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