[jira] [Commented] (LIBCLOUD-935) ObjectHashMismatchError while uploading the object to Swift using "upload_object_via_stream" method

["Zachary Buhman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LIBCLOUD-935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16152982#comment-16152982 ] 

Zachary Buhman commented on LIBCLOUD-935:
-----------------------------------------

This seems obviously wrong:

https://github.com/apache/libcloud/blob/trunk/libcloud/storage/base.py#L615

For the {{stream}} case, the stream iterator is used twice, once by {{connection.request}}, and again by {{_hash_buffered_stream}}. The second iteration results in an empty hash value.

The original exception:

{noformat}
ObjectHashMismatchError: <ObjectHashMismatchError in <libcloud.storage.drivers.cloudfiles.CloudFilesStorageDriver object at 0x7f83a4706e10>, value=MD5 hash checksum does not match (expected=d41d8cd98f00b204e9800998ecf8427e, actual=97a1d69438dd1ab096bbc22de9701826), object = 76cdda2d39904fe1b7aac19226e46819.png>
{noformat}

The "expected" value {{d41d8cd98f00b204e9800998ecf8427e}} comes from effectively doing:

{code:python}
>>> h = hashlib.md5()
>>> h.update(b'')
>>> h.hexdigest()
'd41d8cd98f00b204e9800998ecf8427e'
{code}



> ObjectHashMismatchError while uploading the object to Swift using "upload_object_via_stream" method
> ---------------------------------------------------------------------------------------------------
>
>                 Key: LIBCLOUD-935
>                 URL: https://issues.apache.org/jira/browse/LIBCLOUD-935
>             Project: Libcloud
>          Issue Type: Bug
>          Components: Storage
>         Environment: Apache LibCloud version 2.0.0
>            Reporter: HCLTech-SSW
>
> Getting the error "ObjectHashMismatchError" while uploading the object to swift using "upload_object_via_stream" method.
> If  uploading the object using "upload_object" there is no error occurred like "ObjectHashMismatchError".



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