Home Backend Development Python Tutorial Python采用socket模拟TCP通讯的实现方法

Python采用socket模拟TCP通讯的实现方法

Jun 06, 2016 am 11:20 AM
python socket tcp simulation communication

本文实例讲述了Python采用socket模拟TCP通讯的实现方法。分享给大家供大家参考。具体实现方法如下:

对于TCP server端的创建而言,分为如下几个步骤:

创建socket对象(socket):其中两个参数分别为Address Family(如AF_INET为IPV4,AF_INET6为IPV6,AF_UNIX为UNIX域协议族)、socket类型(如SOCK_STREAM为TCP,SOCK_DGRAM为UDP)。

绑定服务器地址(bind):参数为服务器地址二元组。
监听(listen):参数为允许的连接数。
等待请求(accept)。
接收数据(recv、recvfrom、recvfrom_into、recv_into)、发送数据(send、sendall、sendto)。
关闭连接(close)。

示例代码如下:

代码如下:

Python socket: TCP server
Python#! /usr/bin/python
# -*- coding: utf-8 -*-
import socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_address = ('127.0.0.1', 12345)
print "Starting up on %s:%s" % server_address
sock.bind(server_address)
sock.listen(1)
while True:
    print "Waiting for a connection"
    connection, client_address = sock.accept()
    try:
        print "Connection from", client_address
        data = connection.recv(1024)
        print "Receive '%s'" % data
    finally:
        connection.close()


其中,服务器地址二元组中,第一个元素为服务器IP(留空为在任意IP监听),第二个元素为服务器端口号。

而对于TCP client而言,通常包括如下几个步骤:

创建socket对象(socket):同server端。
连接服务器(connect):参数为服务器地址二元组。
发送和接收数据:同server端。
关闭连接:同server端。

示例代码如下:

代码如下:

Python socket: TCP client
Python# /usr/bin/python
# -*- coding: utf-8 -*-
import socket
def check_tcp_status(ip, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_address = (ip, port)
    print 'Connecting to %s:%s.' % server_address
    sock.connect(server_address)
    message = "I'm TCP client"
    print 'Sending "%s".' % message
    sock.sendall(message)
    print 'Closing socket.'
    sock.close()

if __name__ == "__main__":
    print check_tcp_status("127.0.0.1", 12345)

希望本文所述对大家的Python程序设计有所帮助。

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