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#! /usr/local/bin/python
#-*- coding: utf-8 -*-
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.2 $"
__date__ = "$Date: 2010/31/01 $"
__copyright__ = "Copyright (c) 2010 Cedric Bonhomme"
__license__ = "GPLv3"
import re
import sqlite3
import hashlib
import threading
import feedparser
from datetime import datetime
url_finders = [ \
re.compile("([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}|(((news|telnet|nttp|file|http|ftp|https)://)|(www|ftp)[-A-Za-z0-9]*\\.)[-A-Za-z0-9\\.]+)(:[0-9]*)?/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*[^]'\\.}>\\),\\\"]"), \
re.compile("([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}|(((news|telnet|nttp|file|http|ftp|https)://)|(www|ftp)[-A-Za-z0-9]*\\.)[-A-Za-z0-9\\.]+)(:[0-9]*)?"), \
re.compile("(~/|/|\\./)([-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]|\\\\)+"), \
re.compile("'\\<((mailto:)|)[-A-Za-z0-9\\.]+@[-A-Za-z0-9\\.]+"), \
]
feeds_list = []
list_of_threads = []
class FeedGetter(object):
"""
"""
def __init__(self):
"""
Initializes the base and variables.
"""
# Create the base if not exists.
self.conn = sqlite3.connect("./var/feed.db", isolation_level = None)
self.c = self.conn.cursor()
self.c.execute('''create table if not exists rss_feed
(article_id text PRIMARY KEY, article_date text, \
article_title text, article_link text, article_description text, \
feed_title text, feed_site_link text)''')
self.conn.commit()
self.c.close()
# 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.
"""
for a_feed in feeds_file.readlines():
# test if the URL is well formed
for url_regexp in 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("./var/feed.db", isolation_level = None)
self.c = self.conn.cursor()
# Add the articles in the base.
self.add_into_sqlite(feedparser.parse(the_good_url))
self.conn.commit()
self.c.close()
# Release this part of code.
self.locker.release()
def add_into_sqlite(self, a_feed):
"""
Add the articles of the feed 'a_feed' in the SQLite base.
"""
for article in a_feed['entries']:
try:
description = article.description.encode('utf-8')
except Exception, e:
description = "No description available."
sha256_hash = hashlib.sha256()
sha256_hash.update(article.link.encode('utf-8'))
article_id = sha256_hash.hexdigest()
try:
self.c.execute('insert into rss_feed values (?,?,?,?,?,?,?)', (\
article_id, \
datetime(*article.updated_parsed[:6]), \
article.title.encode('utf-8'), \
article.link.encode('utf-8'), \
description, \
a_feed.feed.title.encode('utf-8'), \
a_feed.feed.link.encode('utf-8')))
except sqlite3.IntegrityError:
pass
if __name__ == "__main__":
# Point of entry in execution mode
try:
feeds_file = open("./var/feed.lst")
except:
print "./feed.lst not found"
exit(0)
feed_getter = FeedGetter()
feed_getter.retrieve_feed()
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