h/core/irc.py

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Python
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import sys
import re
import socket
import thread
import asyncore
import asynchat
import Queue
def decode(txt):
for codec in ('utf-8', 'iso-8859-1', 'shift_jis', 'cp1252'):
try:
return txt.decode(codec)
except UnicodeDecodeError:
continue
return txt.decode('utf-8', 'ignore')
class crlf_tcp(asynchat.async_chat):
"Handles tcp connections that consist of utf-8 lines ending with crlf"
def __init__(self, host, port):
asynchat.async_chat.__init__(self)
self.set_terminator('\r\n')
self.buffer = ""
self.obuffer = ""
self.oqueue = Queue.Queue() #where we stick things that need to be sent
self.iqueue = Queue.Queue() #where we stick things that were received
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.socket.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 0)
self.host = host
self.port = port
def run(self):
self.connect((self.host, self.port))
asyncore.loop()
def handle_connect(self):
thread.start_new_thread(self.queue_read_loop, ())
def queue_read_loop(self):
while True:
line = self.oqueue.get().splitlines()[0][:500]
print ">>> %r" % line
self.push(line.encode('utf-8', 'replace') + '\r\n')
def collect_incoming_data(self, data):
self.buffer += data
def found_terminator(self):
line = self.buffer
self.iqueue.put(decode(line))
self.buffer = ''
irc_prefix_rem = re.compile(r'(.*?) (.*?) (.*)').match
irc_noprefix_rem = re.compile(r'()(.*?) (.*)').match
irc_netmask_rem = re.compile(r':?([^!@]*)!?([^@]*)@?(.*)').match
irc_param_ref = re.compile(r'(?:^|(?<= ))(:.*|[^ ]+)').findall
class irc(object):
"handles the IRC protocol"
#see the docs/ folder for more information on the protocol
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def __init__(self, server, nick, port=6667, channels=[]):
self.server = server
self.conn = crlf_tcp(server, port)
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self.channels = channels
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thread.start_new_thread(self.conn.run, ())
self.out = Queue.Queue() #responses from the server are placed here
# format: [rawline, prefix, command, params,
# nick, user, host, paramlist, msg]
self.nick = nick
self.set_nick(nick)
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self.cmd("USER", ["skybot v0.01", "0", "bot"])
thread.start_new_thread(self.parse_loop, ())
def parse_loop(self):
while True:
msg = self.conn.iqueue.get()
if msg.startswith(":"): #has a prefix
prefix, command, params = irc_prefix_rem(msg).groups()
else:
prefix, command, params = irc_noprefix_rem(msg).groups()
nick, user, host = irc_netmask_rem(prefix).groups()
paramlist = irc_param_ref(params)
lastparam = ""
if paramlist and paramlist[-1].startswith(':'):
lastparam = paramlist[-1][1:]
self.out.put([msg, prefix, command, params, nick, user, host,
paramlist, lastparam])
if command == "PING":
self.cmd("PONG", [params])
def set_nick(self, nick):
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self.cmd("NICK", [nick])
def join(self, channel):
self.cmd("JOIN", [":"+channel])
def msg(self, target, text):
self.cmd("PRIVMSG", [target, ":"+text])
def cmd(self, command, params=None):
if params:
self.send(command+' '+' '.join(params))
else:
self.send(command)
def send(self, str):
self.conn.oqueue.put(str)