在python中编写socket服务端模块（一）：使用select

import socket  
import select  
import Queue  
  
server=('10.0.2.15',21345)  
#SOCK_STREAM（流套接字）、SOCK_DGRAM（数据报文套接字）、AF_INET（IPv4）      
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)  
#阻塞与端口复用前后顺序可换  
sock.setblocking(False)  
#SOL_SOCKET（套接字描述符）、SO_REUSEADDR（端口复用）  
sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)  
sock.bind(server)  
sock.listen(5)  
  
rlists=[sock]  
wlists=[]  
msg_que={}  
  
timeout=10  
  
while True:   
    rs,ws,es=select.select(rlists,wlists,rlists,timeout)  
  
    if not(rs or ws or es):  
        print 'timeout...'  
        continue  
      
    #读部分  
    for s in rs:  
        #看s是否是本机上用于监听的socket，是则接受连接，不是则接收数据  
        if s is sock:  
            conn,addr=s.accept()  
            #conn、addr分别是所接收到的socket对象和对方端口  
            print 'connect by',addr  
            conn.setblocking(False)  
            rlists.append(conn)  
            #使用字典将conn与一个队列相对应  
            msg_que[conn]=Queue.Queue()              
        else:  
            data =s.recv(1024)  
            if data:  
                print data  
                msg_que[s].put(data)  
                if s not in wlists:  
                    wlists.append(s)  
            else:  
                if s in wlists:  
                    wlists.remove(s)  
                rlists.remove(s)  
                s.close  
                del msg_que[s]  
    #写部分             
    for  s in ws:  
        try:  
            #get_nowait()跟get(0)一样  
            msg=msg_que[s].get_nowait()  
        except Queue.Empty:  
            print 'msg empty'  
            wlists.remove(s)  
        else:  
            s.send(msg)  
    #异常部分      
    for s in es:  
        print 'except',s.getpeername()  
        if s in rlists:  
            rlists.remove(s)  
        if s in wlists:  
            wlists.remove(s)          
        s.close  
        del msg_que[s]      

# -*- coding: utf-8 -*-    
#使用utf-8在命令行窗口里才能运行  
import socket  
import time  
  
#getpeername()获得socket对方的地址  
  
server=('10.0.2.15',21345)  
  
msg=['hello','welcome','xiaoming','zhangsan','list','liuliu']  
  
socks=[]  
for i in range(10):  
    sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)  
    socks.append(sock)  
      
for s in socks:  
    s.connect(server)  
  
counter =0  
for m in msg:  
    for s in socks:  
        s.send('%d send %s' %(counter,m))  
        counter=counter+1  
    for s in socks:  
        data =s.recv(1024)  
        print '%s echo %s' %(s.getpeername(),data)  
        if not data:  
            s.close()  
    time.sleep(2)