Currently cinderclient doesn't handle properly incoming and outgoing
encode / decode process. As a solution for this, this patch implements a
decoding process for all data incoming from the user side and encodes
everything going out of the client, i.e: http requests, prints, etc.
This patch introduces a new module (strutils.py) taken from
oslo-incubator in order to use 2 of the functions present in it:
About safe_(decode|encode):
Both functions try to encode / decode the incoming text using the
stdin encoding, fallback to python's default encoding if that
returns None or to UTF-8 as the last option.
In both functions only basestring objects are accepted and they both
raise TypeError if an object of another type is passed.
About the general cinderclient changes:
In order to better support non-ASCII characters, it is a good
practice to use unicode interanlly and encode everything that has to
go out. This patch aims to do that and introduces this behaviour in
the client.
Testing:
A good test (besides using tox) is to use cinder client with and
without setting any locale (export LANG=).
Fixes bug: 1130572
Change-Id: Idb7d06954c29e003f68a0c4aa0b80ecc7017cbc9