"""
Initialization.
"""
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):
"""
Launch the processus.
"""
pyaggr3g470r_log.info("Starting to retrieve feeds.")
# 1 - Get the list of feeds to fetch
user = User.query.filter(User.email == self.user.email).first()
feeds = [feed for feed in user.feeds if feed.enabled]
if feed_id != None:
feeds = [feed for feed in feeds if feed.id == feed_id]
# 2 - Fetch the feeds.
# 'responses' contains all the jobs returned by the function retrieve_async()
responses = self.retrieve_async(feeds)
# 3 - Insert articles in the database
self.insert_database([item.value for item in responses if item.value is not None])
pyaggr3g470r_log.info("All articles retrieved. End of the processus.")
def retrieve_async(self, feeds):
"""
Spawn different jobs in order to retrieve a list of feeds.
Returns a list of jobs.
"""
def fetch(feed):
"""
Fetch a feed.
"""
pyaggr3g470r_log.info("Fetching the feed:" + feed.title)
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
nice_url = utils.clean_url(nice_url)
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])
# create the models.Article object and append it to the list of articles
article = Article(link=nice_url, title=article_title, \
content=description, readed=False, like=False, date=post_date, \
user_id=self.user.id, feed_id=feed.id)
articles.append(article)
# return the feed with the list of retrieved articles
return feed, articles
jobs = []
pool = Pool(20)
jobs = [pool.spawn(fetch, feed) for feed in feeds]
pool.join()
return jobs
def insert_database(self, elements):
"""
Insert articles in the database.
"""
pyaggr3g470r_log.info("Database insertion...")
for feed, articles in elements:
for article in articles:
exist = Article.query.filter(Article.user_id == self.user.id, Article.feed_id == feed.id, Article.link == article.link).first()
if exist != None:
pyaggr3g470r_log.error("Article %s (%s) already in the database." % (article.title, article.link))
continue
try:
feed.articles.append(article)
#db.session.merge(article)
db.session.commit()
pyaggr3g470r_log.info("New article %s (%s) added." % (article.title, article.link))
except IntegrityError:
pyaggr3g470r_log.error("Article %s (%s) already in the database." % (article.title, article.link))
db.session.rollback()
continue
except Exception as e:
pyaggr3g470r_log.error("Error when inserting article in database: " + str(e))
continue
db.session.close()
return True
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