Dribble out bytes while handling long-running Complete Multipart Upload operations

[Tim Burke]

S3 docs say:

> Processing of a Complete Multipart Upload request could
> take several minutes to complete. After Amazon S3 begins
> processing the request, it sends an HTTP response header
> that specifies a 200 OK response. While processing is in
> progress, Amazon S3 periodically sends whitespace
> characters to keep the connection from timing out. Because
> a request could fail after the initial 200 OK response has
> been sent, it is important that you check the response
> body to determine whether the request succeeded.

We should do that, too! Swift already does something similar for bulk uploads and bulk deletes -- but not SLO. Swift3 may need to wait on SLO support, though :-/

[OpenStack Infra (hudson-openstack)]

Change abandoned by Tim Burke (<email address hidden>) on branch: master
Review: https://review.openstack.org/509321
Reason: Submitted against s3api as https://review.openstack.org/#/c/575818/

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/swift 2.20.0 release.

[Bhaskar Singhal (bhaskarsinghal)]

The fix only handles the multi upload. What about multi delete? Multi delete with 1000 keys can take a long time, and we should send the whitespace char to keep the connection from timing out.