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From Chris Lalancette <>
Subject Re: Blob metadata updates
Date Thu, 18 Aug 2011 14:47:55 GMT
On 08/18/11 - 10:37:46AM, wrote:
> Hi Chris,
> basically, what David said... more inline
> On 17/08/11 21:00, David Lutterkort wrote:
> >On Wed, 2011-08-17 at 11:20 -0400, Chris Lalancette wrote:
> >>All,
> >>     It seems to me that blob metadata updates aren't quite working in 0.4.0.
> >>It looks like BlobHelper::extract_blob_metadata_hash is being fed request.env
> >>directly, but I don't think that is right.  If your client does a POST with
> >>form parameters like:
> >>
> >>HTTP-X-Deltacloud-Blobmeta-name=myname
> >>
> >>Then those parameters are actually available in
> >>request.env['rack.request.query_hash'].  The attached patch makes that change
> This is true - however, our API defines that the way to *update blob
> metadata* is using request headers
> ( I don't think
> we ever supported blob header updates using form fields. I mean, I
> don't think this has anything to do with 0.4 as this wouldn't have
> worked for the blob update operation even in 0.3. I checked through
> the git history though this stuff is a little old so i may have
> missed something and be wrong on this.

No, you are right.  When I wrote the stuff in libdeltacloud I must have screwed
something up.

> >>and seems to fix it in my tests.  However, it is also possible that my
> >>libdeltacloud client is doing the wrong thing here.  Thoughts?
> >>
> >
> >It's a little confusing since we also take the metadata params as
> >request params - but that is only there to support the HTML UI, and only
> >done for POST.
> As David says, I suspect the confusion stems from the fact that for
> the blob *create* operation using POST, blob metadata is defined
> using form fields
> ( The POST
> operation for creating blobs is a special case, and is only there to
> support the HTML interface. More on this in response to your other
> email ("Blob Creation")

And yeah, that's where I think my confusion came from.  I'll fix up my
libdeltacloud code to use request headers.  Thanks for reviewing it.

Chris Lalancette

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