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= OpenSimulator Internals/Connector Architecture/Presence Connector =

== Overview ==

PresenceServicesConnector is the simulator-side remote connector for IPresenceService. It translates IPresenceService calls into HTTP POST requests to the ROBUST Presence handler at /presence.

Source file:

OpenSim/Services/Connectors/Presence/PresenceServicesConnector.cs

----

=== Initialisation ===

Config section: [PresenceService]

Required key:
* PresenceServerURI -- URL of the ROBUST Presence endpoint; throws if missing

Base class BaseServiceConnector.Initialise() called for auth setup.

Three constructors:
* Default (no args) -- URI must be set externally
* String URI -- used by callers that pass the URI directly
* IConfigSource -- calls Initialise(), normal grid mode

----

=== Transport ===

All methods POST to m_ServerURI + "/presence" using SynchronousRestFormsRequester.

All requests include:
* VERSIONMIN / VERSIONMAX -- protocol version negotiation
* METHOD -- identifies the operation

Success detection for login/logout/report methods:
* LoginAgent, LogoutAgent, LogoutRegionAgents: scan raw reply string for "success" (case-insensitive substring search -- not XML parse)
* ReportAgent: parses XML response, checks result field == "success"
* All return false on empty reply or exception

----

=== Methods ===

{| class="wikitable"
! Method !! METHOD field !! Fields sent !! Returns
|-
| LoginAgent(userID, sessionID, secureSessionID) || "login" || UserID, SessionID, SecureSessionID || bool
|-
| LogoutAgent(sessionID) || "logout" || SessionID || bool
|-
| LogoutRegionAgents(regionID) || "logoutregion" || RegionID || bool
|-
| ReportAgent(sessionID, regionID) || "report" || SessionID, RegionID || bool
|-
| GetAgent(sessionID) || "getagent" || SessionID || PresenceInfo or null
|-
| GetAgents(string[] userIDs) || "getagents" || uuids (List<string>) || PresenceInfo[] or null
|}

GetAgent():
* Parses XML response
* Returns PresenceInfo constructed from result dictionary
* Returns null if result == "null", reply is empty, or result is not a dictionary

GetAgents():
* Sends userIDs as uuids key (List<string>)
* Iterates all values in reply dictionary, constructs PresenceInfo for each dictionary entry
* Returns empty array if result == "null" or "Failure"
* Returns null on empty reply or exception

----

=== Notes ===

* LoginAgent, LogoutAgent, and LogoutRegionAgents use raw string search for "success" rather than XML parsing -- different from ReportAgent which parses XML. This is inconsistent within the same file.
* ScopeID fields are present in the code but commented out throughout.

----

== See Also ==

* [[OpenSimulator Internals/Connector Architecture]]
* [[OpenSimulator Internals/Code Map/ROBUST/PresenceService]]
* [[OpenSimulator Internals/Code Map/Shared]]

OpenSimulator Internals/Connector Architecture/Presence Connector - Revision history

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