Linden Lab Official:Inventory API

This document uses LLIDL for terse description of the HTTP POST and response bodies.

Viewer Capabilities

The Viewer receives four Inventory API capabilities. A fifth one, FetchInventoryDescendents, is deprecated by WebFetchInventoryDescendents.

Note: descendants is frequently but haphazardly misspelled as descendents in the code. Sadly, these misspellings are fixed in place due to existing widespread deployment.

WebFetchInventoryDescendents

Follows the Fetch Inventory Descendents API, fetches the agent's inventory structure.

FetchInventory

Follows the Fetch Inventory Items API, fetches the agent's items.

FetchLibDescendents

Follows the Fetch Inventory Descendents API, fetches library inventory structure.

FetchLib

Follows the Fetch Inventory Items API, fetches library inventory items.

Structures

The Inventory API returns values that use the following standardized LLSD data structures:

• Category - can contain items and other categories.
• Item - A handle that can point to a valid asset in the system.
• Permission - permissions information for an item.
• Sale info - information on sale of an item

Categories and items are not required to have unique names. The system generates all categories with a non-null asset_type and you cannot delete them. All user-generated categories have type_default null.

Category

The category data structure can contain items and other categories. The combination of agent_id and category_id uniquely identify a category. A special root category has type_default = folder (a category for folders) and a parent_id of null UUID (00000000-0000-0000-0000-000000000000).

The category data structure consists of a single LLSD map with the values described in the following table.

Key	Datatype	Description
agent_id	UUID	Agent's UUID
category_id	UUID	Category's UUID
name	string	Text name of the category
parent_id	UUID	Parent category's UUID
type_default	integer	Asset type value.
version	integer	Version number

LLIDL

<python>&category = {

   agent_id        : uuid,
   category_id     : uuid,
   parent_id       : uuid,
   name            : string,
   type_default    : int,
   version         : int,
}</python>

Item

The item data structure refers to a valid asset in the system and contains enough information to find the asset in our domain, as well as permissions information. An item is uniquely identified by the combination of agent_id and item_id.

The item data structure consists of a map containing the following elements:

Return value	Datatype	Description
agent_id	UUID
asset_id	UUID
created_at	int	timestamp?
desc	string
flags	integer
inv_type	integer	inventory type
item_id	UUID
name	string
parent_id	UUID
permissions	Map containing Permissions
sale_info	Map containing Sale info
type	integer	asset type

LLIDL

<python>&item = {

   agent_id        : uuid,
   item_id         : uuid,
   parent_id       : uuid,  (category_id of the containing folder)
   asset_id        : uuid,  (available only for downloadable assets)
   name            : string,
   desc            : string,
   created_at      : int,   (timestamp)
   type            : int,   (asset type)
   inv_type        : int,   (inventory type)
   flags           : int,   (type-specific flags)
   permissions     : &permissions,
   sale_info       : &sale_info,
}</python>

Permissions

The permissions structure is a map containing the following elements:

Return value	Datatype	Description
base_mask	integer
creator_id	UUID
everyone_mask	integer
group_id	UUID	if the object is group-owned, this will have a value.
group_mask	integer
is_owner_group	bool
last_owner_id	UUID
next_owner_mask	integer
owner_id	UUID	always same as agent_id
owner_mask	integer

LLIDL

<python>&permissions = {

   creator_id      : uuid,
   owner_id        : uuid,   (always same as agent_id)
   group_id        : uuid,
   last_owner_id   : uuid,
   is_owner_group  : bool,
   base_mask       : int,
   group_mask      : int,
   owner_mask      : int,
   next_owner_mask : int,
   everyone_mask   : int,
}</python>

Sale info

The sale info structure is a map containing the following elements:

Return value	Datatype	Description
sale_price	integer
sale_type	integer

LLIDL

<python>&sale_info = {

   sale_price      : int,
   sale_type       : int,
}</python>

Links

Item Links

Item links have inventory_type 24. The asset_id field of the item points to an item_id. When the parent category contents are retrieved, both the link item and the link target appear in the listing. Viewer must resolve the links by using the target item's information and removing the target item from the listing. Broken links, that is, a link item for which there is no corresponding target item, must be shown as broken links, allowing the user to take corrective action.

Folder Links

Folder links are represented by items with inventory_type 25. The asset_id field of the item points to a category_id. Viewers should enable viewing of the contents of the target category, while indicating that the category is a link.

API

Fetch Inventory Items

Returns information on the specified inventory items.

HTTP method: POST

Path:

FetchInventoryCapURL

Parameters

Query (POST) parameters:

• items - a map with one key, 'items', whose value is an array of maps, each with one key, 'item_id', whose value is the item you want information about.

Return value

The response is a map containing two keys, as shown in the following table.

Key	Datatype	Description
agent_id	UUID	UUID of the agent in question
items	array	Array of item data structures.

Each item data structure is a map with the following elements:

Return value	Datatype	Description
agent_id	UUID
asset_id	UUID
created_at	int	timestamp?
desc	string
flags	integer
inv_type	integer	same as asset type?
item_id	UUID
name	string
parent_id	UUID
permissions	Map containing Permissions
sale_info	Map containing Sale info
type	integer	asset type

Example

TBD

LLIDL

<python>

%% FetchInventoryCapURL
-> { items: [{ item_id: uuid }, ... ] }
<- { agent_id: uuid, items: [ &item, ... ] }

</python>

Fetch Inventory Descendents

HTTP method: POST

Path:

FetchInventoryDescendentsCapURL

Using HTTP POST, send a body containing a map with one key, 'folders', whose value is an array of maps, each with one key, 'folder_id', each of whose value is the category you want information about.

The response is a map containing one key, 'folders', whose value is an array of folder structures with bonus descendents information.

Parameters

Query parameters:

• folder_ids - map with one key, 'folders', whose value is an array of maps, each with one key, 'folder_id', each of whose value is the UUID of the category on which you want information.

Return value

Returns a map with a single element, folders, that is an array with a single element that is a map with the following elements:

Key	Datatype	Description
agentid	UUID	UUID of the agent in question
owner_id	undef
folder_id	UUID
version	int
descendents	int	Note typo!
categories	Array of category data structure	See below for elements.
items	Array of item data structures.	See below for elements.

Each category data structure is a map with the following elements: {{#lst:Inventory API|category }}

Each item data structure is a map with the following elements: {{#lst:Inventory API|item}}

Example

TBD

LLIDL

<python>

%% FetchInventoryDescendentsCapURL
-> { folders: [{ folder_id: uuid }, ... ] }
<- { folders: [{ agent_id: uuid,
                 owner_id: uuid,
                 folder_id: uuid,
                 version: int,
                 descendents: int,                 (len(items) + len(categories))
                 categories: [ &category, ... ],
                 items: [ &item, ... ]
              }] }

</python>