niko
61 lines
3.2 KiB
C#
61 lines
3.2 KiB
C#
using System.Collections.Concurrent;
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using Campus_live_rewrite.api.server.Classes.db_class;
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namespace Campus_live_rewrite.api.server
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{
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/// <summary>
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/// Avatar-bundle download diagnostics ("[cdn-diag]" in the journal). Answers "does clothing
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/// load on platform X?" without a device log: a client that loads a bundle caches it
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/// (BestHTTP disk cache) and downloads it ONCE; a client whose load fails re-downloads the
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/// same bundle over and over (133 times an hour before the CDN-host fix, see
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/// ConfigCampus.CdnBaseUrl). Bundle requests carry no auth, so the player is recovered from
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/// the client IP their heartbeat last came from.
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///
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/// Logged per (client IP, bundle): the first download, then repeats 2, 3, 5, 10, 25, 50...
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/// A repeat line is the failure signal. 304s (revalidation of a cached copy) are success.
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/// </summary>
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public static class CdnDiag
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{
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private sealed record Client(ulong Id, string Name, string Platform, string Device, DateTime Seen);
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private static readonly ConcurrentDictionary<string, Client> _byIp = new();
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private static readonly ConcurrentDictionary<string, int> _counts = new();
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public static void NoteClient(HttpContext ctx, player_info account, int platform, int deviceClass)
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{
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try
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{
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string ip = LoginGuard.ClientIp(ctx);
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if (string.IsNullOrEmpty(ip)) return;
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string name = account.Username ?? account.DisplayName ?? account.Id.ToString();
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string plat = Enum.IsDefined(typeof(Platforms), platform) ? ((Platforms)platform).ToString() : platform.ToString();
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string dev = Enum.IsDefined(typeof(DeviceClasses), deviceClass) ? ((DeviceClasses)deviceClass).ToString() : deviceClass.ToString();
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_byIp[ip] = new Client(account.Id, name, plat, dev, DateTime.UtcNow);
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}
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catch { }
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}
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public static void OnBundle(HttpContext ctx, string bundle, bool notModified)
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{
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try
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{
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string ip = LoginGuard.ClientIp(ctx);
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int n = _counts.AddOrUpdate(ip + "|" + bundle, 1, (_, c) => c + 1);
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if (!(n <= 3 || n == 5 || n == 10 || n == 25 || n % 50 == 0)) return;
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string who = _byIp.TryGetValue(ip, out var c) && DateTime.UtcNow - c.Seen < TimeSpan.FromMinutes(10)
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? $"{c.Name}#{c.Id} platform={c.Platform} device={c.Device}"
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: "unknown player (no recent heartbeat from this IP)";
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string ua = ctx.Request.Headers.UserAgent.ToString();
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string range = ctx.Request.Headers.Range.ToString();
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string verdict = notModified ? "304 cached copy revalidated (OK)"
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: n == 1 ? "first download"
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: $"REPEAT #{n} - this client is not keeping the bundle (load likely failing)";
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Console.WriteLine($"[cdn-diag] {who} host={ctx.Request.Host.Host} bundle={bundle} {verdict}" +
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(range.Length > 0 ? $" range={range}" : "") + (ua.Length > 0 ? $" ua=\"{ua}\"" : ""));
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}
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catch { }
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}
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}
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}
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