source: binary-improvements/MapRendering/Web/API/GetPlayersOnline.cs@ 321

using AllocsFixes.JSON;
using AllocsFixes.PersistentData;
using System;
using System.Collections.Generic;
using System.Net;

namespace AllocsFixes.NetConnections.Servers.Web.API
{
        public class GetPlayersOnline : WebAPI
        {
                public override void HandleRequest (HttpListenerRequest req, HttpListenerResponse resp, WebConnection user, int permissionLevel)
                {
                        JSONArray players = new JSONArray();

                        World w = GameManager.Instance.World;
                        foreach (KeyValuePair<int, EntityPlayer> current in w.Players.dict) {
                                ClientInfo ci = ConnectionManager.Instance.GetClientInfoForEntityId (current.Key);
                                Player player = PersistentContainer.Instance.Players [ci.playerId, false];

                                JSONObject pos = new JSONObject();
                                pos.Add ("x", new JSONNumber ((int)current.Value.GetPosition ().x));
                                pos.Add ("y", new JSONNumber ((int)current.Value.GetPosition ().y));
                                pos.Add ("z", new JSONNumber ((int)current.Value.GetPosition ().z));

                                JSONObject p = new JSONObject();
                                p.Add ("steamid", new JSONString (ci.playerId));
                                p.Add ("entityid", new JSONNumber (ci.entityId));
                                p.Add ("ip", new JSONString (ci.ip));
                                p.Add ("name", new JSONString (current.Value.EntityName));
                                p.Add ("online", new JSONBoolean (true));
                                p.Add ("position", pos);

                                // Deprecated!
                                p.Add ("experience", new JSONNumber (player != null ? player.Experience : 0));

                                p.Add ("level", new JSONNumber (player != null ? player.Level : -1));
                                p.Add ("health", new JSONNumber (current.Value.Health));
                                p.Add ("stamina", new JSONNumber (current.Value.Stamina));
                                p.Add ("zombiekills", new JSONNumber (current.Value.KilledZombies));
                                p.Add ("playerkills", new JSONNumber (current.Value.KilledPlayers));
                                p.Add ("playerdeaths", new JSONNumber (current.Value.Died));
                                p.Add ("score", new JSONNumber (current.Value.Score));

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

                                players.Add(p);
                        }

                        WriteJSON(resp, players);
                }
        }
}