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"""News to mail gateway script. Copyright 2000 Cosimo Alfarano
Author: Cosimo Alfarano
Date: June 11 2000
whitelist.py - (C) 2000 by Cosimo Alfarano <Alfarano@Students.CS.UniBo.It>
You can use this software under the terms of the GPL. If we meet some day,
and you think this stuff is worth it, you can buy me a beer in return.
Thanks to md for this useful formula. Beer is beer.
whitelist manage a list of trusted user.
"""
import logging
# logging.basicConfig(level=logging.DEBUG)
import sys
import time
import wlp
class whitelist(object):
"""whitelist handling class
Do you really want anyone can post? Ah ah ah.
"""
wl = {}
# constants
DENY = 0
ACCEPT = 1
def __init__(self, wlfile, logfile='pyg.log'):
self.logger = logging.getLogger(__name__)
self.logger.setLevel(logging.INFO)
log_fh = logging.FileHandler(logfile)
log_fmt = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s - %(message)s')
log_fh.setFormatter(log_fmt)
self.logger.addHandler(log_fh)
try:
wlp.setfilebyname(wlfile)
except Exception as ex:
self.logger.exception('Opening %s: %s', wlfile, ex)
sys.exit(1)
# dict is a { ownername : {variable: value}} dictionary of dictionaries
self.wl = wlp.mkdict()
def checkfrom(self, fromhead):
"""have you permission to be here, sir?"""
for owner in self.wl:
# here colon after 'From' IS required, because binary module wl
# expects it.
# TODO: when switching to the python lexxing, remove this
# limitation.
if fromhead.find(self.wl[owner]['From:']) >= 0:
return owner
else:
return None
def logmsg(self, heads, ok=DENY, owner=None):
"""who are walking through my gate?
"""
ltime = time.ctime(time.time())
if time.daylight:
tzone = time.tzname[1]
else:
tzone = time.tzname[0]
if ok == self.ACCEPT:
self.logger.info('Permission Accorded ')
else:
self.logger.info('Permission Denied ')
self.logger.info('at %s (%s)', ltime, tzone)
if owner is not None:
self.logger.debug('\tWLOwner: ' + owner + '')
self.logger.debug('\tFrom: ' + heads.get('From', 'NOT PRESENT'))
self.logger.debug('\tSubject: ' + heads.get('Subject', 'NOT PRESENT'))
self.logger.debug('\tSender: ' + heads.get('Sender', 'NOT PRESENT'))
self.logger.debug('\tDate: ' + heads.get('Date', 'NOT PRESENT'))
# some client create Message-Id other Message-ID.
if 'Message-ID' in heads:
self.logger.debug('\tMessage-ID: ' + heads.get('Message-ID'))
else:
self.logger.debug('\tMessage-Id: ' + heads.get('Message-Id',
'NOT PRESENT'))
# X-Newsgroups: and To: are present if user is trusted, else
# Newsgroup: exists since no changes on nntp headers are done.
if 'X-Newsgroups' in heads:
self.logger.debug('\tTo: ' + heads.get('To', 'NOT PRESENT'))
self.logger.debug('\tX-Newsgroups: ' + heads.get('X-Newsgroups',
'NOT PRESENT'))
else:
self.logger.debug('\tNewsgroups: ' +
heads.get('Newsgroups', 'NOT PRESENT'))
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