[JDEV] New html tag in messages

Peter Saint-Andre stpeter at jabber.org
Mon Aug 19 09:36:40 CDT 2002

Yes, you can send something like this:

<message to='thing1'>
  <html xmlns='xhtml-basic'>
    <message>another message!</message>
    <iq>here's an iq!</iq>
    <presence type='unsubscribe'/>

So what? A client is supposed to treat the stuff in the <html/> element
differently -- it's not real Jabber XML because it's not a direct child of
the <stream:stream/> element. Perhaps we need to make that clearer in the
documentation? Actually the XHTML namespace has not been converted to a
JEP yet, so I'd think this will be mentioned there.

But of course this is not limited to XHTML. I could do something like

<presence to='thing1' type='subscribe'>
  <more xmlns='messed-up'>
    <presence type='unsubscribe'/>

If the client receiving this does not understand the 'messed-up' namespace
it is supposed to ignore the stuff in the <more/> element. If 'messed-up'
is the client understands it (e.g., it is a valid namespace according to
the JSF and the client is protocol-compliant), then it knows what to do
with that nested presence element, but it certainly would not be treated
in the same way as a first-level presence element.


Peter Saint-Andre
Jabber Software Foundation

On Sun, 18 Aug 2002, Kriggs wrote:

> Right. I'm wondering if you can pass along some malicious tags in a <html/> 
> block, such as <message/>, that some clients might pickup on and run even if 
> they really shouldn't.
> -Kriggs
> On August 17, 2002 09:42 pm, you wrote:
> > I think that Kriggs in inquiring on the ability to nest IQ elements within
> > the HTML element - rather than the other way around.
> >
> > From: "Sami Haahtinen" <ressu at ressukka.net>
> >
> > > it doesn't really matter what you pass on in the <IQ/> as long as it's
> > > valid XML (which xhtml is) so you can add your own tags to the set as
> > > you wish.
> > >
> > > Sami
> >
> > _______________________________________________
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> > jdev at jabber.org
> > http://mailman.jabber.org/listinfo/jdev
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