On 12/10/08, Jorge Vargas <[EMAIL PROTECTED]> wrote:
>
> On Wed, Dec 10, 2008 at 2:55 AM, Christoph Zwerschke <[EMAIL PROTECTED]> 
> wrote:
>>
>> Jorge Vargas schrieb:
>>> top level array is invalid json!
>>>
>>> from the super simple spec here json.org you can see that the top
>>> level must always be a JS object which means at least one key which
>>> means always a python dict.
>>
>> Where do you get that from json.org? The text is a bit vague, but the
>> sentence "JSON is built on two structures" seems to imply that both are
>> allowed. See also rfc4627 which explicitly says:
>>
>>    A JSON text is a serialized object *or* array.
>>
> if you follow the diagram on the right, the top level element is
> object which contains members where each member is a pair where the
> key is always a string.
> On the other hand array is always a right side symbol which can only
> be a value, therefore the rule for pair forces it to be always a
> value, and never a top level.
>
> That is of course assuming that's a grammar in BNF which I think it is.
>
> on the other hand I just tried this and it worked.
> on py2.5
>>>> simplejson.dumps(range(4))
> '[0, 1, 2, 3]'
>
> so now I'm confused.

The specification I also think allows arrays, but as Mark mentioned
this is exploitable in an ajax situation:

http://bob.pythonmac.org/archives/2007/04/05/fortify-javascript-hijacking-fud/

Cheers,
Daniel

-- 
Psss, psss, put it down! - http://www.cafepress.com/putitdown

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