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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: 1.7 $"
__date__ = "$Date: 2010/09/02 $"
__revision__ = "$Date: 2013/08/11 $"
__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
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})
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:
print("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.detect_url_errors([the_good_url]) == []:
# 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)
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:
print("Problem when sanitizing the content of the feed: " + feed_link)
print(E)
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
search.add_to_index([article], feed)
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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