#! /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
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 1.5 $"
__date__ = "$Date: 2010/12/07 $"
__revision__ = "$Date: 2013/07/24 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "GPLv3"
#
# This file provides functions used for:
# - the database management;
# - generation of tags cloud;
# - HTML processing;
# - e-mail notifications.
#
import os
import re
import glob
import operator
import calendar
from BeautifulSoup import BeautifulSoup
from collections import Counter
from contextlib import contextmanager
import conf
# regular expression to check URL
url_finders = [ \
re.compile("([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}|(((news|telnet|nttp|file|http|ftp|https)://)|(www|ftp)[-A-Za-z0-9]*\\.)[-A-Za-z0-9\\.]+)(:[0-9]*)?/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*[^]'\\.}>\\),\\\"]"), \
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\\.]+") \
]
#import log
#pyaggr3g470r_log = log.Log()
@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()
def open_url(url):
"""
Open an URL with the proxy and the user-agent
specified in the configuration file.
"""
if conf.HTTP_PROXY == "":
proxy = {}
else:
proxy = {"http" : conf.HTTP_PROXY}
opener = urllib.request.FancyURLopener(proxy)
try:
opener = urllib.request.build_opener()
opener.addheaders = [('User-agent', conf.USER_AGENT)]
return (True, opener.open(url))
except urllib.error.HTTPError as e:
# server couldn't fulfill the request
error = (url, e.code, \
http.server.BaseHTTPRequestHandler.responses[e.code][1])
#pyaggr3g470r_log.error(url + " " + str(e.code) + " " + http.server.BaseHTTPRequestHandler.responses[e.code][1])
return (False, error)
except urllib.error.URLError as e:
# failed to reach the server
if type(e.reason) == str:
error = (url, e.reason, e.reason)
#pyaggr3g470r_log.error(url + " " + e.reason)
else:
error = (url, e.reason.errno, e.reason.strerror)
#pyaggr3g470r_log.error(url + " " + str(e.reason.errno) + " " + e.reason.strerror)
return (False, error)
def clear_string(data):
"""
Clear a string by removing HTML tags, HTML special caracters
and consecutive white spaces (more that one).
"""
p = re.compile('<[^>]+>') # HTML tags
q = re.compile('\s') # consecutive white spaces
return p.sub('', q.sub(' ', data))
def normalize_filename(name):
"""
Normalize a file name.
"""
file_name = re.sub("[,'!?|&]", "", name)
file_name = re.sub("[\s.]", "_", file_name)
file_name = file_name.strip('_')
file_name = file_name.strip('.')
return os.path.normpath(file_name)
def load_stop_words():
"""
Load the stop words and return them in a list.
"""
stop_words_lists = glob.glob('./pyaggr3g470r/var/stop_words/*.txt')
stop_words = []
for stop_wods_list in stop_words_lists:
with opened_w_error(stop_wods_list, "r") as (stop_wods_file, err):
if err:
stop_words = []
else:
stop_words += stop_wods_file.read().split(";")
return stop_words
def top_words(articles, n=10, size=5):
"""
Return the n most frequent words in a list.
"""
stop_words = load_stop_words()
words = Counter()
wordre = re.compile(r'\b\w{%s,}\b' % size, re.I)
for article in articles:
for word in [elem.lower() for elem in
wordre.findall(clear_string(article.content)) \
if elem.lower() not in stop_words]:
words[word] += 1
return words.most_common(n)
def tag_cloud(tags, query="word_count"):
"""
Generates a tags cloud.
"""
tags.sort(key=operator.itemgetter(0))
if query == "word_count":
# tags cloud from the management page
return ' '.join([('%s\n' % \
(min(1 + count * 7 / max([tag[1] for tag in tags]), 7), word, format(count, ',d'), word)) \
for (word, count) in tags])
if query == "year":
# tags cloud for the history
return ' '.join([('%s\n' % \
(min(1 + count * 7 / max([tag[1] for tag in tags]), 7), query, word, format(count, ',d'), word)) \
for (word, count) in tags])
return ' '.join([('%s\n' % \
(min(1 + count * 7 / max([tag[1] for tag in tags]), 7), query, word, format(count, ',d'), calendar.month_name[int(word)])) \
for (word, count) in tags])
def search_feed(url):
"""
Search a feed in a HTML page.
"""
soup, page = None, None
try:
result = open_url(url)
if result[0] == True:
page = open_url(url)[1]
else:
return None
soup = BeautifulSoup(page)
except:
return None
feed_links = soup('link', type='application/atom+xml')
feed_links.extend(soup('link', type='application/rss+xml'))
for feed_link in feed_links:
#if url not in feed_link['href']:
#return urllib.parse.urljoin(url, feed_link['href'])
return feed_link['href']
return None