Support lol-US locale for IPC requests (#2435)

* Support lol-US locale for IPC requests

* Support sr-CS as well

* Apply feedback

* Apply feedback and Rider cleanup

* Less allocations make everyone happy

* Apply feedback

* Explain why we're doing this stupidity

* Uppercase Windows/Linux compat fix

* Go back to earlier version

ArchiSteamFarm/Core/AprilFools.cs

@@ -37,7 +37,7 @@ namespace ArchiSteamFarm.Core {
 
 			if ((now.Month == 4) && (now.Day == 1)) {
 				try {
-					CultureInfo.DefaultThreadCurrentCulture = CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.CreateSpecificCulture("qps-Ploc");
+					CultureInfo.DefaultThreadCurrentCulture = CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.CreateSpecificCulture(SharedInfo.LolcatCultureName);
 				} catch (Exception e) {
 					ASF.ArchiLogger.LogGenericDebuggingException(e);
 

ArchiSteamFarm/IPC/Integration/LocalizationMiddleware.cs

@@ -0,0 +1,84 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2021 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Threading.Tasks;
+using JetBrains.Annotations;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Headers;
+using Microsoft.Extensions.Primitives;
+using Microsoft.Net.Http.Headers;
+
+namespace ArchiSteamFarm.IPC.Integration {
+	[SuppressMessage("ReSharper", "ClassNeverInstantiated.Global")]
+	internal sealed class LocalizationMiddleware {
+		internal static readonly ImmutableDictionary<string, string> CultureConversions = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase) { { "lol-US", SharedInfo.LolcatCultureName }, { "sr-CS", "sr-Latn" } }.ToImmutableDictionary();
+
+		private readonly RequestDelegate Next;
+
+		public LocalizationMiddleware(RequestDelegate next) => Next = next ?? throw new ArgumentNullException(nameof(next));
+
+		[UsedImplicitly]
+		public async Task InvokeAsync(HttpContext context) {
+			if (context == null) {
+				throw new ArgumentNullException(nameof(context));
+			}
+
+			RequestHeaders headers = context.Request.GetTypedHeaders();
+
+			IList<StringWithQualityHeaderValue>? acceptLanguageHeader = headers.AcceptLanguage;
+
+			if ((acceptLanguageHeader == null) || (acceptLanguageHeader.Count == 0)) {
+				await Next(context).ConfigureAwait(false);
+
+				return;
+			}
+
+			bool valuesChanged = false;
+
+			for (int i = 0; i < acceptLanguageHeader.Count; i++) {
+				StringSegment language = acceptLanguageHeader[i].Value;
+
+				if (!language.HasValue || string.IsNullOrEmpty(language.Value)) {
+					continue;
+				}
+
+				if (!CultureConversions.TryGetValue(language.Value, out string? replacement) || string.IsNullOrEmpty(replacement)) {
+					continue;
+				}
+
+				acceptLanguageHeader[i] = StringWithQualityHeaderValue.Parse(replacement);
+				valuesChanged = true;
+			}
+
+			if (valuesChanged) {
+				// The getter returns a temporary collection; To make sure our changes are persisted, we need to assign it back
+				headers.AcceptLanguage = acceptLanguageHeader;
+			}
+
+			await Next(context).ConfigureAwait(false);
+		}
+	}
+}

ArchiSteamFarm/IPC/Startup.cs

@@ -27,6 +27,7 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Net;
 using System.Reflection;
 using ArchiSteamFarm.Core;
@@ -140,6 +141,7 @@ namespace ArchiSteamFarm.IPC {
 				}
 			);
 
+			app.UseMiddleware<LocalizationMiddleware>();
 			app.UseRequestLocalization();
 
 			// Use routing for our API controllers, this should be called once we're done with all the static files mess
@@ -222,7 +224,9 @@ namespace ArchiSteamFarm.IPC {
 #endif
 				static options => {
 					// We do not set the DefaultRequestCulture here, because it will default to Thread.CurrentThread.CurrentCulture in this case, which is set when loading GlobalConfig
-					options.SupportedUICultures = options.SupportedCultures = CultureInfo.GetCultures(CultureTypes.AllCultures);
+
+					List<CultureInfo> supportedCultures = CultureInfo.GetCultures(CultureTypes.AllCultures).Append(CultureInfo.CreateSpecificCulture(SharedInfo.LolcatCultureName)).ToList();
+					options.SupportedUICultures = options.SupportedCultures = supportedCultures;
 
 					// The default checks the URI and cookies and only then for headers; ASFs IPC does not use either of the higher priority mechanisms anywhere else and we don't want to start here.
 					options.RequestCultureProviders = new List<IRequestCultureProvider> { new AcceptLanguageHeaderRequestCultureProvider() };

ArchiSteamFarm/SharedInfo.cs

@@ -57,6 +57,7 @@ namespace ArchiSteamFarm {
 		internal const string LicenseName = "Apache 2.0";
 		internal const string LicenseURL = "https://www.apache.org/licenses/LICENSE-2.0";
 		internal const string LogFile = "log.txt";
+		internal const string LolcatCultureName = "qps-Ploc";
 		internal const string MobileAuthenticatorExtension = ".maFile";
 		internal const string PluginsDirectory = "plugins";
 		internal const string ProjectURL = "https://github.com/" + GithubRepo;