source: binary-improvements/MapRendering/Web/API/GetPlayersLocation.cs@ 322

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

namespace AllocsFixes.NetConnections.Servers.Web.API
{
        public class GetPlayersLocation : WebAPI
        {
                public override void HandleRequest (HttpListenerRequest req, HttpListenerResponse resp, WebConnection user, int permissionLevel)
                {
            AdminTools admTools = GameManager.Instance.adminTools;
            user = user ?? new WebConnection ("", "", 0L);

                        bool listOffline = false;
                        if (req.QueryString ["offline"] != null) {
                                bool.TryParse (req.QueryString ["offline"], out listOffline);
                        }

            bool bViewAll = WebConnection.CanViewAllPlayers (permissionLevel);

            JSONArray playersJsResult = new JSONArray ();

                        Players playersList = PersistentContainer.Instance.Players;

                        foreach (string sid in playersList.SteamIDs) {
                if (admTools != null)
                    if (admTools.IsBanned (sid))
                        continue;

                Player p = playersList [sid, false];

                                if (listOffline || p.IsOnline) {
                        ulong player_steam_ID = 0L;
                        if (!ulong.TryParse (sid, out player_steam_ID))
                            player_steam_ID = 0L;

                        if ((player_steam_ID == user.SteamID) || bViewAll) {
                            JSONObject pos = new JSONObject ();
                            pos.Add("x", new JSONNumber (p.LastPosition.x));
                            pos.Add("y", new JSONNumber (p.LastPosition.y));
                            pos.Add("z", new JSONNumber (p.LastPosition.z));

                            JSONObject pJson = new JSONObject ();
                            pJson.Add("steamid", new JSONString (sid));
        //                                      pJson.Add("entityid", new JSONNumber (p.EntityID));
        //                    pJson.Add("ip", new JSONString (p.IP));
                            pJson.Add("name", new JSONString (p.Name));
                            pJson.Add("online", new JSONBoolean (p.IsOnline));
                            pJson.Add("position", pos);

        //                                      pJson.Add ("totalplaytime", new JSONNumber (p.TotalPlayTime));
        //                                      pJson.Add ("lastonline", new JSONString (p.LastOnline.ToString ("s")));
        //                                      pJson.Add ("ping", new JSONNumber (p.IsOnline ? p.ClientInfo.ping : -1));

                                                playersJsResult.Add (pJson);
                        }
                                }
            }

                        WriteJSON (resp, playersJsResult);
                }
        }
}