Glance Content-Range request returns incorrect Content-Length

[Samuel Lucidi]

When using the Glance API's Content-Range support to partially download an image, the server sets a Content-Length header equal to the size of the full image, rather than the size of the chunk specified by the Content-Range. This causes clients to wait indefinitely for the server.

Version-Release number of selected component (if applicable):
It at least affects Glance 11.0.1

Steps to Reproduce:
1. Make an authenticated GET request to /v2/images/<some_image_id>/file with
   the Content-Range header set to some value smaller than the entire length
   of the image.
2. Wait

Actual results:
Server returns a Content-Length header equal to the length of the whole image but only transmitting the requested bytes. The client waits indefinitely for the server to continue sending.

Expected results:
Server returns a Content-Length header equal to the number of bytes in the chunk, so that the client can know to disconnect.

[Nikhil Komawar (nikhil-komawar)]

Hi,

thanks for reporting this bug.

can you please specify which stores are configured for your backend storage?

thanks.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/367370

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/367528

[Samuel Lucidi (slucidi)]

Hi,

The only store configured for my Glance install is the default file store.

Thanks

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/367528
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=400230cd9d72f00caf6c1d5824da906ea335a1ad
Submitter: Jenkins
Branch: master

commit 400230cd9d72f00caf6c1d5824da906ea335a1ad
Author: Dharini Chandrasekar <email address hidden>
Date: Thu Sep 8 17:03:40 2016 +0000

    Handling HTTP range requests in Glance

    Currently Glance does not send Partial response codes while
    handling HTTP range requests. Also, content length is not
    appropriately set.

    This patch is to send partial response code and to set the correct
    content length based on the range request for image download.

    Upon success status code 206 is sent and the content length is set to the
    requested range.
    Upon failure, there can be 2 cases:
     * If the HTTP range request for the image download is bad (For example,
       requesting download of range of bytes 10 to 50 bytes when there are only 48
       bytes), status code is set to 416 and HTTPRequestRangeNotSatisfiable is
       raised.
     * If the content range is valid, but the request is not satisfiable due to
       glance_store side erros or privacy issues, appropriate exceptions are
       raised.

    APIImpact
    DocImpact

    Closes-Bug: #1417069
    Closes-Bug: #1624508
    Closes-Bug: #1399851
    Closes-Bug: #1618928

    Change-Id: I3cd47b998be79604511b3cd4879209820cf776b7

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance 14.0.0.0b3 development milestone.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Cyril Roelandt (<email address hidden>) on branch: master
Review: https://review.openstack.org/367370