Python网络编程基础笔记-poll实现非阻塞socket

# -*- coding: cp936 -*-

"""

非阻塞socket的使用(此程序在ubuntu linux上测试,Windows没有select.poll)

监控socket的三个状态:IN/ERR/HUP

程序以5000ms的时间长度为间隔,如果有客户端的请求,接收连接并进行显示;如果没有的话,

每隔5000ms显示一次"no data coming"

"""

import socket,select

host = ""

port = 50000

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

s.bind((host,port))

s.listen(5)

# 创建poll对象,仅用于unix-like系统

p = select.poll()

p.register(s.fileno(),select.POLLIN|select.POLLERR|select.POLLHUP)

while 1:

    results = p.poll(5000)

    # 如果有结果返回,进行处理,否则不予理会

    if len(results) != 0:

        if results[0][1] == select.POLLIN:

            clientsock,clientaddr = s.accept()

            buf = clientsock.recv(8196)

            if len(buf) != 0:

                print (buf)

            clientsock.close()

    print "no data coming"

# -*- coding: cp936 -*-

"""

向服务器端发送字符串

"""

import socket,select

host = "localhost"

port = 50000

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

s.connect((host,port))

s.send("coming from poll client")

s.close()