如何修复服务器的输出，使其正确显示来自客户端的消息？

# 示例：使用Python的socket库进行TCP通信
import socket

# 服务器端
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(('localhost', 12345))
server_socket.listen(5)

while True:
    client_socket, addr = server_socket.accept()
    data = client_socket.recv(1024)
    print(f"Received message: {data.decode('utf-8')}")
    client_socket.close()

# 客户端
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(('localhost', 12345))
client_socket.sendall("Hello, Server!".encode('utf-8'))
client_socket.close()

# 示例：使用JSON格式传输数据
import json

# 发送端
data = {"message": "Hello, Server!"}
json_data = json.dumps(data).encode('utf-8')
client_socket.sendall(json_data)

# 接收端
received_data = client_socket.recv(1024)
decoded_data = json.loads(received_data.decode('utf-8'))
print(f"Received message: {decoded_data['message']}")