🎂 ForwardProxyView + HotkeysView + OnlineConfigView + VersionUpdatePromptView

- Infrastructure: use one HttpClient instance throughout the lifecycle
- Version update: rewrite the update service and add update prompt window
- Server sharing: add copy link button
- Dependencies: add ReactiveUI.Events.WPF, ReactiveUI.Fody, ReactiveUI.Validation, WPFLocalizeExtension, MdXaml

Author: database64128

shadowsocks-csharp/Controller/Service/GeositeUpdater.cs

@@ -35,8 +35,6 @@ public static class GeositeUpdater
 
         private static readonly string DATABASE_PATH = Utils.GetTempPath("dlc.dat");
 
-        private static HttpClientHandler httpClientHandler;
-        private static HttpClient httpClient;
         private static readonly string GEOSITE_URL = "https://github.com/v2fly/domain-list-community/raw/release/dlc.dat";
         private static readonly string GEOSITE_SHA256SUM_URL = "https://github.com/v2fly/domain-list-community/raw/release/dlc.dat.sha256sum";
         private static byte[] geositeDB;
@@ -82,30 +80,15 @@ public static async Task UpdatePACFromGeosite()
             SHA256 mySHA256 = SHA256.Create();
             var config = Program.MainController.GetCurrentConfiguration();
             bool blacklist = config.geositePreferDirect;
-            
+            var httpClient = Program.MainController.GetHttpClient();
+
             if (!string.IsNullOrWhiteSpace(config.geositeUrl))
             {
                 logger.Info("Found custom Geosite URL in config file");
                 geositeUrl = config.geositeUrl;
             }
             logger.Info($"Checking Geosite from {geositeUrl}");
 
-            // use System.Net.Http.HttpClient to download GeoSite db.
-            // NASTY workaround: new HttpClient every update
-            // because we can't change proxy on existing socketsHttpHandler instance
-            httpClientHandler = new HttpClientHandler();
-            httpClient = new HttpClient(httpClientHandler);
-            if (!string.IsNullOrWhiteSpace(config.userAgentString))
-                httpClient.DefaultRequestHeaders.Add("User-Agent", config.userAgentString);
-            if (config.enabled)
-            {
-                httpClientHandler.Proxy = new WebProxy(
-                    config.isIPv6Enabled
-                    ? $"[{IPAddress.IPv6Loopback}]"
-                    : IPAddress.Loopback.ToString(),
-                    config.localPort);
-            }
-
             try
             {
                 // download checksum first
@@ -154,19 +137,6 @@ public static async Task UpdatePACFromGeosite()
             {
                 Error?.Invoke(null, new ErrorEventArgs(ex));
             }
-            finally
-            {
-                if (httpClientHandler != null)
-                {
-                    httpClientHandler.Dispose();
-                    httpClientHandler = null;
-                }
-                if (httpClient != null)
-                {
-                    httpClient.Dispose();
-                    httpClient = null;
-                }
-            }
         }
 
         /// <summary>

shadowsocks-csharp/Controller/Service/OnlineConfigResolver.cs

@@ -11,28 +11,15 @@ namespace Shadowsocks.Controller.Service
 {
     public class OnlineConfigResolver
     {
-        public static async Task<List<Server>> GetOnline(string url, string userAgentString, IWebProxy proxy = null)
+        public static async Task<List<Server>> GetOnline(string url)
         {
-            var httpClientHandler = new HttpClientHandler()
-            {
-                Proxy = proxy
-            };
-            var httpClient = new HttpClient(httpClientHandler)
-            {
-                Timeout = TimeSpan.FromSeconds(15)
-            };
-            if (!string.IsNullOrWhiteSpace(userAgentString))
-                httpClient.DefaultRequestHeaders.Add("User-Agent", userAgentString);
-
+            var httpClient = Program.MainController.GetHttpClient();
             string server_json = await httpClient.GetStringAsync(url);
-
             var servers = server_json.GetServers();
-
             foreach (var server in servers)
             {
                 server.group = url;
             }
-
             return servers.ToList();
         }
     }

shadowsocks-csharp/Controller/Service/TCPRelay.cs

@@ -191,7 +191,7 @@ public AsyncSession(AsyncSession session, T state) : base(session.Remote)
         public DateTime lastActivity;
 
         private readonly ShadowsocksController _controller;
-        private readonly ProxyConfig _config;
+        private readonly ForwardProxyConfig _config;
         private readonly Socket _connection;
 
         private IEncryptor _encryptor;
@@ -665,10 +665,10 @@ private void StartConnect()
                 {
                     switch (_config.proxyType)
                     {
-                        case ProxyConfig.PROXY_SOCKS5:
+                        case ForwardProxyConfig.PROXY_SOCKS5:
                             remote = new Socks5Proxy();
                             break;
-                        case ProxyConfig.PROXY_HTTP:
+                        case ForwardProxyConfig.PROXY_HTTP:
                             remote = new HttpProxy();
                             break;
                         default: