python - Windows 上带有套接字包装器的 `OSError: [Errno 9] Bad file descriptor`

Question

我正在为套接字编写一个包装类，以便我可以将其用作类似文件的对象，用于通过管道传输到使用 创建的进程的 stdin 和 stdout >subprocess.Popen().

def do_task():
    global s #The socket
    class sockIO():
        def __init__(self, s):self.s=s
        def write(self, m): self.s.send(m)
        def read(self, n=None): return self.s.read() if n is None else self.s.read(n)
        def fileno(self): return self.s.fileno()
    #stdio=s.makefile('rw')
    stdio=sockIO(s)
    cmd = subprocess.Popen('cmd', shell=True,
                           stdout=stdio, stderr=stdio,
                           stdin=stdio)

我没有使用 socket.makefile() 因为它给出了 io.UnsupportedOperation: fileno 错误，但使用我目前的代码，我收到以下错误在 Windows 上(在 Linux 上工作正常):

Traceback (most recent call last):
  File "C:\Users\admin\Desktop\Projects\Python3\client.py", line 65, in <module>
    main()
  File "C:\Users\admin\Desktop\Projects\Python3\client.py", line 62, in main
    receive_commands2()
  File "C:\Users\admin\Desktop\Projects\Python3\client.py", line 57, in receive_commands2
    stdin=stdio)
  File "C:\Python3\lib\subprocess.py", line 914, in __init__
    errread, errwrite) = self._get_handles(stdin, stdout, stderr)
  File "C:\Python3\lib\subprocess.py", line 1127, in _get_handles
    p2cread = msvcrt.get_osfhandle(stdin.fileno())
OSError: [Errno 9] Bad file descriptor

Answer 1

根据有关 socket.fileno() 的 Python 文档，指出这在 Windows 中不起作用。引用自Python Documentation :

socket.fileno()

Return the socket’s file descriptor (a small integer). This is useful with select.select().

Under Windows the small integer returned by this method cannot be used where a file descriptor can be used (such as os.fdopen()). Unix does not have this limitation.

注意:

上面的代码可以在Linux和其他*nix系统上运行。