mirror of
https://github.com/Hopiu/linkchecker.git
synced 2026-03-19 15:30:29 +00:00
e9805dbd8a
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@3887 e7d03fd6-7b0d-0410-9947-9c21f3af8025
41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
# -*- coding: iso-8859-1 -*-
|
|
# Copyright (C) 2006-2009 Bastian Kleineidam
|
|
#
|
|
# 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 2 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, write to the Free Software
|
|
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
"""
|
|
Cache for DNS lookups.
|
|
"""
|
|
import socket
|
|
import sys
|
|
from ..lock import get_lock
|
|
from ..decorators import synchronized
|
|
|
|
_lock = get_lock("addrinfo")
|
|
addrinfos = {}
|
|
|
|
@synchronized(_lock)
|
|
def getaddrinfo (host, port):
|
|
key = str(host) + u":" + str(port)
|
|
if key not in addrinfos:
|
|
try:
|
|
addrinfos[key] = \
|
|
socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM)
|
|
except socket.error:
|
|
addrinfos[key] = sys.exc_info()[1]
|
|
value = addrinfos[key]
|
|
if isinstance(value, Exception):
|
|
raise value
|
|
return value
|
|
|