Question

I’m in the process of experimenting a bit with the twisted libraries for IRC servers/clients. I’ve found a few good examples of how to implement an IRC client but seem to find anything good on the server side of things. Could anybody provide some insight into how to create a basic IRC server in twisted?

Edit: What about building off of this? Am I going the right direction here?

from twisted.internet.protocol import ServerFactory
from twisted.internet import reactor
from twisted.words.protocols.irc import IRC


class IRCServer(IRC):
    def connectionMade(self):
        print "client connected"

    def handleCommand(self, command, prefix, params):
        print "handle comm"
        IRC.handleCommand(self, command, prefix, params)

    def dataReceived(self, data):
        print "data: %s" % data
        IRC.dataReceived(self, data)

    def irc_unknown(self, prefix, command, params):
        print "%s, %s, %s, IRC UNKNOWN" % (prefix, command, params)

    def irc_USER(self, prefix, params):
        print "USER: %s, %s" % (prefix, params)

    def irc_NICK(self, prefix, params):
        print "NICK: %s, %s" % (prefix, params)



class IRCServerFactory(ServerFactory):
    protocol = IRCServer

factory = IRCServerFactory()
reactor.listenTCP(8002, factory)
reactor.run()

When I try to join the channel I am never able to. I was getting an error relating to not having a handler for a command, so I wrote up the irc_USER and irc_NICK methods but that merely got rid of the error, it didn’t solve the problem of not connecting/not working.

Answer 1

Perhaps something like this?

exarkun@boson:/tmp/irc-server$ cat > passwd
alice:secret
bob:19820522
exarkun@boson:/tmp/irc-server$ twistd -n words --irc-port 6667 --auth file:passwd
2010-06-29 11:51:26-0400 [-] Log opened.
2010-06-29 11:51:26-0400 [-] twistd 10.0.0+r29436 (/usr/bin/python 2.6.4) starting up.
2010-06-29 11:51:26-0400 [-] reactor class: twisted.internet.selectreactor.SelectReactor.
2010-06-29 11:51:26-0400 [-] twisted.words.service.IRCFactory starting on 6667
2010-06-29 11:51:26-0400 [-] Starting factory <twisted.words.service.IRCFactory instance at 0x9ddbf8c>

If you’d like to see how this is implemented, see twisted/words/tap.py

twisted.words.protocols.irc.IRC is a very basic implementation of just the parsing parts of an IRC server. It implements no actual server logic such as channels, modes, messages, etc. You can build a server on it, but you have to build almost the whole thing. This is precisely what the code invoked by twistd words does. You may want to refer to its implementation to see a successful example of what the code in your question is aiming towards.