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https://issues.apache.org/jira/browse/LIBCLOUD-1043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Clemens Wolff updated LIBCLOUD-1043:
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Affects Version/s: 2.4.0
> Azure Storage driver crashes when passed a non file-like iterator
> -----------------------------------------------------------------
>
> Key: LIBCLOUD-1043
> URL: https://issues.apache.org/jira/browse/LIBCLOUD-1043
> Project: Libcloud
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Clemens Wolff
> Priority: Major
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> The azure_blobs implementation of {{upload_object_via_stream(iterator, ...)}}
> currently assumes that the passed-in iterator always is a file-like object
> that implements {{seek(...)}}
> ([source|https://github.com/apache/libcloud/blob/a1f9897ce107eb1b01674262ca1b9ff1f91d46f0/libcloud/storage/drivers/azure_blobs.py#L828-L830]).
> This means that function crashes when used with arbitrary iterators as
> returned by {{iter(...)}}.
> Notably, the libcloud integration for django-storages exercises this
> functionality
> ([source|https://github.com/jschneier/django-storages/blob/b441b74a17a46eb87ee4b10f60774b9a080c0fe1/storages/backends/apache_libcloud.py#L158])
> which makes django-storages + libcloud + Azure Blobs currently unusable. See
> detailed stacktrace below:
> {code:python}
> Traceback (most recent call last):
> File ".../app/manage.py", line 15, in <module>
> execute_from_command_line(sys.argv)
> File "...\lib\site-packages\django\core\management\__init__.py", line 381,
> in execute_from_command_line
> utility.execute()
> File "...\lib\site-packages\django\core\management\__init__.py", line 375,
> in execute
> self.fetch_command(subcommand).run_from_argv(self.argv)
> File "...\lib\site-packages\django\core\management\base.py", line 316, in
> run_from_argv
> self.execute(*args, **cmd_options)
> File "...\lib\site-packages\django\core\management\base.py", line 353, in
> execute
> output = self.handle(*args, **options)
> File
> "...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py",
> line 188, in handle
> collected = self.collect()
> File
> "...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py",
> line 114, in collect
> handler(path, prefixed_path, storage)
> File
> "...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py",
> line 353, in copy_file
> self.storage.save(prefixed_path, source_file)
> File "...\lib\site-packages\django\core\files\storage.py", line 49, in save
> return self._save(name, content)
> File "...\lib\site-packages\storages\backends\apache_libcloud.py", line
> 157, in _save
> self.driver.upload_object_via_stream(iter(file), self._get_bucket(), name)
> File "...\lib\site-packages\libcloud\storage\drivers\azure_blobs.py", line
> 828, in upload_object_via_stream
> iterator.seek(0, os.SEEK_END)
> AttributeError: 'generator' object has no attribute 'seek'
> {code}
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