#21762 closed Bug (needsinfo)

django.core.files.Storage#save does not respect settings.FILE_CHARSET

Reported by: anonymous Owned by: nobody
Component: File uploads/storage Version: 1.6
Severity: Normal Keywords:
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: yes UI/UX: no


Assuming that chunk is not an instance of bytes, this line:


will create a text-mode file without setting the encoding to settings.FILE_CHARSET. As a result, my CI builds were failing with UnicodeEncodeErrors on invocation of manage.py collectstatic (which invoked django-pipeline, which uses this code).

Change History (3)

comment:1 Changed 19 months ago by anonymous

  • Needs documentation unset
  • Needs tests unset
  • Patch needs improvement unset

I suggest changing the code under if _file is None: to the following:

if isinstance(chunk, bytes):
    _file = os.fdopen(fd, 'wb')
    _file = os.fdopen(fd, 'wt', encoding=settings.FILE_CHARSET)

comment:2 Changed 19 months ago by anonymous

Apparently the meaning of os.fdopen has changed in Python 3, which is what I'm using. The encoding kwarg is probably not accepted in Python 2, so maybe change it to use plain open if it needs to open in text mode.

comment:3 Changed 19 months ago by claudep

  • Resolution set to needsinfo
  • Status changed from new to closed

settings.FILE_CHARSET is documented and used in Django for reading files, not for writing files. If you get a UnicodeEncodeError, I guess you have an issue with your default encoding. On Python 3 (which is the target here), I think that the default encoding is generally always UTF-8. Can you check that (locale.getpreferredencoding)?

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