Django-1.2.1/django/core/files/temp.py

   1 """
   2 The temp module provides a NamedTemporaryFile that can be re-opened on any
   3 platform. Most platforms use the standard Python tempfile.TemporaryFile class,
   4 but MS Windows users are given a custom class.
   5
   6 This is needed because in Windows NT, the default implementation of
   7 NamedTemporaryFile uses the O_TEMPORARY flag, and thus cannot be reopened [1].
   8
   9 1: http://mail.python.org/pipermail/python-list/2005-December/359474.html
  10 """
  11
  12 import os
  13 import tempfile
  14 from django.core.files.utils import FileProxyMixin
  15
  16 __all__ = ('NamedTemporaryFile', 'gettempdir',)
  17
  18 if os.name == 'nt':
  19     class TemporaryFile(FileProxyMixin):
  20         """
  21         Temporary file object constructor that works in Windows and supports
  22         reopening of the temporary file in windows.
  23         """
  24         def __init__(self, mode='w+b', bufsize=-1, suffix='', prefix='',
  25                 dir=None):
  26             fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,
  27                                           dir=dir)
  28             self.name = name
  29             self.file = os.fdopen(fd, mode, bufsize)
  30             self.close_called = False
  31
  32         # Because close can be called during shutdown
  33         # we need to cache os.unlink and access it
  34         # as self.unlink only
  35         unlink = os.unlink
  36
  37         def close(self):
  38             if not self.close_called:
  39                 self.close_called = True
  40                 try:
  41                     self.file.close()
  42                 except (OSError, IOError):
  43                     pass
  44                 try:
  45                     self.unlink(self.name)
  46                 except (OSError):
  47                     pass
  48
  49         def __del__(self):
  50             self.close()
  51
  52     NamedTemporaryFile = TemporaryFile
  53 else:
  54     NamedTemporaryFile = tempfile.NamedTemporaryFile
  55
  56 gettempdir = tempfile.gettempdir