Copy xlcore's method for frontier fallback

src/XIVLauncher.Common/Constants.cs

@@ -10,6 +10,8 @@ public static class Constants
         public const uint STEAM_APP_ID = 39210;
         public const uint STEAM_FT_APP_ID = 312060;
 
+        public const string LAUNCHER_CONFIG_URL = "https://kamori.goats.dev/Launcher/GetLauncherClientConfig";
+        public const string FRONTIER_FALLBACK = "https://launcher.finalfantasyxiv.com/v650/index.html?rc_lang={0}&time={1}";
         public static string PatcherUserAgent => GetPatcherUserAgent(PlatformHelpers.GetPlatform());
 
         private static string GetPatcherUserAgent(Platform platform)
@@ -29,4 +31,4 @@ private static string GetPatcherUserAgent(Platform platform)
             }
         }
     }
-}
+}

src/XIVLauncher.Common/Util/ApiHelpers.cs

@@ -1,6 +1,10 @@
+using Serilog;
 using System;
 using System.Linq;
+using System.Net.Http;
+using System.Net.Http.Json;
 using System.Net.Http.Headers;
+using System.Threading.Tasks;
 
 namespace XIVLauncher.Common.Util;
 
@@ -95,4 +99,34 @@ public static void AddWithoutValidation(this HttpHeaders headers, string key, st
         var attributes = memInfo[0].GetCustomAttributes(typeof(TAttribute), false);
         return (attributes.Length > 0) ? (TAttribute)attributes[0] : null;
     }
+
+    /// <summary>
+    ///     Represents a response from Kamori's GetLauncherClientConfig endpoint.
+    /// </summary>
+    public struct LauncherClientConfig
+    {
+        public string frontierUrl { get; set; }
+        public string? cutOffBootver { get; set; }
+        public uint flags { get; set; }
+
+        public static async Task<LauncherClientConfig> GetAsync()
+        {
+            try
+            {
+                HttpClient HttpClient = new()
+                {
+                    Timeout = TimeSpan.FromSeconds(5)
+                };
+                return await HttpClient.GetFromJsonAsync<LauncherClientConfig>(Constants.LAUNCHER_CONFIG_URL).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                Log.Error(ex, "Could not obtain LauncherClientConfig");
+                return new LauncherClientConfig()
+                {
+                    frontierUrl = Constants.FRONTIER_FALLBACK,
+                };
+            }
+        }
+    }
 }

src/XIVLauncher.Common/XIVLauncher.Common.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <Product>XIVLauncher.Common</Product>
         <AssemblyTitle>XIVLauncher.Common</AssemblyTitle>
@@ -52,6 +52,7 @@
         <PackageReference Include="Serilog.Sinks.File" Version="5.0.0" />
         <PackageReference Include="SharedMemory" Version="2.3.2" />
         <PackageReference Include="System.Memory" Version="4.5.4" />
+        <PackageReference Include="System.Net.Http.Json" Version="6.0.0" />
         <PackageReference Include="System.Security.Principal.Windows" Version="5.0.0" />
         <PackageReference Include="System.Text.Json" Version="6.0.6" />
     </ItemGroup>

src/XIVLauncher.PatchInstaller/Commands/IndexUpdateCommand.cs

@@ -78,7 +78,7 @@ private IndexUpdateCommand(ParseResult parseResult)
 
     private async Task<int> Handle(CancellationToken cancellationToken)
     {
-        var la = new Launcher((ISteam?)null, new CommonUniqueIdCache(null), this.settings, "https://launcher.finalfantasyxiv.com/v650/index.html?rc_lang={0}&time={1}");
+        var la = new Launcher((ISteam?)null, new CommonUniqueIdCache(null), this.settings, XIVLauncher.Common.Util.ApiHelpers.LauncherClientConfig.GetAsync().GetAwaiter().GetResult().frontierUrl);
 
         var bootPatchListFile = new FileInfo(Path.Combine(this.settings.GamePath.FullName, "bootlist.json"));
 

src/XIVLauncher/Windows/ViewModel/MainWindowViewModel.cs

@@ -78,7 +78,7 @@ public MainWindowViewModel(Window window)
             var frontierUrl = Updates.UpdateLease?.FrontierUrl;
 #if DEBUG || RELEASENOUPDATE
             // FALLBACK
-            frontierUrl ??= "https://launcher.finalfantasyxiv.com/v650/index.html?rc_lang={0}&time={1}";
+            frontierUrl ??= XIVLauncher.Common.Util.ApiHelpers.LauncherClientConfig.GetAsync().GetAwaiter().GetResult().frontierUrl;
 #endif
 
             Launcher = App.GlobalSteamTicket == null