# coding: utf-8
import socketserver


class MyTCPHandler(socketserver.BaseRequestHandler):
 """
 The request handler class for our server.
 It is instantiated once per connection to the server, and must
 override the handle() method to implement communication to the
 client.
 """

 def handle(self):
  # self.request is the TCP socket connected to the client
  self.data = self.request.recv(1024).strip()
  print("{} wrote:".format(self.client_address[0]))
  print(self.data)
  # just send back the same data, but upper-cased
  self.request.sendall(self.data.upper())


if __name__ == "__main__":
 HOST, PORT = "localhost", 9999

 # Create the server, binding to localhost on port 9999
 # 如果子类没有某个方法或是属性, 就回去父类中调用
 with socketserver.ThreadingTCPServer((HOST, PORT), MyTCPHandler) as server:
  # Activate the server; this will keep running until you
  # interrupt the program with Ctrl-C
  server.serve_forever()

# coding: utf-8
import socket


sk = socket.socket()
sk.connect(("127.0.0.1", 9999)) # 主动初始化与服务器端的连接
while True:
 send_data = input("输入发送内容:")
 sk.sendall(bytes(send_data, encoding="utf8"))
 if send_data == "byebye":
  break
 accept_data = str(sk.recv(1024), encoding="utf8")
 print("".join(("接收内容：", accept_data)))
sk.close()

class ThreadingTCPServer(ThreadingMixIn, TCPServer): pass

with socketserver.ThreadingTCPServer((HOST, PORT), MyTCPHandler) as server:
  # Activate the server; this will keep running until you
  # interrupt the program with Ctrl-C
  server.serve_forever()