Need HUD to react as owner logs off?

Does anyone know how to get a HUD to react when the owner logs off.

I've tried using the Attach event to send an HTTP request to my web server but the request is never sent. Also tried sending an email within the Attach event. It seems that the script just hibernates at owner log off.

The same Attach event method works when the owner logs on so the comms is okay.

Any ideas whether this is possible or not?

Hopefully i have missed the obvious.

a script can't run when it's not in world, which is basically what happens to the hud when the owner logs off. you would need to poll the sl server from your server to see if the avatar is online or not. either that or you would need an object that remains in world for check the avatar's status

Thank you for confirming the situation when a person logs off and your workaround suggestions.

I was slowly coming to this conclusion but unfortunately neither workarounds are feasible due to the number of HUDs connecting to the server and database. Perhaps I'll have to imply a timeout when one HUD tries to talk to another in case the target is offline.

Just an update, I'm now using llRequestAgentData to see if the target owner is online/offline. Clearly not as good as if the target HUD reported when its owner logged off but it works.

you can have the hud send a message to an inworld object, which adds the name if not found, and then removes it if it doesn't receive a message after awhile...

if it's only needed for a single sim, you could do this via a region say on a cycle.

the receiving prim gets the message and saves the name and a timestamp, and periodically checks to see that timestamps in it's list are not older than 2 cycles. if they are it removes the associated name.

example:

//-- in the hud code
default{
  state_entry(){
    llSetTimerEvent( 300.0 ); // five minute timer
  }

  timer(){
    llRegionSay( -42, "Checking In"  );
  }
}


//-- in the receiver prim
list gLstActive; //-- Global list
list gLstTimes; //-- Global List

default{
  state_entry(){
    llListen( -42,"","","Checking In" );
    llSetTimerEvent( 600.0 );
  }

  listen( integer vIntChn, string vStrNom, key vKeyAv, string vStrMsg  ){
    integer vIdxLst = llListFindList( gLstActive, (list)vKeyAv );
    if (~vIdxLst){ // remove stale listings
      llDeleteSubList( gLstActive, vIdxLst );
      llDeleteSubList( gLstTimes, vIdxLst );
    }
     // Place Fresh listings
    gLstActive += (list)vKeyAv;
    gLstTimes += (list)llGetUnixTime();
  }

  timer(){
    integer vIntCnt;
    integer vIntTim = llGetUnixTime() - 300;
    while (vIntTim > llList2Integer( gLstTimes, vIntCnt )){
      ++vIntCnt;
    }
    if (vIntCnt){
      gLstActive = llList2List( gLstActive, vIntCnt, -1 );
      gLstTimes = llList2List( gLstTimes, vIntCnt, -1 );
    }
    //-- do whatever you want with the active names here.
  }
}

Hi Void, thank you for an interesting code solution.

Unfortunately the users and huds won't always be on their own land as the huds must be usable anywhere in SL.

Your code solution could also be extended to an in-world object send pinger emails to the huds but the expected number of huds makes this unfeasible to.

Its a pity a hud couldn't execute a few cycles event triggered by the avatar logging off as it would save a lot of effort here.

unfortunately that's about as close as we can get..... reversing the process you could have the hud send a wake up message to a particular server prim and then have that hand it off to sub scripts which do their own constant polling of the avatar in question.... but that'd rack up a LOT of use on a region really fast.

a similar trick might work for a web server, or a bot, but polling is about all we've got in this case.