"""

The temp module provides a NamedTemporaryFile that can be re-opened on any

platform. Most platforms use the standard Python tempfile.TemporaryFile class,

but MS Windows users are given a custom class.

This is needed because in Windows NT, the default implementation of

NamedTemporaryFile uses the O_TEMPORARY flag, and thus cannot be reopened [1].

1: http://mail.python.org/pipermail/python-list/2005-December/359474.html

"""

import os

import tempfile

from django.core.files.utils import FileProxyMixin

__all__ = ('NamedTemporaryFile', 'gettempdir',)

if os.name == 'nt':

    class TemporaryFile(FileProxyMixin):

        """

        Temporary file object constructor that works in Windows and supports

        reopening of the temporary file in windows.

        """

        def __init__(self, mode='w+b', bufsize=-1, suffix='', prefix='',

                dir=None):

            fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,

                                          dir=dir)

            self.name = name

            self.file = os.fdopen(fd, mode, bufsize)

            self.close_called = False

        # Because close can be called during shutdown

        # we need to cache os.unlink and access it

        # as self.unlink only

        unlink = os.unlink

        def close(self):

            if not self.close_called:

                self.close_called = True

                try:

                    self.file.close()

                except (OSError, IOError):

                    pass

                try:

                    self.unlink(self.name)

                except (OSError):

                    pass

        def __del__(self):

            self.close()

    NamedTemporaryFile = TemporaryFile

else:

    NamedTemporaryFile = tempfile.NamedTemporaryFile

gettempdir = tempfile.gettempdir