python epoll聊天室程序

#!/usr/bin/python  
# -*- coding:utf-8 -*- 
 
import socket, select 
 
for res in socket.getaddrinfo('0.0.0.0', 1025, socket.AF_INET, socket.SOCK_STREAM): 
    fa, socktype, proto, canonname, sa = res 
 
SockServer = socket.socket(fa, socktype, proto)  
SockServer.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
SockServer.bind(sa) 
SockServer.listen(5) 
 
epoll = select.epoll() 
epoll.register(SockServer.fileno(), select.EPOLLIN) 
 
try: 
    conns={}; addrs={} 
 
    while True: 
        for fileno, event in epoll.poll(1): 
            if fileno == SockServer.fileno(): 
                conn, addr = SockServer.accept() 
 
                epoll.register(conn.fileno(), select.EPOLLIN) 
                conns[conn.fileno()] = conn 
                addrs[conn.fileno()] = addr 
 
                conn.send("--- Welcome to server. Type EXIT to quit. ---\n") 
                print '[server]: accept connection from %s<%s>' % addr 
 
            elif event & select.EPOLLIN: 
                message = conns[fileno].recv(1024) 
                print "%s<%s> say: " % (addrs[fileno][0], addrs[fileno][1]) + message.strip() 
 
                if b'EXIT' in message: 
                    epoll.modify(fileno, select.EPOLLOUT) 
 
                for key in conns.keys(): 
                    if key != fileno: 
                        conns[key].send('%s<%s> say: %s' % (addrs[key][0], addrs[key][1], message)) 
 
            elif event & select.EPOLLOUT: 
                epoll.modify(fileno, 0) 
                conns[fileno].shutdown(socket.SHUT_RDWR) 
 
            elif event & select.EPOLLHUP: 
                epoll.unregister(fileno) 
                conns[fileno].close() 
                print '[server]: %s<%s> quit.' % addrs[fileno]  
 
                del conns[fileno] 
                del addrs[fileno] 
 
finally: 
    epoll.unregister(SockServer.fileno()) 
    epoll.close() 
    SockServer.close()