闲来无事，用python写个客户端与服务器端应答的程序，主要原理就是客户端通过tcp协议与服务器端通信，客户端给服务器端发送指令，服务器执行指令后把相应的结果返回给客户端，客户端打印结果，代码比较简单，不详细介绍。纯属娱乐。

1.服务器端代码，server_tcp.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

# #执行客户端发送过来的命令，并把执行结果返回给客户端
import socket, traceback, subprocess

host = ''
port = 51888

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

s.bind((host, port))
s.listen(1)

while 1:
    try:
        client_socket, client_addr = s.accept()
    except Exception, e:
        traceback.print_exc()
        continue

    try:
        print 'From host:', client_socket.getpeername()
        while 1:
            command = client_socket.recv(4096)
            if not len(command):
                break
            print client_socket.getpeername()[0] + ':' + str(command)

            # 执行客户端传递过来的命令
            handler = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)
            output = handler.stdout.readlines()
            if output is None:
                output = []

            for one_line in output:
                client_socket.sendall(one_line)
                client_socket.sendall("\n")

            client_socket.sendall("ok")


    except Exception, e:
        traceback.print_exc()

    try:
        client_socket.close()
    except Exception, e:
        traceback.print_exc()

2.客户端代码 client_tcp.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

# #给server端发送命令
import socket, sys, traceback

host = '127.0.0.1'
port = 51888

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
    s.connect((host, port))
except Exception, e:
    msg = traceback.format_exc()
    print '连接错误:', msg

input_command = raw_input('Input command:')
s.send(input_command)

# 利用shutdown()函数使socket双向数据传输变为单向数据传输
# 该参数表示了如何关闭socket。具体为：0表示禁止将来读；1表示禁止将来写；2表示禁止将来读和写
s.shutdown(1)
print '发送完成.'
print '收到内容：\n'
while 1:
    buff = s.recv(4096)
    if not len(buff):
        break

    sys.stdout.write(buff)

3.启动server_tcp.py脚本，开始监听本机51888端口；接着启动client_tcp.py.

(1)客户端内容：

/usr/bin/python2.7 /home/wuguowei/PycharmProjects/xplan_script/test_process/client_tcp.py
Input command:ls -l
发送完成.
收到内容：

总用量 20

-rw-r--r-- 1 root root  744  2月 10 14:44 client_tcp.py

-rw-r--r-- 1 root root  877  2月 10 14:18 my_sub_process.py

-rw-r--r-- 1 root root 1290  2月 10 14:45 server_tcp.py

-rw-r--r-- 1 root root  493  2月 10 10:43 tcpclient.py

-rw-r--r-- 1 root root 1168  2月 10 11:51 tcpserver.py

ok
Process finished with exit code 0

（2）服务器端信息

/usr/bin/python2.7 /home/wuguowei/PycharmProjects/xplan_script/test_process/server_tcp.py
From host: ('127.0.0.1', 46993)
127.0.0.1:ls -l