bot.py

   1 #!/usr/bin/python
   2 # vim: fileencoding=utf-8
   3
   4 # Erebus IRC bot - Author: John Runyon
   5 # "Bot" and "BotConnection" classes (handling a specific "arm")
   6
   7 import os, random, socket, struct, sys, threading, time, traceback
   8 from collections import deque
   9
  10 if sys.version_info.major < 3:
  11         timerbase = threading._Timer
  12         stringbase = basestring
  13 else:
  14         timerbase = threading.Timer
  15         stringbase = str
  16
  17 class MyTimer(timerbase):
  18         def __init__(self, *args, **kwargs):
  19                 timerbase.__init__(self, *args, **kwargs)
  20                 self.daemon = True
  21
  22 if sys.version_info.major < 3:
  23         stringbase = basestring
  24 else:
  25         stringbase = str
  26
  27 #bots = {'erebus': bot.Bot(nick='Erebus', user='erebus', bind='', server='irc.quakenet.org', port=6667, realname='Erebus')}
  28 class Bot(object):
  29         def __init__(self, parent, nick, user, bind, authname, authpass, server, port, realname):
  30                 self.maxlen = 510
  31
  32                 self.parent = parent
  33                 self.nick = nick
  34                 self.permnick = nick
  35                 self.user = user
  36                 self.realname = realname
  37
  38                 self.authname = authname
  39                 self.authpass = authpass
  40
  41                 self.connecttime = 0 # time at which we received numeric 001
  42                 self.server = server # the address we try to (re-)connect to
  43                 self.port = port
  44                 self.servername = server # the name of the server we got connected to
  45
  46                 curs = self.parent.query("SELECT chname FROM chans WHERE bot = %s AND active = 1", (self.permnick,))
  47                 if curs:
  48                         chansres = curs.fetchall()
  49                         curs.close()
  50                         self.chans = [self.parent.newchannel(self, row['chname']) for row in chansres]
  51                 else:
  52                         self.chans = []
  53
  54                 self.conn = BotConnection(self, bind, server, port)
  55
  56                 self.lastreceived = time.time() #time we last received a line from the server
  57                 self.watchdog()
  58
  59                 self.msgqueue = deque()
  60                 self.slowmsgqueue = deque()
  61                 self._makemsgtimer()
  62                 self._msgtimer.start()
  63                 self.joined_chans = False
  64
  65         def __del__(self):
  66                 try:
  67                         curs = self.parent.query("UPDATE bots SET connected = 0 WHERE nick = %s", (self.permnick,))
  68                         curs.close()
  69                 except: pass
  70
  71         def watchdog(self):
  72                 if time.time() > int(self.parent.cfg.get('watchdog', 'maxtime', default=300))+self.lastreceived:
  73                         self.parse("ERROR :Fake-error from watchdog timer.")
  74                 if self.conn.registered():
  75                         self.conn.send("PING :%s" % (time.time()))
  76                         self._checknick()
  77                 watchdogtimer = MyTimer(int(self.parent.cfg.get('watchdog', 'interval', default=30)), self.watchdog)
  78                 watchdogtimer.start()
  79
  80         def log(self, *args, **kwargs):
  81                 self.parent.log(self.nick, *args, **kwargs)
  82
  83         def connect(self):
  84                 self.log('!', "Connecting")
  85                 if self.conn.connect():
  86                         self.log('!', "Connected")
  87                         self.parent.newfd(self, self.conn.socket.fileno())
  88
  89         def getdata(self):
  90                 try:
  91                         recvd = self.conn.read()
  92                         self.lastreceived = time.time()
  93                         return recvd
  94                 except EOFError as e:
  95                         return [":%s ERROR :%s%r" % (self.nick, e.__class__.__name__, e.args)]
  96
  97         def _checknick(self): # check if we're using the right nick, try changing
  98                 if self.nick != self.permnick and self.conn.registered():
  99                         self.conn.send("NICK %s" % (self.permnick))
 100
 101         def parse(self, line):
 102                 pieces = line.split()
 103
 104                 if pieces[0][0] == ":":
 105                         numeric = pieces[1]
 106                 else:
 107                         numeric = pieces[0]
 108
 109                 # dispatch dict
 110                 dispatch = {
 111                         'NOTICE': self._gotconnected,
 112                         '001': self._got001,
 113                         '004': self._got004,
 114                         '376': self._gotRegistered,
 115                         '422': self._gotRegistered,
 116                         'PRIVMSG': self._gotprivmsg,
 117                         '353': self._got353, #NAMES
 118                         '354': self._got354, #WHO
 119                         '396': self._gotHiddenHost, # hidden host has been set
 120                         '433': self._got433, #nick in use
 121                         'JOIN': self._gotjoin,
 122                         'PART': self._gotpart,
 123                         'KICK': self._gotkick,
 124                         'QUIT': self._gotquit,
 125                         'NICK': self._gotnick,
 126                         'MODE': self._gotmode,
 127                         'PING': self._gotping,
 128                         'ERROR': self._goterror,
 129                 }
 130
 131                 if self.parent.hasnumhook(numeric):
 132                         hooks = self.parent.getnumhook(numeric)
 133                         for callback in hooks:
 134                                 try:
 135                                         callback(self, line)
 136                                 except Exception:
 137                                         self._cbexception("numhook", line)
 138
 139                 if numeric in dispatch:
 140                         dispatch[numeric](pieces)
 141
 142         def _gotconnected(self, pieces):
 143                 if not self.conn.registered():
 144                         self.conn.register()
 145         def _gotping(self, pieces):
 146                 self.conn.send("PONG %s" % (pieces[1]))
 147                 self._checknick()
 148         def _goterror(self, pieces):
 149                 # TODO: better handling, just reconnect that single bot
 150                 error = ' '.join(pieces)
 151                 try:
 152                         raise Exception(error)
 153                 except Exception as e:
 154                         self.parent.mustquit = e
 155                 try:
 156                         self.quit("Error detected: %s" % (error))
 157                 except: pass
 158                 try:
 159                         curs = self.parent.query("UPDATE bots SET connected = 0")
 160                         curs.close()
 161                 except: pass
 162                 self.log('!', 'Bot exiting due to: %s' % (error))
 163         def _got001(self, pieces):
 164                 # We wait until the end of MOTD instead to consider ourselves registered, but consider uptime as of 001
 165                 self.connecttime = time.time()
 166         def _got004(self, pieces):
 167                 self.servername = pieces[3]
 168         def _gotRegistered(self, pieces):
 169                 self.conn.registered(True)
 170
 171                 curs = self.parent.query("UPDATE bots SET connected = 1 WHERE nick = %s", (self.permnick,))
 172                 if curs: curs.close()
 173
 174                 self.conn.send("MODE %s +x" % (pieces[2]))
 175                 if self.authname is not None and self.authpass is not None:
 176                         self.conn.send(self.parent.cfg.get('erebus', 'auth_command', "AUTH %s %s") % (self.authname, self.authpass))
 177                 if not self.parent.cfg.getboolean('erebus', 'wait_for_hidden_host'):
 178                         for c in self.chans:
 179                                 self.join(c.name)
 180                         self.joined_chans = True
 181         def _gotHiddenHost(self, pieces):
 182                 if not self.joined_chans and self.parent.cfg.getboolean('erebus', 'wait_for_hidden_host'):
 183                         for c in self.chans:
 184                                 self.join(c.name)
 185                         self.joined_chans = True
 186         def _gotprivmsg(self, pieces):
 187                 nick = pieces[0].split('!')[0][1:]
 188                 user = self.parent.user(nick)
 189                 target = pieces[2]
 190                 msg = ' '.join(pieces[3:])[1:]
 191                 self.parsemsg(user, target, msg)
 192         def _got353(self, pieces):
 193                 prefixes = {'@': 'op', '+': 'voice'}
 194                 chan = self.parent.channel(pieces[4])
 195                 names = pieces[5:]
 196                 names[0] = names[0][1:] #remove colon
 197                 for n in names:
 198                         if n[0] in prefixes:
 199                                 user = self.parent.user(n[1:])
 200                                 chan.userjoin(user, prefixes[n[0]])
 201                         else:
 202                                 user = self.parent.user(n)
 203                                 chan.userjoin(user)
 204                         user.join(chan)
 205         def _got354(self, pieces):
 206                 qt = int(pieces[3])
 207                 if qt < 3:
 208                         nick, auth = pieces[4:6]
 209                         chan = None
 210                 else:
 211                         chan, nick, auth = pieces[4:7]
 212                         chan = self.parent.channel(chan)
 213                 user = self.parent.user(nick)
 214                 user.authed(auth)
 215
 216                 if chan is not None:
 217                         user.join(chan)
 218                         chan.userjoin(user)
 219
 220                 if qt == 2: # triggered by !auth
 221                         if user.isauthed():
 222                                 if user.glevel > 0:
 223                                         self.msg(nick, "You are now known as #%s (access level: %s)" % (auth, user.glevel))
 224                                 else:
 225                                         self.msg(nick, "You are now known as #%s (not staff)" % (auth))
 226                         else:
 227                                 self.msg(nick, "I tried, but you're not authed!")
 228         def _got433(self, pieces):
 229                 if not self.conn.registered(): #we're trying to connect
 230                         newnick = "%s%d" % (self.nick, random.randint(111, 999))
 231                         self.conn.send("NICK %s" % (newnick))
 232                         self.nick = newnick
 233         def _gotjoin(self, pieces):
 234                 nick = pieces[0].split('!')[0][1:]
 235                 chan = self.parent.channel(pieces[2])
 236
 237                 if nick == self.nick:
 238                         self.conn.send("WHO %s c%%cant,3" % (chan))
 239                 else:
 240                         user = self.parent.user(nick, send_who=True)
 241                         chan.userjoin(user)
 242                         user.join(chan)
 243         def _clientLeft(self, nick, chan):
 244                 if nick == self.nick:
 245                         for u in chan.users:
 246                                 if u.nick != self.nick:
 247                                         self._clientLeft(u.nick, chan)
 248                 else:
 249                         user = self.parent.user(nick)
 250                         gone = user.part(chan)
 251                         chan.userpart(user)
 252                         if gone:
 253                                 user.quit()
 254                                 del self.parent.users[nick.lower()]
 255         def _gotpart(self, pieces):
 256                 nick = pieces[0].split('!')[0][1:]
 257                 chan = self.parent.channel(pieces[2])
 258                 self._clientLeft(nick, chan)
 259         def _gotkick(self, pieces):
 260                 nick = pieces[3]
 261                 chan = self.parent.channel(pieces[2])
 262                 self._clientLeft(nick, chan)
 263         def _gotquit(self, pieces):
 264                 nick = pieces[0].split('!')[0][1:]
 265                 if nick != self.nick:
 266                         for chan in self.parent.user(nick).chans:
 267                                 chan.userpart(self.parent.user(nick))
 268                         self.parent.user(nick).quit()
 269                         del self.parent.users[nick.lower()]
 270         def _gotnick(self, pieces):
 271                 oldnick = pieces[0].split('!')[0][1:]
 272                 newnick = pieces[2][1:]
 273                 if oldnick == self.nick:
 274                         self.nick = newnick
 275                 else:
 276                         if newnick.lower() != oldnick.lower():
 277                                 self.parent.users[newnick.lower()] = self.parent.users[oldnick.lower()]
 278                                 del self.parent.users[oldnick.lower()]
 279                         self.parent.users[newnick.lower()].nickchange(newnick)
 280         def _gotmode(self, pieces):
 281                 source = pieces[0].split('!')[0][1:]
 282                 chan = pieces[2]
 283                 if not chan.startswith("#"): return
 284                 chan = self.parent.channel(pieces[2])
 285                 mode = pieces[3]
 286                 args = pieces[4:]
 287
 288                 adding = True
 289                 for c in mode:
 290                         if c == '+':
 291                                 adding = True
 292                         elif c == '-':
 293                                 adding = False
 294                         elif c == 'o':
 295                                 if adding:
 296                                         chan.userop(self.parent.user(args.pop(0)))
 297                                 else:
 298                                         chan.userdeop(self.parent.user(args.pop(0)))
 299                         elif c == 'v':
 300                                 if adding:
 301                                         chan.uservoice(self.parent.user(args.pop(0)))
 302                                 else:
 303                                         chan.userdevoice(self.parent.user(args.pop(0)))
 304                         else:
 305                                 pass # don't care about other modes
 306
 307         def _cbexception(self, source, *args, chained=False, **kwargs):
 308                 if not chained: # skip hooks if we were caused by a hook
 309                         exc = sys.exception()
 310                         if self.parent.hasexceptionhook(exc):
 311                                 for callback in self.parent.getexceptionhook(exc):
 312                                         try:
 313                                                 callback(self, exc, source, *args, **kwargs)
 314                                         except Exception:
 315                                                 self._cbexception('exceptionhook', chained=True, module=callback.__module__, function=callback.__name__, underlying=(source, args, kwargs))
 316                 if self.parent.cfg.getboolean('debug', 'cbexc'):
 317                         self.conn.send("PRIVMSG %s :%09.3f \ 34\1f!!! CBEXC\1f\ 3 %s" % (self.parent.cfg.get('debug', 'owner'), time.time() % 100000, source))
 318                         traceback.print_exc(chain=not chained)
 319                         self.log('!', "CBEXC %s %r %r" % (source, args, kwargs))
 320
 321
 322         def parsemsg(self, user, target, msg):
 323                 if user.glevel <= -2: return # short circuit if user is IGNORED
 324                 chan = None
 325                 chanparam = None # was the channel specified as part of the command?
 326                 if len(msg) == 0:
 327                         return
 328
 329                 if target == self.nick and msg.startswith("\001"): #ctcp
 330                         msg = msg.strip("\001")
 331                         if msg:
 332                                 pieces = msg.split()
 333                                 if pieces[0] == "CLIENTINFO":
 334                                         self.msg(user, "\001CLIENTINFO VERSION PING\001")
 335                                 elif pieces[0] == "VERSION":
 336                                         self.msg(user, "\001VERSION Erebus v%d.%d - http://jfr.im/git/erebus.git\001" % (self.parent.APIVERSION, self.parent.RELEASE))
 337                                 elif pieces[0] == "PING":
 338                                         if len(pieces) > 1:
 339                                                 self.msg(user, "\001PING %s\001" % (' '.join(pieces[1:])))
 340                                         else:
 341                                                 self.msg(user, "\001PING\001")
 342                         return
 343
 344                 triggerused = msg.startswith(self.parent.trigger)
 345                 if triggerused: msg = msg[len(self.parent.trigger):]
 346                 pieces = msg.split()
 347
 348                 if len(pieces) == 0:
 349                         return
 350
 351                 if target != self.nick: # message was sent to a channel
 352                         try:
 353                                 if pieces[0][:-1].lower() == self.nick.lower() and (pieces[0][-1] == ":" or pieces[0][-1] == ","):
 354                                         pieces.pop(0) # command actually starts with next word
 355                                         if len(pieces) == 0: # is there still anything left?
 356                                                 return
 357                                         msg = ' '.join(pieces)
 358                                         triggerused = True
 359                         except IndexError:
 360                                 return # "message" is empty
 361
 362                 if len(pieces) > 1:
 363                         chanword = pieces[1]
 364                         if chanword.startswith('#'):
 365                                 chanparam = self.parent.channel(chanword)
 366
 367                 if target != self.nick: # message was sent to a channel
 368                         chan = self.parent.channel(target)
 369                         if not triggerused:
 370                                 if self.parent.haschanhook(target.lower()):
 371                                         for callback in self.parent.getchanhook(target.lower()):
 372                                                 try:
 373                                                         cbret = callback(self, user, chan, *pieces)
 374                                                         if isinstance(cbret, stringbase):
 375                                                                 self.reply(target, user, cbret)
 376                                                 except:
 377                                                         self.msg(user, "Command failed. Code: CBEXC%09.3f" % (time.time() % 100000))
 378                                                         self._cbexception("chanhook", user=user, target=target, msg=msg)
 379                                 return # not to bot, don't process!
 380
 381                 cmd = pieces[0].lower()
 382                 rancmd = False
 383                 if self.parent.hashook(cmd):
 384                         for callback in self.parent.gethook(cmd):
 385                                 if chanparam is not None and (callback.needchan or callback.wantchan):
 386                                         chan = chanparam
 387                                         pieces.pop(1)
 388                                 if chan is None and callback.needchan:
 389                                         rancmd = True
 390                                         self.msg(user, "You need to specify a channel for that command.")
 391                                 elif user.glevel >= callback.reqglevel and (not callback.needchan or chan.levelof(user.auth) >= callback.reqclevel):
 392                                         rancmd = True
 393                                         try:
 394                                                 cbret = callback(self, user, chan, target, *pieces[1:])
 395                                                 if isinstance(cbret, stringbase):
 396                                                         self.reply(target, user, cbret)
 397                                         except Exception:
 398                                                 self.msg(user, "Command failed. Code: CBEXC%09.3f" % (time.time() % 100000))
 399                                                 self._cbexception("hook", user=user, target=target, msg=msg)
 400                                         except SystemExit as e:
 401                                                 self.parent.mustquit = e
 402                                                 try:
 403                                                         curs = self.parent.query("UPDATE bots SET connected = 0")
 404                                                         curs.close()
 405                                                 except: pass
 406                                                 raise e
 407                 else:
 408                         rancmd = True
 409                         self.msg(user, "I don't know that command.")
 410                 if not rancmd:
 411                         self.msg(user, "You don't have enough access to run that command.")
 412
 413         def __debug_nomsg(self, target, msg):
 414                 if self.parent.cfg.getboolean('debug', 'nomsg'):
 415                         self.conn.send("PRIVMSG %s :%09.3f \ 34\1f!!! NOMSG\1f\ 3 %r, %r" % (self.parent.cfg.get('debug', 'owner'), time.time() % 100000, target, msg))
 416                         self.log('!', "!!! NOMSG")
 417 #                       print "%09.3f %s [!] %s" % (time.time() % 100000, self.nick, "!!! NOMSG")
 418                         traceback.print_stack()
 419
 420
 421         def reply(self, chan, user, msg):
 422                 if chan is not None and (isinstance(chan, self.parent.Channel) or (isinstance(chan, stringbase) and chan[0] == "#")):
 423                         self.msg(chan, "%s: %s" % (user, msg))
 424                 else:
 425                         self.msg(user, msg)
 426
 427         """
 428                 Does the work for msg/slowmsg/fastmsg. Uses the append_callback to append to the correct queue.
 429
 430                 In the case of fastmsg, self.conn.exceeded may be True, however, in this case append_callback=self.conn.send, so it will still be sent immediately.
 431         """
 432         def _msg(self, target, msg, truncate, append_callback, msgtype):
 433                 if self.parent.cfg.getboolean('erebus', 'nofakelag'): append_callback = self.conn.send
 434
 435                 cmd = self._formatmsg(target, msg, msgtype)
 436                 # The max length is much shorter than conn.maxlen (510) because of the length the server adds on about the source (us).
 437                 # If you know your hostmask, you can of course figure the exact length, but it's very difficult to reliably know your hostmask.
 438                 maxlen = self.maxmsglen()
 439                 if len(cmd) > maxlen:
 440                         if not truncate:
 441                                 return False
 442                         else:
 443                                 cmd = cmd[:maxlen]
 444
 445                 if self.conn.exceeded or self.conn.bytessent+len(cmd) >= self.conn.recvq:
 446                         append_callback(cmd)
 447                 else:
 448                         self.conn.send(cmd)
 449
 450                 self.conn.exceeded = True
 451                 return True
 452
 453         def msg(self, target, msg, truncate=False, *, msgtype=None):
 454                 """msgtype must be a valid IRC command, i.e. NOTICE or PRIVMSG; or leave as None to use default"""
 455                 return self._msg(target, msg, truncate, self.msgqueue.append, msgtype)
 456
 457         def slowmsg(self, target, msg, truncate=False, *, msgtype=None):
 458                 return self._msg(target, msg, truncate, self.slowmsgqueue.append, msgtype)
 459
 460         def fastmsg(self, target, msg, truncate=False, *, msgtype=None):
 461                 return self._msg(target, msg, truncate, self.conn.send, msgtype)
 462
 463         def _formatmsg(self, target, msg, msgtype):
 464                 if target is None or msg is None:
 465                         return self.__debug_nomsg(target, msg)
 466
 467                 target = str(target)
 468
 469                 if msgtype is not None: command = "%s %s :%s" % (msgtype, target, msg)
 470                 elif target.startswith('#'): command = "PRIVMSG %s :%s" % (target, msg)
 471                 else: command = "NOTICE %s :%s" % (target, msg)
 472
 473                 return command
 474
 475         def _popmsg(self):
 476                 self._makemsgtimer()
 477                 self.conn.bytessent -= self.conn.recvq/3
 478                 if self.conn.bytessent < 0: self.conn.bytessent = 0
 479                 self.conn.exceeded = True
 480
 481                 cmd = None
 482                 try:
 483                         cmd = self.msgqueue.popleft()
 484                 except IndexError:
 485                         try:
 486                                 cmd = self.slowmsgqueue.popleft()
 487                         except IndexError:
 488                                 pass
 489
 490                 if cmd is not None:
 491                         if self.conn.bytessent+len(cmd) > self.conn.recvq: # If it's too long
 492                                 if len(cmd) > self.conn.recvq: # Is the command itself somehow over max length???
 493                                         self._msgtimer.start()
 494                                         raise ValueError('Somehow a command that was too long made it into the message queue. Uhoh!', cmd)
 495                                         # Discard the message.
 496                                 self.msgqueue.appendleft(cmd) # Phew, we've just sent too much recently. Put it (back) on the (primary) queue.
 497                         else:
 498                                 self.conn.send(cmd)
 499
 500                 self._msgtimer.start()
 501
 502         def _makemsgtimer(self):
 503                 self._msgtimer = MyTimer(3, self._popmsg)
 504
 505         def join(self, chan):
 506                 self.conn.send("JOIN %s" % (chan))
 507
 508         def part(self, chan):
 509                 self.conn.send("PART %s" % (chan))
 510
 511         def quit(self, reason="Shutdown"):
 512                 self.conn.send("QUIT :%s" % (reason))
 513
 514         def maxmsglen(self):
 515                 return (
 516                         self.maxlen
 517                         - 63 # max hostname len
 518                         - 11 # max ident len
 519                         - 3  # the symbols in :nick!user@host
 520                         - len(self.nick)
 521                 )
 522
 523         def __str__(self): return self.nick
 524         def __repr__(self): return "<Bot %r>" % (self.nick)
 525
 526 class BotConnection(object):
 527         def __init__(self, parent, bind, server, port):
 528                 self.parent = parent
 529                 self.buffer = bytearray()
 530                 self.socket = None
 531
 532                 self.bind = bind
 533                 self.server = server
 534                 self.port = int(port)
 535
 536                 self.state = 0 # 0=disconnected, 1=registering, 2=connected
 537
 538                 self.bytessent = 0
 539                 self.recvq = 510 # How much we can send per period
 540                 self.exceeded = False
 541                 self._nowrite = False
 542
 543         def connect(self):
 544                 if self.parent.parent.cfg.getboolean('erebus', 'tls'):
 545                         import ssl
 546                         undersocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 547                         context = ssl.create_default_context()
 548                         self.socket = context.wrap_socket(undersocket, server_hostname=self.server)
 549                 else:
 550                         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 551                 self.socket.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1) # Does Python make SOL_TCP portable? Who knows, it's not documented, and it appears to come from the _socket C lib.
 552                 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, struct.pack('ii', 0, 0))
 553                 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
 554                 self.socket.bind((self.bind, 0))
 555                 self.socket.connect((self.server, self.port))
 556                 return True
 557         def register(self):
 558                 if self.state == 0:
 559                         self.send("NICK %s" % (self.parent.nick))
 560                         self.send("USER %s 0 * :%s" % (self.parent.user, self.parent.realname))
 561                         self.state = 1
 562                 return True
 563
 564         def registered(self, done=False):
 565                 if done: self.state = 2
 566                 return self.state == 2
 567
 568         def send(self, line):
 569                 if not self._nowrite:
 570                         if self.parent.parent.cfg.getboolean('debug', 'io'):
 571                                 self.parent.log('O', line)
 572                         self.bytessent += len(line)
 573                         try:
 574                                 self._write(line)
 575                         except socket.error as e:
 576                                 self._nowrite = True
 577                                 self.parent._goterror(repr(e))
 578                 else:
 579                         if self.parent.parent.cfg.getboolean('debug', 'io'):
 580                                 self.parent.log('X', line)
 581
 582         def _write(self, line):
 583                 self.socket.sendall(line.encode('utf-8', 'backslashreplace')+b"\r\n")
 584
 585         def _getsockerr(self):
 586                 try: # SO_ERROR might not exist on all platforms
 587                         return self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
 588                 except:
 589                         return None
 590
 591         def read(self):
 592                 recvd = self.socket.recv(8192)
 593                 if recvd == b"":
 594                         raise EOFError("socket.recv returned empty", self.parent.nick, self._getsockerr())
 595                 self.buffer += recvd
 596                 lines = []
 597
 598                 while b"\r\n" in self.buffer:
 599                         pieces = self.buffer.split(b"\r\n", 1)
 600                         lines.append(pieces[0].decode('utf-8', 'backslashreplace'))
 601                         self.buffer = pieces[1]
 602
 603                 return lines
 604
 605         def __str__(self): return self.parent.nick
 606         def __repr__(self): return "<BotConnection %r (%r)>" % (self.socket.fileno(), self.parent.nick)