Open Stack

You may be interested in Storlets. It's another OpenStack project, 
maintained by a Swift core reviewer, that provides this sort of 
user-defined middleware functionality.

You can also ask about it in #openstack-swift

--John



On 16 Sep 2018, at 9:25, Qiao Kang wrote:

> Hi,
>
> I'm wondering whether Swift allows any user (not the administrator) to
> specify which middleware that she/he wants his data object to go 
> throught.
> For instance, Alice wants to install a middleware but doesn't want Bob 
> to
> use it, where Alice and Bob are two accounts in a single Swift 
> cluster.
>
> Or maybe all middlewares are pre-installed globally and cannot be
> customized on a per-account basis?
>
> Thanks,
> Qiao
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