I have a twisted reactor running, how do I connect to it?

Question

I've been following the tutorials and now have a twisted reactor running. I've used telnet to test that it does stuff but I've not managed to find anything in the twisted tutorials on how to connect to the reactor.

My assumption was there would be something within twisted to do this, should I instead use the built in socket?

Edit:

This is the Server script:

import time
import multiprocessing

from twisted.internet.protocol import Factory
from twisted.protocols.basic import LineReceiver
from twisted.internet import reactor

class TTT(LineReceiver):
    def __init__(self, users):
        self.users = users
        self.name = None
        self.state = "GETNAME"

    def connectionMade(self):
        self.sendLine("You are connected")

    def connectionLost(self, reason):
        if self.users.has_key(self.name):
            del self.users[self.name]

    def lineReceived(self, line):
        if line == "quit":
            reactor.stop()

        if self.state == "GETNAME":
            self.handle_GETNAME(line)
        else:
            self.handle_CHAT(line)

    def handle_GETNAME(self, name):
        if self.users.has_key(name):
            self.sendLine("Name taken, please choose another.")
            return
        self.sendLine("Welcome, %s!" % (name,))
        self.name = name
        self.users[name] = self
        self.state = "CHAT"

    def handle_CHAT(self, message):
        message = "<%s> %s" % (self.name, message)
        for name, protocol in self.users.iteritems():
            if protocol != self:
                protocol.sendLine(message)


class TTTFactory(Factory):
    def __init__(self):
        self.state = [0 for x in range(9)]
        self.turn = -1

        self.users = {} # maps user names to Chat instances

    def make_move(self, player, x, y):
        if player != self.turn:
            return "Not your turn"

        i = x + y * 3

        if self.state[i] != 0:
            return "Invalid move"

        self.state[i] = player

        # Horrizontal
        if self.state[0] == self.state[1] == self.state[2]: return "Win"
        if self.state[3] == self.state[4] == self.state[5]: return "Win"
        if self.state[6] == self.state[7] == self.state[8]: return "Win"

        # Vertical
        if self.state[0] == self.state[3] == self.state[6]: return "Win"
        if self.state[1] == self.state[4] == self.state[7]: return "Win"
        if self.state[2] == self.state[5] == self.state[8]: return "Win"

        # Diagonal
        if self.state[0] == self.state[4] == self.state[8]: return "Win"
        if self.state[6] == self.state[4] == self.state[2]: return "Win"

        # Swap turn
        self.turn = 0 - self.turn
        return "Next move"

    def buildProtocol(self, addr):
        return TTT(self.users)

# def reactor_runner():
def new_server(conn):
    port_num = 8007
    conn.send(port_num)

    reactor.listenTCP(port_num, TTTFactory())
    reactor.run()

I want to have another python program/process send and recieve messages from it. The idea behind the project is create a multiplayer tic tac toe game.

I want to have a server process and 1 or more client processes. For ease of running I'm currently using multiprocessing to run them at the same time. When complete the client process needs to be able to connect over a network as it may not be on the same computer as the host.

Answer 1

Here's a small example of a client capable of connecting to your server above.

from twisted.internet.protocol import ClientFactory
from twisted.protocols.basic import LineReceiver
from twisted.internet import reactor

class TTTClientProtocol(LineReceiver):
    def lineReceived(self, line):
        line = line.strip()
        if line == 'You are connected':
            self.sendLine(self.factory.username)
        else:
            print 'SERVER SAYS:', line

class TTTClientFactory(ClientFactory):
    protocol = TTTClientProtocol 

    def __init__(self, name):
        self.username = name


name = raw_input('Please enter your name: ')
print 'Connecting...'

reactor.connectTCP('localhost', 8007, TTTClientFactory(name))

reactor.run()

I kept it as simple as I could so you could understand it easily, but to implement the chat part I would need code to read from stdin without blocking the reactor. Since you mentioned you're using a GUI instead of terminal standard input/output, then that is a lot easier actually - just choose a reactor compatible with your GUI library and then use your normal GUI events.

Hope that helps...