Python core programming homework 2-9, python core homework 2-9

Python core programming homework 2-9, python core homework 2-9

Some problems are fixed based on the code found on the Internet. Now you can continue to chat with other people after quit is supported. Idea: After A exits, it sends the clear session command to B. After B receives the command, it returns the clear session command to the server. The server clears the session of B (although tedious, it can solve another problem: for example, if a user enters a command to chat with himself, the chat_with value will be incorrect ).

Server_test.py

import threadingimport refrom socket import *HOST='127.0.0.1'PORT=21568BUFSIZ=1024ADDR=(HOST,PORT)tcpSerSock = socket(AF_INET,SOCK_STREAM)tcpSerSock.bind(ADDR)tcpSerSock.listen(5)def sendMsg(socket, username):    while True:        data = socket.recv(BUFSIZ)        if data == 'quit':            if chatwith.has_key(username):                chatwith[username].send((username + ':' + data))                chatwith[username].send('cmdcancel')                del chatwith[username]                del account[username]            socket.send(data)            socket.close()            print '%s logout' % username            break        elif data == 'cmdcancel':            del chatwith[username]        elif re.match(r'to:.+',data) is not None:            chat_with = data[3:]            if chat_with == username:                socket.send('Can`t chat with yourself')            elif chatwith.has_key(chat_with):                socket.send('the user %s is bussy' % chat_with)            elif account.has_key(chat_with):                chatwith[username]=account[chat_with]                chatwith[chat_with]=socket            else:                socket.send('the user %s is not exist' % chat_with)        else:            if chatwith.has_key(username):                chatwith[username].send(data)            else:                socket.send('you want to chat with-> to:username ')account = {}chatwith = {}while True:    print 'waiting for connection...'    tcpCliSock,addr=tcpSerSock.accept()    print '...connected from:', addr    username = tcpCliSock.recv(BUFSIZ)    print 'username:%s' % username    if account.has_key(username):        tcpCliSock.send("Reuse")        tcpCliSock.close()    else:        tcpCliSock.send("Welcome!")        account[username]=tcpCliSock        recev_msg = threading.Thread(target=sendMsg, args=(tcpCliSock,username))        recev_msg.start()tcpSerSock.close()

Client_test.py

#coding=utf-8from socket import *from time import ctimeimport threadingHOST='localhost'PORT=21568BUFSIZ=1024ADDR=(HOST,PORT)def sendMsg(sock):    while True:        data = raw_input('>')        sock.send(data)        if data == 'quit':            breakdef recvMsg(sock):    while True:        data = tcpCliSock.recv(BUFSIZ)        if data == 'cmdcancel':            sock.send('cmdcancel')            continue        elif data == 'quit':            sock.close()            print data            break        print '[%s] %s' % (ctime(),data)tcpCliSock=socket(AF_INET,SOCK_STREAM)tcpCliSock.connect(ADDR)username = raw_input('please input your name:')tcpCliSock.send(username)data = tcpCliSock.recv(BUFSIZ)if data == 'Reuse':    print 'The username has been used!'else:    send_msg = threading.Thread(target=sendMsg, args=(tcpCliSock,))    recv_msg = threading.Thread(target=recvMsg, args=(tcpCliSock,))    send_msg.start()    recv_msg.start()    send_msg.join()tcpCliSock.close()

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