[opensource-dev] ViewerAsset cap

[Brad Payne (Vir Linden)]

As noted above, this isn't really documented that I know of. The "can
fetch" field in LLAssetDictionary is the best source for what is supported
for HTTP fetch. Unsupported types include things with particular privacy
concerns, things the viewer is not allowed to see directly, things that the
viewer is supposed to have some access to but is not allowed to know the
asset id of, and various things that are not in current use at all. We
don't have any current plans to change the set of supported types.

On Sun, Aug 11, 2019 at 12:12 PM Chaser Zaks <chaser at softhyena.com> wrote:

> Let me try that again, I've never replied to mailing lists before and I
> THINK I am doing it correctly this time.
>
> There doesn't appear to be an official list of asset types supported by
> the asset cdn. I know that indra/llcommon/llassettype.cpp defines the asset
> type names in LLAssetDictionary::LLAssetDictionary() under "TYPE NAME", and
> "CAN FETCH" seems to relate to if it can fetch it over HTTP(I could be
> wrong though). At the moment the following seem to supported:
>
>    - texture
>    - sound
>    - landmark
>    - clothing
>    - bodypart
>    - animatn
>    - gesture
>    - mesh
>    - settings (EEP environment, but is called "Settings blob", so may
>    have expanded use in the future)
>
> These can also be accessed via this URL format: http://
> <cap_url>/<asset_id>.<asset_type>.
>
> Notecards (sadly) appear to be off the table, at least for now, according
> to https://jira.secondlife.com/browse/BUG-134114. I'd assume that will
> include lsltext. So that leaves:
>
>    - callcard - Handled by AIS and not really needed via HTTP. IIRC this
>    is a meta asset, it just is a pointer to a avatar.
>    - script - Legacy script, either LSL bytecode(unneeded by viewer) or
>    LSL text(see why notecards were rejected).
>    - object - No need for the viewer to download this.
>    - category - Handled via AIS.
>    - lslbyte - No need for the viewer to get this unless client side
>    scripting is added which is unlikely.
>    - txtr_tga - Unused.
>    - snd_wav - Unused.
>    - img_tga - Unused.
>    - jpeg - Unused.
>    - simstate - Will likely never ever be sent to the viewer unless in
>    god mode.
>    - link - Handled via AIS.
>    - link_f - Handled via AIS.
>    - widget - No idea what this is, appears unused. If it is what I think
>    it is(LSL XUI), it might be supported in the future.
>    - person - Probably internal agent information, no need for the viewer
>    to get this.
>
> On 8/11/19 11:30 AM, Cinder Roxley wrote:
>
> Greetings on a pleasant Sunday morning!
>
> I am updating Radegast and LibreMetaverse to support HTTP asset fetching
> via ViewerAsset capability. (
> https://github.com/cinderblocks/libremetaverse)
>
> I have scoured the wiki for API doc on ViewerAsset, and one does not exist
> publicly. I have gotten most of it to work, but I need to know what exactly
> is and is NOT supported. It appears textures, mesh, sound, animations,
> landmarks, do indeed work, and this seems to cover the bulk of what was
> obsoleted and removed.
>
> However, the viewer code would suggest any asset type should be
> downloadable, but when I attempt to use the scheme GET http://<cap_url>/?<asset
> type>_id=<asset id> notecard, lsltext, and other asset types return
> “Invalid Syntax”.
>
> So my question is, what asset types are supported? Is migration to HTTP
> ongoing? eg. Will notecards and scripts be moved to the capability away
> from UDP? If so, I will simply handle the error code and fallback. If
> there’s no plan to move them, I won’t bother with that and leave fetching
> on UDP for unsupported types.
>
>
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> --
> Kyler "Félix" Eastridge
> Softhyena.com
> 78 Princess CT. 42701
> Elizabethtown, Kentucky, U.S.A.
>
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