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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: 1.8 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2013/08/15 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "GPLv3"
import hashlib
import threading
import urllib.request
import feedparser
from bs4 import BeautifulSoup
from datetime import datetime
from contextlib import contextmanager
import conf
import search
import utils
import mongodb
import log
pyaggr3g470r_log = log.Log()
list_of_threads = []
@contextmanager
def opened_w_error(filename, mode="r"):
try:
f = open(filename, mode)
except IOError as err:
yield None, err
else:
try:
yield f, None
finally:
f.close()
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):
"""
Initializes the database connection.
"""
# MongoDB connections
self.articles = mongodb.Articles(conf.MONGODB_ADDRESS, conf.MONGODB_PORT, \
conf.MONGODB_DBNAME, conf.MONGODB_USER, conf.MONGODB_PASSWORD)
if conf.HTTP_PROXY == "":
self.proxy = urllib.request.ProxyHandler({})
else:
self.proxy = urllib.request.ProxyHandler({"http" : conf.HTTP_PROXY})
feedparser.USER_AGENT = conf.USER_AGENT
def retrieve_feed(self, feed_url=None, feed_original=None):
"""
Parse the file 'feeds.lst' and launch a thread for each RSS feed.
"""
if feed_url != None:
self.process(feed_url, feed_original)
else:
with opened_w_error(conf.FEED_LIST) as (f, err):
if err:
pyaggr3g470r_log.error("List of feeds not found.")
else:
for a_feed in f:
# test if the URL is well formed
for url_regexp in utils.url_finders:
if url_regexp.match(a_feed):
the_good_url = url_regexp.match(a_feed).group(0).replace("\n", "")
try:
# launch a new thread for the RSS feed
thread = threading.Thread(None, self.process, \
None, (the_good_url,))
thread.start()
list_of_threads.append(thread)
except:
pass
break
# wait for all threads are done
for th in list_of_threads:
th.join()
def process(self, the_good_url, feed_original=None):
"""Request the URL
Executed in a thread.
"""
if utils.open_url(the_good_url)[0] == True:
# if ressource is available add the articles in the base.
self.add_into_database(the_good_url, feed_original)
def add_into_database(self, feed_link, feed_original=None):
"""
Add the articles of the feed 'a_feed' in the SQLite base.
"""
a_feed = feedparser.parse(feed_link, handlers = [self.proxy])
if a_feed['entries'] == []:
return
try:
feed_image = a_feed.feed.image.href
except:
feed_image = "/img/feed-icon-28x28.png"
if feed_original != None:
feed_link = feed_original
sha1_hash = hashlib.sha1()
sha1_hash.update(feed_link.encode('utf-8'))
feed_id = sha1_hash.hexdigest()
feed = self.articles.get_feed(feed_id)
if None == feed:
collection_dic = {"feed_id": feed_id, \
"type": 0, \
"feed_image": feed_image, \
"feed_title": utils.clear_string(a_feed.feed.title), \
"feed_link": feed_link, \
"site_link": a_feed.feed.link, \
"mail": False \
}
self.articles.add_collection(collection_dic)
feed = self.articles.get_feed(feed_id)
articles = []
for article in a_feed['entries']:
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 feed: " + feed_link)
article_title = article.title
try:
post_date = datetime(*article.published_parsed[:6])
except:
post_date = datetime(*article.updated_parsed[:6])
sha1_hash = hashlib.sha1()
sha1_hash.update(article.link.encode('utf-8'))
article_id = sha1_hash.hexdigest()
article = {"article_id": article_id, \
"type":1, \
"article_date": post_date, \
"article_link": article.link, \
"article_title": article_title, \
"article_content": description, \
"article_readed": False, \
"article_like": False \
}
articles.append(article)
if self.articles.get_articles(feed_id, article_id) == []:
# add the article to the Whoosh index
try:
search.add_to_index([article], feed)
except:
print("Whoosh error.")
pyaggr3g470r_log.error("Whoosh error.")
continue
if conf.MAIL_ENABLED and feed["mail"]:
# if subscribed to the feed
threading.Thread(None, utils.send_mail, None, (conf.mail_from, conf.mail_to, \
a_feed.feed.title, \
article_title, description)).start()
self.articles.add_articles(articles, feed_id)
if __name__ == "__main__":
# Point of entry in execution mode
feed_getter = FeedGetter()
# Retrieve all feeds
feed_getter.retrieve_feed()
# If you want to get all articles of a blog:
"""
for i in range(1,86):
feed_original = "http://esr.ibiblio.org/?feed=rss2"
feed = feed_original + "&paged=" + str(i)
print("Retrieving", feed, "...")
feed_getter.retrieve_feed(feed, feed_original)
"""
"""
for i in range(1,5):
feed_original = "http://spaf.wordpress.com/feed/"
feed = feed_original + "?paged=" + str(i)
print("Retrieving", feed, "...")
feed_getter.retrieve_feed(feed, feed_original)
"""
# For a blogspot blog:
#feed_getter.retrieve_feed("http://www.blogger.com/feeds/4195135246107166251/posts/default", "http://neopythonic.blogspot.com/feeds/posts/default")
#feed_getter.retrieve_feed("http://www.blogger.com/feeds/8699431508730375743/posts/default", "http://python-history.blogspot.com/feeds/posts/default")
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