Use Transpiler on GraphAPIClient.<Post>d__5`1<GetMultiplayerInstanceResponse>.MoveNext

Author: michael-r-elp

MultiplayerCore/Installers/MpAppInstaller.cs

@@ -32,7 +32,6 @@ public override void InstallBindings()
             Container.Bind<MpBeatmapLevelProvider>().ToSelf().AsSingle();
             Container.BindInterfacesAndSelfTo<CustomLevelsPatcher>().AsSingle();
             Container.BindInterfacesAndSelfTo<NetworkConfigPatcher>().AsSingle();
-			Container.BindInterfacesAndSelfTo<GraphAPIClientPatcher>().AsSingle();
 			Container.BindInterfacesAndSelfTo<ModeSelectionPatcher>().AsSingle();
             Container.BindInterfacesAndSelfTo<PlayerCountPatcher>().AsSingle();
             Container.Bind<BGNetDebugLogger>().ToSelf().AsSingle();

MultiplayerCore/Patchers/GraphAPIClientPatcher.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using BGNet.Core.GameLift;
+using HarmonyLib;
+using SiraUtil.Affinity;
+
+namespace MultiplayerCore.Patches
+{
+	[HarmonyPatch]
+	internal class GraphAPIClientPatch
+	{
+		private static readonly HttpClient _client = new HttpClient();
+
+		private static readonly MethodInfo _sendAsyncAttacher = SymbolExtensions.GetMethodInfo(() => SendAsync(null!, 0, CancellationToken.None));
+		private static readonly MethodInfo _sendAsyncMethod = typeof(HttpClient).GetMethod(nameof(HttpClient.SendAsync), new Type[] { typeof(HttpRequestMessage), typeof(HttpCompletionOption), typeof(CancellationToken) })!;
+
+		static MethodBase TargetMethod() =>
+			AccessTools.FirstInner(typeof(GraphAPIClient), t => t.Name.StartsWith("<Post>d__5`1"))?.MakeGenericType(typeof(GetMultiplayerInstanceResponse)).GetMethod("MoveNext", BindingFlags.NonPublic | BindingFlags.Instance)!;
+
+		private static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions)
+		{
+			Plugin.Logger.Trace("Transpiling GraphAPIClient.Post");
+			var codes = instructions.ToList();
+			for (int i = 0; i < codes.Count; i++)
+			{
+				Plugin.Logger.Trace($"Instruction at index {i}: {codes[i].opcode}");
+				if (codes[i].opcode == OpCodes.Callvirt)
+				{
+					Plugin.Logger.Trace($"Callvirt Method: {codes[i].operand}");
+					if (codes[i].Calls(_sendAsyncMethod))
+					{
+						Plugin.Logger.Trace("Found SendAsync call");
+						CodeInstruction newCode = new CodeInstruction(OpCodes.Callvirt, _sendAsyncAttacher);
+						codes[i] = newCode;
+					}
+				}
+			}
+
+			return codes.AsEnumerable();
+		}
+
+		private static Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, HttpCompletionOption completionOption,
+			CancellationToken cancellationToken)
+		{
+
+			Plugin.Logger.Debug("SendAsync MasterServer Request called");
+			var result = _client.SendAsync(request, completionOption, cancellationToken);
+
+			result.ContinueWith(async task =>
+			{
+				try
+				{
+					HttpResponseMessage response = await task;
+					if (!response.IsSuccessStatusCode)
+					{
+						Plugin.Logger.Error(
+							$"An error occurred while attempting to post to the Graph API: Uri '{request.RequestUri}' StatusCode: {(int)response.StatusCode}: {response.StatusCode}");
+						Plugin.Logger.Trace($"Response: {response.Content.ReadAsStringAsync()}");
+					}
+
+				}
+				catch (Exception ex)
+				{
+					Plugin.Logger.Error(
+						$"An error occurred while attempting to post to the Graph API: Uri '{request.RequestUri}' Exception Message: {ex.Message + (ex.InnerException != null ? " --> " + ex.InnerException.Message : "")}");
+					Plugin.Logger.Trace(ex);
+				}
+			});
+			return result;
+		}
+	}
+}