h/core/irc.py

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3.7 KiB
Python
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import sys
import re
import socket
import thread
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(object):
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"Handles tcp connections that consist of utf-8 lines ending with crlf"
def __init__(self, host, port):
self.ibuffer = ""
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self.obuffer = ""
self.oqueue = Queue.Queue() # lines to be sent out
self.iqueue = Queue.Queue() # lines that were received
self.socket = socket.socket(socket.AF_INET, socket.TCP_NODELAY)
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self.host = host
self.port = port
def run(self):
self.socket.connect((self.host, self.port))
thread.start_new_thread(self.recv_loop, ())
thread.start_new_thread(self.send_loop, ())
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def recv_loop(self):
while True:
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try:
self.ibuffer += self.socket.recv(4096)
except socket.timeout:
continue
while '\r\n' in self.ibuffer:
line, self.ibuffer = self.ibuffer.split('\r\n', 1)
self.iqueue.put(decode(line))
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def send_loop(self):
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while True:
line = self.oqueue.get().splitlines()[0][:500]
print ">>> %r" % line
self.obuffer += line.encode('utf-8', 'replace') + '\r\n'
while self.obuffer:
sent = self.socket.send(self.obuffer)
self.obuffer = self.obuffer[sent:]
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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
def __init__(self, server, nick, port=6667, channels=[], conf={}):
self.channels = channels
self.conf = conf
self.server = server
self.conn = crlf_tcp(server, port)
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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)
self.cmd("USER", ["skybot", "3", "*",
":Python bot - http://bitbucket.org/Scaevolus/skybot/"])
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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)