3 irkerd - a simple IRC multiplexer daemon
5 Listens for JSON objects of the form {'to':<irc-url>, 'privmsg':<text>}
6 and relays messages to IRC channels. Each request must be followed by
9 The <text> must be a string. The value of the 'to' attribute can be a
10 string containing an IRC URL (e.g. 'irc://chat.freenet.net/botwar') or
11 a list of such strings; in the latter case the message is broadcast to
12 all listed channels. Note that the channel portion of the URL need
13 *not* have a leading '#' unless the channel name itself does.
15 Options: -d sets the debug-message level (probably only of interest to
16 developers). -l sets a logfile to capture message traffic from
17 channels. -n sets the nick and -p the nickserv password. The -V
18 option prints the program version and exits.
20 Design and code by Eric S. Raymond <esr@thyrsus.com>. See the project
21 resource page at <http://www.catb.org/~esr/irker/>.
23 Requires Python 2.6 or 2.5 with the simplejson library installed.
26 from __future__ import with_statement
28 # These things might need tuning
33 XMIT_TTL = (3 * 60 * 60) # Time to live, seconds from last transmit
34 PING_TTL = (15 * 60) # Time to live, seconds from last PING
35 HANDSHAKE_TTL = 60 # Time to live, seconds from nick transmit
36 CHANNEL_TTL = (3 * 60 * 60) # Time to live, seconds from last transmit
37 DISCONNECT_TTL = (24 * 60 * 60) # Time to live, seconds from last connect
38 UNSEEN_TTL = 60 # Time to live, seconds since first request
39 CHANNEL_MAX = 18 # Max channels open per socket (default)
40 ANTI_FLOOD_DELAY = 1.0 # Anti-flood delay after transmissions, seconds
41 ANTI_BUZZ_DELAY = 0.09 # Anti-buzz delay after queue-empty check
42 CONNECTION_MAX = 200 # To avoid hitting a thread limit
44 # No user-serviceable parts below this line
53 import simplejson as json # Faster, also makes us Python-2.4-compatible
67 LOG = logging.getLogger(__name__)
68 LOG.setLevel(logging.ERROR)
69 LOG_LEVELS = ['critical', 'error', 'warning', 'info', 'debug']
72 # Sketch of implementation:
74 # One Irker object manages multiple IRC sessions. It holds a map of
75 # Dispatcher objects, one per (server, port) combination, which are
76 # responsible for routing messages to one of any number of Connection
77 # objects that do the actual socket conversations. The reason for the
78 # Dispatcher layer is that IRC daemons limit the number of channels a
79 # client (that is, from the daemon's point of view, a socket) can be
80 # joined to, so each session to a server needs a flock of Connection
81 # instances each with its own socket.
83 # Connections are timed out and removed when either they haven't seen a
84 # PING for a while (indicating that the server may be stalled or down)
85 # or there has been no message traffic to them for a while, or
86 # even if the queue is nonempty but efforts to connect have failed for
89 # There are multiple threads. One accepts incoming traffic from all
90 # servers. Each Connection also has a consumer thread and a
91 # thread-safe message queue. The program main appends messages to
92 # queues as JSON requests are received; the consumer threads try to
93 # ship them to servers. When a socket write stalls, it only blocks an
94 # individual consumer thread; if it stalls long enough, the session
95 # will be timed out. This solves the biggest problem with a
96 # single-threaded implementation, which is that you can't count on a
97 # single stalled write not hanging all other traffic - you're at the
98 # mercy of the length of the buffers in the TCP/IP layer.
100 # Message delivery is thus not reliable in the face of network stalls,
101 # but this was considered acceptable because IRC (notoriously) has the
102 # same problem - there is little point in reliable delivery to a relay
103 # that is down or unreliable.
105 # This code uses only NICK, JOIN, PART, MODE, PRIVMSG, USER, and QUIT.
106 # It is strictly compliant to RFC1459, except for the interpretation and
107 # use of the DEAF and CHANLIMIT and (obsolete) MAXCHANNELS features.
109 # CHANLIMIT is as described in the Internet RFC draft
110 # draft-brocklesby-irc-isupport-03 at <http://www.mirc.com/isupport.html>.
111 # The ",isnick" feature is as described in
112 # <http://ftp.ics.uci.edu/pub/ietf/uri/draft-mirashi-url-irc-01.txt>.
114 # Historical note: the IRCClient and IRCServerConnection classes
115 # (~270LOC) replace the overweight, overcomplicated 3KLOC mass of
116 # irclib code that irker formerly used as a service library. They
117 # still look similar to parts of irclib because I contributed to that
118 # code before giving up on it.
120 class IRCError(Exception):
125 class InvalidRequest (ValueError):
126 "An invalid JSON request"
131 "An IRC client session to one or more servers."
133 self.mutex = threading.RLock()
134 self.server_connections = []
135 self.event_handlers = {}
136 self.add_event_handler("ping",
137 lambda c, e: c.ship("PONG %s" % e.target))
140 "Initialize a new server-connection object."
141 conn = IRCServerConnection(self)
143 self.server_connections.append(conn)
146 def spin(self, timeout=0.2):
147 "Spin processing data from connections forever."
148 # Outer loop should specifically *not* be mutex-locked.
149 # Otherwise no other thread would ever be able to change
150 # the shared state of an IRC object running this function.
154 connected = [x for x in self.server_connections
155 if x is not None and x.socket is not None]
156 sockets = [x.socket for x in connected]
158 connmap = dict([(c.socket.fileno(), c) for c in connected])
159 (insocks, _o, _e) = select.select(sockets, [], [], timeout)
161 connmap[s.fileno()].consume()
164 time.sleep(nextsleep)
166 def add_event_handler(self, event, handler):
167 "Set a handler to be called later."
169 event_handlers = self.event_handlers.setdefault(event, [])
170 event_handlers.append(handler)
172 def handle_event(self, connection, event):
174 h = self.event_handlers
175 th = sorted(h.get("all_events", []) + h.get(event.type, []))
177 handler(connection, event)
179 def drop_connection(self, connection):
181 self.server_connections.remove(connection)
184 class LineBufferedStream():
185 "Line-buffer a read stream."
186 crlf_re = re.compile(b'\r?\n')
191 def append(self, newbytes):
192 self.buffer += newbytes
195 "Iterate over lines in the buffer."
196 lines = LineBufferedStream.crlf_re.split(self.buffer)
197 self.buffer = lines.pop()
203 class IRCServerConnectionError(IRCError):
206 class IRCServerConnection():
207 command_re = re.compile("^(:(?P<prefix>[^ ]+) +)?(?P<command>[^ ]+)( *(?P<argument> .+))?")
208 # The full list of numeric-to-event mappings is in Perl's Net::IRC.
209 # We only need to ensure that if some ancient server throws numerics
210 # for the ones we actually want to catch, they're mapped.
213 "005": "featurelist",
214 "432": "erroneusnickname",
215 "433": "nicknameinuse",
216 "436": "nickcollision",
217 "437": "unavailresource",
220 def __init__(self, master):
224 def connect(self, server, port, nickname,
225 password=None, username=None, ircname=None):
226 LOG.debug("connect(server=%r, port=%r, nickname=%r, ...)" % (
227 server, port, nickname))
228 if self.socket is not None:
229 self.disconnect("Changing servers")
231 self.buffer = LineBufferedStream()
232 self.event_handlers = {}
233 self.real_server_name = ""
235 self.nickname = nickname
237 self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
238 self.socket.bind(('', 0))
239 self.socket.connect((server, port))
240 except socket.error as err:
241 raise IRCServerConnectionError("Couldn't connect to socket: %s" % err)
244 self.ship("PASS " + password)
245 self.nick(self.nickname)
246 self.user(username=username or ircname, realname=ircname or nickname)
250 # Without this thread lock, there is a window during which
251 # select() can find a closed socket, leading to an EBADF error.
252 with self.master.mutex:
253 self.disconnect("Closing object")
254 self.master.drop_connection(self)
258 incoming = self.socket.recv(16384)
260 # Server hung up on us.
261 self.disconnect("Connection reset by peer")
264 # Dead air also indicates a connection reset.
265 self.disconnect("Connection reset by peer")
268 self.buffer.append(incoming)
270 for line in self.buffer:
271 LOG.debug("FROM: %s" % line)
279 self.handle_event(Event("every_raw_message",
280 self.real_server_name,
284 m = IRCServerConnection.command_re.match(line)
285 if m.group("prefix"):
286 prefix = m.group("prefix")
287 if not self.real_server_name:
288 self.real_server_name = prefix
289 if m.group("command"):
290 command = m.group("command").lower()
291 if m.group("argument"):
292 a = m.group("argument").split(" :", 1)
293 arguments = a[0].split()
295 arguments.append(a[1])
297 command = IRCServerConnection.codemap.get(command, command)
298 if command in ["privmsg", "notice"]:
299 target = arguments.pop(0)
303 if command == "quit":
304 arguments = [arguments[0]]
305 elif command == "ping":
306 target = arguments[0]
308 target = arguments[0]
309 arguments = arguments[1:]
311 LOG.debug("command: %s, source: %s, target: %s, arguments: %s" % (
312 command, prefix, target, arguments))
313 self.handle_event(Event(command, prefix, target, arguments))
315 def handle_event(self, event):
316 self.master.handle_event(self, event)
317 if event.type in self.event_handlers:
318 for fn in self.event_handlers[event.type]:
321 def is_connected(self):
322 return self.socket is not None
324 def disconnect(self, message=""):
325 if self.socket is None:
327 # Don't send a QUIT here - causes infinite loop!
329 self.socket.shutdown(socket.SHUT_WR)
335 self.handle_event(Event("disconnect", self.server, "", [message]))
337 def join(self, channel, key=""):
338 self.ship("JOIN %s%s" % (channel, (key and (" " + key))))
340 def mode(self, target, command):
341 self.ship("MODE %s %s" % (target, command))
343 def nick(self, newnick):
344 self.ship("NICK " + newnick)
346 def part(self, channel, message=""):
347 cmd_parts = ['PART', channel]
349 cmd_parts.append(message)
350 self.ship(' '.join(cmd_parts))
352 def privmsg(self, target, text):
353 self.ship("PRIVMSG %s :%s" % (target, text))
355 def quit(self, message=""):
356 self.ship("QUIT" + (message and (" :" + message)))
358 def user(self, username, realname):
359 self.ship("USER %s 0 * :%s" % (username, realname))
361 def ship(self, string):
362 "Ship a command to the server, appending CR/LF"
364 self.socket.send(string.encode('utf-8') + b'\r\n')
365 LOG.debug("TO: %s" % string)
367 self.disconnect("Connection reset by peer.")
370 def __init__(self, evtype, source, target, arguments=None):
374 if arguments is None:
376 self.arguments = arguments
378 def is_channel(string):
379 return string and string[0] in "#&+!"
382 def __init__(self, irkerd, servername, port):
384 self.servername = servername
386 self.nick_trial = None
387 self.connection = None
389 self.last_xmit = time.time()
390 self.last_ping = time.time()
391 self.channels_joined = {}
392 self.channel_limits = {}
393 # The consumer thread
394 self.queue = Queue.Queue()
396 def nickname(self, n=None):
397 "Return a name for the nth server connection."
401 return (namestyle % n)
404 def handle_ping(self):
405 "Register the fact that the server has pinged this connection."
406 self.last_ping = time.time()
407 def handle_welcome(self):
408 "The server says we're OK, with a non-conflicting nick."
409 self.status = "ready"
410 LOG.info("nick %s accepted" % self.nickname())
412 self.connection.privmsg("nickserv", "identify %s" % password)
413 def handle_badnick(self):
414 "The server says our nick is ill-formed or has a conflict."
415 LOG.info("nick %s rejected" % self.nickname())
417 # Randomness prevents a malicious user or bot from
418 # anticipating the next trial name in order to block us
419 # from completing the handshake.
420 self.nick_trial += random.randint(1, 3)
421 self.last_xmit = time.time()
422 self.connection.nick(self.nickname())
423 # Otherwise fall through, it might be possible to
425 def handle_disconnect(self):
426 "Server disconnected us for flooding or some other reason."
427 self.connection = None
428 if self.status != "expired":
429 self.status = "disconnected"
430 def handle_kick(self, outof):
432 self.status = "handshaking"
434 del self.channels_joined[outof]
436 LOG.error("kicked by %s from %s that's not joined" % (
437 self.servername, outof))
439 while not self.queue.empty():
440 (channel, message, key) = self.queue.get()
442 qcopy.append((channel, message, key))
443 for (channel, message, key) in qcopy:
444 self.queue.put((channel, message, key))
445 self.status = "ready"
446 def enqueue(self, channel, message, key, quit_after=False):
447 "Enque a message for transmission."
448 if self.thread is None or not self.thread.is_alive():
449 self.status = "unseen"
450 self.thread = threading.Thread(target=self.dequeue)
451 self.thread.setDaemon(True)
453 self.queue.put((channel, message, key))
455 self.queue.put((channel, None, key))
457 "Try to ship pending messages from the queue."
460 # We want to be kind to the IRC servers and not hold unused
461 # sockets open forever, so they have a time-to-live. The
462 # loop is coded this particular way so that we can drop
463 # the actual server connection when its time-to-live
464 # expires, then reconnect and resume transmission if the
465 # queue fills up again.
466 if self.queue.empty():
467 # Queue is empty, at some point we want to time out
468 # the connection rather than holding a socket open in
469 # the server forever.
471 xmit_timeout = now > self.last_xmit + XMIT_TTL
472 ping_timeout = now > self.last_ping + PING_TTL
473 if self.status == "disconnected":
474 # If the queue is empty, we can drop this connection.
475 self.status = "expired"
477 elif xmit_timeout or ping_timeout:
479 "timing out connection to %s at %s "
480 "(ping_timeout=%s, xmit_timeout=%s)") % (
481 self.servername, time.asctime(), ping_timeout,
483 with self.irker.irc.mutex:
484 self.connection.context = None
485 self.connection.quit("transmission timeout")
486 self.connection = None
487 self.status = "disconnected"
489 # Prevent this thread from hogging the CPU by pausing
490 # for just a little bit after the queue-empty check.
491 # As long as this is less that the duration of a human
492 # reflex arc it is highly unlikely any human will ever
494 time.sleep(ANTI_BUZZ_DELAY)
495 elif self.status == "disconnected" \
496 and time.time() > self.last_xmit + DISCONNECT_TTL:
497 # Queue is nonempty, but the IRC server might be
498 # down. Letting failed connections retain queue
499 # space forever would be a memory leak.
500 self.status = "expired"
502 elif not self.connection and self.status != "expired":
503 # Queue is nonempty but server isn't connected.
504 with self.irker.irc.mutex:
505 self.connection = self.irker.irc.newserver()
506 self.connection.context = self
507 # Try to avoid colliding with other instances
508 self.nick_trial = random.randint(1, 990)
509 self.channels_joined = {}
512 # IRCServerConnectionError on failure
513 self.connection.connect(self.servername,
515 nickname=self.nickname(),
517 ircname="irker relaying client")
518 self.status = "handshaking"
519 LOG.info("XMIT_TTL bump (%s connection) at %s" % (
520 self.servername, time.asctime()))
521 self.last_xmit = time.time()
522 self.last_ping = time.time()
523 except IRCServerConnectionError:
524 self.status = "expired"
526 elif self.status == "handshaking":
527 if time.time() > self.last_xmit + HANDSHAKE_TTL:
528 self.status = "expired"
531 # Don't buzz on the empty-queue test while we're
533 time.sleep(ANTI_BUZZ_DELAY)
534 elif self.status == "unseen" \
535 and time.time() > self.last_xmit + UNSEEN_TTL:
536 # Nasty people could attempt a denial-of-service
537 # attack by flooding us with requests with invalid
538 # servernames. We guard against this by rapidly
539 # expiring connections that have a nonempty queue but
540 # have never had a successful open.
541 self.status = "expired"
543 elif self.status == "ready":
544 (channel, message, key) = self.queue.get()
545 if channel not in self.channels_joined:
546 self.connection.join(channel, key=key)
547 LOG.info("joining %s on %s." % (
548 channel, self.servername))
549 # None is magic - it's a request to quit the server
551 self.connection.quit()
552 # An empty message might be used as a keepalive or
553 # to join a channel for logging, so suppress the
554 # privmsg send unless there is actual traffic.
556 for segment in message.split("\n"):
557 # Truncate the message if it's too long,
558 # but we're working with characters here,
559 # not bytes, so we could be off.
560 # 500 = 512 - CRLF - 'PRIVMSG ' - ' :'
561 maxlength = 500 - len(channel)
562 if len(segment) > maxlength:
563 segment = segment[:maxlength]
565 self.connection.privmsg(channel, segment)
566 except ValueError as err:
568 "irclib rejected a message to %s on %s "
570 channel, self.servername, str(err)))
571 LOG.debug(err.format_exc())
572 time.sleep(ANTI_FLOOD_DELAY)
573 self.last_xmit = self.channels_joined[channel] = time.time()
574 LOG.info("XMIT_TTL bump (%s transmission) at %s" % (
575 self.servername, time.asctime()))
576 self.queue.task_done()
577 elif self.status == "expired":
578 print "We're expired but still running! This is a bug."
581 LOG.error("exception %s in thread for %s" % (
583 # Maybe this should have its own status?
584 self.status = "expired"
585 LOG.debug(e.format_exc())
588 # Make sure we don't leave any zombies behind
589 self.connection.close()
591 # Irclib has a habit of throwing fresh exceptions here. Ignore that
594 "Should this connection not be scavenged?"
595 return self.status != "expired"
596 def joined_to(self, channel):
597 "Is this connection joined to the specified channel?"
598 return channel in self.channels_joined
599 def accepting(self, channel):
600 "Can this connection accept a join of this channel?"
601 if self.channel_limits:
603 for already in self.channels_joined:
604 # This obscure code is because the RFCs allow separate limits
605 # by channel type (indicated by the first character of the name)
606 # a feature that is almost never actually used.
607 if already[0] == channel[0]:
609 return match_count < self.channel_limits.get(channel[0], CHANNEL_MAX)
611 return len(self.channels_joined) < CHANNEL_MAX
614 "Represent a transmission target."
615 def __init__(self, url):
617 # Pre-2.6 Pythons don't recognize irc: as a valid URL prefix.
618 url = url.replace("irc://", "http://")
619 parsed = urlparse.urlparse(url)
620 irchost, _, ircport = parsed.netloc.partition(':')
623 self.servername = irchost
624 # IRC channel names are case-insensitive. If we don't smash
625 # case here we may run into problems later. There was a bug
626 # observed on irc.rizon.net where an irkerd user specified #Channel,
627 # got kicked, and irkerd crashed because the server returned
628 # "#channel" in the notification that our kick handler saw.
629 self.channel = parsed.path.lstrip('/').lower()
630 # This deals with a tweak in recent versions of urlparse.
632 self.channel += "#" + parsed.fragment
633 isnick = self.channel.endswith(",isnick")
635 self.channel = self.channel[:-7]
636 if self.channel and not isnick and self.channel[0] not in "#&+":
637 self.channel = "#" + self.channel
638 # support both channel?secret and channel?key=secret
641 self.key = re.sub("^key=", "", parsed.query)
642 self.port = int(ircport)
645 "Represent this instance as a string"
646 return self.servername or self.url or repr(self)
649 "Raise InvalidRequest if the URL is missing a critical component"
650 if not self.servername:
651 raise InvalidRequest(
652 'target URL missing a servername: %r' % self.url)
654 raise InvalidRequest(
655 'target URL missing a channel: %r' % self.url)
657 "Return a hashable tuple representing the destination server."
658 return (self.servername, self.port)
661 "Manage connections to a particular server-port combination."
662 def __init__(self, irkerd, servername, port):
664 self.servername = servername
666 self.connections = []
667 def dispatch(self, channel, message, key, quit_after=False):
668 "Dispatch messages for our server-port combination."
669 # First, check if there is room for another channel
670 # on any of our existing connections.
671 connections = [x for x in self.connections if x.live()]
672 eligibles = [x for x in connections if x.joined_to(channel)] \
673 or [x for x in connections if x.accepting(channel)]
675 eligibles[0].enqueue(channel, message, key, quit_after)
677 # All connections are full up. Look for one old enough to be
680 for connection in connections:
681 for (chan, age) in connections.channels_joined.items():
682 if age < time.time() - CHANNEL_TTL:
683 ancients.append((connection, chan, age))
685 ancients.sort(key=lambda x: x[2])
686 (found_connection, drop_channel, _drop_age) = ancients[0]
687 found_connection.part(drop_channel, "scavenged by irkerd")
688 del found_connection.channels_joined[drop_channel]
689 #time.sleep(ANTI_FLOOD_DELAY)
690 found_connection.enqueue(channel, message, key, quit_after)
692 # Didn't find any channels with no recent activity
693 newconn = Connection(self.irker,
696 self.connections.append(newconn)
697 newconn.enqueue(channel, message, key, quit_after)
699 "Does this server-port combination have any live connections?"
700 self.connections = [x for x in self.connections if x.live()]
701 return len(self.connections) > 0
703 "Return all connections with pending traffic."
704 return [x for x in self.connections if not x.queue.empty()]
706 "Return the time of the most recent transmission."
707 return max(x.last_xmit for x in self.connections)
710 "Persistent IRC multiplexer."
712 self.irc = IRCClient()
713 self.irc.add_event_handler("ping", self._handle_ping)
714 self.irc.add_event_handler("welcome", self._handle_welcome)
715 self.irc.add_event_handler("erroneusnickname", self._handle_badnick)
716 self.irc.add_event_handler("nicknameinuse", self._handle_badnick)
717 self.irc.add_event_handler("nickcollision", self._handle_badnick)
718 self.irc.add_event_handler("unavailresource", self._handle_badnick)
719 self.irc.add_event_handler("featurelist", self._handle_features)
720 self.irc.add_event_handler("disconnect", self._handle_disconnect)
721 self.irc.add_event_handler("kick", self._handle_kick)
722 self.irc.add_event_handler("every_raw_message", self._handle_every_raw_message)
724 def thread_launch(self):
725 thread = threading.Thread(target=self.irc.spin)
726 thread.setDaemon(True)
727 self.irc._thread = thread
729 def _handle_ping(self, connection, _event):
730 "PING arrived, bump the last-received time for the connection."
731 if connection.context:
732 connection.context.handle_ping()
733 def _handle_welcome(self, connection, _event):
734 "Welcome arrived, nick accepted for this connection."
735 if connection.context:
736 connection.context.handle_welcome()
737 def _handle_badnick(self, connection, _event):
738 "Nick not accepted for this connection."
739 if connection.context:
740 connection.context.handle_badnick()
741 def _handle_features(self, connection, event):
742 "Determine if and how we can set deaf mode."
743 if connection.context:
744 cxt = connection.context
745 arguments = event.arguments
746 for lump in arguments:
747 if lump.startswith("DEAF="):
749 connection.mode(cxt.nickname(), "+"+lump[5:])
750 elif lump.startswith("MAXCHANNELS="):
753 cxt.channel_limits[pref] = m
754 LOG.info("%s maxchannels is %d" % (connection.server, m))
755 elif lump.startswith("CHANLIMIT=#:"):
756 limits = lump[10:].split(",")
759 (prefixes, limit) = token.split(":")
762 cxt.channel_limits[c] = limit
763 LOG.info("%s channel limit map is %s" % (
764 connection.server, cxt.channel_limits))
766 LOG.error("ill-formed CHANLIMIT property")
767 def _handle_disconnect(self, connection, _event):
768 "Server hung up the connection."
769 LOG.info("server %s disconnected" % connection.server)
771 if connection.context:
772 connection.context.handle_disconnect()
773 def _handle_kick(self, connection, event):
774 "Server hung up the connection."
775 target = event.target
776 LOG.info("irker has been kicked from %s on %s" % (
777 target, connection.server))
778 if connection.context:
779 connection.context.handle_kick(target)
780 def _handle_every_raw_message(self, _connection, event):
781 "Log all messages when in watcher mode."
783 with open(logfile, "a") as logfp:
784 logfp.write("%03f|%s|%s\n" % \
785 (time.time(), event.source, event.arguments[0]))
787 "Do we have any pending message traffic?"
788 return [k for (k, v) in self.servers.items() if v.pending()]
790 def _parse_request(self, line):
791 "Request-parsing helper for the handle() method"
792 request = json.loads(line.strip())
793 if not isinstance(request, dict):
794 raise InvalidRequest(
795 "request is not a JSON dictionary: %r" % request)
796 if "to" not in request or "privmsg" not in request:
797 raise InvalidRequest(
798 "malformed request - 'to' or 'privmsg' missing: %r" % request)
799 channels = request['to']
800 message = request['privmsg']
801 if not isinstance(channels, (list, basestring)):
802 raise InvalidRequest(
803 "malformed request - unexpected channel type: %r" % channels)
804 if not isinstance(message, basestring):
805 raise InvalidRequest(
806 "malformed request - unexpected message type: %r" % message)
807 if not isinstance(channels, list):
808 channels = [channels]
812 if not isinstance(url, basestring):
813 raise InvalidRequest(
814 "malformed request - URL has unexpected type: %r" %
818 except InvalidRequest, e:
821 targets.append(target)
822 return (targets, message)
824 def handle(self, line, quit_after=False):
825 "Perform a JSON relay request."
827 targets, message = self._parse_request(line=line)
828 for target in targets:
829 if target.server() not in self.servers:
830 self.servers[target.server()] = Dispatcher(
831 self, target.servername, target.port)
832 self.servers[target.server()].dispatch(
833 target.channel, message, target.key, quit_after=quit_after)
834 # GC dispatchers with no active connections
835 servernames = self.servers.keys()
836 for servername in servernames:
837 if not self.servers[servername].live():
838 del self.servers[servername]
839 # If we might be pushing a resource limit even
840 # after garbage collection, remove a session. The
841 # goal here is to head off DoS attacks that aim at
842 # exhausting thread space or file descriptors.
843 # The cost is that attempts to DoS this service
844 # will cause lots of join/leave spam as we
845 # scavenge old channels after connecting to new
846 # ones. The particular method used for selecting a
847 # session to be terminated doesn't matter much; we
848 # choose the one longest idle on the assumption
849 # that message activity is likely to be clumpy.
850 if len(self.servers) >= CONNECTION_MAX:
853 key=lambda name: self.servers[name].last_xmit())
854 del self.servers[oldest]
855 except InvalidRequest, e:
858 self.logerr("can't recognize JSON on input: %r" % line)
860 self.logerr("wildly malformed JSON blew the parser stack.")
862 class IrkerTCPHandler(SocketServer.StreamRequestHandler):
865 line = self.rfile.readline()
868 irker.handle(line.strip())
870 class IrkerUDPHandler(SocketServer.BaseRequestHandler):
872 data = self.request[0].strip()
873 #socket = self.request[1]
879 irkerd [-d debuglevel] [-l logfile] [-n nick] [-p password] [-i channel message] [-V] [-h]
885 -p set nickserv password
887 -V return irkerd version
888 -h print this help dialog
891 if __name__ == '__main__':
894 namestyle = "irker%03d"
898 (options, arguments) = getopt.getopt(sys.argv[1:], "d:i:l:n:p:Vh")
899 except getopt.GetoptError as e:
900 sys.stderr.write("%s" % e)
903 for (opt, val) in options:
904 if opt == '-d': # Enable debug/progress messages
905 if val.lower() not in LOG_LEVELS:
906 sys.stderr.write('invalid log level %r (choices: %s)\n' % (
907 val, ', '.join(LOG_LEVELS)))
909 log_level = getattr(logging, val.upper())
910 elif opt == '-i': # Immediate mode - send one message, then exit.
912 elif opt == '-l': # Logfile mode - report traffic read in
914 elif opt == '-n': # Force the nick
916 elif opt == '-p': # Set a nickserv password
918 elif opt == '-V': # Emit version and exit
919 sys.stdout.write("irkerd version %s\n" % version)
925 handler = logging.StreamHandler()
926 LOG.addHandler(handler)
928 LOG.setLevel(log_level)
930 fallback = re.search("%.*d", namestyle)
932 LOG.info("irkerd version %s" % version)
934 irker.irc.add_event_handler("quit", lambda _c, _e: sys.exit(0))
935 irker.handle('{"to":"%s","privmsg":"%s"}' % (immediate, arguments[0]), quit_after=True)
938 irker.thread_launch()
940 tcpserver = SocketServer.TCPServer((HOST, PORT), IrkerTCPHandler)
941 udpserver = SocketServer.UDPServer((HOST, PORT), IrkerUDPHandler)
942 for server in [tcpserver, udpserver]:
943 server = threading.Thread(target=server.serve_forever)
944 server.setDaemon(True)
948 except KeyboardInterrupt:
950 except socket.error, e:
951 sys.stderr.write("irkerd: server launch failed: %r\n" % e)