基于Twisted的简单聊天室

#coding=utf8
from twisted.internet import reactor, defer
from twisted.protocols.basic import LineReceiver
from twisted.internet.protocol import Factory, Protocol, ServerFactory
import redis


class Server(ServerFactory):
        def __init__(self):
            self.users = {}
            self.last_messages = {}
            self.__db = dbServer
        #def start(self):

        #def stop(self):

        def do_login(self, pro, args):
            username, passwd = args
            if self.__db.get(username) is not None:
                if passwd != self.__db.get(username):
                    return "do_login", False, "login failed"
                else:
                    user = User(username, passwd, pro, 1)
                    self.users[username] = user
                    pro.user = user
                    return "do_login", True, "login success"
            else:
               self.__db.set(username, passwd)
               self.__db.save()
            user = User(username, passwd, pro, 1)
            self.users[username] = user
            pro.user = user
            return "do_login", True, "login success"

        def checklogin(self, user):
            return user.logined

        def do_privatemsg(self, pro, args):
            target, msg = args
            user = pro.user
            if self.checklogin(user):
                self.last_messages[user] = msg
                msg = ‘[‘+user.name+‘]‘ + msg
                return "do_privatemsg", self.users[target], msg

        def do_publicmsg(self, pro, args):
            msg = args
            user = pro.user
            print user.name
            if self.checklogin(user):
                self.last_messages[user] = msg
                msg = ‘[‘+user.name+‘]‘ + msg[0]
                return "do_publicmsg", self.users.values(), msg

class User(object):
        def __init__(self, name, passwd, pro, logined):
                self.name = name
                self.password = passwd
                self.nick_name = ‘&&‘ + name + ‘&&‘
                self.proto = pro
                self.logined = logined

class ChatProtocol(LineReceiver):
        #line format: "func target_name *contents"
        #example: "privatemsg hs how are you....."
        #example: "publicmsg how are you....."
        #example: "login hs password"
        def __init__(self):
            self.user = 0
            self.pro = self

        def connectionMade(self):
            self.sendLine("please input: ‘login,username,password‘")

        def lineReceived(self, line):
            defer.maybeDeferred(self.parse, line).addCallback(self.processor).addCallback(self.ack)

        def parse(self, line):
            result = line.split(‘,‘)
            func = result[0]
            args = result[1:]
            return func, args

        def processor(self, args):
            func, arg = args
            _func = getattr(server, ‘do_‘ + func)
            if _func:
                return _func(self.pro, arg)
            else:
                raise Exception("xxxxx")

        def ack(self, args):
            func, target, msg = args
            if func == ‘do_login‘:
                if not target:
                   self.kickOut()
                self.sendLine(msg)
            elif func == ‘do_privatemsg‘:
                target.proto.sendLine(msg)
            elif func == ‘do_publicmsg‘:
                for user in target:
                    if user.proto != self:
                        user.proto.sendLine(msg)
            else:
                pass

        def kickOut(self):
            self.sendLine(‘passwd is wrong‘)
            self.transport.loseConnection()

class redisServer(object):
        def __init__(self):
            r = redis.Redis(host=‘localhost‘, port=6379, db=0)
            self.db = r
        def set(self, key, value):
            self.db.set(key, value)
        def save(self):
            self.db.save()
        def get(self, key):
            return self.db.get(key)


dbServer = redisServer()
server = Server()
server.protocol = ChatProtocol
reactor.listenTCP(8008,server)
print ‘server start!‘
reactor.run()