117 lines
3.8 KiB
Python
117 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
import asyncio
|
|
import inspect
|
|
import logging
|
|
|
|
logging.basicConfig(format='[%(asctime)s] [%(levelname)s] %(message)s', level=logging.DEBUG, datefmt='%d.%m.%Y %H:%M:%S')
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class ManagedProtocol(asyncio.Protocol):
|
|
"""Basic managed protocol handler, registers itself to ConnectionManager.
|
|
"""
|
|
|
|
def __init__(self, loop, connection_manager, endpoint):
|
|
self._loop = loop
|
|
self._connection_manager = connection_manager
|
|
self._endpoint = endpoint
|
|
self._transport = None
|
|
|
|
def _log(self, msg):
|
|
host, port = self._endpoint
|
|
logger.info("[{}:{}] ".format(host, port)+str(msg))
|
|
|
|
def connection_made(self, transport):
|
|
self._connection_manager.register_active_connection(self._endpoint, self)
|
|
self._transport = transport
|
|
self._log("Connection made!")
|
|
host, port = transport.get_extra_info('peername')
|
|
self._log('Connected to: {}:{}'.format(host, port))
|
|
|
|
def data_received(self, data):
|
|
self._log(data)
|
|
# TODO: parse and call more methodes / on itself for events or something
|
|
|
|
def eof_received(self):
|
|
self._log("Eof received!")
|
|
|
|
def connection_lost(self, exc):
|
|
self._log("Connection lost!")
|
|
self._connection_manager.unregister_active_connection(self._endpoint)
|
|
|
|
def destroy(self):
|
|
""" Triggered by ConnectionManager.remove_endpoint(). Closes transport. """
|
|
self._transport.close()
|
|
|
|
|
|
class IrcProtocol(ManagedProtocol):
|
|
def __init__(self):
|
|
pass
|
|
|
|
|
|
class ConnectionManager(object):
|
|
"""Takes care of known endpoints that a connections shall be established to.
|
|
"""
|
|
|
|
def __init__(self, loop):
|
|
self._loop = loop
|
|
self._endpoints = []
|
|
self._active_connections = {}
|
|
self._loop.set_exception_handler(self._handle_async_exception)
|
|
|
|
def add_endpoint(self, endpoint):
|
|
logger.debug("Endpoint added: {}:{}".format(*endpoint))
|
|
self._endpoints.append(endpoint)
|
|
self._create_connection(endpoint)
|
|
|
|
def _create_connection(self, endpoint):
|
|
protocol = ManagedProtocol(self._loop, self, endpoint)
|
|
coroutine = self._loop.create_connection(lambda: protocol, *endpoint)
|
|
asyncio.async(coroutine)
|
|
|
|
def remove_endpoint(self, endpoint):
|
|
logger.debug("Endpoint removed: {}:{}".format(*endpoint))
|
|
self._endpoints.remove(endpoint)
|
|
if endpoint in self._active_connections:
|
|
self._active_connections[endpoint].close()
|
|
|
|
def register_active_connection(self, endpoint, protocol):
|
|
self._active_connections[endpoint] = protocol
|
|
|
|
def unregister_active_connection(self, endpoint):
|
|
del self._active_connections[endpoint]
|
|
self._create_connection(endpoint)
|
|
|
|
def _handle_async_exception(self, loop, context):
|
|
"""Trying to take care of connection related exceptions."""
|
|
logger.error("An async exception has been caught: "+str(context['exception']))
|
|
stack = context['future'].get_stack()
|
|
if len(stack) > 1 and stack[1].f_code.co_name == 'create_connection':
|
|
last_stackframe = stack[len(stack)-1]
|
|
call_args = inspect.getargvalues(last_stackframe)
|
|
host = call_args.locals['host']
|
|
port = call_args.locals['port']
|
|
logger.error("Bad endpoint: {}:{}".format(host, port))
|
|
self.remove_endpoint((host, port))
|
|
else:
|
|
loop.call_exception_handler(context)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
freenode = ("irc.freenode.net", 6667)
|
|
euirc = ("irc.euisadasdrc.net", 6667)
|
|
|
|
loop = asyncio.get_event_loop()
|
|
|
|
connection_manager = ConnectionManager(loop)
|
|
connection_manager.add_endpoint(euirc)
|
|
connection_manager.add_endpoint(freenode)
|
|
|
|
try:
|
|
loop.run_forever()
|
|
except KeyboardInterrupt:
|
|
pass
|
|
finally:
|
|
loop.close()
|