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From Bernd Fondermann <bf_...@brainlounge.de>
Subject Re: [Vysper] Namespace handling on XMLElement
Date Mon, 06 Jul 2009 08:44:56 GMT
Niklas Gustavsson wrote:
> On Mon, Jul 6, 2009 at 7:36 AM, Bernd Fondermann<bf_jak@brainlounge.de> wrote:
>> Yes, I'm too.
>> In the beginning, I thought this is like XML. But it isn't quite like
>> it. Prefixes only are important when starting streams (and maybe later
>> when you have conflicting XML payload in a stanza.
>>
>> Here an excerpt from 12.2.3. Extended Namespaces in
>>  http://tools.ietf.org/html/draft-saintandre-rfc3920bis-09
>>
>>   An implementation SHOULD NOT generate namespace prefixes for elements
>>   qualified by content (as opposed to stream) namespaces other than the
>>   default namespace.  However, if included, the namespace declarations
>>   for those prefixes MUST be included on the stanza root or a child
>>   thereof, not at the level of the stream element (this helps to ensure
>>   that any such namespace declaration is routed and delivered with the
>>   stanza, instead of assumed from the stream).
>> <<<<
>>
>> This confused me a lot.
> 
> Me too, if I'm reading this correctly it says one should never used
> prefixed namespaces, but if you really need to, it should be declared
> on the stanza level. Which kind of seems to make sense if one wants to
> keep the XML as simple as possible.

Exactly.

> 
>> Do you have the malicious stanza at hand?
> 
> <auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="PLAIN"
> xmlns:ga="http://www.google.com/talk/protocol/auth"
> ga:client-uses-full-bind-result="true">AHVzZXIxAHBhc3N3b3JkMQ==</auth>
> 
> This extension is documented here:
> http://code.google.com/apis/talk/jep_extensions/jid_domain_change.html

I think we need a JIRA for this.

  Bernd


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