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Re: [Libguestfs] [PATCH 0/1] Base64-encode non-printable data

On Sep 22, 2011, at 8:51 AM, Richard W.M. Jones wrote:

> On Fri, Sep 16, 2011 at 09:30:00PM -0700, Alex Nelson wrote:
>> I expect this patch to require a second version.  I mainly wanted to
>> spur discussion:
>> * I firmly believe hivexml needs more encoding checks before printing.
> Certainly agree with that.
>> Base64 encoding made the most sense as hivexml already uses it
>> elsewhere.  Is this the right direction to go, to escape non-printable
>> data?
> Base64 is a bit of a pain for consumers to handle.  I don't really
> know what the alternatives are though.

The alternative is to use something like traditional C or Python escaping. Like\040This, and just escape the characters that require it.

>> * Should there be an enumeration for encoding decisions?  I'm returning
>> strings because it felt a little like over-engineering for something I
>> could just see as having two values.
>> * There need to be at most two encoding descriptors for a values and
>> one for nodes.  Keys and values might need to encode their names.
>> Values might also need to encode their data.  We already know I'm
>> pushing for value data to go into attributes in another patch series.
>> Could we change the "encoding" value attribute to "value_encoding"?
>> * I'd like to change values' "key" attribute to "name" attributes.
>> Rich, what are your feelings, or what are the policies to which you're
>> adhering, on changing the name of an element that hivexml has already
>> been producing?  You've been quite accepting of new functionality coming
>> in, but what about renaming what's present?
> I don't have any preferences for hivexml.  It's broken and deprecated
> at the moment, so make whatever changes are needed to make it working
> and useful.
> Rich.
> -- 
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> virt-p2v converts physical machines to virtual machines.  Boot with a
> live CD or over the network (PXE) and turn machines into Xen guests.
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