pythonでsocketプログラミングをやってみる

import socket

target_host = "localhost"
target_port = 9999

# create socket object
# AF_INET -> ipv4を使います
# SOCK_STREAM -> tcpを使います
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

client.connect((target_host, target_port))

# strではなくbyteを渡す
client.send(b"Hello Server")

response = client.recv(4096)

print(response.decode())

client.close()

import socketserver


class MyTCPHandler(socketserver.BaseRequestHandler):
    """
    socket server request handler
    """

    def setup(self):
        print("request Started")

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

    def finish(self):
        print("request finished")

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

    server = socketserver.TCPServer((HOST, PORT), MyTCPHandler)

    server.serve_forever()