python简易局域网聊天工具全部代码

在Python中创建一个简易的局域网聊天工具，通常涉及到使用socket编程和多线程技术。这里是一个简化版本的示例代码，展示了如何使用TCP套接字建立一个基本的聊天服务器和客户端：

# server.py (服务器端)
import socket
from threading import Thread

class Server:
    def __init__(self, host='localhost', port=12345):
        self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server.bind((host, port))
        self.server.listen()
        print(f"Server started on {host}:{port}")

    def handle_client(self, client_socket):
        request = client_socket.recv(1024).decode('utf-8')
        print(f"Received message from client: {request}")
        client_socket.send("You said: " + request.encode('utf-8'))
        client_socket.close()

    def start_server(self):
        while True:
            client, addr = self.server.accept()
            print(f"Accepted connection from {addr}:{addr}")
            client_handler = Thread(target=self.handle_client, args=(client,))
            client_handler.start()

if __name__ == "__main__":
    server = Server()
    server.start_server()

# client.py (客户端)
import socket

def send_message(host='localhost', port=12345, message="Hello!"):
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect((host, port))
    client.send(message.encode('utf-8'))
    response = client.recv(1024).decode('utf-8')
    print(f"Response received: {response}")
    client.close()

if __name__ == "__main__":
    send_message("localhost", 12345, "Your message goes here!")

**相关问题--:**
1. 如何在实际环境中运行这个服务器和客户端？
2. 如果想要支持多个客户端同时连接，还需要做哪些修改？
3. 这个示例是否安全？如果需要增强安全性，应该怎么做？