Limnoria/src/asyncoreDrivers.py

#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

from fix import *

import re
import sys
import time
import socket
import asyncore
import asynchat

import repl
import conf
import debug
import ircdb
import world
import drivers
import ircmsgs
import schedule

class AsyncoreRunnerDriver(drivers.IrcDriver):
    def run(self):
        #debug.printf(asyncore.socket_map)
        try:
            asyncore.poll(conf.poll)
        except:
            debug.recoverableException()


class AsyncoreDriver(asynchat.async_chat, object):
    def __init__(self, (server, port), irc):
        #debug.methodNamePrintf(self, '__init__')
        asynchat.async_chat.__init__(self)
        self.server = (server, port)
        self.irc = irc
        self.irc.driver = self
        self.buffer = ''
        self.set_terminator('\n')
        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
        try:
            self.connect(self.server)
        except:
            debug.recoverableException('terse')
            self.close()

    def scheduleReconnect(self):
        #debug.methodNamePrintf(self, 'scheduleReconnect')
        when = time.time() + 60
        whenS = time.strftime(conf.logTimestampFormat, time.localtime(when))
        debug.msg('Scheduling reconnect to %s at %s' % (self.server, whenS),
                  'normal')
        def makeNewDriver():
            self.irc.reset()
            driver = self.__class__(self.server, self.irc)
        schedule.addEvent(makeNewDriver, when)

    def writable(self):
        #debug.methodNamePrintf(self, 'writable')
        while self.connected:
            m = self.irc.takeMsg()
            if m:
                self.push(str(m))
            else:
                break
        return asynchat.async_chat.writable(self)

    def handle_error(self):
        #debug.recoverableException()
        self.handle_close()

    def collect_incoming_data(self, s):
        #debug.methodNamePrintf(self, 'collect_incoming_data')
        self.buffer += s

    def found_terminator(self):
        #debug.methodNamePrintf(self, 'found_terminator')
        start = time.time()
        msg = ircmsgs.IrcMsg(self.buffer)
        debug.msg('Time to parse IrcMsg: %s' % (time.time()-start), 'verbose')
        self.buffer = ''
        try:
            self.irc.feedMsg(msg)
        except:
            debug.msg('Exception caught outside Irc object.', 'normal')
            debug.recoverableException()

    def handle_close(self):
        #debug.methodNamePrintf(self, 'handle_close')
        self.scheduleReconnect()
        self.die()

    reconnect = handle_close

    def handle_connect(self):
        #debug.methodNamePrintf(self, 'handle_connect')
        pass

    def die(self):
        #debug.methodNamePrintf(self, 'die')
        self.close()


class ReplListener(asyncore.dispatcher, object):
    def __init__(self, port=conf.telnetPort):
        asyncore.dispatcher.__init__(self)
        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
        self.set_reuse_addr()
        self.bind(('', port))
        self.listen(5)

    def handle_accept(self):
        (sock, addr) = self.accept()
        debug.msg('Connection made to telnet-REPL: ' + str(addr),'normal')
        Repl((sock, addr))


class Repl(asynchat.async_chat, object):
    filename = 'repl'
    def __init__(self, (sock, addr)):
        asynchat.async_chat.__init__(self, sock)
        self.buffer = ''
        self.prompt = """SupyBot version %s.
Python %s
Type disconnect() to disconnect.
Name: """ % (world.version, sys.version.translate(string.ascii, '\r\n'))
        self.u = None
        self.authed = False
        self.set_terminator('\r\n')
        self.repl = repl.Repl(addr[0])
        self.repl.namespace['disconnect'] = self.close
        self.push(self.prompt)
        self.tries = 0

    _re = re.compile(r'(?<!\r)\n')
    def push(self, data):
        asynchat.async_chat.push(self, self._re.sub('\r\n', data))

    def collect_incoming_data(self, data):
        if self.tries >= 3:
            self.close()
        self.buffer += data
        if len(self.buffer) > 1024:
            self.close()

    def handle_close(self):
        self.close()

    def handle_error(self):
        self.close()

    def found_terminator(self):
        if self.u is None:
            try:
                name = self.buffer
                self.buffer = ''
                id = ircdb.users.getUserId(name)
                self.u = ircdb.users.getUser(id)
                self.prompt = 'Password: '
            except KeyError:
                self.push('Unknown user.\n')
                self.tries += 1
                self.prompt = 'Name: '
                msg = 'Unknown user %s on telnet REPL.' % name
                debug.msg(msg,'high')
            self.push(self.prompt)
        elif self.u is not None and not self.authed:
            password = self.buffer
            self.buffer = ''
            if self.u.checkPassword(password):
                if self.u.checkCapability('owner'):
                    self.authed = True
                    self.prompt = '>>> '
                else:
                    self.push('Only owners can use this feature.\n')
                    self.close()
                    msg = 'Attempted non-owner user %s on telnet REPL' % name
                    debug.msg(msg, 'high')
            else:
                self.push('Incorrect Password.\n')
                self.prompt = 'Name: '
                self.u = None
                msg = 'Invalid password for user %s on telnet REPL.' % name
                debug.msg(msg, 'high')
            self.push(self.prompt)
        elif self.authed:
            debug.msg('Telnet REPL: %s' % self.buffer)
            ret = self.repl.addLine(self.buffer+'\r\n')
            self.buffer = ''
            if ret is not repl.NotYet:
                if ret is not None:
                    s = self._re.sub('\r\n', str(ret))
                    self.push(s)
                    self.push('\r\n')
                self.prompt = '>>> '
            else:
                self.prompt = '... '
            self.push(self.prompt)

try:
    ignore(poller)
except NameError:
    poller = AsyncoreRunnerDriver()

if conf.telnetEnable and __name__ != '__main__':
    try:
        ignore(_listener)
    except NameError:
        _listener = ReplListener()

Driver = AsyncoreDriver

if __name__ == '__main__':
    ReplListener()
    asyncore.loop()
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