Django 1.11.7 - Django 压缩器 - 参数 5：<class 'TypeError'>：预期 LP_OVERLAPPED 实例而不是指向 OVERLAPPED 的指针

Question

我正在尝试在我的 Windows 10 机器上启动并运行现有的 Django 1.11.7 (Python 3.5) 项目。设置环境后，我现在可以在运行应用程序后看到主页，但我访问的任何内部页面都会收到以下错误：

argument 5: <class 'TypeError'>: expected LP_OVERLAPPED instance instead of pointer to OVERLAPPED

我已经追踪到从 compress.py （Django 压缩器）对一些压缩 CSS 文件的调用，到 django.core 内部的一些 win32 文件锁定代码，特别是这一行： https://github.com/django/django /blob/master/django/core/files/locks.py#L86（在下面的片段中解锁FileEx）。

class OVERLAPPED(Structure):
    _anonymous_ = ['_offset_union']
    _fields_ = [
        ('Internal', ULONG_PTR),
        ('InternalHigh', ULONG_PTR),
        ('_offset_union', _OFFSET_UNION),
        ('hEvent', HANDLE)]

LPOVERLAPPED = POINTER(OVERLAPPED)
....
def lock(f, flags):
    hfile = msvcrt.get_osfhandle(_fd(f))
    overlapped = OVERLAPPED()
    ret = LockFileEx(hfile, flags, 0, 0, 0xFFFF0000, byref(overlapped))
    return bool(ret)

def unlock(f):
    hfile = msvcrt.get_osfhandle(_fd(f))
    overlapped = OVERLAPPED()
    ret = UnlockFileEx(hfile, 0, 0, 0xFFFF0000, byref(overlapped))
    return bool(ret)

奇怪的是，在主页上调用LockFileEx和UnlockFileEx方法都没有错误。在成功和失败的通话中对当地人进行了检查，但没有发现任何结果。

堆栈跟踪以防有帮助（更高的堆栈已编辑）：

  File "C:\x\env\lib\site-packages\compressor\templatetags\compress.py", line 127, in render
    return self.render_compressed(context, self.kind, self.mode, forced=forced)
  File "C:\x\env\lib\site-packages\compressor\templatetags\compress.py", line 103, in render_compressed
    rendered_output = compressor.output(mode, forced=forced)
  File "C:\x\env\lib\site-packages\compressor\css.py", line 49, in output
    ret.append(subnode.output(*args, **kwargs))
  File "C:\x\env\lib\site-packages\compressor\css.py", line 51, in output
    return super(CssCompressor, self).output(*args, **kwargs)
  File "C:\x\env\lib\site-packages\compressor\base.py", line 292, in output
    output = '\n'.join(self.filter_input(forced))
  File "C:\x\env\lib\site-packages\compressor\base.py", line 232, in filter_input
    for hunk in self.hunks(forced):
  File "C:\x\env\lib\site-packages\compressor\base.py", line 215, in hunks
    basename=basename)
  File "C:\x\env\lib\site-packages\compressor\base.py", line 307, in handle_output
    return output_func(mode, content, forced, basename)
  File "C:\x\env\lib\site-packages\compressor\base.py", line 319, in output_file
    self.storage.save(new_filepath, ContentFile(content.encode(self.charset)))
  File "C:\x\env\lib\site-packages\django\core\files\storage.py", line 54, in save
    return self._save(name, content)
  File "C:\x\env\lib\site-packages\django\core\files\storage.py", line 357, in _save
    locks.unlock(fd)
  File "C:\x\env\lib\site-packages\django\core\files\locks.py", line 86, in unlock
    ret = UnlockFileEx(hfile, 0, 0, 0xFFFF0000, byref(overlapped))

看来用于锁定/解锁的文件是静态 CSS 文件。JS 和 LESS 都会抛出上述异常。看来该项目正在使用 yuglify 作为 CSS 和 JS 过滤器（如果有帮助的话）。

Answer 1

就我而言，这是由于与 youtube-dl 包发生冲突，该包具有与 django-compressor 包类似的名称、变量和方法。我能够通过“破解”两个实例中各种令牌的名称来确认这一点，从而导致错误argument 5: <class 'TypeError'>: expected LP_OVERLAPPED2 instance instead of pointer to OVERLAPPED3

我现在已从我的环境中删除了 youtube-dl 软件包，作为在本地开发环境中运行该程序的临时解决方案。