I see one small problem with this approach: UUIDs are immutable,
but it's conceivable that a world operator could allow certain form
of
updating of user names, while still retaining the same identity
(I've had to manually edit user names in some cases in the worlds
I administer, for a number of reasons).
In this scenario, if an URI is resolved to a name that has changed
this can potentially require a lot of updates in the database
(e.g., if the foreign user has created many objects in the local
world).
OTOH, if the URI -> username association is stored in a different
table,
this table can also keep other, valuable, information, for example
the
date of the latest resolution, whether the world appears to be
active atm, etc.
/Zonja
On Sun, Aug 29, 2010 at 1:44 PM, Melanie <[email protected]> wrote:
We should.
Also, we should use extra info in the URI. Reson:
http://www.avination.net:8004/user/44626b40-13d6-4817-b61b-de5df7b5e7e8
The above is totally meaningless. It can't be used to do
anything
with unless www.avination.net exists and points to a
gatekeeper.
However,
http://www.avination.net/user/44626b40-13d6-4817-b61b-de5df7b5e7e8/Melanie+Milland
makes more sense here.
The URI itself provides a "Display name" that the resolver
at that
URL can treat as extra path info and ignore, if it chooses.
This would allow us to create a temporary memory cache
record of the
UUID -> name mapping that would let us display a prim
creator
without a lookup, which is a potentially frequent process.
The sim can take the URL at face value and diassemble it,
using
44626b40-13d6-4817-b61b-de5df7b5e7e8 -> "Melanie
[email protected]" for the cache and returning that
to the
viewer as the creator, all without a lookup.
While this doesn't prevent verification of stale URI's from
failing,
it does allow to display a meaningful text if that happens.
Melanie
[email protected] wrote:
> Looks like ppl are reading more into this discussion than
I intended.
>
> The hypergrid is up & running with all authentication and
security in
> place, and so are exchanges of content via HG and
archives. What's
> missing is *systematic* global identification of
resources. OpenSim
> already does that internally for resolving *certain*
identifiers on the
> Hypergrid, but nothing is stored persistently yet. That is
going to
> change soon, because 1) I want to make friends & IM work
across the HG
> (so, for example, your foreign friend needs to be
identified by a global
> ID); and 2) we really need to fix the b0rked "creator"
field in OARs/IARs.
>
> This means that we need to write URIs persistently, both
in certain
> fields of the DB (which is already prepared for what's
coming) and in
> the archives.
>
> So the issue here is really narrow. Assuming everyone
agrees that we
> should use URIs, should we add type information in the URI
or not? Any
> other thoughts on the *form* of these URIs?
>
>
> [email protected] wrote:
>> May be good to share what your use case is. As universal
are you suggesting
>> an identifier that separate, potentially un-trusted
domains, would use to
>> identify the same person?
>>
>> Is so I don't think you can do that with two parties, you
need at least one
>> more party to validate that they are the same person,
like how we do with
>> SSL certificates, or with some kind of authentication,
like you send me an
>> email address which gets me to a profile, but I still
need to enter in a
>> password or something to get access to that profile.
>>
>> M.
>>
>> -----Original Message-----
>> From: [email protected]
>> [mailto:[email protected]] On Behalf
Of Ai Austin
>> Sent: Saturday, August 28, 2010 4:59 PM
>> To: [email protected]
>> Subject: Re: [Opensim-dev] Global identifiers
>>
>> diva wrote:
>>> I'm about to introduce global identifiers, so that I can
make friends
>>> and IM work on the hypergrid, and would like feedback on
the best form
>>> of these identifiers.
>>
>>> Here are some options:
>>> ... Thoughts?
>>
>>
>> A couple of thoughts and observations Diva...
>>
>> Could the taxonomy of "types" you use cause problems if
the chosen
>> 1-1 mapping for a UUID is not felt to work well i future.
>>
>> "user" is also perhaps a different notion to a specific
"avatar"
>>
>> It would be nice if any UUID in a URI you use can be
resolved (e.g.
>> to the avatar name) by any host that has the mapping
(like the
>> distributed nature of DNS works), so its not dependent on
the host
>> continuing to exist, or to be up at the time information
on the
>> avatar is sought.
>>
>> AS an example, we have shifted our data bases between
machines and
>> have done so 3 or 4 times since we started running
OpenSim, carrying
>> the UUIDs of avatars (and the UIIDs of regions we use)
forwards to
>> the new data bases.
>>
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