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exchanger.py
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exchanger.py
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import asyncore
import logging
import re
import socket
import time
from util import IRCMessage
replay_commands = [
# Connection replies
"001", "002", "003", "004", "005",
# Server info
"251", "252", "253", "254", "255",
"JOIN"
]
logger = logging.getLogger()
logger.setLevel(10)
logging.basicConfig(format="[%(asctime)s] [%(levelname)s] %(message)s")
server_handlers = {}
def server_watch(command):
def wrap(new_class):
if command not in server_handlers:
server_handlers[command] = []
server_handlers[command].append(new_class())
return wrap
@server_watch(command="PING")
class PING(object):
def handle(self, exchanger, line):
pong = line["raw"].replace("PING", "PONG")
exchanger.send_line(pong)
"""
Class responsible for maintaining an IRC connection
"""
class IRCExchanger(asyncore.dispatcher):
def __init__(self, settings):
asyncore.dispatcher.__init__(self)
self.settings = settings
self.recv_buffer = ""
self.send_buffer = ""
self.all_replay = []
self.clients = []
self.server_connect()
def send_line(self, line):
logging.debug("(TO SERVER) \"{0}\"".format(line))
# if line[:4] == "QUIT":
# return
self.send_buffer += line + "\n"
self.handle_write()
# Establish connection to IRC server
def server_connect(self):
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.connect((self.settings["server"], self.settings["port"]))
# Register user with server after connecting
def handle_connect(self):
print "handle_connect"
# if "pass" in self.settings:
# pass_cmd = "PASS {0}".format(self.settings["pass"])
# self.send_line(pass_cmd)
user_cmd = "USER {user} * * :{real_name}".format(**self.settings)
self.send_line(user_cmd)
nick_cmd = "NICK {0}".format(self.settings["nick"])
self.send_line(nick_cmd)
def handle_close(self):
print "handle_close"
self.close()
time.sleep(10)
self.server_connect()
# Deals with individual lines from the IRC server
def handle_line(self, line):
match_dict = IRCMessage.parse(line)
logging.debug("(FROM SERVER) Prefix: \"{prefix}\", Command: \"{command}\", Params: \"{params}\", Trailing: \"{trailing}\"".format(**match_dict))
if match_dict["command"] in replay_commands:
self.all_replay.append(match_dict)
if match_dict["command"] in server_handlers:
for handler in server_handlers[match_dict["command"]]:
handler.handle(self, match_dict)
self.send_line("JOIN #bbeggs")
else:
self.client_send(line)
# Receives data from the IRC connection and breaks it into lines
def handle_read(self):
self.recv_buffer += self.recv(5120)
lines = self.recv_buffer.split("\n")
for line in lines[:]:
if not line:
continue
if line[-1] == "\r":
lines.remove(line)
self.handle_line(line)
self.recv_buffer = "\n".join(lines)
# Sends text to the IRC server
def handle_write(self):
sent = self.send(self.send_buffer)
self.send_buffer = self.send_buffer[sent:]
# Sends text to registered clients
def client_send(self, line):
for client in self.clients:
client.send_line(line)
def register_client(self, client):
self.clients.append(client)
for command in self.all_replay:
client.send_line(command["raw"])
def writable(self):
return (len(self.send_buffer) > 0)