Add Location header for asynchronous resource creation

[wanghao]

According the HTTP guidelines of Openstack API Working Group. For asynchronous resource creation, Cinder must return a Location header set to one of the following:
the URI of the resource to be created, if known.
the URI of a status resource that the client can use to query the progress of the asynchronous operation.

Now we need to support this at wsgi module for volume creation/management, snapshot creation/management, backup creation, etc.

[John Griffith (john-griffith)]

It's a "guideline" and it appears to have just been uploaded a week ago. I'm absolutely fine with somebody implementing this (and we should assuming anybody else will pay attention to it), def a wishlist item AFAIAC

[John Griffith (john-griffith)]

BTW.. for those that might be looking for it:
http://specs.openstack.org/openstack/api-wg/guidelines/http.html

[Sean McGinnis (sean-mcginnis)]

Automatically unassigning due to inactivity.

[Ivan Kolodyazhny (e0ne)]

This of this bug contains APIImpact, so I would propose it for O release

[Sean McGinnis (sean-mcginnis)]

Unassigning due to no activity for > 6 months.