Chunked upload does'nt work with SDK version 3.0.0...

[c-rei]

When I used below code to chunked upload a big file, it is working with SDK version 2.14.0, but when I update
SDK version to 3.0.0, it does'nt work.

my code

chunked_uploader = some_folder.get_chunked_uploader(file_path)
uploaded_file = chunked_uploader.start()

error detail

Traceback (most recent call last):
File "", line 1, in
File "C:\virtual\box\lib\site-packages\boxsdk\util\chunked_uploader.py", line 43, in start
self._upload()
File "C:\virtual\box\lib\site-packages\boxsdk\util\chunked_uploader.py", line 90, in _upload
next_part = self._inflight_part or self._get_next_part()
File "C:\virtual\box\lib\site-packages\boxsdk\util\chunked_uploader.py", line 112, in _get_next_part
bytes_read = self._content_stream.read(self._upload_session.part_size - copied_length)
ValueError: read of closed file

Versions Used

Python SDK: 3.0.0
Python: 3.8.8

[oomorinobu]

I faced with the same program.
I used the following workaround to get around the problem.

work around

chunked_uploader = some_folder.get_chunked_uploader(file_path)
chunked_uploader._content_stream = open(file_path, "rb")
uploaded_file = chunked_uploader.start()

[oomorinobu]

I think the root cause is that the start method is not included in the with statement, and the file is closed when it is used.

[c-rei]

Hi, oomorinobu

Thanks your comments and your sample code.
I will try it with your sample code.

But I think the new version SDK has a bug about chunked upload.

[oomorinobu]

I agree with your opinion.
I thought it was caused by the following commit changes

2208047

boxsdk/object/folder.py
boxsdk/object/file.py

[lukaszsocha2]

Hi,
thank you for reporting this issue. We'll fix it soon (most likely tomorrow) and publish the fix with the next release.