[Standards] private storage revisited

Joe Hildebrand hildjj at gmail.com
Sun Jul 8 20:57:35 UTC 2007


Sigh. One of the goals of PEP was that it was supposed to be easy to
implement on the clioent side.



On 7/8/07, Mridul Muralidharan <mridul at sun.com> wrote:
> Ian Paterson wrote:
> > Peter Saint-Andre wrote:
> >> So we'd have something like this:
> >>
> >> <iq from='juliet at capulet.com/balcony' type='set' id='foo'>
> >>   <pubsub xmlns='http://jabber.org/protocol/pubsub'>
> >>     <publish node='http://jabber.org/protocol/activity'>
> >>       <item>
> >>         <activity xmlns='http://jabber.org/protocol/activity'>
> >>           <relaxing>
> >>             <partying/>
> >>           </relaxing>
> >>           <text xml:lang='en'>My nurse's birthday!</text>
> >>         </activity>
> >>       </item>
> >>     </publish>
> >>     <preconditions>
> >>       <x xmlns='jabber:x:data' type='submit'>
> >>         <field var='FORM_TYPE' type='hidden'>
> >>           <value>http://jabber.org/protocol/pubsub#node_config</value>
> >>         </field>
> >>         <field var='pubsub#access_model'>
> >>           <option><value>whitelist</value></option>
> >>         </field>
> >>       </x>
> >>     </preconditions>
> >>   </pubsub>
> >> </iq>
> >>
> >> If the node exists and the precondition is not met (in this case, if the
> >> access model is something other than "whitelist"), then the publish
> >> fails with a suitable error condition (probably <conflict/> along with
> >> some pubsub-specific condition).
> >>
> >> If the node exists and the precondition is met, then the publish
> >> succeeds.
> >>
> >> If the node does not exist, then the service auto-creates the node with
> >> default configuration in all respects except those specified in the
> >> preconditions (in this case, the node would be created with an access
> >> model of "whitelist") and the publish succeeds.
> >>
> >> Correct?
> >>
> >
> > Correct. +1
> >
> > Thank you Ralph, Peter.
> >
> > Wow! consensus on Personal Publishing! I'm off to celebrate :-) :-)
> >
> > - Ian
> >
>
> Whether to autocreate or to return error saying node does not exist
> (item-not-found) - can this be an implementation detail ? That is, are
> clients expected to handle the error path too and explictly create ?
> We do not have auto create in pubsub iirc (not sure if pubsub was
> modified to support this) - so supporting this for pep will implictly
> mean supporting it for pubsub too (same namespace, etc).
>
> But in general, preconditions are great way to assert access level for
> clients/nodes which require strict acl's.
>
> Regards,
> Mridul
>
> PS : Hope this is not going back to the same path's earlier, just wanted
> to get it clarified.
>


-- 
Joe Hildebrand



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