Comment 4 for bug 1056220

Reviewed: https://review.openstack.org/13709
Committed: http://github.com/openstack/python-glanceclient/commit/727aadbc257ec3c99dd1621202948d288d45c8cc
Submitter: Jenkins
Branch: master

commit 727aadbc257ec3c99dd1621202948d288d45c8cc
Author: Stuart McLaren <email address hidden>
Date: Wed Sep 26 12:56:51 2012 +0000

    Handle create/update of images with unknown size

    It may not be possible to know in advance the total
    size of image data which is to be uploaded, for example
    if the data is being piped to stdin.

    To handle this we use HTTP Transfer-Encoding: chunked
    and do not set any image size headers.

    Various subtly different cases needed to be handled for
    both image-create and image-update, including:

     * input from named pipe
     * piped input of zero size
     * regular file of zero length

    Fix for bug 1056220.

    Change-Id: I0c7f0a64d883e058993b954a1c465c5b057f2bcf