TCP server / client 簡易版本

tcpclient.py

import socket
import sys

HOST, PORT = "localhost", 9999
data = " ".join(sys.argv[1:])

# Create a socket (SOCK_STREAM means a TCP socket)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
  # Connect to server and send data
  sock.connect((HOST, PORT))
  sock.sendall(bytes(data + "\n", "utf-8"))

  # Receive data from the server and shut down
  received = str(sock.recv(1024), "utf-8")
finally:
  sock.close()

print("Sent:     {}".format(data))
print("Received: {}".format(received))

tcpserver.py

import socketserver

class MyTCPHandler(socketserver.BaseRequestHandler):
  """
  The RequestHandler 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
  server = socketserver.TCPServer((HOST, PORT), MyTCPHandler)

  # Activate the server; this will keep running until you
  # interrupt the program with Ctrl-C
  server.serve_forever()

good