Python套接字编程

服务器端：

#!/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()

这里：sock.listen(1)表示此套接字最多允许多少个客户连接到服务器。

它的值至少为1。收到连接请求后，这些请求需要排队，如果队列满，就拒绝请求。

客户端：

# /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"
    message = ['1',2,"Hi"]
    print 'Sending "%s".' % message
    sock.sendall(str(message))
    print 'Closing socket.'
    sock.close()
if __name__ == "__main__":
    print check_tcp_status("127.0.0.1", 12345)

发送消息客户端 && 接收消息服务器

服务器

#!/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:
    connection, client_address = sock.accept()
    try:
        data = connection.recv(1024).strip("\n")
        print data
    finally:
        connection.close()

客户端

# /usr/bin/python
# -*- coding: utf-8 -*-
import socket
import sys

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)
    while True:
        message = sys.stdin.readline()
        if message == "S":
            break
        print message.strip("\n")
        sock.sendall(str(message))
    sock.close()
if __name__ == "__main__":
    print check_tcp_status("127.0.0.1", 12345)