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https://issues.apache.org/jira/browse/LIBCLOUD-396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13765431#comment-13765431
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Stefan Friesel commented on LIBCLOUD-396:
-----------------------------------------

As an alternative to Ivan's patch, there could also be a distinction between 
data == '' and data is None, the former meaning empty/no content and the latter 
unspecified content, in which case the Content-Length should remain untouched 
(independent of http method).
                
> Commit c10249d1d733ba5215820c5d935265de5ae6bc84 break SWIFT storage
> -------------------------------------------------------------------
>
>                 Key: LIBCLOUD-396
>                 URL: https://issues.apache.org/jira/browse/LIBCLOUD-396
>             Project: Libcloud
>          Issue Type: Bug
>          Components: Storage
>    Affects Versions: 0.13.1
>            Reporter: Ivan
>         Attachments: 0001-Set-Content-Length-to-0-only-if-it-is-not-set.patch
>
>
> Commit c10249d1d733ba5215820c5d935265de5ae6bc84 break SWIFT storage 
> (Provider.CLOUDFILES_SWIFT).
> The commit sets the Content-Length to 0 which can overwrite the existing 
> content length (in libcloud/common/base.py).
> The proposed fix: set the length to 0 only if it is not already set.

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