mirror of
https://github.com/Mikaela/Limnoria.git
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668 lines
24 KiB
Python
668 lines
24 KiB
Python
#!/usr/bin/env python
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###
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# Copyright (c) 2002, Jeremiah Fincher
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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__revision__ = "$Id$"
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import fix
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import copy
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import sets
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import time
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from itertools import imap, chain, cycle
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import log
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import conf
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import utils
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import world
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import ircdb
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import ircmsgs
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import ircutils
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from structures import queue, smallqueue, RingBuffer
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###
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# The base class for a callback to be registered with an Irc object. Shows
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# the required interface for callbacks -- name(),
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# inFilter(irc, msg), outFilter(irc, msg), and __call__(irc, msg) [used so
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# functions can be used as callbacks conceivable, and so if refactoring ever
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# changes the nature of the callbacks from classes to functions, syntactical
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# changes elsewhere won't be required.
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###
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class IrcCommandDispatcher(object):
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"""Base class for classes that must dispatch on a command."""
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def dispatchCommand(self, command):
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"""Given a string 'command', dispatches to doCommand."""
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return getattr(self, 'do' + command.capitalize(), None)
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class IrcCallback(IrcCommandDispatcher):
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"""Base class for standard callbacks.
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Callbacks derived from this class should have methods of the form
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"doCommand" -- doPrivmsg, doNick, do433, etc. These will be called
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on matching messages.
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"""
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# priority determines the order in which callbacks are called. Lower
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# numbers mean *higher* priority (like nice values in *nix). Higher
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# priority means the callback is called *earlier* on the inFilter chain,
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# *earlier* on the __call__ chain, and *later* on the outFilter chain.
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priority = 99
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def name(self):
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"""Returns the name of the callback."""
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return self.__class__.__name__
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def inFilter(self, irc, msg):
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"""Used for filtering/modifying messages as they're entering.
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ircmsgs.IrcMsg objects are immutable, so this method is expected to
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return another ircmsgs.IrcMsg object. Obviously the same IrcMsg
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can be returned.
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"""
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return msg
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def outFilter(self, irc, msg):
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"""Used for filtering/modifying messages as they're leaving.
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As with inFilter, an IrcMsg is returned.
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"""
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return msg
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def __call__(self, irc, msg):
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"""Used for handling each message."""
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method = self.dispatchCommand(msg.command)
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if method is not None:
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try:
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method(irc, msg)
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except Exception, e:
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s = 'Exception caught in generic IrcCallback.__call__:'
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log.exception(s)
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def reset(self):
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"""Resets the callback. Called when reconnecting to the server."""
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pass
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def die(self):
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"""Makes the callback die. Called when the parent Irc object dies."""
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pass
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###
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# Basic queue for IRC messages. It doesn't presently (but should at some
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# later point) reorder messages based on priority or penalty calculations.
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###
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_high = sets.ImmutableSet(['MODE', 'KICK', 'PONG', 'NICK', 'PASS'])
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_low = sets.ImmutableSet(['PRIVMSG', 'PING', 'WHO', 'NOTICE'])
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class IrcMsgQueue(object):
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"""Class for a queue of IrcMsgs. Eventually, it should be smart.
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Probably smarter than it is now, though it's gotten quite a bit smarter
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than it originally was. A method to "score" methods, and a heapq to
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maintain a priority queue of the messages would be the ideal way to do
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intelligent queueing.
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As it stands, however, we simple keep track of 'high priority' messages,
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'low priority' messages, and normal messages, and just make sure to return
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the 'high priority' ones before the normal ones before the 'low priority'
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ones.
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"""
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__slots__ = ('msgs', 'highpriority', 'normal', 'lowpriority')
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def __init__(self, iterable=()):
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self.reset()
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for msg in iterable:
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self.enqueue(msg)
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def reset(self):
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"""Clears the queue."""
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self.highpriority = smallqueue()
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self.normal = smallqueue()
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self.lowpriority = smallqueue()
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self.msgs = sets.Set()
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def enqueue(self, msg):
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"""Enqueues a given message."""
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if msg in self.msgs:
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log.warning('Not adding message %r to queue, already added.' % msg)
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else:
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self.msgs.add(msg)
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if msg.command in _high:
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self.highpriority.enqueue(msg)
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elif msg.command in _low:
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self.lowpriority.enqueue(msg)
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else:
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self.normal.enqueue(msg)
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def dequeue(self):
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"""Dequeues a given message."""
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msg = None
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if self.highpriority:
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msg = self.highpriority.dequeue()
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elif self.normal:
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msg = self.normal.dequeue()
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elif self.lowpriority:
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msg = self.lowpriority.dequeue()
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if msg:
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try:
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self.msgs.remove(msg)
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except KeyError:
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s = 'Odd, dequeuing a message that\'s not in self.msgs.'
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log.warning(s)
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return msg
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def __nonzero__(self):
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return bool(self.highpriority or self.normal or self.lowpriority)
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def __len__(self):
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return sum(imap(len,[self.highpriority,self.lowpriority,self.normal]))
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def __repr__(self):
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name = self.__class__.__name__
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return '%s(%r)' % (name, list(chain(self.highpriority,
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self.normal,
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self.lowpriority)))
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__str__ = __repr__
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###
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# Maintains the state of IRC connection -- the most recent messages, the
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# status of various modes (especially ops/halfops/voices) in channels, etc.
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###
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class ChannelState(object):
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__slots__ = ('users', 'ops', 'halfops', 'voices', 'topic')
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def __init__(self):
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self.topic = ''
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self.users = ircutils.IrcSet()
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self.ops = ircutils.IrcSet()
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self.halfops = ircutils.IrcSet()
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self.voices = ircutils.IrcSet()
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def addUser(self, user):
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"Adds a given user to the ChannelState. Power prefixes are handled."
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nick = user.lstrip('@%+')
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if not nick:
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return
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while user and user[0] in '@%+':
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(marker, user) = (user[0], user[1:])
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if marker == '@':
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self.ops.add(nick)
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elif marker == '%':
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self.halfops.add(nick)
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elif marker == '+':
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self.voices.add(nick)
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self.users.add(nick)
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def replaceUser(self, oldNick, newNick):
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"""Changes the user oldNick to newNick; used for NICK changes."""
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# Note that this doesn't have to have the sigil (@%+) that users
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# have to have for addUser; it just changes the name of the user
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# without changing any of his categories.
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for s in (self.users, self.ops, self.halfops, self.voices):
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if oldNick in s:
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s.remove(oldNick)
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s.add(newNick)
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def removeUser(self, user):
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"""Removes a given user from the channel."""
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self.users.discard(user)
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self.ops.discard(user)
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self.halfops.discard(user)
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self.voices.discard(user)
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def __getstate__(self):
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return [getattr(self, name) for name in self.__slots__]
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def __setstate__(self, t):
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for (name, value) in zip(self.__slots__, t):
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setattr(self, name, value)
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def __eq__(self, other):
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ret = True
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for name in self.__slots__:
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ret = ret and getattr(self, name) == getattr(other, name)
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return ret
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def __ne__(self, other):
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# This shouldn't even be necessary, grr...
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return not self == other
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class IrcState(IrcCommandDispatcher):
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"""Maintains state of the Irc connection. Should also become smarter.
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"""
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__slots__ = ('history', 'nicksToHostmasks', 'channels')
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def __init__(self):
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self.history = RingBuffer(conf.supybot.maxHistoryLength())
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self.reset()
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def reset(self):
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"""Resets the state to normal, unconnected state."""
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self.history.reset()
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self.channels = ircutils.IrcDict()
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self.nicksToHostmasks = ircutils.IrcDict()
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def __getstate__(self):
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return map(curry(getattr, self), self.__slots__)
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def __setstate__(self, t):
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for (name, value) in zip(self.__slots__, t):
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setattr(self, name, value)
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def __eq__(self, other):
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ret = True
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for name in self.__slots__:
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ret = ret and getattr(self, name) == getattr(other, name)
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return ret
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def __ne__(self, other):
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return not self == other
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def copy(self):
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ret = self.__class__()
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ret.history = copy.deepcopy(self.history)
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ret.nicksToHostmasks = copy.deepcopy(self.nicksToHostmasks)
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ret.channels = copy.deepcopy(self.channels)
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return ret
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def addMsg(self, irc, msg):
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"""Updates the state based on the irc object and the message."""
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self.history.append(msg)
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if ircutils.isUserHostmask(msg.prefix) and not msg.command == 'NICK':
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self.nicksToHostmasks[msg.nick] = msg.prefix
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method = self.dispatchCommand(msg.command)
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if method is not None:
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method(irc, msg)
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def getTopic(self, channel):
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"""Returns the topic for a given channel."""
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return self.channels[channel].topic
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def nickToHostmask(self, nick):
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"""Returns the hostmask for a given nick."""
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return self.nicksToHostmasks[nick]
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def do352(self, irc, msg):
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(nick, user, host) = (msg.args[2], msg.args[5], msg.args[3])
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hostmask = '%s!%s@%s' % (nick, user, host)
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self.nicksToHostmasks[nick] = hostmask
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def doJoin(self, irc, msg):
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for channel in msg.args[0].split(','):
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if channel in self.channels:
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self.channels[channel].addUser(msg.nick)
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else:
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chan = ChannelState()
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chan.addUser(msg.nick)
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self.channels[channel] = chan
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def doMode(self, irc, msg):
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channel = msg.args[0]
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if ircutils.isChannel(channel):
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chan = self.channels[channel]
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for (mode, nick) in ircutils.separateModes(msg.args[1:]):
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if mode == '-o':
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chan.ops.discard(nick)
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elif mode == '+o':
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chan.ops.add(nick)
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if mode == '-h':
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chan.halfops.discard(nick)
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elif mode == '+h':
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chan.halfops.add(nick)
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if mode == '-v':
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chan.voices.discard(nick)
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elif mode == '+v':
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chan.voices.add(nick)
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def do353(self, irc, msg):
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(_, _, channel, users) = msg.args
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chan = self.channels[channel]
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users = users.split()
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for user in users:
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chan.addUser(user)
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def doPart(self, irc, msg):
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for channel in msg.args[0].split(','):
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chan = self.channels[channel]
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if msg.nick == irc.nick:
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del self.channels[channel]
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else:
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chan.removeUser(msg.nick)
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def doKick(self, irc, msg):
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(channel, users) = msg.args[:2]
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chan = self.channels[channel]
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for user in users.split(','):
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chan.removeUser(user)
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def doQuit(self, irc, msg):
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for channel in self.channels.itervalues():
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channel.removeUser(msg.nick)
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def doTopic(self, irc, msg):
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if len(msg.args) == 1:
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return # Empty TOPIC for information. Does not affect state.
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chan = self.channels[msg.args[0]]
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chan.topic = msg.args[1]
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def do332(self, irc, msg):
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chan = self.channels[msg.args[1]]
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chan.topic = msg.args[2]
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def doNick(self, irc, msg):
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newNick = msg.args[0]
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oldNick = msg.nick
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try:
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if msg.user and msg.host:
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# Nick messages being handed out from the bot itself won't
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# have the necessary prefix to make a hostmask.
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newHostmask = ircutils.joinHostmask(newNick,msg.user,msg.host)
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self.nicksToHostmasks[newNick] = newHostmask
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del self.nicksToHostmasks[oldNick]
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except KeyError:
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pass
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for channel in self.channels.itervalues():
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channel.replaceUser(oldNick, newNick)
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###
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# The basic class for handling a connection to an IRC server. Accepts
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# callbacks of the IrcCallback interface. Public attributes include 'driver',
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# 'queue', and 'state', in addition to the standard nick/user/ident attributes.
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###
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class Irc(IrcCommandDispatcher):
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"""The base class for an IRC connection.
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Handles PING commands already.
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"""
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_nickSetters = sets.Set(['001', '002', '003', '004', '250', '251', '252',
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'254', '255', '265', '266', '372', '375', '376',
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'333', '353', '332', '366', '005'])
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def __init__(self, nick, user='', ident='', password='', callbacks=None):
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world.ircs.append(self)
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self.originalNick = intern(nick)
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self.nick = self.originalNick
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self.nickmods = cycle(conf.supybot.nickmods())
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self.password = password
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self.user = intern(user or nick) # Default to nick
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self.ident = intern(ident or nick) # Ditto.
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self.prefix = '%s!%s@%s' % (nick, ident, 'unset.domain')
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if callbacks is None:
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self.callbacks = []
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else:
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self.callbacks = callbacks
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self.state = IrcState()
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self.queue = IrcMsgQueue()
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self.lastTake = 0
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self.server = 'unset'
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self.afterConnect = False
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self.fastqueue = smallqueue()
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self.lastping = time.time()
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self.outstandingPing = False
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self.driver = None # The driver should set this later.
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if self.password:
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self.queue.enqueue(ircmsgs.password(self.password))
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self.queue.enqueue(ircmsgs.nick(self.nick))
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self.queue.enqueue(ircmsgs.user(self.ident, self.user))
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def reset(self):
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"""Resets the Irc object. Called when the driver reconnects."""
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self.nick = self.originalNick
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self.prefix = '%s!%s@%s' % (self.nick, self.ident, 'unset.domain')
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self.state.reset()
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self.queue.reset()
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self.server = 'unset'
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self.afterConnect = False
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self.lastping = time.time()
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self.outstandingPing = False
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self.fastqueue = queue()
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if self.password:
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self.queue.enqueue(ircmsgs.password(self.password))
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self.queue.enqueue(ircmsgs.nick(self.nick))
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self.queue.enqueue(ircmsgs.user(self.ident, self.user))
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for callback in self.callbacks:
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callback.reset()
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def addCallback(self, callback):
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"""Adds a callback to the callbacks list."""
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self.callbacks.append(callback)
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utils.sortBy(lambda cb: cb.priority, self.callbacks)
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def getCallback(self, name):
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"""Gets a given callback by name."""
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name = name.lower()
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for callback in self.callbacks:
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if callback.name().lower() == name:
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return callback
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else:
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return None
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def removeCallback(self, name):
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"""Removes a callback from the callback list."""
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name = name.lower()
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def nameMatches(cb):
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return cb.name().lower() == name
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(bad, good) = partition(nameMatches, self.callbacks)
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self.callbacks[:] = good
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return bad
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def queueMsg(self, msg):
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"""Queues a message to be sent to the server."""
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self.queue.enqueue(msg)
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def sendMsg(self, msg):
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"""Queues a message to be sent to the server *immediately*"""
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self.fastqueue.enqueue(msg)
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def takeMsg(self):
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"""Called by the IrcDriver; takes a message to be sent."""
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now = time.time()
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msg = None
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if self.fastqueue:
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msg = self.fastqueue.dequeue()
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elif self.queue:
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if not world.testing and now - self.lastTake <= \
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conf.supybot.throttleTime():
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log.debug('Irc.takeMsg throttling.')
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else:
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self.lastTake = now
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msg = self.queue.dequeue()
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elif conf.supybot.pingServer() and \
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now > (self.lastping + conf.supybot.pingInterval()) and \
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self.afterConnect:
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if self.outstandingPing:
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s = 'Reconnecting to %s, ping not replied to.' % self.server
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log.warning(s)
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self.driver.reconnect()
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self.reset()
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else:
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self.lastping = now
|
|
now = str(int(now))
|
|
self.outstandingPing = True
|
|
self.queueMsg(ircmsgs.ping(now))
|
|
if msg:
|
|
for callback in reviter(self.callbacks):
|
|
log.debug(repr(msg))
|
|
try:
|
|
outFilter = getattr(callback, 'outFilter')
|
|
except AttributeError, e:
|
|
continue
|
|
try:
|
|
msg = outFilter(self, msg)
|
|
except:
|
|
log.exception('Exception caught in outFilter:')
|
|
continue
|
|
if msg is None:
|
|
log.debug('%s.outFilter returned None' % callback.name())
|
|
return self.takeMsg()
|
|
if len(str(msg)) > 512:
|
|
# Yes, this violates the contract, but at this point it doesn't
|
|
# matter. That's why we gotta go munging in private attributes
|
|
msg._str = msg._str[:500] + '\r\n'
|
|
msg._len = len(str(msg))
|
|
try:
|
|
self.state.addMsg(self, msg)
|
|
except Exception, e:
|
|
log.exception('Uncaught exception in IrcState.addMsg. This '
|
|
'could be a bug, but it could also be the '
|
|
'result of an invalid message being sent via '
|
|
'Owner.ircquote.')
|
|
return
|
|
log.debug('Outgoing message: ' + str(msg).rstrip('\r\n'))
|
|
return msg
|
|
else:
|
|
return None
|
|
|
|
def do001(self, msg):
|
|
"""Does some logging."""
|
|
log.info('Received 001 from the server.')
|
|
|
|
def do002(self, msg):
|
|
"""Logs the ircd version."""
|
|
(beginning, version) = rsplit(msg.args[-1], maxsplit=1)
|
|
log.info('Server %s has version %s', self.server, version)
|
|
|
|
def doPing(self, msg):
|
|
"""Handles PING messages."""
|
|
self.sendMsg(ircmsgs.pong(msg.args[0]))
|
|
|
|
def doPong(self, msg):
|
|
"""Handles PONG messages."""
|
|
self.outstandingPing = False
|
|
|
|
def do376(self, msg):
|
|
self.afterConnect = True
|
|
do377 = do422 = do376
|
|
|
|
def do433(self, msg):
|
|
"""Handles 'nickname already in use' messages."""
|
|
self.sendMsg(ircmsgs.nick(self.nickmods.next() % self.originalNick))
|
|
do432 = do433
|
|
|
|
def doError(self, msg):
|
|
"""Handles ERROR messages."""
|
|
if msg.args[0].startswith('Closing Link'):
|
|
self.driver.reconnect()
|
|
elif 'too fast' in msg.args[0]:
|
|
self.driver.reconnect(wait=True)
|
|
|
|
def doNick(self, msg):
|
|
"""Handles NICK messages."""
|
|
if msg.nick == self.nick:
|
|
newNick = intern(msg.args[0])
|
|
self.nick = newNick
|
|
(nick, user, domain) = ircutils.splitHostmask(msg.prefix)
|
|
self.prefix = ircutils.joinHostmask(self.nick, user, domain)
|
|
self.prefix = intern(self.prefix)
|
|
elif conf.supybot.followIdentificationThroughNickChanges():
|
|
# We use elif here because this means it's someone else's nick
|
|
# change, not our own.
|
|
try:
|
|
id = ircdb.users.getUserId(msg.prefix)
|
|
u = ircdb.users.getUser(id)
|
|
except KeyError:
|
|
return
|
|
if u.auth:
|
|
(_, user, host) = ircutils.splitHostmask(msg.prefix)
|
|
newhostmask = ircutils.joinHostmask(msg.args[0], user, host)
|
|
log.info('Following identification for %s: %s -> %s',
|
|
u.name, u.auth[1], newhostmask)
|
|
u.auth = (u.auth[0], newhostmask)
|
|
ircdb.users.setUser(id, u)
|
|
|
|
def feedMsg(self, msg):
|
|
"""Called by the IrcDriver; feeds a message received."""
|
|
log.debug('Incoming message: ' + str(msg).rstrip('\r\n'))
|
|
|
|
# Yeah, so this is odd. Some networks (oftc) seem to give us certain
|
|
# messages with our nick instead of our prefix. We'll fix that here.
|
|
if msg.prefix == self.nick:
|
|
log.debug('Got one of those odd nick-instead-of-prefix msgs.')
|
|
msg = ircmsgs.IrcMsg(prefix=self.prefix, msg=msg)
|
|
|
|
# This catches cases where we know our own nick (from sending it to the
|
|
# server) but we don't yet know our prefix.
|
|
if msg.nick == self.nick and self.prefix != msg.prefix:
|
|
self.prefix = msg.prefix
|
|
|
|
# This keeps our nick and server attributes updated.
|
|
if msg.command in self._nickSetters:
|
|
if msg.args[0] != self.nick:
|
|
log.info('Updating nick attribute.')
|
|
self.nick = msg.args[0]
|
|
if msg.prefix != self.server:
|
|
log.info('Updating server attribute.')
|
|
self.server = msg.prefix
|
|
|
|
# Dispatch to specific handlers for commands.
|
|
method = self.dispatchCommand(msg.command)
|
|
if method is not None:
|
|
method(msg)
|
|
|
|
# Now update the IrcState object.
|
|
try:
|
|
self.state.addMsg(self, msg)
|
|
except:
|
|
log.exception('Exception in update of IrcState object:')
|
|
|
|
# Now call the callbacks.
|
|
for callback in self.callbacks:
|
|
try:
|
|
m = callback.inFilter(self, msg)
|
|
if not m:
|
|
log.debug('%s.inFilter returned None' % callback.name())
|
|
return
|
|
msg = m
|
|
except:
|
|
log.exception('Uncaught exception in inFilter:')
|
|
for callback in self.callbacks:
|
|
try:
|
|
if callback is not None:
|
|
callback(self, msg)
|
|
except:
|
|
log.exception('Uncaught exception in callback:')
|
|
|
|
def die(self):
|
|
"""Makes the Irc object die. Dead."""
|
|
log.info('Irc object for %s dying.' % self.server)
|
|
for callback in self.callbacks:
|
|
callback.die()
|
|
if self in world.ircs:
|
|
world.ircs.remove(self)
|
|
|
|
def __hash__(self):
|
|
return id(self)
|
|
|
|
def __eq__(self, other):
|
|
return id(self) == id(other)
|
|
|
|
def __str__(self):
|
|
return 'Irc object for server %s' % self.server
|
|
|
|
|
|
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78:
|