[openstack-dev] upgrading WebOb across all projects

Doug Hellmann doug.hellmann at dreamhost.com
Thu Jan 3 16:37:23 UTC 2013

I missed Quantum, but Zhongyue Luo caught it:



On Thu, Jan 3, 2013 at 11:32 AM, Doug Hellmann
<doug.hellmann at dreamhost.com>wrote:

> The ceilometer team is using Pecan [1] for our next-generation API
> framework. Pecan depends on a newer WebOb than is used by the other
> OpenStack components, so I spent this morning reviewing the differences in
> WebOb between 1.0.8 and 1.2.3 (the latest stable release) [2] and what
> impact those changes might have on nova, cinder, keystone, and oslo (the 4
> projects where I found WebOb being used -- please let me know if I missed
> one).
> Most of the changes appear to be bug fixes and changes that either have a
> backwards-compatible alias, are deprecations that were reversed later, or
> should not have an impact on us because we were not using the changed area
> of the code directly. The only thing I found to be questionable is the
> change to Request.path_info and Request.script_name. Those properties are
> now unicode objects instead of str objects, as WebOb is trying to provide
> better Python 3 support. I found a few uses of those variables in
> comparisons and concatenation with str objects, but the casting should work
> automatically as long as the path can be encoded in the default encoding,
> which should be the case as the paths to our API use only ASCII characters.
> All of the unit tests pass when I run them locally.
> I have submitted patches against the 4 projects to update the version
> number in tools/pip-requires, without any other code changes:
> Oslo: https://review.openstack.org/#/c/18885/
> Nova: https://review.openstack.org/#/c/18886/
> Keystone: https://review.openstack.org/#/c/18887/
> Cinder: https://review.openstack.org/#/c/18888/
> If anyone else has done similar analysis in the past and come to a
> different conclusion about whether it is safe to upgrade, please let me
> know.
> Doug
> [1] Pecan: http://pecan.readthedocs.org/en/latest/
> [2] The full release notes for WebOb:
> http://docs.webob.org/en/latest/news.html
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