source: binary-improvements2/WebServer/src/WebAPI/GetPlayersOnline.cs@ 391

using System.Collections.Generic;
using AllocsFixes.JSON;
using AllocsFixes.PersistentData;
using JetBrains.Annotations;

namespace Webserver.WebAPI {
        [UsedImplicitly]
        public class GetPlayersOnline : AbsWebAPI {
                public override void HandleRequest (RequestContext _context) {
                        JsonArray players = new JsonArray ();

                        World w = GameManager.Instance.World;
                        foreach ((int entityId, EntityPlayer entityPlayer) in w.Players.dict) {
                                ClientInfo ci = ConnectionManager.Instance.Clients.ForEntityId (entityId);
                                Player player = PersistentContainer.Instance.Players [ci.InternalId, false];

                                JsonObject pos = new JsonObject ();
                                pos.Add ("x", new JsonNumber ((int) entityPlayer.GetPosition ().x));
                                pos.Add ("y", new JsonNumber ((int) entityPlayer.GetPosition ().y));
                                pos.Add ("z", new JsonNumber ((int) entityPlayer.GetPosition ().z));

                                JsonObject p = new JsonObject ();
                                p.Add ("steamid", new JsonString (ci.PlatformId.CombinedString));
                                p.Add ("entityid", new JsonNumber (ci.entityId));
                                p.Add ("ip", new JsonString (ci.ip));
                                p.Add ("name", new JsonString (entityPlayer.EntityName));
                                p.Add ("online", new JsonBoolean (true));
                                p.Add ("position", pos);

                                p.Add ("level", new JsonNumber (player?.Level ?? -1));
                                p.Add ("health", new JsonNumber (entityPlayer.Health));
                                p.Add ("stamina", new JsonNumber (entityPlayer.Stamina));
                                p.Add ("zombiekills", new JsonNumber (entityPlayer.KilledZombies));
                                p.Add ("playerkills", new JsonNumber (entityPlayer.KilledPlayers));
                                p.Add ("playerdeaths", new JsonNumber (entityPlayer.Died));
                                p.Add ("score", new JsonNumber (entityPlayer.Score));

                                p.Add ("totalplaytime", new JsonNumber (player?.TotalPlayTime ?? -1));
                                p.Add ("lastonline", new JsonString (player != null ? player.LastOnline.ToString ("s") : string.Empty));
                                p.Add ("ping", new JsonNumber (ci.ping));

                                players.Add (p);
                        }

                        WebUtils.WriteJson (_context.Response, players);
                }
        }
}