Python socket实现多对多全双

服务器：#server.py

#!/usr/bin/env python
#-*-coding:utf-8-*-
import sys
import struct#将字符串打包为二进制流进行网络传输
import select#
import signal#用于捕获中断信号
import cPickle#将Python对象进行序列化:dumps将python对象序列化保存为字符串,loads与之相反
from Socket import *
HOST = ''
def send(channel,*args):#发送数据
    buffer = cPickle.dumps(args)
    value = htonl(len(buffer))
    size = struct.pack("L",value)
    channel.send(size)
    channel.send(buffer)
def receive(channel):#接收数据
    size = struct.calcsize("L")
    size = channel.recv(size)
    try:
        size = ntohl(struct.unpack("L",size)[0])#socket.ntohl(参考：Http://blog.csdn.net/tatun/article/details/7194973)
    except struct.error,e:
        return ''
    buf = ''
    while len(buf) < size:
        buf += channel.recv(size-len(buf))
    return cPickle.loads(buf)[0]#恢复python对象

class ChatServer(object):
    def __init__(self,PORT,backlog = 5):
        self.clients = 0
        self.clientmap = {}
        self.outputs = [] #Client会话列表
        self.server = socket(AF_INET, SOCK_STREAM)
        self.server.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)#重用套接字地址
        self.server.bind((HOST,PORT))
        self.server.listen(backlog)
        signal.signal(signal.SIGINT,self.signalhandler)#使用signal模块捕获中断操作 SIGINT中断进程(ctrl+c)， SIGTERM 终止进程，SIGKILL杀死进程，SIGALRM 闹钟信号

    def signalhandler(self,signum,frame):#中断处理方法
        print "Shutting down server ..."
        for output in self.outputs:
            output.close()
        self.server.close()

    def get_client_name(self,client):
        info = self.clientmap[client]
        host,port,name = info[0][0],info[0][1],info[1]
        return ':'.join((('@'.join((name,host))),str(port)))

    def run(self):
        inputs = [self.server]
        print 'Waiting for connect...'
        while True:
            try:
                readable,writeable,execption = select.select(inputs,self.outputs,[])
            except select.error,e:
                break
            for sock in readable:
                if sock == self.server:#服务器端接收
                    client,address = self.server.accept()
                    print "Chat server: connected from",address
                    self.clients += 1
                    cname = receive(client)
                    send(client,str(address[0]))
                    inputs.append(client)
                    self.clientmap[client] = (address,cname)
                    msg = "(Connected : New Client(%d) from %s)\n"%(self.clients,self.get_client_name(client))
                    message = "At present, only one of you is in the chat room!"
                    if self.clients == 1:
                        send(client,message)
                    for output in self.outputs:
                        send(output,msg)
                    self.outputs.append(client)#将开始回话的client加入Client回话列表

                #elif sock == sys.stdin:
                    #break
                else:
                    try:
                        data = receive(sock)
                        if data:
                            msg = '[' + self.get_client_name(sock)+ '] >> ' + data
                            for output in self.outputs:
                                if output!=sock:
                                    send(output,msg)
                        else:
                            self.clients-=1
                            sock.close()
                            inputs.remove(sock)
                            self.outputs.remove(sock)
                            msg = '(Now hung up: Client from %s)'%self.get_client_name(sock)
                            message = "At present, only one of you is in the chat room!"
                            for output in self.outputs:
                                send(output,msg)
                            if self.clients == 1:
                                send(self.outputs[0],message)
                    except error,e:
                        inputs.remove(sock)
                        self.outputs.remove(sock)
        self.server.close()
if __name__ == "__main__":
        server = ChatServer(6004)
        server.run()

客户端：#client.py

#!/usr/bin/env python
#-*-coding:utf-8-*-
from server import send,receive
from socket import *
import sys
import select
import cPickle
import struct
import signal

class ChatClient(object):
    def __init__(self,name):
        self.name = name
        self.connected = False
        self.host = 'localhost'
        self.port = 6004
        try:
            self.sock = socket(AF_INET,SOCK_STREAM)
            self.sock.connect((self.host,self.port))
            self.connected = True
            send(self.sock,self.name)
            data= receive(self.sock)
            addr = data
        except error,e:#socket.serro
            print 'Failed to connect to chat server'
            sys.exit(1)
    def run(self):
        while True:
            try:
                readable,writeable,exception = select.select([0,self.sock],[],[])
                for sock in readable:
                    if sock == 0:
                        data = sys.stdin.readline().strip()
                        if data:
                            send(self.sock,data)
                    else:
                        data=receive(self.sock)
                        if not data:
                            print 'Client shutting down.'
                            self.connected = False
                            break
                        else:
                            sys.stdout.write(data+'\n')
                            sys.stdout.flush()
            except KeyboardInterrupt:
                print 'Client interrupted'
                self.sock.close()
                break
if __name__ == "__main__":
    name = raw_input("Please input login name > ")
    client=ChatClient(name)
    client.run()