source: binary-improvements2/WebServer/src/WebAPI/GetLog.cs@ 392

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

namespace Webserver.WebAPI {
        [UsedImplicitly]
        public class GetLog : AbsWebAPI {
                private const int MAX_COUNT = 1000;
                
                public override void HandleRequest (RequestContext _context) {
                        if (_context.Request.QueryString ["count"] == null || !int.TryParse (_context.Request.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 (_context.Request.QueryString ["firstLine"] == null || !int.TryParse (_context.Request.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 ("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);

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