[Qemu-devel] Re: [PATCH 3/8] Add QBuffer

[Jan Kiszka]

Avi Kivity wrote:
> On 05/15/2010 11:45 AM, Jan Kiszka wrote:
>>
>>> Instead of encoding just as a string, it would be a good idea to encode
>>> it as something like:
>>>
>>> {'__class__': 'base64', 'data': ...}
>>>
>>> We've discussed using hidden properties to describe special things like
>>> abstract classes and since we already have this namespace reserved, I
>>> think it's a good time to use it.
>>>
>>> The advantage is that in a dynamic language like Python, the parser can
>>> convert base64 to binary strings automatically without having to
>>> understand the QMP protocol.
>>>      
>> Indeed, was amazingly simple to add and works nicely with qmp-shell as
>> demonstrator. Will repost, also to fix a few remaining glitches I came
>> across in the meantime.
>>
>>    
> 
> Is this __class__ stuff documented anywhere?
> 

Not yet. Also, we should clarify the proposed private extension section
that only "__some_key" is reserved for downstream, not
'__some_other_key__' (i.e. downstream names must not end with '__').

Jan

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