source: binary-improvements2/MapRendering/Web/API/GetLog.cs@ 382

using System.Collections.Generic;
using System.Net;
using AllocsFixes.JSON;
using HttpListenerRequest = SpaceWizards.HttpListener.HttpListenerRequest;
using HttpListenerResponse = SpaceWizards.HttpListener.HttpListenerResponse;

namespace AllocsFixes.NetConnections.Servers.Web.API {
        public class GetLog : WebAPI {
                private const int MAX_COUNT = 1000;
                
                public override void HandleRequest (HttpListenerRequest _req, HttpListenerResponse _resp, WebConnection _user,
                        int _permissionLevel) {
                        if (_req.QueryString ["count"] == null || !int.TryParse (_req.QueryString ["count"], out int count)) {
                                count = 50;
                        }

                        if (count == 0) {
                                count = 1;
                        }

                        if (count > MAX_COUNT) {
                                count = MAX_COUNT;
                        }

                        if (count < -MAX_COUNT) {
                                count = -MAX_COUNT;
                        }

                        if (_req.QueryString ["firstLine"] == null || !int.TryParse (_req.QueryString ["firstLine"], out int firstLine)) {
                                firstLine = count > 0 ? LogBuffer.Instance.OldestLine : LogBuffer.Instance.LatestLine;
                        }

                        JSONObject result = new JSONObject ();

                        List<LogBuffer.LogEntry> logEntries = LogBuffer.Instance.GetRange (ref firstLine, count, out int lastLine);

                        JSONArray entries = new JSONArray ();
                        foreach (LogBuffer.LogEntry logEntry in logEntries) {
                                JSONObject entry = new JSONObject ();
                                entry.Add ("date", new JSONString (logEntry.date));
                                entry.Add ("time", new JSONString (logEntry.time));
                                entry.Add ("isotime", new JSONString (logEntry.isoTime));
                                entry.Add ("uptime", new JSONString (logEntry.uptime.ToString ()));
                                entry.Add ("msg", new JSONString (logEntry.message));
                                entry.Add ("trace", new JSONString (logEntry.trace));
                                entry.Add ("type", new JSONString (logEntry.type.ToStringCached ()));
                                entries.Add (entry);
                        }

                        result.Add ("firstLine", new JSONNumber (firstLine));
                        result.Add ("lastLine", new JSONNumber (lastLine));
                        result.Add ("entries", entries);

                        WriteJSON (_resp, result);
                }
        }
}