mirror of https://github.com/sileht/bird-lg.git
102 lines
2.4 KiB
Python
102 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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# vim: ts=4
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###
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#
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# Copyright (c) 2006 Mehdi Abaakouk
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3 as
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# published by the Free Software Foundation
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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#
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###
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from dns import resolver
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import socket
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import pickle
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import xml.parsers.expat
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dns_cache = resolver.LRUCache(max_size=10000)
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resolv = resolver.Resolver()
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resolv.timeout = 0.5
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resolv.lifetime = 1
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resolv.cache = dns_cache
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def resolve(n, q):
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return str(resolv.query(n,q)[0])
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def mask_is_valid(n):
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if not n:
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return True
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try:
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mask = int(n)
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return ( mask >= 1 and mask <= 128)
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except:
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return False
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def ipv4_is_valid(n):
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try:
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socket.inet_pton(socket.AF_INET, n)
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return True
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except socket.error:
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return False
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def ipv6_is_valid(n):
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try:
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socket.inet_pton(socket.AF_INET6, n)
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return True
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except socket.error:
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return False
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def save_cache_pickle(filename, data):
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output = open(filename, 'wb')
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pickle.dump(data, output)
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output.close()
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def load_cache_pickle(filename, default = None):
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try:
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pkl_file = open(filename, 'rb')
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except IOError:
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return default
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try:
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data = pickle.load(pkl_file)
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except:
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data = default
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pkl_file.close()
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return data
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def unescape(s):
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want_unicode = False
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if isinstance(s, unicode):
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s = s.encode("utf-8")
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want_unicode = True
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# the rest of this assumes that `s` is UTF-8
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list = []
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# create and initialize a parser object
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p = xml.parsers.expat.ParserCreate("utf-8")
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p.buffer_text = True
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p.returns_unicode = want_unicode
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p.CharacterDataHandler = list.append
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# parse the data wrapped in a dummy element
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# (needed so the "document" is well-formed)
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p.Parse("<e>", 0)
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p.Parse(s, 0)
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p.Parse("</e>", 1)
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# join the extracted strings and return
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es = ""
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if want_unicode:
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es = u""
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return es.join(list)
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