import socket
import threading

SERVER_IP = '0.0.0.0'
SERVER_PORT = "任意のポート番号"  # Server port number

def handle_client(client_socket):
    try:
        data_received = client_socket.recv(1024)
        print(f"Received: {data_received.decode()}")  # Log what was received
        while data_received:
            client_socket.send(data_received)  # Send the data back to the client
            data_received = client_socket.recv(1024)
    except OSError as e: 
        print(f"Error handling client: {e}")
    finally:
        client_socket.close()

def main():
    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server.bind((SERVER_IP, SERVER_PORT))
    server.listen(5)
    print(f"[*] Listening on {SERVER_IP}:{SERVER_PORT}")

    while True:
        client, addr = server.accept()
        print(f"[*] Accepted connection from: {addr[0]}:{addr[1]}")
        client_handler = threading.Thread(target=handle_client, args=(client,))
        client_handler.start()

if __name__ == "__main__":
    main()