#! /usr/bin/env python
#-*- coding: utf-8 -*-
# pyAggr3g470r - A Web based news aggregator.
# Copyright (C) 2010-2012 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: 1.2 $"
__date__ = "$Date: 2010/12/07 $"
__revision__ = "$Date: 2012/05/01 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "GPLv3"
#
# This file provides functions used for:
# - the database management;
# - generation of tags cloud;
# - HTML processing;
# - mail notifications.
#
import os
import re
import operator
import urlparse
import calendar
import unicodedata
import htmlentitydefs
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import urllib2
import BaseHTTPServer
from BeautifulSoup import BeautifulSoup
from datetime import datetime
from collections import Counter
import conf
# regular expression to chech URL
url_finders = [ \
re.compile("([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}|(((news|telnet|nttp|file|http|ftp|https)://)|(www|ftp)[-A-Za-z0-9]*\\.)[-A-Za-z0-9\\.]+)(:[0-9]*)?/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*[^]'\\.}>\\),\\\"]"), \
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\\.]+"), \
]
def detect_url_errors(list_of_urls):
"""
Detect URL errors.
Return a list of error(s).
"""
errors = []
for url in list_of_urls:
req = urllib2.Request(url)
try:
urllib2.urlopen(req)
except urllib2.HTTPError, e:
# server couldn't fulfill the request
errors.append((url, e.code, \
BaseHTTPServer.BaseHTTPRequestHandler.responses[e.code][1]))
except urllib2.URLError, e:
# failed to reach the server
errors.append((url, e.reason.errno ,e.reason.strerror))
return errors
def clear_string(data):
"""
Clear a string by removing HTML tags, HTML special caracters
and consecutive white spaces (more that one).
"""
p = re.compile(r'<[^<]*?/?>') # HTML tags
q = re.compile(r'\s') # consecutive white spaces
return p.sub('', q.sub(' ', data))
def unescape(text):
"""
Removes HTML or XML character references and entities from a text string.
"""
def fixup(m):
text = m.group(0)
if text[:2] == "&#":
# character reference
try:
if text[:3] == "&#x":
return unichr(int(text[3:-1], 16))
else:
return unichr(int(text[2:-1]))
except ValueError:
pass
else:
# named entity
try:
text = unichr(htmlentitydefs.name2codepoint[text[1:-1]])
except KeyError:
pass
return text # leave as is
return re.sub("&#?\w+;", fixup, text)
def not_combining(char):
return unicodedata.category(char) != 'Mn'
def strip_accents(text, encoding):
"""
Strip accents.
>>> print strip_accents("déjà", "utf-8")
deja
"""
unicode_text= unicodedata.normalize('NFD', text.decode(encoding))
return filter(not_combining, unicode_text).encode(encoding)
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('.')
file_name = strip_accents(file_name, "utf-8")
return os.path.normpath(file_name)
def top_words(articles, n=10, size=5):
"""
Return the n most frequent words in a list.
"""
words = Counter()
wordre = re.compile(r'\b\w{%s,}\b' % size, re.I)
for article in articles:
for word in wordre.findall(clear_string(article["article_content"])):
words[word.lower()] += 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, count, 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, count, word)) \
for (word, count) in tags])
return ' '.join([('%s\n' % \
(min(1 + count * 7 / max([tag[1] for tag in tags]), 7), query, word, count, calendar.month_name[int(word)])) \
for (word, count) in tags])
def send_mail(mfrom, mto, feed_title, article_title, description):
"""
Send the article via mail.
"""
# Create the body of the message (a plain-text and an HTML version).
html = """\n\n%s\n\n\n%s\n\n""" % \
(feed_title + ": " + article_title, description)
text = clear_string(description)
# Create message container - the correct MIME type is multipart/alternative.
msg = MIMEMultipart('alternative')
msg['Subject'] = '[pyAggr3g470r] ' + feed_title + ": " + article_title
msg['From'] = mfrom
msg['To'] = mto
# Record the MIME types of both parts - text/plain and text/html.
part1 = MIMEText(text, 'plain')
part2 = MIMEText(html, 'html')
# Attach parts into message container.
# According to RFC 2046, the last part of a multipart message, in this case
# the HTML message, is best and preferred.
msg.attach(part1)
msg.attach(part2)
# Send the message via local SMTP server.
s = smtplib.SMTP(conf.smtp_server)
s.login(conf.username, conf.password)
# sendmail function takes 3 arguments: sender's address, recipient's address
# and message to send - here it is sent as one string.
s.sendmail(mfrom, mto, msg.as_string())
s.quit()
def string_to_datetime(stringtime):
"""
Convert a string to datetime.
"""
date, time = stringtime.split(' ')
year, month, day = date.split('-')
hour, minute, second = time.split(':')
return datetime(year=int(year), month=int(month), day=int(day), \
hour=int(hour), minute=int(minute), second=int(second))
def compare(stringtime1, stringtime2):
"""
Compare two dates in the format 'yyyy-mm-dd hh:mm:ss'.
"""
datetime1 = string_to_datetime(stringtime1)
datetime2 = string_to_datetime(stringtime2)
if datetime1 < datetime2:
return -1
elif datetime1 > datetime2:
return 1
return 0
def add_feed(feed_url):
"""
Add the URL feed_url in the file feed.lst.
"""
if os.path.exists("./var/feed.lst"):
for line in open("./var/feed.lst", "r"):
if feed_url in line:
# if the feed is already in the file
return False
with open("./var/feed.lst", "a") as f:
f.write(feed_url + "\n")
return True
def change_feed_url(old_feed_url, new_feed_url):
"""
Change the URL of a feed given in parameter.
"""
# Replace the URL in the text file
with open("./var/feed.lst", "r") as f:
lines = f.readlines()
lines = map(str.strip, lines)
try:
lines[lines.index(old_feed_url)] = new_feed_url
except:
return
with open("./var/feed.lst", "w") as f:
f.write("\n".join(lines))
def remove_feed(feed_url):
"""
Remove a feed from the file feed.lst and from the SQLite base.
"""
feeds = []
# Remove the URL from the file feed.lst
if os.path.exists("./var/feed.lst"):
for line in open("./var/feed.lst", "r"):
if feed_url not in line:
feeds.append(line.replace("\n", ""))
with open("./var/feed.lst", "w") as f:
f.write("\n".join(feeds) + "\n")
def search_feed(url):
"""
Search a feed in a HTML page.
"""
soup = None
try:
page = urllib2.urlopen(url)
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 urlparse.urljoin(url, feed_link['href'])
return feed_link['href']
return None