Release 1.1.2 not working on uWSGI and gunicorn

[morenosan]

Hi!

Thank you for sharing this package. It's really useful.

I've found a problem upgrading to the 1.1.2 release. Using runserver works great, but at least on uWSGI and gunicorn, it fails with the following error just after receiving the first chunk.

[2017-06-22 10:03:41,866] ERROR django.request-132 Internal Server Error: /api/chunked_upload/
Traceback (most recent call last):
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/django/core/handlers/exception.py", line 42, in inner
    response = get_response(request)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/django/views/generic/base.py", line 68, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/django/views/generic/base.py", line 88, in dispatch
    return handler(request, *args, **kwargs)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/chunked_upload/views.py", line 93, in post
    return self._post(request, *args, **kwargs)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/chunked_upload/views.py", line 214, in _post
    chunked_upload.append_chunk(chunk, chunk_size=chunk_size, save=False)
  File "/home/juan/.virtualenvs/demo/lib/python3.5/site-packages/chunked_upload/models.py", line 69, in append_chunk
    self.file.write(chunk.read())
io.UnsupportedOperation: write

Same code with release 1.1.1 works as expected I've tested it with uWSGI-2.0.14 and gunicorn-19.7.1

[Flinkas]

Did you check the read/write permissions?

[morenosan]

Yes. In the following code:

    def append_chunk(self, chunk, chunk_size=None, save=True):
        self.file.close()
        self.file.open(mode='ab')  # mode = append+binary

First line closes the file. But the second line opens the file in read mode, not in 'ab' mode, as requested.

[kansch]

Same issue, with 1.1.2 and using runserver (Django 1.9.7):

 File "<path_to_virtualenv>/lib/python3.5/site-packages/chunked_upload/models.py", line 69, in append_chunk
    self.file.write(chunk.read())
io.UnsupportedOperation: write

I juste tested the 1.1.1 and it works.

[kansch]

Version 1.1.2 works with Django 1.11.0. Apparently it was due to this bug:

https://code.djangoproject.com/ticket/13809

Fixed by:

https://github.com/django/django/commit/ac1975b18b5a33234284bec86e5a5bb44a4af976

[morenosan]

Thanks @kansch!

The problem was the Django version. Updating from 1.10 to 1.11 fixed the problem.