[Python-*-读书]Python基础教程--虚拟茶话会

Python教程这里是第二十四章的源码，练习研究之用

[python]
#coding:utf8
#python2.7 chatSer2.py
#稍微复杂一点的聊天室服务器
'''''
用python启动服务 telnet连接之后就可以变成简单的聊天服务器
第一次登陆：login name
登出： logout
说话： say
查看谁登陆过服务器：who
查看同一个房间的人 : look

简单例子：
telnet localhost 50005
Welcome to TestChat
login tianshi
diyu has entered the room.
nih
Unknown command: ih
say nihao
tianshi: nihao
diyu: niyehao

'''

from asyncore import dispatcher
from asynchat import async_chat
import socket
import asyncore

HOST = ''
PORT = 50005
SERVERCONF = (HOST,PORT)
NAME = 'TestChat'

class EndSession(Exception):
    pass

class CommandHandler(object):
    '''''
    命令解析类
    '''

    def unknown(self,session,cmd):
        '响应未知的命令'
        session.push('Unknown command:%s \r\n' %cmd)

    def handle(self,session,line):
        '处理从客户端发来的信息解析命令和内容'
        if not line:
            print 'please write a command...'

        if not line.strip():
            print 'get a line :',line
            return

        parts = line.split(' ',1)
        #命令分离
        cmd = parts[0]
        try:
            line = parts[1].strip()
        except IndexError:
            line = ''
        #调用相应的方法处理命令
        meth = getattr(self, 'do_'+cmd, None)
        try:
            #调用命令对应的方法
            meth(session,line)
        except TypeError:
            self.unknown(session, cmd)

class Room(CommandHandler):
    '''''
    包括一个或多个用户（会话）的泛型环境。负责处理基本的命令和广播
    '''

    def __init__(self,server):
        self.server = server
        self.sessions = []

    def add(self, session):
        'add a user'
        self.sessions.append(session)

    def remove(self,session):
        'a user leave'
        self.sessions.remove(session)

    def broadcast(self,line):
        'give all session in the room a line'
        for session in self.sessions:
            session.push(line)

    def do_logout(self,session,line):
        '响应登出命令'
        raise EndSession

class LoginRoom(Room):
    '''''
    为刚刚登陆的用户准备的房间
    '''

    def add(self,session):
        Room.add(self, session)
        self.broadcast('Welcome to %s \r\n' %self.server.name)

    def unknown(self, session, cmd):
        session.push('Please login \nUse "login <nick>"\r\n')

    def do_login(self, session, line):
        name = line.strip()
        #登陆时必须指定一个用户名
        if not name:
            session.push('Please enter a name\r\n')
        elif name in self.server.users: #用户名不可重复？
            session.push('The name "%s" is taken! \r\n' %name)
            session.push('Please try again.\r\n')
        else:
            session.name = name
            session.enter(self.server.main_room)

class ChatRoom(Room):
    '''''
    为多用户在一起聊天准备的房间
    '''
    def add(self, session):
        #tell all new one come
        self.broadcast(session.name +' has entered the room. \r\n')
        self.server.users[session.name] = session
        Room.add(self,

补充：Web开发 , Python ,