python3实现TCP协议的简单服务器和客户端案例(分享)

from socket import *host = '192.168.48.128'port = 13141addr = (host,port)bufsize=1024tcpClient = socket(AF_INET,SOCK_STREAM) # 这里的参数和UDP不一样。tcpClient.connect(addr) #由于tcp三次握手机制，需要先连接while True:  data = input('>>> ').encode(encoding="utf-8")  if not data:    break  # 数据收发和UDP基本一致  tcpClient.send(data)   data = tcpClient.recv(bufsize).decode(encoding="utf-8")   print(data)tcpClient.close()

from socket import *from time import ctimeimport os host = ''port = 13140bufsize = 1024addr = (host,port)tcpServer = socket(AF_INET,SOCK_STREAM)tcpServer.bind(addr)tcpServer.listen(5) #这里设置监听数为5(默认值),有点类似多线程。while True:  print('Waiting for connection...')  tcpClient,addr = tcpServer.accept() #拿到5个中一个监听的tcp对象和地址  print('[+]...connected from:',addr)  while True:    cmd = tcpClient.recv(bufsize).decode(encoding="utf-8")     print('  [-]cmd:',cmd)    if not cmd:      break    ###这里在cmd中执行来自客户端的命令，并且将结果返回###    cmd = os.popen(cmd) ###os.popen(cmd)对象是file对象子类，所以可以file的方法    cmdResult = cmd.read()    cmdStatus = cmd.close()    #################################################    data = cmdResult if (not cmdStatus) else "ERROR COMMAND"    tcpClient.send(data.encode(encoding="utf-8"))  tcpClient.close() #  print(addr,'End')tcpServer.close() #两次关闭，第一次是tcp对象，第二次是tcp服务器