# Twisted, the Framework of Your Internet
# Copyright (C) 2001 Matthew W. Lefkowitz
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
Maintainer: U{Jp Calderone<mailto:exarkun@twistedmatrix.com>}
Stability: semi-stable
"""
from twisted.protocols import nntp
from twisted.internet import protocol,reactor
import time
class NNTPFactory(protocol.ServerFactory):
"""A factory for NNTP server protocols."""
protocol = nntp.NNTPServer
def __init__(self, backend):
self.backend = backend
def buildProtocol(self, connection):
p = self.protocol()
p.factory = self
return p
class UsenetClientFactory(protocol.ClientFactory):
def __init__(self, groups, storage):
self.lastChecks = {}
self.groups = groups
self.storage = storage
def clientConnectionLost(self, connector, reason):
pass
def clientConnectionFailed(self, connector, reason):
print 'Connection failed: ', reason
def updateChecks(self, addr):
self.lastChecks[addr] = time.mktime(time.gmtime())
def buildProtocol(self, addr):
last = self.lastChecks.setdefault(addr, time.mktime(time.gmtime()) - (60 * 60 * 24 * 7))
p = nntp.UsenetClientProtocol(self.groups, last, self.storage)
p.factory = self
return p
# XXX - Maybe this inheritence doesn't make so much sense?
class UsenetServerFactory(NNTPFactory):
"""A factory for NNTP Usenet server protocols."""
protocol = nntp.NNTPServer
def __init__(self, backend, remoteHosts = None, updatePeriod = 60):
NNTPFactory.__init__(self, backend)
self.updatePeriod = updatePeriod
self.remoteHosts = remoteHosts or []
self.clientFactory = UsenetClientFactory(self.remoteHosts, self.backend)
def startFactory(self):
self._updateCall = reactor.callLater(0, self.syncWithRemotes)
def stopFactory(self):
if self._updateCall:
self._updateCall.cancel()
self._updateCall = None
def buildProtocol(self, connection):
p = self.protocol()
p.factory = self
return p
def syncWithRemotes(self):
for remote in self.remoteHosts:
reactor.connectTCP(remote, 119, self.clientFactory)
self._updateCall = reactor.callLater(self.updatePeriod, self.syncWithRemotes)
# backwards compatability
Factory = UsenetServerFactory
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