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#! /usr/bin/env python
#-*- coding: utf-8 -*-
# pyAggr3g470r - A Web based news aggregator.
# Copyright (C) 2010 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: 1.0 $"
__date__ = "$Date: 2010/09/02 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "GPLv3"
import os.path
import traceback
import sqlite3
import threading
import feedparser
from BeautifulSoup import BeautifulSoup
from datetime import datetime
import utils
import mongodb
feeds_list = []
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):
"""
Initializes the base and variables.
"""
# Create the base if not exists.
utils.create_base()
# MongoDB connections
self.articles = mongodb.Articles()
# mutex to protect the SQLite base
self.locker = threading.Lock()
def retrieve_feed(self):
"""
Parse the file 'feeds.lst' and launch a thread for each RSS feed.
"""
with open("./var/feed.lst") as f:
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):
"""Request the URL
Executed in a thread.
SQLite objects created in a thread can only be used in that same thread !
"""
# Protect this part of code.
self.locker.acquire()
self.conn = sqlite3.connect(utils.sqlite_base, isolation_level = None)
self.c = self.conn.cursor()
if utils.detect_url_errors([the_good_url]) == []:
# if ressource is available add the articles in the base.
self.add_into_sqlite(the_good_url)
self.conn.commit()
self.c.close()
# Release this part of code.
self.locker.release()
def add_into_sqlite(self, feed_link):
"""
Add the articles of the feed 'a_feed' in the SQLite base.
"""
a_feed = feedparser.parse(feed_link)
if a_feed['entries'] == []:
return
try:
feed_image = a_feed.feed.image.href
except:
feed_image = "/img/feed-icon-28x28.png"
collection_dic = {"collection_id": feed_link,\
"feed_image": feed_image, \
"feed_title": utils.clear_string(a_feed.feed.title.encode('utf-8')), \
"feed_link": feed_link, \
"site_title": a_feed.feed.link.encode('utf-8'), \
"mail": False \
}
self.articles.add_collection(collection_dic)
articles = []
for article in a_feed['entries']:
description = ""
try:
# article content
description = article.content[0].value
except AttributeError:
try:
# article description
description = article.description
except Exception, e:
description = ""
description = str(BeautifulSoup(description))
article_title = str(BeautifulSoup(article.title))
try:
post_date = datetime(*article.updated_parsed[:6])
except:
post_date = datetime(*article.published_parsed[:6])
article = {"article_id": article.link.encode('utf-8'), \
"article_date": post_date, \
"article_link": article.link.encode('utf-8'), \
"article_title": article_title, \
"article_content": description, \
"article_readed": False, \
"article_like": False \
}
articles.append(article)
self.articles.add_articles(articles, feed_link)
# send new articles by e-mail if desired.
#threading.Thread(None, utils.send_mail, None, (utils.mail_from, utils.mail_to, \
#a_feed.feed.title.encode('utf-8'), \
#article_title, description) \
#).start()
if __name__ == "__main__":
# Point of entry in execution mode
feed_getter = FeedGetter()
feed_getter.retrieve_feed()
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