import socket

# 创建socket
s = socket.socket()

# 绑定IP和端口
# host = socket.gethostname()
host = "127.0.0.1"
port = 12345
s.bind((host, port))

# 设置最大连接数
s.listen(5)

print('Waiting for connection...')

# 接受客户端的连接
while True:
    conn, addr = s.accept()
    print('Got connection from', addr)

    # 向客户端发送消息
    conn.send('Welcome to the chat server!'.encode())
    while True:
        # 接收客户端消息
        data = conn.recv(1024).decode()
        if not data:
            break
        print('Received from client: ', data)
        # 发送响应消息
        conn.send(data.encode())

# 关闭连接
conn.close()