多进程socket模型

from socket import *

import time 

import os

import sys

def client_deal(client,client_info):

    while True:

        msg = client.recv(1024)

        if msg == ‘‘:

            client.close()

            break

        print ‘recv=‘,msg, ‘from:‘,client_info

        client.send(‘echo‘+msg)

        if msg ==‘q‘ or msg == ‘Q‘:

                        client.close()

                        break

def client_process(client,client_info):

    pid = os.fork()

    if pid == 0:

        ppid = os.fork()

        if ppid == 0:

            client_deal(client,client_info)

        else:

            print ‘pid=‘,os.getpid()

            sys.exit()

            print "child exit"

    else:

        client.close()

        os.wait()

        print ‘Main process wait child exit‘

if __name__ == ‘__main__‘:

    tcp_server = socket(AF_INET,SOCK_STREAM)

    tcp_server.bind((‘localhost‘,5001))

    tcp_server.listen(5)

    while True:

        print ‘pid=‘,os.getpid(),"wait client"

        client,client_info = tcp_server.accept()

        print client_info

        client_process(client,client_info)

    tcp_server.close()