python服务器主动拒绝连接

Question

我正在尝试根据位于 at this site 的示例代码创建一个简单的客户端-服务器 python 套接字程序。我所做的唯一实质性更改是更新 print() 函数。我感到很困惑 ConnectionRefusedError [WinError 10061]，无法弄清楚为什么会出现在这样一个简单的例子中：

客户代码：

import socket
import sys
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_address = ('127.0.0.1', 12345)
print('client connecting to %s port %s' % server_address)
sock.connect(server_address)
try:
    message = 'This is the message.  It will be repeated.'
    print('sending "%s"' % message)
    sock.sendall(message.encode('utf-8'))
    amount_received = 0
    amount_expected = len(message.encode('utf-8'))
    while amount_received < amount_expected:
        data = sock.recv(16)
        amount_received += len(data)
        print('received "%s"' % data)
finally:
    print('closing socket')
    sock.close()

服务器代码：

import socket
import sys
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_address = ('127.0.0.1', 12345)
print ('server starting up on %s port %s' % server_address)
sock.bind(server_address)
sock.listen(1)
while True:
    print('waiting for a connection')
    connection, client_address = sock.accept()
    try:
        print('connection from', client_address)
        while True:
            data = connection.recv(16)
            print('received "%s"' % data)
            if data:
                print('sending data back to the client')
                connection.sendall(data)
            else:
                print('no more data from', client_address)
                break
    finally:
        connection.close()

预期结果：

(SERVER should show)
starting up on localhost port 12345
waiting for a connection
connection from ('127.0.0.1', *someaddress*)
received "This is the mess"
sending data back to the client
received "age.  It will be"
sending data back to the client
received " repeated."
sending data back to the client
received ""
no more data from ('127.0.0.1', *someaddress*)
waiting for a connection
(CLIENT should show)
connecting to localhost port 12345
sending "This is the message.  It will be repeated."
received "This is the mess"
received "age.  It will be"
received " repeated."
closing socket

实际结果 来自 IDLE 运行 Python 3.6.1:

Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit 
(AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> 
================ RESTART: C:\Users\____\Desktop\test01.py ================
server starting up on 127.0.0.1 port 12345
waiting for a connection

================ RESTART: C:/Users/____/Desktop/test02.py ==============
client connecting to 127.0.0.1 port 12345
Traceback (most recent call last):
  File "C:/Users/_____/Desktop/test02.py", line 6, in <module>
    sock.connect(server_address)
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it

网络状态

我很好奇这个进程是否在监听所以提升了我的权限和运行 netstat -nab -- 它显示我的 python 服务器进程监听端口 12345:

TCP    127.0.0.1:12345        0.0.0.0:0              LISTENING
[pythonw.exe]

"the target machine actively refused it" 的错误消息对我来说毫无意义，因为服务器显然正在监听。任何人都可以提出这个简单示例中可能有什么问题吗？ Windows 10，Python 3.6.1 运行在两个独立的 IDLE windows 中。 我已经关闭了Windows防火墙的所有功能。

Answer 1

我发现了问题。我必须在启动 IDLE 实例时选择 "Run as Administrator" 来提升我在 IDLE 运行服务器实例上的特权 - 并且只有服务器 - 。 那还产生了结果 IDLE 输出 shell 与显示客户端输出的 shell 分开的效果。

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