Python服务器和Powershell客户端消息问题

Question

我有小型python tcp服务器和小型powershell tcp客户端。当我发送使用utf8编码的字符串时，其解码结果就像两个空格一样。我尝试了很多在网上找到的解决方案，但没有成功。我在哪里做错了？

Python服务器代码：

import socket

host = '192.168.0.11'
port = 12345

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind((host, port))
sock.listen(1)

conn, address = sock.accept()
print('New client connected:', address)

while True:
    data = conn.recv(1024)
    print("Message:", data.decode('utf-8'),".") 
    if not data:
        break
conn.close()

Powershell客户端脚本：

$addr = '192.168.0.11'
$port = '12345'
$conn = New-Object System.Net.Sockets.TcpClient($addr, $port)
$conn = $conn.GetStream()

$writer = New-Object System.IO.StreamWriter($conn)
$writer.AutoFlush = $true


$message = "hello"
if ($conn.Connected) {
    $writer.WriteLine([system.text.encoding]::UTF8.GetBytes($message))
}

$writer.close()
$conn.close()