#!/usr/bin/python3
import argparse
from configparser import ConfigParser
import mailbox
import os.path
import re
import shutil
import subprocess
import sys
import urllib.error
import urllib.parse
import urllib.request
#from concurrent.futures import ProcessPoolExecutor
from bs4 import BeautifulSoup
import logging
logging.basicConfig(format='%(levelname)s:%(funcName)s:%(message)s',
level=logging.INFO)
ADDR_SEC_LABEL = 'addresses'
MANGLED_ADDR_RE = re.compile(
r'([a-zA-Z0-9_.+-]+\.\.\.@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+)',
re.IGNORECASE)
class Page(object):
verb_handler = urllib.request.HTTPHandler()
if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
verb_handler.set_http_debuglevel(2)
redir_handler = urllib.request.HTTPRedirectHandler()
opener = urllib.request.build_opener(verb_handler, redir_handler)
def __init__(self):
pass
@staticmethod
def unenscape_Google_bang_URL(old_URL):
"""
See https://developers.google.com/webmasters\
/ajax-crawling/docs/getting-started for more information
"""
if old_URL.find('#!') != -1:
esc_URL = old_URL.replace('#!', '?_escaped_fragment_=')
return esc_URL
else:
return old_URL
@classmethod
def do_redirect(cls, URL):
res = cls.opener.open(URL)
if res.getcode() == 200:
new_URL = res.geturl()
return cls.unenscape_Google_bang_URL(new_URL)
else:
raise urllib.error.HTTPError('Unknown URL: {}'.format(URL))
def _get_page_BS(self, URL):
res = self.opener.open(self.do_redirect(URL))
in_str = res.read()
bs = BeautifulSoup(in_str)
res.close()
return bs
class Article(Page):
def __init__(self, URL):
super(Article, self).__init__()
self.root = URL.replace('d/msg/', 'forum/message/raw?msg=')
self.raw_message = ''
def collect_message(self):
with self.opener.open(self.root) as res:
raw_msg = res.read()
proc = subprocess.Popen(['/usr/bin/formail'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
universal_newlines=True)
result = proc.communicate(raw_msg.decode())[0]
return result
class Topic(Page):
def __init__(self, URL, name):
super(Topic, self).__init__()
self.name = name
self.root = self.do_redirect(URL)
self.articles = []
def __unicode__(self):
return "%s: %s" % (self.root, self.name)
@staticmethod
def get_one_article(elem):
return elem
def get_count_articles(self):
'''Get total number of articles from the number on the page
itself.
'''
BS = self._get_page_BS(self.root)
i_elem = BS.find_all('i')
if len(i_elem) <= 0:
raise ValueError('Cannot find count of topics!')
i_str = i_elem[0].string
return int(re.match(r'\D+ \d+\D+\d+ \D+ (\d+) \D+$', i_str).group(1))
def get_articles(self):
out = []
page = self._get_page_BS(self.root)
for a_elem in page.find_all('a'):
if 'href' in a_elem.attrs:
a_href = a_elem['href']
if re.match(r'https://groups.google.com/d/msg/',
a_href) is not None:
out.append(Article(a_href))
return out
class Group(Page):
def __init__(self, URL):
super(Group, self).__init__()
self.group_URL = URL
self.topics = []
match = re.match(r'https://groups.google.com/forum/#!forum/(.+)',
URL)
if match is not None:
self.name = match.group(1)
@staticmethod
def get_count_topics(BS):
'''Get total number of topics from the number on the page
itself.
Which would be awesome for control, except it is wrong on all
pages in various and different ways. :(
'''
i_elem = BS.find_all('i')
if len(i_elem) <= 0:
raise ValueError('Cannot find count of topics!')
i_str = i_elem[0].string
return int(re.match(r'\D+ \d+ - \d+ \D+ (\d+) \D+$', i_str).group(1))
@staticmethod
def get_one_topic(elem):
sys.stdout.write('. ')
sys.stdout.flush()
if 'title' in elem.attrs:
# filter out all-non-topic <a>s
return True, Topic(elem['href'], elem['title'])
else:
logging.debug('other = %s', elem)
return False, elem
def get_topics(self):
'''Recursively[?] get all topic (as special objects)
Also return (for error checking) number of topics from the head
of the topic page.
'''
out = []
other = []
BS = self._get_page_BS(self.group_URL)
for a_elem in BS.find_all('a'):
is_topic, res = self.get_one_topic(a_elem)
if is_topic:
out.append(res)
else:
other.append(res)
if len(other) == 1:
new_bs = Group(other[0]['href'])
out.extend(new_bs.get_topics())
elif len(other) != 0:
raise ValueError(
'There must be either one or none link to the next page!')
sys.stdout.write('\n')
sys.stdout.flush()
return out
def collect_group(self):
self.topics = self.get_topics()
len_topics = len(self.topics)
for top in self.topics:
print('[%d/%d] downloading "%s"' % (self.topics.index(top),
len_topics, top.name))
arts = top.get_articles()
top.articles = arts
for a in arts:
msg = a.collect_message()
a.raw_message = msg
def all_messages(self):
'''Iterate over all messages in the group'''
for top in self.topics:
for art in top.articles:
yield art.raw_message
def collect_mangled_addrs(self):
addrs = set()
for top in self.topics:
for art in top.articles:
msg_str = art.raw_message
# see http://stackoverflow.com/questions/201323
msg_matches = MANGLED_ADDR_RE.findall(msg_str)
if msg_matches is not None:
for mtch in msg_matches:
addrs.add(mtch)
addrs = sorted(list(addrs))
with open('{}.cnf'.format(self.name), 'w') as cnf_f:
cnf_p = ConfigParser()
cnf_p.add_section(ADDR_SEC_LABEL)
for addr in addrs:
cnf_p.set(ADDR_SEC_LABEL, addr, '')
cnf_p.write(cnf_f)
class MBOX(mailbox.mbox):
def __init__(self, filename):
if os.path.exists(filename):
shutil.move(filename, '{}.bak'.format(filename))
super(MBOX, self).__init__(filename)
self.box_name = filename
def write_group(self, group_object):
self.lock()
for mbx_str in group_object.all_messages():
self.add(mbx_str.encode())
self.unlock()
self.close()
def main(group_URL):
# Collect all messages to the internal variables
grp = Group(group_URL)
grp.collect_group()
#import yaml
# dump the state for debugging
#with open('group.yaml', 'w') as yf:
# yaml.dump(grp, yf)
# Write MBOX
mbx = MBOX("{}.mbx".format(grp.name))
mbx.write_group(grp)
# generate list of addresses protected against spammers
grp.collect_mangled_addrs()
def demangle(correct_list, orig_mbx, out_mbx):
cnf_p = ConfigParser()
cnf_p.read(correct_list)
pairs = dict(cnf_p.items(ADDR_SEC_LABEL))
if os.path.exists(out_mbx):
shutil.move(out_mbx, '{}.bak'.format(out_mbx))
in_mbx = mailbox.mbox(orig_mbx)
out_mbx = mailbox.mbox(out_mbx)
out_mbx.lock()
for msg in in_mbx.itervalues():
msg_str = str(msg)
matches = MANGLED_ADDR_RE.search(msg_str)
if matches is not None:
u_from = msg.get_from()
for orig, fixed in pairs.items():
msg_str = msg_str.replace(orig, fixed)
out_msg = mailbox.mboxMessage(msg_str)
out_msg.set_from(u_from)
out_mbx.add(out_msg)
else:
out_mbx.add(msg)
out_mbx.close()
in_mbx.close()
if __name__ == '__main__':
parser = argparse.ArgumentParser(description=
'Scrape a Google Groups group.')
parser.add_argument('group', metavar='URL', nargs='?',
help='URL of the group')
parser.add_argument('-d', '--demangle', metavar='DEMANGLE_FILE', nargs=3,
help='Demangle mbox from stdin to stdout' +
'according to the values in the configuration' +
'file.')
args = parser.parse_args()
logging.debug('args = {}'.format(args))
if args.demangle is not None:
demangle(args.demangle[0], args.demangle[1], args.demangle[2])
else:
main(args.group)
