5️⃣ Update to `net5.0` and mass cleanups

Shadowsocks.Interop/Settings/InteropSettings.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shadowsocks.Interop.Settings
+{
+    public class InteropSettings
+    {
+        public string SsRustPath { get; set; }
+        public string V2RayCorePath { get; set; }
+
+        public InteropSettings()
+        {
+            SsRustPath = "";
+            V2RayCorePath = "";
+        }
+    }
+}

Shadowsocks.Interop/Shadowsocks.Interop.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Shadowsocks.Interop/SsRust/Config.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shadowsocks.Interop.SsRust
+{
+    public class Config
+    {
+        public Config()
+        {
+
+        }
+    }
+}

Shadowsocks.Interop/V2Ray/Config.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shadowsocks.Interop.V2Ray
+{
+    public class Config
+    {
+        public Config()
+        {
+
+        }
+    }
+}

Shadowsocks.Net/Settings/NetSettings.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Shadowsocks.Net.Settings
+{
+    public class NetSettings
+    {
+        public bool EnableSocks5 { get; set; }
+        public bool EnableHttp { get; set; }
+        public string Socks5ListeningAddress { get; set; }
+        public string HttpListeningAddress { get; set; }
+        public int Socks5ListeningPort { get; set; }
+        public int HttpListeningPort { get; set; }
+        
+        public NetSettings()
+        {
+            EnableSocks5 = true;
+            EnableHttp = true;
+            Socks5ListeningAddress = "::1";
+            HttpListeningAddress = "::1";
+            Socks5ListeningPort = 1080;
+            HttpListeningPort = 1080;
+        }
+    }
+}

Shadowsocks.Net/Shadowsocks.Net.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

Shadowsocks.PAC/GeositeUpdater.cs

@@ -25,8 +25,6 @@ namespace Shadowsocks.PAC
     {
         public event EventHandler<GeositeResultEventArgs>? UpdateCompleted;
 
-        public event ErrorEventHandler? Error;
-
         private readonly string DATABASE_PATH;
 
         private readonly string GEOSITE_URL = "https://github.com/v2fly/domain-list-community/raw/release/dlc.dat";
@@ -65,7 +63,6 @@ namespace Shadowsocks.PAC
         public void ResetEvent()
         {
             UpdateCompleted = null;
-            Error = null;
         }
 
         public async Task UpdatePACFromGeosite(PACSettings pACSettings)
@@ -127,9 +124,9 @@ namespace Shadowsocks.PAC
                 bool pacFileChanged = MergeAndWritePACFile(pACSettings.GeositeDirectGroups, pACSettings.GeositeProxiedGroups, blacklist);
                 UpdateCompleted?.Invoke(null, new GeositeResultEventArgs(pacFileChanged));
             }
-            catch (Exception ex)
+            catch (Exception e)
             {
-                Error?.Invoke(null, new ErrorEventArgs(ex));
+                this.Log().Error(e, "An error occurred while updating PAC.");
             }
         }
 

Shadowsocks.PAC/PACSettings.cs

@@ -16,6 +16,7 @@ namespace Shadowsocks.PAC
             RegeneratePacOnVersionUpdate = true;
             CustomPACUrl = "";
             CustomGeositeUrl = "";
+            CustomGeositeSha256SumUrl = "";
             GeositeDirectGroups = new List<string>()
             {
                 "private",
@@ -67,6 +68,12 @@ namespace Shadowsocks.PAC
         /// </summary>
         public string CustomGeositeUrl { get; set; }
 
+        /// <summary>
+        /// Specifies the custom Geosite database's corresponding SHA256 checksum download URL.
+        /// Leave empty to disable checksum verification for your custom Geosite database.
+        /// </summary>
+        public string CustomGeositeSha256SumUrl { get; set; }
+
         /// <summary>
         /// A list of Geosite groups
         /// that we use direct connection for.

Shadowsocks.PAC/Shadowsocks.PAC.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 

Shadowsocks.Protobuf/Shadowsocks.Protobuf.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

Shadowsocks.WPF/Behaviors/OnlineConfigResolver.cs

@@ -1,67 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Newtonsoft.Json.Linq;
-using Shadowsocks.Models;
-
-namespace Shadowsocks.WPF.Behaviors
-{
-    public class OnlineConfigResolver
-    {
-        public static async Task<List<Server>> GetOnline(string url)
-        {
-            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();
-        }
-    }
-
-    internal static class OnlineConfigResolverEx
-    {
-        private static readonly string[] BASIC_FORMAT = new[] { "server", "server_port", "password", "method" };
-
-        private static readonly IEnumerable<Server> EMPTY_SERVERS = Array.Empty<Server>();
-
-        internal static IEnumerable<Server> GetServers(this string json) =>
-            JToken.Parse(json).SearchJToken().AsEnumerable();
-
-        private static IEnumerable<Server> SearchJArray(JArray array) =>
-            array == null ? EMPTY_SERVERS : array.SelectMany(SearchJToken).ToList();
-
-        private static IEnumerable<Server> SearchJObject(JObject obj)
-        {
-            if (obj == null)
-                return EMPTY_SERVERS;
-
-            if (BASIC_FORMAT.All(field => obj.ContainsKey(field)))
-                return new[] { obj.ToObject<Server>() };
-
-            var servers = new List<Server>();
-            foreach (var kv in obj)
-            {
-                var token = kv.Value;
-                servers.AddRange(SearchJToken(token));
-            }
-            return servers;
-        }
-
-        private static IEnumerable<Server> SearchJToken(this JToken token)
-        {
-            switch (token.Type)
-            {
-                default:
-                    return Array.Empty<Server>();
-                case JTokenType.Object:
-                    return SearchJObject(token as JObject);
-                case JTokenType.Array:
-                    return SearchJArray(token as JArray);
-            }
-        }
-    }
-}

Shadowsocks.WPF/Behaviors/Utilities.cs

@@ -1,125 +0,0 @@
-using Microsoft.Win32;
-using NLog;
-using System;
-using System.Diagnostics;
-using System.Drawing;
-using System.IO;
-using System.Runtime.InteropServices;
-using System.Windows.Forms;
-using ZXing;
-using ZXing.Common;
-using ZXing.QrCode;
-
-namespace Shadowsocks.WPF.Behaviors
-{
-    public static class Utilities
-    {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
-        private static string _tempPath = null;
-
-        // return path to store temporary files
-        public static string GetTempPath()
-        {
-            if (_tempPath == null)
-            {
-                bool isPortableMode = Configuration.Load().portableMode;
-                try
-                {
-                    if (isPortableMode)
-                    {
-                        _tempPath = Directory.CreateDirectory("ss_win_temp").FullName;
-                        // don't use "/", it will fail when we call explorer /select xxx/ss_win_temp\xxx.log
-                    }
-                    else
-                    {
-                        _tempPath = Directory.CreateDirectory(Path.Combine(Path.GetTempPath(), @"Shadowsocks\ss_win_temp_" + Program.ExecutablePath.GetHashCode())).FullName;
-                    }
-                }
-                catch (Exception e)
-                {
-                    logger.Error(e);
-                    throw;
-                }
-            }
-            return _tempPath;
-        }
-
-        // return a full path with filename combined which pointed to the temporary directory
-        public static string GetTempPath(string filename) => Path.Combine(GetTempPath(), filename);
-
-        public static string ScanQRCodeFromScreen()
-        {
-            foreach (Screen screen in Screen.AllScreens)
-            {
-                using (Bitmap fullImage = new Bitmap(screen.Bounds.Width,
-                                                screen.Bounds.Height))
-                {
-                    using (Graphics g = Graphics.FromImage(fullImage))
-                    {
-                        g.CopyFromScreen(screen.Bounds.X,
-                                         screen.Bounds.Y,
-                                         0, 0,
-                                         fullImage.Size,
-                                         CopyPixelOperation.SourceCopy);
-                    }
-                    int maxTry = 10;
-                    for (int i = 0; i < maxTry; i++)
-                    {
-                        int marginLeft = (int)((double)fullImage.Width * i / 2.5 / maxTry);
-                        int marginTop = (int)((double)fullImage.Height * i / 2.5 / maxTry);
-                        Rectangle cropRect = new Rectangle(marginLeft, marginTop, fullImage.Width - marginLeft * 2, fullImage.Height - marginTop * 2);
-                        Bitmap target = new Bitmap(screen.Bounds.Width, screen.Bounds.Height);
-
-                        double imageScale = (double)screen.Bounds.Width / (double)cropRect.Width;
-                        using (Graphics g = Graphics.FromImage(target))
-                        {
-                            g.DrawImage(fullImage, new Rectangle(0, 0, target.Width, target.Height),
-                                            cropRect,
-                                            GraphicsUnit.Pixel);
-                        }
-                        var source = new BitmapLuminanceSource(target);
-                        var bitmap = new BinaryBitmap(new HybridBinarizer(source));
-                        QRCodeReader reader = new QRCodeReader();
-                        var result = reader.decode(bitmap);
-                        if (result != null)
-                            return result.Text;
-                    }
-                }
-            }
-            return null;
-        }
-
-        public static void OpenInBrowser(string url)
-        {
-            try
-            {
-                Process.Start(url);
-            }
-            catch
-            {
-                // hack because of this: https://github.com/dotnet/corefx/issues/10361
-                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-                {
-                    Process.Start(new ProcessStartInfo(url)
-                    {
-                        UseShellExecute = true,
-                        Verb = "open"
-                    });
-                }
-                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-                {
-                    Process.Start("xdg-open", url);
-                }
-                else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-                {
-                    Process.Start("open", url);
-                }
-                else
-                {
-                    throw;
-                }
-            }
-        }
-    }
-}

Shadowsocks.WPF/Localization/LocalizationProvider.cs

@@ -7,6 +7,6 @@ namespace Shadowsocks.WPF.Localization
     {
         private static readonly string CallingAssemblyName = Assembly.GetCallingAssembly().GetName().Name;
 
-        public T GetLocalizedValue<T>(string key) => LocExtension.GetLocalizedValue<T>($"{CallingAssemblyName}:Strings:{key}");
+        public static T GetLocalizedValue<T>(string key) => LocExtension.GetLocalizedValue<T>($"{CallingAssemblyName}:Strings:{key}");
     }
 }

Shadowsocks.WPF/Models/AppSettings.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Shadowsocks.WPF.Models
+{
+    public class AppSettings
+    {
+        public bool StartOnBoot { get; set; }
+        public bool AssociateSsLinks { get; set; }
+        public bool VersionUpdateCheckForPrerelease { get; set; }
+        public string SkippedUpdateVersion { get; set; }
+
+        public AppSettings()
+        {
+            StartOnBoot = false;
+            AssociateSsLinks = false;
+            VersionUpdateCheckForPrerelease = false;
+            SkippedUpdateVersion = "";
+        }
+    }
+}

Shadowsocks.WPF/Models/Server.cs

@@ -1,252 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.Specialized;
-using System.Text;
-using System.Web;
-using Shadowsocks.Controller;
-using System.Text.RegularExpressions;
-using System.Linq;
-using Newtonsoft.Json;
-using System.ComponentModel;
-
-namespace Shadowsocks.WPF.Models
-{
-    [Serializable]
-    public class Server
-    {
-        public const string DefaultMethod = "chacha20-ietf-poly1305";
-        public const int DefaultPort = 8388;
-
-        #region ParseLegacyURL
-        private static readonly Regex UrlFinder = new Regex(@"ss://(?<base64>[A-Za-z0-9+-/=_]+)(?:#(?<tag>\S+))?", RegexOptions.IgnoreCase);
-        private static readonly Regex DetailsParser = new Regex(@"^((?<method>.+?):(?<password>.*)@(?<hostname>.+?):(?<port>\d+?))$", RegexOptions.IgnoreCase);
-        #endregion ParseLegacyURL
-
-        private const int DefaultServerTimeoutSec = 5;
-        public const int MaxServerTimeoutSec = 20;
-
-        public string server;
-        public int server_port;
-        public string password;
-        public string method;
-
-        // optional fields
-        [DefaultValue("")]
-        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate)]
-        public string plugin;
-        [DefaultValue("")]
-        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate)]
-        public string plugin_opts;
-        [DefaultValue("")]
-        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate)]
-        public string plugin_args;
-        [DefaultValue("")]
-        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate)]
-        public string remarks;
-
-        [DefaultValue("")]
-        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate)]
-        public string group;
-
-        public int timeout;
-
-        public override int GetHashCode()
-        {
-            return server.GetHashCode() ^ server_port;
-        }
-
-        public override bool Equals(object obj) => obj is Server o2 && server == o2.server && server_port == o2.server_port;
-
-        public override string ToString()
-        {
-            if (string.IsNullOrEmpty(server))
-            {
-                return I18N.GetString("New server");
-            }
-
-            string serverStr = $"{FormalHostName}:{server_port}";
-            return string.IsNullOrEmpty(remarks)
-                ? serverStr
-                : $"{remarks} ({serverStr})";
-        }
-
-        public string GetURL(bool legacyUrl = false)
-        {
-            if (legacyUrl && string.IsNullOrWhiteSpace(plugin))
-            {
-                // For backwards compatiblity, if no plugin, use old url format
-                string p = $"{method}:{password}@{server}:{server_port}";
-                string base64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(p));
-                return string.IsNullOrEmpty(remarks)
-                    ? $"ss://{base64}"
-                    : $"ss://{base64}#{HttpUtility.UrlEncode(remarks, Encoding.UTF8)}";
-            }
-
-            UriBuilder u = new UriBuilder("ss", null);
-            string b64 = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{method}:{password}"));
-            u.UserName = b64.Replace('+', '-').Replace('/', '_').TrimEnd('=');
-            u.Host = server;
-            u.Port = server_port;
-            u.Fragment = HttpUtility.UrlEncode(remarks, Encoding.UTF8);
-
-            if (!string.IsNullOrWhiteSpace(plugin))
-            {
-                NameValueCollection param = HttpUtility.ParseQueryString("");
-
-                string pluginPart = plugin;
-                if (!string.IsNullOrWhiteSpace(plugin_opts))
-                {
-                    pluginPart += ";" + plugin_opts;
-                }
-                param["plugin"] = pluginPart;
-                u.Query = param.ToString();
-            }
-
-            return u.ToString();
-        }
-
-        [JsonIgnore]
-        public string FormalHostName
-        {
-            get
-            {
-                // CheckHostName() won't do a real DNS lookup
-                return (Uri.CheckHostName(server)) switch
-                {
-                    // Add square bracket when IPv6 (RFC3986)
-                    UriHostNameType.IPv6 => $"[{server}]",
-                    // IPv4 or domain name
-                    _ => server,
-                };
-            }
-        }
-
-        public Server()
-        {
-            server = "";
-            server_port = DefaultPort;
-            method = DefaultMethod;
-            plugin = "";
-            plugin_opts = "";
-            plugin_args = "";
-            password = "";
-            remarks = "";
-            timeout = DefaultServerTimeoutSec;
-        }
-
-        private static Server ParseLegacyURL(string ssURL)
-        {
-            var match = UrlFinder.Match(ssURL);
-            if (!match.Success)
-                return null;
-
-            Server server = new Server();
-            var base64 = match.Groups["base64"].Value.TrimEnd('/');
-            var tag = match.Groups["tag"].Value;
-            if (!string.IsNullOrEmpty(tag))
-            {
-                server.remarks = HttpUtility.UrlDecode(tag, Encoding.UTF8);
-            }
-            Match details;
-            try
-            {
-                details = DetailsParser.Match(Encoding.UTF8.GetString(Convert.FromBase64String(
-                base64.PadRight(base64.Length + (4 - base64.Length % 4) % 4, '='))));
-            }
-            catch (FormatException)
-            {
-                return null;
-            }
-            if (!details.Success)
-                return null;
-            server.method = details.Groups["method"].Value;
-            server.password = details.Groups["password"].Value;
-            server.server = details.Groups["hostname"].Value;
-            server.server_port = int.Parse(details.Groups["port"].Value);
-            return server;
-        }
-
-        public static Server ParseURL(string serverUrl)
-        {
-            string _serverUrl = serverUrl.Trim();
-            if (!_serverUrl.StartsWith("ss://", StringComparison.InvariantCultureIgnoreCase))
-            {
-                return null;
-            }
-
-            Server legacyServer = ParseLegacyURL(serverUrl);
-            if (legacyServer != null)   //legacy
-            {
-                return legacyServer;
-            }
-            else   //SIP002
-            {
-                Uri parsedUrl;
-                try
-                {
-                    parsedUrl = new Uri(serverUrl);
-                }
-                catch (UriFormatException)
-                {
-                    return null;
-                }
-                Server server = new Server
-                {
-                    remarks = HttpUtility.UrlDecode(parsedUrl.GetComponents(
-                        UriComponents.Fragment, UriFormat.Unescaped), Encoding.UTF8),
-                    server = parsedUrl.IdnHost,
-                    server_port = parsedUrl.Port,
-                };
-
-                // parse base64 UserInfo
-                string rawUserInfo = parsedUrl.GetComponents(UriComponents.UserInfo, UriFormat.Unescaped);
-                string base64 = rawUserInfo.Replace('-', '+').Replace('_', '/');    // Web-safe base64 to normal base64
-                string userInfo;
-                try
-                {
-                    userInfo = Encoding.UTF8.GetString(Convert.FromBase64String(
-                    base64.PadRight(base64.Length + (4 - base64.Length % 4) % 4, '=')));
-                }
-                catch (FormatException)
-                {
-                    return null;
-                }
-                string[] userInfoParts = userInfo.Split(new char[] { ':' }, 2);
-                if (userInfoParts.Length != 2)
-                {
-                    return null;
-                }
-                server.method = userInfoParts[0];
-                server.password = userInfoParts[1];
-
-                NameValueCollection queryParameters = HttpUtility.ParseQueryString(parsedUrl.Query);
-                string[] pluginParts = (queryParameters["plugin"] ?? "").Split(new[] { ';' }, 2);
-                if (pluginParts.Length > 0)
-                {
-                    server.plugin = pluginParts[0] ?? "";
-                }
-
-                if (pluginParts.Length > 1)
-                {
-                    server.plugin_opts = pluginParts[1] ?? "";
-                }
-
-                return server;
-            }
-        }
-
-        public static List<Server> GetServers(string ssURL)
-        {
-            return ssURL
-                .Split('\r', '\n', ' ')
-                .Select(u => ParseURL(u))
-                .Where(s => s != null)
-                .ToList();
-        }
-
-        public string Identifier()
-        {
-            return server + ':' + server_port;
-        }
-    }
-}

Shadowsocks.WPF/Models/Settings.cs

@@ -1,3 +1,7 @@
+using Shadowsocks.Interop.Settings;
+using Shadowsocks.Models;
+using Shadowsocks.Net.Settings;
+using Shadowsocks.PAC;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -6,11 +10,23 @@ namespace Shadowsocks.WPF.Models
 {
     public class Settings
     {
+        public AppSettings App { get; set; }
+
+        public InteropSettings Interop { get; set; }
+        
+        public NetSettings Net { get; set; }
+
+        public PACSettings PAC { get; set; }
+        
+        public List<Group> Groups { get; set; }
+        
         public Settings()
         {
-
+            App = new AppSettings();
+            Interop = new InteropSettings();
+            Net = new NetSettings();
+            PAC = new PACSettings();
+            Groups = new List<Group>();
         }
-
-
     }
 }

Shadowsocks.WPF/Properties/PublishProfiles/FolderProfile.pubxml

@@ -6,9 +6,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
   <PropertyGroup>
     <Configuration>Release</Configuration>
     <Platform>Any CPU</Platform>
-    <PublishDir>bin\Release\netcoreapp3.1\publish\</PublishDir>
+    <PublishDir>bin\Release\net5.0-windows\publish\</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
-    <SelfContained>false</SelfContained>
   </PropertyGroup>
 </Project>

Shadowsocks.WPF/Properties/PublishProfiles/FolderProfile.pubxml.user

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-https://go.microsoft.com/fwlink/?LinkID=208121. 
--->
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-</Project>

Shadowsocks.WPF/Properties/PublishProfiles/win-arm.pubxml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net5.0-windows\win-arm\publish\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <TargetFramework>net5.0-windows</TargetFramework>
+    <RuntimeIdentifier>win-arm</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishSingleFile>True</PublishSingleFile>
+    <PublishReadyToRun>False</PublishReadyToRun>
+    <PublishTrimmed>True</PublishTrimmed>
+  </PropertyGroup>
+</Project>

Shadowsocks.WPF/Properties/PublishProfiles/win-x64.pubxml

@@ -6,9 +6,9 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
   <PropertyGroup>
     <Configuration>Release</Configuration>
     <Platform>Any CPU</Platform>
-    <PublishDir>bin\Release\netcoreapp3.1\publish\</PublishDir>
+    <PublishDir>bin\Release\net5.0-windows\win-x64\publish\</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0-windows</TargetFramework>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>True</PublishSingleFile>

Shadowsocks.WPF/Properties/PublishProfiles/win-x86.pubxml

@@ -6,9 +6,9 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
   <PropertyGroup>
     <Configuration>Release</Configuration>
     <Platform>Any CPU</Platform>
-    <PublishDir>bin\Release\netcoreapp3.1\publish\</PublishDir>
+    <PublishDir>bin\Release\net5.0-windows\win-x86\publish\</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0-windows</TargetFramework>
     <RuntimeIdentifier>win-x86</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>True</PublishSingleFile>

Shadowsocks.WPF/Services/OnlineConfigService.cs

@@ -0,0 +1,45 @@
+using Shadowsocks.Models;
+using Splat;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Net.Http.Json;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+namespace Shadowsocks.WPF.Services
+{
+    /// <summary>
+    /// The service for updating a group from an SIP008 online configuration source.
+    /// </summary>
+    public class OnlineConfigService
+    {
+        private Group _group;
+        private HttpClient _httpClient;
+        
+        public OnlineConfigService(Group group)
+        {
+            _group = group;
+            _httpClient = Locator.Current.GetService<HttpClient>();
+        }
+
+        /// <summary>
+        /// Updates the group from the configured online configuration source.
+        /// </summary>
+        /// <returns></returns>
+        public async Task Update()
+        {
+            // Download
+            var downloadedGroup = await _httpClient.GetFromJsonAsync<Group>(_group.OnlineConfigSource);
+            if (downloadedGroup == null)
+                throw new Exception("An error occurred.");
+            // Merge downloaded group into existing group
+            _group.Version = downloadedGroup.Version;
+            _group.BytesUsed = downloadedGroup.BytesUsed;
+            _group.BytesRemaining = downloadedGroup.BytesRemaining;
+            _group.Servers = downloadedGroup.Servers; // TODO: preserve per-server statistics
+        }
+    }
+}

Shadowsocks.WPF/Services/PortForwarder.cs

@@ -1,8 +1,8 @@
+using Shadowsocks.Net;
+using Splat;
 using System;
 using System.Net;
 using System.Net.Sockets;
-using NLog;
-using Shadowsocks.Net;
 
 namespace Shadowsocks.WPF.Services
 {
@@ -39,10 +39,8 @@ namespace Shadowsocks.WPF.Services
             return true;
         }
 
-        private class Handler
+        private class Handler : IEnableLogger
         {
-            private static Logger logger = LogManager.GetCurrentClassLogger();
-
             private byte[] _firstPacket;
             private int _firstPacketLength;
             private Socket _local;
@@ -74,7 +72,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -93,7 +91,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -110,7 +108,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -131,7 +129,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -158,7 +156,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -185,7 +183,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -204,7 +202,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -223,7 +221,7 @@ namespace Shadowsocks.WPF.Services
                 }
                 catch (Exception e)
                 {
-                    logger.LogUsefulException(e);
+                    this.Log().Error(e, "");
                     Close();
                 }
             }
@@ -255,7 +253,7 @@ namespace Shadowsocks.WPF.Services
                     }
                     catch (Exception e)
                     {
-                        logger.LogUsefulException(e);
+                        this.Log().Error(e, "");
                     }
                 }
                 if (_remote != null)
@@ -267,7 +265,7 @@ namespace Shadowsocks.WPF.Services
                     }
                     catch (SocketException e)
                     {
-                        logger.LogUsefulException(e);
+                        this.Log().Error(e, "");
                     }
                 }
             }

Shadowsocks.WPF/Services/PrivoxyRunner.cs

@@ -1,3 +1,6 @@
+using Shadowsocks.Net.Settings;
+using Shadowsocks.WPF.Utils;
+using Splat;
 using System;
 using System.Diagnostics;
 using System.IO;
@@ -5,42 +8,35 @@ using System.Linq;
 using System.Net;
 using System.Net.Sockets;
 using System.Text;
-using System.Windows.Forms;
-using NLog;
-using Shadowsocks.Model;
-using Shadowsocks.Properties;
-using Shadowsocks.Util;
-using Shadowsocks.Util.ProcessManagement;
 
 namespace Shadowsocks.WPF.Services
 {
-    class PrivoxyRunner
+    public class PrivoxyRunner : IEnableLogger
     {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
         private static int _uid;
-        private static string _uniqueConfigFile;
-        private Process _process;
+        private static string _uniqueConfigFile = "";
+        private Process? _process;
         private int _runningPort;
 
-        static PrivoxyRunner()
+        public PrivoxyRunner()
         {
             try
             {
-                _uid = Program.WorkingDirectory.GetHashCode(); // Currently we use ss's StartupPath to identify different Privoxy instance.
+                _uid = Utils.Utilities.WorkingDirectory.GetHashCode(); // Currently we use ss's StartupPath to identify different Privoxy instance.
                 _uniqueConfigFile = $"privoxy_{_uid}.conf";
 
-                FileManager.UncompressFile(Utils.GetTempPath("ss_privoxy.exe"), Resources.privoxy_exe);
+                FileManager.UncompressFile(Utils.Utilities.GetTempPath("ss_privoxy.exe"), Properties.Resources.privoxy_exe);
             }
             catch (IOException e)
             {
-                logger.LogUsefulException(e);
+                this.Log().Error(e, "An error occurred while starting Privoxy.");
+                _uniqueConfigFile = "";
             }
         }
 
         public int RunningPort => _runningPort;
 
-        public void Start(Configuration configuration)
+        public void Start(NetSettings netSettings)
         {
             if (_process == null)
             {
@@ -49,16 +45,13 @@ namespace Shadowsocks.WPF.Services
                 {
                     KillProcess(p);
                 }
-                string privoxyConfig = Resources.privoxy_conf;
-                _runningPort = GetFreePort(configuration.isIPv6Enabled);
-                privoxyConfig = privoxyConfig.Replace("__SOCKS_PORT__", configuration.localPort.ToString());
+                string privoxyConfig = Properties.Resources.privoxy_conf;
+                _runningPort = GetFreePort(netSettings);
+                privoxyConfig = privoxyConfig.Replace("__SOCKS_PORT__", netSettings.Socks5ListeningPort.ToString());
                 privoxyConfig = privoxyConfig.Replace("__PRIVOXY_BIND_PORT__", _runningPort.ToString());
-                privoxyConfig = configuration.isIPv6Enabled
-                    ? privoxyConfig.Replace("__PRIVOXY_BIND_IP__", configuration.shareOverLan ? "[::]" : "[::1]")
-                    .Replace("__SOCKS_HOST__", "[::1]")
-                    : privoxyConfig.Replace("__PRIVOXY_BIND_IP__", configuration.shareOverLan ? "0.0.0.0" : "127.0.0.1")
-                    .Replace("__SOCKS_HOST__", "127.0.0.1");
-                FileManager.ByteArrayToFile(Utils.GetTempPath(_uniqueConfigFile), Encoding.UTF8.GetBytes(privoxyConfig));
+                privoxyConfig = privoxyConfig.Replace("__PRIVOXY_BIND_IP__", $"[{netSettings.Socks5ListeningAddress}]")
+                    .Replace("__SOCKS_HOST__", "[::1]"); // TODO: make sure it's correct
+                FileManager.ByteArrayToFile(Utils.Utilities.GetTempPath(_uniqueConfigFile), Encoding.UTF8.GetBytes(privoxyConfig));
 
                 _process = new Process
                 {
@@ -67,7 +60,7 @@ namespace Shadowsocks.WPF.Services
                     {
                         FileName = "ss_privoxy.exe",
                         Arguments = _uniqueConfigFile,
-                        WorkingDirectory = Utils.GetTempPath(),
+                        WorkingDirectory = Utils.Utilities.GetTempPath(),
                         WindowStyle = ProcessWindowStyle.Hidden,
                         UseShellExecute = true,
                         CreateNoWindow = true
@@ -87,7 +80,7 @@ namespace Shadowsocks.WPF.Services
             }
         }
 
-        private static void KillProcess(Process p)
+        private void KillProcess(Process p)
         {
             try
             {
@@ -101,7 +94,7 @@ namespace Shadowsocks.WPF.Services
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                this.Log().Error(e, "An error occurred while stopping Privoxy.");
             }
         }
 
@@ -115,16 +108,16 @@ namespace Shadowsocks.WPF.Services
          * UID is hash of ss's location.
          */
 
-        private static bool IsChildProcess(Process process)
+        private bool IsChildProcess(Process process)
         {
             try
             {
                 /*
                  * Under PortableMode, we could identify it by the path of ss_privoxy.exe.
                  */
-                var path = process.MainModule.FileName;
+                var path = process.MainModule?.FileName;
 
-                return Utils.GetTempPath("ss_privoxy.exe").Equals(path);
+                return Utils.Utilities.GetTempPath("ss_privoxy.exe").Equals(path);
 
             }
             catch (Exception ex)
@@ -134,18 +127,18 @@ namespace Shadowsocks.WPF.Services
                  * are already dead, and that will cause exceptions here.
                  * We could simply ignore those exceptions.
                  */
-                logger.LogUsefulException(ex);
+                this.Log().Error(ex, "");
                 return false;
             }
         }
 
-        private int GetFreePort(bool isIPv6 = false)
+        private int GetFreePort(NetSettings netSettings)
         {
             int defaultPort = 8123;
             try
             {
                 // TCP stack please do me a favor
-                TcpListener l = new TcpListener(isIPv6 ? IPAddress.IPv6Loopback : IPAddress.Loopback, 0);
+                TcpListener l = new TcpListener(IPAddress.Parse(netSettings.Socks5ListeningAddress), 0);
                 l.Start();
                 var port = ((IPEndPoint)l.LocalEndpoint).Port;
                 l.Stop();
@@ -154,7 +147,7 @@ namespace Shadowsocks.WPF.Services
             catch (Exception e)
             {
                 // in case access denied
-                logger.LogUsefulException(e);
+                this.Log().Error(e, "");
                 return defaultPort;
             }
         }

Shadowsocks.WPF/Services/Sip003Plugin.cs

@@ -1,11 +1,10 @@
+using Shadowsocks.Models;
 using System;
 using System.Collections.Specialized;
 using System.Diagnostics;
 using System.IO;
 using System.Net;
 using System.Net.Sockets;
-using Shadowsocks.Model;
-using Shadowsocks.Util.ProcessManagement;
 
 namespace Shadowsocks.WPF.Services
 {
@@ -27,17 +26,17 @@ namespace Shadowsocks.WPF.Services
                 throw new ArgumentNullException(nameof(server));
             }
 
-            if (string.IsNullOrWhiteSpace(server.plugin))
+            if (string.IsNullOrWhiteSpace(server.Plugin))
             {
                 return null;
             }
 
             return new Sip003Plugin(
-                server.plugin,
-                server.plugin_opts,
+                server.Plugin,
+                server.PluginOpts,
                 server.plugin_args,
-                server.server,
-                server.server_port,
+                server.Host,
+                server.Port,
                 showPluginOutput);
         }
 
@@ -63,7 +62,7 @@ namespace Shadowsocks.WPF.Services
                     CreateNoWindow = !showPluginOutput,
                     ErrorDialog = false,
                     WindowStyle = ProcessWindowStyle.Hidden,
-                    WorkingDirectory = Program.WorkingDirectory ?? Environment.CurrentDirectory,
+                    WorkingDirectory = Utils.Utilities.WorkingDirectory ?? Environment.CurrentDirectory,
                     Environment =
                     {
                         ["SS_REMOTE_HOST"] = serverAddress,
@@ -106,11 +105,10 @@ namespace Shadowsocks.WPF.Services
                     //  https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/18d8fbe8-a967-4f1c-ae50-99ca8e491d2d
                     if (ex.NativeErrorCode == 0x00000002)
                     {
-                        throw new FileNotFoundException(I18N.GetString("Cannot find the plugin program file"), _pluginProcess.StartInfo.FileName, ex);
+                        throw new FileNotFoundException("Cannot find the plugin program file", _pluginProcess.StartInfo.FileName, ex);
                     }
-                    throw new ApplicationException(I18N.GetString("Plugin Program"), ex);
+                    throw new ApplicationException("Plugin Program", ex);
                 }
-                _pluginJob.AddProcess(_pluginProcess.Handle);
                 _started = true;
             }
 
@@ -162,7 +160,6 @@ namespace Shadowsocks.WPF.Services
                 try
                 {
                     _pluginProcess.Dispose();
-                    _pluginJob.Dispose();
                 }
                 catch (Exception) { }
 

Shadowsocks.WPF/Services/UpdateChecker.cs

@@ -1,23 +1,20 @@
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
-using System.Net;
 using System.Net.Http;
 using System.Reflection;
-using System.Text.RegularExpressions;
+using System.Text.Json;
 using System.Threading.Tasks;
 using System.Windows;
-using Newtonsoft.Json.Linq;
 using NLog;
-using Shadowsocks.Localization;
-using Shadowsocks.Model;
-using Shadowsocks.Util;
-using Shadowsocks.Views;
+using Shadowsocks.WPF.Localization;
+using Shadowsocks.WPF.Models;
+using Shadowsocks.WPF.Views;
+using Splat;
 
 namespace Shadowsocks.WPF.Services
 {
-    public class UpdateChecker
+    public class UpdateChecker : IEnableLogger
     {
         private readonly Logger logger;
         private readonly HttpClient httpClient;
@@ -25,24 +22,24 @@ namespace Shadowsocks.WPF.Services
         // https://developer.github.com/v3/repos/releases/
         private const string UpdateURL = "https://api.github.com/repos/shadowsocks/shadowsocks-windows/releases";
 
-        private Configuration _config;
-        private Window versionUpdatePromptWindow;
-        private JToken _releaseObject;
+        private Window? versionUpdatePromptWindow;
+        private JsonElement _releaseObject;
 
         public string NewReleaseVersion { get; private set; }
         public string NewReleaseZipFilename { get; private set; }
 
-        public event EventHandler CheckUpdateCompleted;
+        public event EventHandler? CheckUpdateCompleted;
 
-        public static readonly string Version = Assembly.GetEntryAssembly().GetName().Version.ToString();
+        public static readonly string Version = Assembly.GetEntryAssembly()?.GetName().Version?.ToString() ?? "5.0.0";
         private readonly Version _version;
 
         public UpdateChecker()
         {
             logger = LogManager.GetCurrentClassLogger();
-            httpClient = Program.MainController.GetHttpClient();
+            httpClient = Locator.Current.GetService<HttpClient>();
             _version = new Version(Version);
-            _config = Program.MainController.GetCurrentConfiguration();
+            NewReleaseVersion = "";
+            NewReleaseZipFilename = "";
         }
 
         /// <summary>
@@ -55,30 +52,33 @@ namespace Shadowsocks.WPF.Services
             // delay
             logger.Info($"Waiting for {millisecondsDelay}ms before checking for version update.");
             await Task.Delay(millisecondsDelay);
-            // update _config so we would know if the user checked or unchecked pre-release checks
-            _config = Program.MainController.GetCurrentConfiguration();
             // start
             logger.Info($"Checking for version update.");
+            var appSettings = Locator.Current.GetService<AppSettings>();
             try
             {
                 // list releases via API
-                var releasesListJsonString = await httpClient.GetStringAsync(UpdateURL);
+                var releasesListJsonStream = await httpClient.GetStreamAsync(UpdateURL);
                 // parse
-                var releasesJArray = JArray.Parse(releasesListJsonString);
-                foreach (var releaseObject in releasesJArray)
+                using (JsonDocument jsonDocument = await JsonDocument.ParseAsync(releasesListJsonStream))
                 {
-                    var releaseTagName = (string)releaseObject["tag_name"];
-                    var releaseVersion = new Version(releaseTagName);
-                    if (releaseTagName == _config.skippedUpdateVersion) // finished checking
-                        break;
-                    if (releaseVersion.CompareTo(_version) > 0 &&
-                        (!(bool)releaseObject["prerelease"] || _config.checkPreRelease && (bool)releaseObject["prerelease"])) // selected
+                    var releasesList = jsonDocument.RootElement;
+                    foreach (var releaseObject in releasesList.EnumerateArray())
                     {
-                        logger.Info($"Found new version {releaseTagName}.");
-                        _releaseObject = releaseObject;
-                        NewReleaseVersion = releaseTagName;
-                        AskToUpdate(releaseObject);
-                        return;
+                        var releaseTagName = releaseObject.GetProperty("tag_name").GetString();
+                        var releaseVersion = new Version(releaseTagName ?? "5.0.0");
+                        var releaseIsPrerelease = releaseObject.GetProperty("prerelease").GetBoolean();
+                        if (releaseTagName == appSettings.SkippedUpdateVersion) // finished checking
+                            break;
+                        if (releaseVersion.CompareTo(_version) > 0 &&
+                            (!releaseIsPrerelease || appSettings.VersionUpdateCheckForPrerelease && releaseIsPrerelease)) // selected
+                        {
+                            logger.Info($"Found new version {releaseTagName}.");
+                            _releaseObject = releaseObject;
+                            NewReleaseVersion = releaseTagName ?? "";
+                            AskToUpdate(releaseObject);
+                            return;
+                        }
                     }
                 }
                 logger.Info($"No new versions found.");
@@ -86,7 +86,7 @@ namespace Shadowsocks.WPF.Services
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                this.Log().Error(e, "An error occurred while checking for version updates.");
             }
         }
 
@@ -94,7 +94,7 @@ namespace Shadowsocks.WPF.Services
         /// Opens a window to show the update's information.
         /// </summary>
         /// <param name="releaseObject">The update release object.</param>
-        private void AskToUpdate(JToken releaseObject)
+        private void AskToUpdate(JsonElement releaseObject)
         {
             if (versionUpdatePromptWindow == null)
             {
@@ -113,7 +113,7 @@ namespace Shadowsocks.WPF.Services
             versionUpdatePromptWindow.Activate();
         }
 
-        private void VersionUpdatePromptWindow_Closed(object sender, EventArgs e)
+        private void VersionUpdatePromptWindow_Closed(object? sender, EventArgs e)
         {
             versionUpdatePromptWindow = null;
         }
@@ -126,14 +126,14 @@ namespace Shadowsocks.WPF.Services
         {
             try
             {
-                var assets = (JArray)_releaseObject["assets"];
+                var assets = _releaseObject.GetProperty("assets");
                 // download all assets
-                foreach (JObject asset in assets)
+                foreach (var asset in assets.EnumerateArray())
                 {
-                    var filename = (string)asset["name"];
-                    var browser_download_url = (string)asset["browser_download_url"];
+                    var filename = asset.GetProperty("name").GetString();
+                    var browser_download_url = asset.GetProperty("browser_download_url").GetString();
                     var response = await httpClient.GetAsync(browser_download_url);
-                    using (var downloadedFileStream = File.Create(Utils.GetTempPath(filename)))
+                    using (var downloadedFileStream = File.Create(Utils.Utilities.GetTempPath(filename)))
                         await response.Content.CopyToAsync(downloadedFileStream);
                     logger.Info($"Downloaded {filename}.");
                     // store .zip filename
@@ -143,11 +143,11 @@ namespace Shadowsocks.WPF.Services
                 logger.Info("Finished downloading.");
                 // notify user
                 CloseVersionUpdatePromptWindow();
-                Process.Start("explorer.exe", $"/select, \"{Utils.GetTempPath(NewReleaseZipFilename)}\"");
+                Process.Start("explorer.exe", $"/select, \"{Utils.Utilities.GetTempPath(NewReleaseZipFilename)}\"");
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                this.Log().Error(e, "An error occurred while downloading the version update.");
             }
         }
 
@@ -156,10 +156,13 @@ namespace Shadowsocks.WPF.Services
         /// </summary>
         public void SkipUpdate()
         {
-            var version = (string)_releaseObject["tag_name"] ?? "";
-            _config.skippedUpdateVersion = version;
-            Program.MainController.SaveSkippedUpdateVerion(version);
-            logger.Info($"The update {version} has been skipped and will be ignored next time.");
+            var appSettings = Locator.Current.GetService<AppSettings>();
+            if (_releaseObject.TryGetProperty("tag_name", out var tagNameJsonElement) && tagNameJsonElement.GetString() is string version)
+            {
+                appSettings.SkippedUpdateVersion = version;
+                // TODO: signal settings change
+                logger.Info($"The update {version} has been skipped and will be ignored next time.");
+            }
             CloseVersionUpdatePromptWindow();
         }
 

Shadowsocks.WPF/Shadowsocks.WPF.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
     <Authors>clowwindy &amp; community 2020</Authors>
     <PackageId>Shadowsocks.WPF</PackageId>
@@ -50,7 +50,7 @@
     <PackageReference Include="ReactiveUI.Fody" Version="12.1.5" />
     <PackageReference Include="ReactiveUI.Validation" Version="1.8.6" />
     <PackageReference Include="ReactiveUI.WPF" Version="12.1.5" />
-    <PackageReference Include="Splat.NLog" Version="9.6.1" />
+    <PackageReference Include="Splat.NLog" Version="9.7.1" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta1.20371.2" />
     <PackageReference Include="WPFLocalizeExtension" Version="3.8.0" />
     <PackageReference Include="ZXing.Net" Version="0.16.6" />
@@ -81,7 +81,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\Shadowsocks.Interop\Shadowsocks.Interop.csproj" />
     <ProjectReference Include="..\Shadowsocks.Net\Shadowsocks.Net.csproj" />
+    <ProjectReference Include="..\Shadowsocks.PAC\Shadowsocks.PAC.csproj" />
     <ProjectReference Include="..\Shadowsocks\Shadowsocks.csproj" />
   </ItemGroup>
 
@@ -113,4 +115,8 @@
     <Resource Include="Resources\ssw128.png" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Properties\PublishProfiles\" />
+  </ItemGroup>
+
 </Project>

Shadowsocks.WPF/Behaviors/AutoStartup.cs → Shadowsocks.WPF/Utils/AutoStartup.cs

@@ -1,36 +1,32 @@
+using Microsoft.Win32;
+using Splat;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Runtime.InteropServices;
-using Microsoft.Win32;
-using NLog;
-using Shadowsocks.Util;
 
-namespace Shadowsocks.WPF.Behaviors
+namespace Shadowsocks.WPF.Utils
 {
-    static class AutoStartup
+    public static class AutoStartup
     {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
-        // Don't use Application.ExecutablePath
-        // see https://stackoverflow.com/questions/12945805/odd-c-sharp-path-issue
-        
-        private static string Key = "Shadowsocks_" + Program.ExecutablePath.GetHashCode();
+        private static readonly string registryRunKey = @"Software\Microsoft\Windows\CurrentVersion\Run";
+        private static readonly string Key = "Shadowsocks_" + Utilities.ExecutablePath.GetHashCode();
 
         public static bool Set(bool enabled)
         {
             RegistryKey runKey = null;
             try
             {
-                runKey = Utils.OpenRegKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);
+                runKey = Registry.CurrentUser.CreateSubKey(registryRunKey, RegistryKeyPermissionCheck.ReadWriteSubTree);
                 if (runKey == null)
                 {
-                    logger.Error(@"Cannot find HKCU\Software\Microsoft\Windows\CurrentVersion\Run");
+                    LogHost.Default.Error(@"Cannot find HKCU\{registryRunKey}.");
                     return false;
                 }
                 if (enabled)
                 {
-                    runKey.SetValue(Key, Program.ExecutablePath);
+                    runKey.SetValue(Key, Process.GetCurrentProcess().MainModule?.FileName);
                 }
                 else
                 {
@@ -42,7 +38,7 @@ namespace Shadowsocks.WPF.Behaviors
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                LogHost.Default.Error(e, "An error occurred while setting auto startup registry entry.");
                 return false;
             }
             finally
@@ -55,7 +51,9 @@ namespace Shadowsocks.WPF.Behaviors
                         runKey.Dispose();
                     }
                     catch (Exception e)
-                    { logger.LogUsefulException(e); }
+                    {
+                        LogHost.Default.Error(e, "An error occurred while setting auto startup registry entry.");
+                    }
                 }
             }
         }
@@ -65,10 +63,10 @@ namespace Shadowsocks.WPF.Behaviors
             RegistryKey runKey = null;
             try
             {
-                runKey = Utils.OpenRegKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);
+                runKey = Registry.CurrentUser.CreateSubKey(registryRunKey, RegistryKeyPermissionCheck.ReadWriteSubTree);
                 if (runKey == null)
                 {
-                    logger.Error(@"Cannot find HKCU\Software\Microsoft\Windows\CurrentVersion\Run");
+                    LogHost.Default.Error(@"Cannot find HKCU\{registryRunKey}.");
                     return false;
                 }
                 var check = false;
@@ -80,10 +78,11 @@ namespace Shadowsocks.WPF.Behaviors
                         continue;
                     }
                     // Remove other startup keys with the same executable path. fixes #3011 and also assures compatibility with older versions
-                    if (Program.ExecutablePath.Equals(runKey.GetValue(valueName).ToString(), StringComparison.InvariantCultureIgnoreCase))
+                    if (Utilities.ExecutablePath.Equals(runKey.GetValue(valueName).ToString(), StringComparison.InvariantCultureIgnoreCase)
+                        is bool matchedDuplicate && matchedDuplicate)
                     {
                         runKey.DeleteValue(valueName);
-                        runKey.SetValue(Key, Program.ExecutablePath);
+                        runKey.SetValue(Key, Utilities.ExecutablePath);
                         check = true;
                     }
                 }
@@ -91,7 +90,7 @@ namespace Shadowsocks.WPF.Behaviors
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                LogHost.Default.Error(e, "An error occurred while checking auto startup registry entries.");
                 return false;
             }
             finally
@@ -104,7 +103,9 @@ namespace Shadowsocks.WPF.Behaviors
                         runKey.Dispose();
                     }
                     catch (Exception e)
-                    { logger.LogUsefulException(e); }
+                    {
+                        LogHost.Default.Error(e, "An error occurred while checking auto startup registry entries.");
+                    }
                 }
             }
         }
@@ -132,7 +133,7 @@ namespace Shadowsocks.WPF.Behaviors
             if (register && !Check())
             {
                 // escape command line parameter
-                string[] args = new List<string>(Program.Args)
+                string[] args = new List<string>(Environment.GetCommandLineArgs())
                     .Select(p => p.Replace("\"", "\\\""))                   // escape " to \"
                     .Select(p => p.IndexOf(" ") >= 0 ? "\"" + p + "\"" : p) // encapsule with "
                     .ToArray();
@@ -140,13 +141,13 @@ namespace Shadowsocks.WPF.Behaviors
                 // first parameter is process command line parameter
                 // needn't include the name of the executable in the command line
                 RegisterApplicationRestart(cmdline, (int)(ApplicationRestartFlags.RESTART_NO_CRASH | ApplicationRestartFlags.RESTART_NO_HANG));
-                logger.Debug("Register restart after system reboot, command line:" + cmdline);
+                LogHost.Default.Debug("Register restart after system reboot, command line:" + cmdline);
             }
             // requested unregister, which has no side effect
             else if (!register)
             {
                 UnregisterApplicationRestart();
-                logger.Debug("Unregister restart after system reboot");
+                LogHost.Default.Debug("Unregister restart after system reboot");
             }
         }
     }

Shadowsocks.WPF/Behaviors/FileManager.cs → Shadowsocks.WPF/Utils/FileManager.cs

@@ -1,15 +1,13 @@
-using NLog;
+using Splat;
 using System;
 using System.IO;
 using System.IO.Compression;
 using System.Text;
 
-namespace Shadowsocks.WPF.Behaviors
+namespace Shadowsocks.WPF.Utils
 {
     public static class FileManager
     {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
         public static bool ByteArrayToFile(string fileName, byte[] content)
         {
             try
@@ -20,7 +18,7 @@ namespace Shadowsocks.WPF.Behaviors
             }
             catch (Exception ex)
             {
-                logger.Error(ex);
+                LogHost.Default.Error(ex, "");
             }
             return false;
         }
@@ -60,7 +58,7 @@ namespace Shadowsocks.WPF.Behaviors
             }
             catch (Exception ex)
             {
-                logger.Error(ex);
+                LogHost.Default.Error(ex, "");
                 throw ex;
             }
         }

Shadowsocks.WPF/Behaviors/IPCService.cs → Shadowsocks.WPF/Utils/IPCService.cs

@@ -3,7 +3,7 @@ using System.IO.Pipes;
 using System.Net;
 using System.Text;
 
-namespace Shadowsocks.WPF.Behaviors
+namespace Shadowsocks.WPF.Utils
 {
     class RequestAddUrlEventArgs : EventArgs
     {
@@ -19,7 +19,7 @@ namespace Shadowsocks.WPF.Behaviors
     {
         private const int INT32_LEN = 4;
         private const int OP_OPEN_URL = 1;
-        private static readonly string PIPE_PATH = $"Shadowsocks\\{Program.ExecutablePath.GetHashCode()}";
+        private static readonly string PIPE_PATH = $"Shadowsocks\\{Utilities.ExecutablePath.GetHashCode()}";
 
         public event EventHandler<RequestAddUrlEventArgs> OpenUrlRequested;
 

Shadowsocks.WPF/Behaviors/ProtocolHandler.cs → Shadowsocks.WPF/Utils/ProtocolHandler.cs

@@ -1,15 +1,13 @@
 using Microsoft.Win32;
-using NLog;
+using Splat;
 using System;
 
-namespace Shadowsocks.WPF.Behaviors
+namespace Shadowsocks.WPF.Utils
 {
     static class ProtocolHandler
     {
         const string ssURLRegKey = @"SOFTWARE\Classes\ss";
 
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
         public static bool Set(bool enabled)
         {
             RegistryKey ssURLAssociation = null;
@@ -19,7 +17,7 @@ namespace Shadowsocks.WPF.Behaviors
                 ssURLAssociation = Registry.CurrentUser.CreateSubKey(ssURLRegKey, RegistryKeyPermissionCheck.ReadWriteSubTree);
                 if (ssURLAssociation == null)
                 {
-                    logger.Error(@"Failed to create HKCU\SOFTWARE\Classes\ss to register ss:// association.");
+                    LogHost.Default.Error(@"Failed to create HKCU\SOFTWARE\Classes\ss to register ss:// association.");
                     return false;
                 }
                 if (enabled)
@@ -27,19 +25,19 @@ namespace Shadowsocks.WPF.Behaviors
                     ssURLAssociation.SetValue("", "URL:Shadowsocks");
                     ssURLAssociation.SetValue("URL Protocol", "");
                     var shellOpen = ssURLAssociation.CreateSubKey("shell").CreateSubKey("open").CreateSubKey("command");
-                    shellOpen.SetValue("", $"{Program.ExecutablePath} --open-url %1");
-                    logger.Info(@"Successfully added ss:// association.");
+                    shellOpen.SetValue("", $"{Utilities.ExecutablePath} --open-url %1");
+                    LogHost.Default.Info(@"Successfully added ss:// association.");
                 }
                 else
                 {
                     Registry.CurrentUser.DeleteSubKeyTree(ssURLRegKey);
-                    logger.Info(@"Successfully removed ss:// association.");
+                    LogHost.Default.Info(@"Successfully removed ss:// association.");
                 }
                 return true;
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                LogHost.Default.Error(e, "An error occurred while setting ss:// association registry entries.");
                 return false;
             }
             finally
@@ -52,7 +50,9 @@ namespace Shadowsocks.WPF.Behaviors
                         ssURLAssociation.Dispose();
                     }
                     catch (Exception e)
-                    { logger.LogUsefulException(e); }
+                    {
+                        LogHost.Default.Error(e, "An error occurred while setting ss:// association registry entries.");
+                    }
                 }
             }
         }
@@ -70,11 +70,11 @@ namespace Shadowsocks.WPF.Behaviors
                 }
 
                 var shellOpen = ssURLAssociation.OpenSubKey("shell").OpenSubKey("open").OpenSubKey("command");
-                return (string)shellOpen.GetValue("") == $"{Program.ExecutablePath} --open-url %1";
+                return (string)shellOpen.GetValue("") == $"{Utilities.ExecutablePath} --open-url %1";
             }
             catch (Exception e)
             {
-                logger.LogUsefulException(e);
+                LogHost.Default.Error(e, "An error occurred while checking ss:// association registry entries.");
                 return false;
             }
             finally
@@ -87,7 +87,9 @@ namespace Shadowsocks.WPF.Behaviors
                         ssURLAssociation.Dispose();
                     }
                     catch (Exception e)
-                    { logger.LogUsefulException(e); }
+                    {
+                        LogHost.Default.Error(e, "An error occurred while checking ss:// association registry entries.");
+                    }
                 }
             }
         }

Shadowsocks.WPF/Behaviors/SystemProxy.cs → Shadowsocks.WPF/Utils/SystemProxy.cs

@@ -1,14 +1,11 @@
-using NLog;
 using Shadowsocks.Net.SystemProxy;
 using Shadowsocks.WPF.Services.SystemProxy;
 using System.Windows;
 
-namespace Shadowsocks.WPF.Behaviors
+namespace Shadowsocks.WPF.Utils
 {
     public static class SystemProxy
     {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
         public static void Update(Configuration config, bool forceDisable, PACServer pacSrv, bool noRetry = false)
         {
             bool global = config.global;

Shadowsocks.WPF/Utils/Utilities.cs

@@ -0,0 +1,117 @@
+using Shadowsocks.WPF.Models;
+using Splat;
+using System;
+using System.Diagnostics;
+using System.Drawing;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Windows;
+using ZXing;
+using ZXing.Common;
+using ZXing.QrCode;
+
+namespace Shadowsocks.WPF.Utils
+{
+    public static class Utilities
+    {
+        private static string _tempPath = null!;
+
+        public static readonly string ExecutablePath = Process.GetCurrentProcess().MainModule?.FileName ?? "";
+        public static readonly string WorkingDirectory = Path.GetDirectoryName(ExecutablePath) ?? "";
+
+        // return path to store temporary files
+        public static string GetTempPath()
+        {
+            if (_tempPath == null)
+            {
+                bool isPortableMode = false; // TODO: fix --profile-directory
+                try
+                {
+                    if (isPortableMode)
+                    {
+                        _tempPath = Directory.CreateDirectory("ss_win_temp").FullName;
+                        // don't use "/", it will fail when we call explorer /select xxx/ss_win_temp\xxx.log
+                    }
+                    else
+                    {
+                        _tempPath = Directory.CreateDirectory(Path.Combine(Path.GetTempPath(), @"Shadowsocks\ss_win_temp_" + ExecutablePath?.GetHashCode())).FullName;
+                    }
+                }
+                catch (Exception e)
+                {
+                    LogHost.Default.Error(e);
+                    throw;
+                }
+            }
+            return _tempPath;
+        }
+
+        // return a full path with filename combined which pointed to the temporary directory
+        public static string GetTempPath(string filename) => Path.Combine(GetTempPath(), filename);
+
+        public static string ScanQRCodeFromScreen()
+        {
+            var screenLeft = SystemParameters.VirtualScreenLeft;
+            var screenTop = SystemParameters.VirtualScreenTop;
+            var screenWidth = SystemParameters.VirtualScreenWidth;
+            var screenHeight = SystemParameters.VirtualScreenHeight;
+
+            using (Bitmap bmp = new Bitmap((int)screenWidth, (int)screenHeight))
+            {
+                using (Graphics g = Graphics.FromImage(bmp))
+                    g.CopyFromScreen((int)screenLeft, (int)screenTop, 0, 0, bmp.Size);
+                int maxTry = 10;
+                for (int i = 0; i < maxTry; i++)
+                {
+                    int marginLeft = (int)((double)bmp.Width * i / 2.5 / maxTry);
+                    int marginTop = (int)((double)bmp.Height * i / 2.5 / maxTry);
+                    Rectangle cropRect = new Rectangle(marginLeft, marginTop, bmp.Width - marginLeft * 2, bmp.Height - marginTop * 2);
+                    Bitmap target = new Bitmap((int)screenWidth, (int)screenHeight);
+
+                    double imageScale = screenWidth / cropRect.Width;
+                    using (Graphics g = Graphics.FromImage(target))
+                        g.DrawImage(bmp, new Rectangle(0, 0, target.Width, target.Height), cropRect, GraphicsUnit.Pixel);
+                    var source = new BitmapLuminanceSource(target);
+                    var bitmap = new BinaryBitmap(new HybridBinarizer(source));
+                    QRCodeReader reader = new QRCodeReader();
+                    var result = reader.decode(bitmap);
+                    if (result != null)
+                        return result.Text;
+                }
+            }
+            return "";
+        }
+
+        public static void OpenInBrowser(string url)
+        {
+            try
+            {
+                Process.Start(url);
+            }
+            catch
+            {
+                // hack because of this: https://github.com/dotnet/corefx/issues/10361
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                {
+                    Process.Start(new ProcessStartInfo(url)
+                    {
+                        UseShellExecute = true,
+                        Verb = "open"
+                    });
+                }
+                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+                {
+                    Process.Start("xdg-open", url);
+                }
+                else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                {
+                    Process.Start("open", url);
+                }
+                else
+                {
+                    throw;
+                }
+            }
+        }
+    }
+}

Shadowsocks.WPF/ViewModels/ForwardProxyViewModel.cs

@@ -1,10 +1,8 @@
-using ReactiveUI;
+using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using ReactiveUI.Validation.Extensions;
 using ReactiveUI.Validation.Helpers;
-using Shadowsocks.Controller;
-using Shadowsocks.Model;
-using Shadowsocks.View;
+using Shadowsocks.WPF.Models;
 using System.Linq;
 using System.Reactive;
 using System.Reactive.Linq;
@@ -15,10 +13,6 @@ namespace Shadowsocks.WPF.ViewModels
     {
         public ForwardProxyViewModel()
         {
-            _config = Program.MainController.GetCurrentConfiguration();
-            _controller = Program.MainController;
-            _menuViewController = Program.MenuController;
-
             if (!_config.proxy.useProxy)
                 NoProxy = true;
             else if (_config.proxy.proxyType == 0)
@@ -64,10 +58,6 @@ namespace Shadowsocks.WPF.ViewModels
             Cancel = ReactiveCommand.Create(_menuViewController.CloseForwardProxyWindow);
         }
 
-        private readonly Configuration _config;
-        private readonly ShadowsocksController _controller;
-        private readonly MenuViewController _menuViewController;
-
         public ValidationHelper AddressRule { get; }
         public ValidationHelper PortRule { get; }
         public ValidationHelper TimeoutRule { get; }

Shadowsocks.WPF/ViewModels/OnlineConfigViewModel.cs

@@ -2,10 +2,7 @@ using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using ReactiveUI.Validation.Extensions;
 using ReactiveUI.Validation.Helpers;
-using Shadowsocks.Controller;
 using Shadowsocks.WPF.Localization;
-using Shadowsocks.Model;
-using Shadowsocks.View;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
@@ -21,10 +18,6 @@ namespace Shadowsocks.WPF.ViewModels
     {
         public OnlineConfigViewModel()
         {
-            _config = Program.MainController.GetCurrentConfiguration();
-            _controller = Program.MainController;
-            _menuViewController = Program.MenuController;
-
             Sources = new ObservableCollection<string>(_config.onlineConfigSource);
             SelectedSource = "";
             Address = "";
@@ -91,10 +84,6 @@ namespace Shadowsocks.WPF.ViewModels
                 });
         }
 
-        private readonly Configuration _config;
-        private readonly ShadowsocksController _controller;
-        private readonly MenuViewController _menuViewController;
-
         public ValidationHelper AddressRule { get; }
 
         public ReactiveCommand<Unit, bool> Update { get; }

Shadowsocks.WPF/ViewModels/ServerSharingViewModel.cs

@@ -1,11 +1,10 @@
-using ReactiveUI;
+using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
-using Shadowsocks.Model;
+using Shadowsocks.Models;
 using System;
 using System.Collections.Generic;
 using System.Drawing;
 using System.IO;
-using System.Linq;
 using System.Reactive;
 using System.Windows;
 using System.Windows.Media.Imaging;
@@ -17,10 +16,9 @@ namespace Shadowsocks.WPF.ViewModels
         /// <summary>
         /// The view model class for the server sharing user control.
         /// </summary>
-        public ServerSharingViewModel()
+        public ServerSharingViewModel(List<Server> servers)
         {
-            _config = Program.MainController.GetCurrentConfiguration();
-            Servers = _config.configs;
+            Servers = servers;
             SelectedServer = Servers[0];
 
             this.WhenAnyValue(x => x.SelectedServer)
@@ -29,8 +27,6 @@ namespace Shadowsocks.WPF.ViewModels
             CopyLink = ReactiveCommand.Create(() => Clipboard.SetText(SelectedServerUrl));
         }
 
-        private readonly Configuration _config;
-
         public ReactiveCommand<Unit, Unit> CopyLink { get; }
 
         [Reactive]
@@ -40,10 +36,10 @@ namespace Shadowsocks.WPF.ViewModels
         public Server SelectedServer { get; set; }
 
         [Reactive]
-        public string SelectedServerUrl { get; private set; }
+        public string SelectedServerUrl { get; private set; } = null!;
 
         [Reactive]
-        public BitmapImage SelectedServerUrlImage { get; private set; }
+        public BitmapImage SelectedServerUrlImage { get; private set; } = null!;
 
         /// <summary>
         /// Called when SelectedServer changed
@@ -52,7 +48,7 @@ namespace Shadowsocks.WPF.ViewModels
         private void UpdateUrlAndImage()
         {
             // update SelectedServerUrl
-            SelectedServerUrl = SelectedServer.GetURL(_config.generateLegacyUrl);
+            SelectedServerUrl = SelectedServer.ToUrl().AbsoluteUri;
 
             // generate QR code
             var qrCode = ZXing.QrCode.Internal.Encoder.encode(SelectedServerUrl, ZXing.QrCode.Internal.ErrorCorrectionLevel.L);

Shadowsocks.WPF/ViewModels/VersionUpdatePromptViewModel.cs

@@ -1,19 +1,23 @@
-using Newtonsoft.Json.Linq;
 using ReactiveUI;
-using Shadowsocks.Controller;
+using Shadowsocks.WPF.Services;
+using Splat;
 using System.Reactive;
+using System.Text.Json;
 
 namespace Shadowsocks.WPF.ViewModels
 {
     public class VersionUpdatePromptViewModel : ReactiveObject
     {
-        public VersionUpdatePromptViewModel(JToken releaseObject)
+        public VersionUpdatePromptViewModel(JsonElement releaseObject)
         {
-            _updateChecker = Program.MenuController.updateChecker;
+            _updateChecker = Locator.Current.GetService<UpdateChecker>();
             _releaseObject = releaseObject;
+            var releaseTagName = _releaseObject.GetProperty("tag_name").GetString();
+            var releaseNotes = _releaseObject.GetProperty("body").GetString();
+            var releaseIsPrerelease = _releaseObject.GetProperty("prerelease").GetBoolean();
             ReleaseNotes = string.Concat(
-                $"# {((bool)_releaseObject["prerelease"] ? "⚠ Pre-release" : "ℹ Release")} {(string)_releaseObject["tag_name"] ?? "Failed to get tag name"}\r\n",
-                (string)_releaseObject["body"] ?? "Failed to get release notes");
+                $"# {(releaseIsPrerelease ? "⚠ Pre-release" : "ℹ Release")} {releaseTagName ?? "Failed to get tag name"}\r\n",
+                releaseNotes ?? "Failed to get release notes");
 
             Update = ReactiveCommand.CreateFromTask(_updateChecker.DoUpdate);
             SkipVersion = ReactiveCommand.Create(_updateChecker.SkipUpdate);
@@ -21,7 +25,7 @@ namespace Shadowsocks.WPF.ViewModels
         }
 
         private readonly UpdateChecker _updateChecker;
-        private readonly JToken _releaseObject;
+        private readonly JsonElement _releaseObject;
 
         public string ReleaseNotes { get; }
 

Shadowsocks.WPF/Views/VersionUpdatePromptView.xaml.cs

@@ -1,7 +1,7 @@
-using Newtonsoft.Json.Linq;
 using ReactiveUI;
 using Shadowsocks.WPF.ViewModels;
 using System.Reactive.Disposables;
+using System.Text.Json;
 
 namespace Shadowsocks.WPF.Views
 {
@@ -10,7 +10,7 @@ namespace Shadowsocks.WPF.Views
     /// </summary>
     public partial class VersionUpdatePromptView : ReactiveUserControl<VersionUpdatePromptViewModel>
     {
-        public VersionUpdatePromptView(JToken releaseObject)
+        public VersionUpdatePromptView(JsonElement releaseObject)
         {
             InitializeComponent();
             ViewModel = new VersionUpdatePromptViewModel(releaseObject);

Shadowsocks/Models/Group.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json.Serialization;
+
+namespace Shadowsocks.Models
+{
+    public class Group
+    {
+        /// <summary>
+        /// Group name.
+        /// </summary>
+        public string Name { get; set; }
+        
+        /// <summary>
+        /// UUID of the group.
+        /// </summary>
+        public Guid Id { get; set; }
+
+        /// <summary>
+        /// URL of SIP008 online configuration delivery source.
+        /// </summary>
+        public string OnlineConfigSource { get; set; }
+
+        /// <summary>
+        /// SIP008 configuration version.
+        /// </summary>
+        public int Version { get; set; }
+
+        /// <summary>
+        /// A list of servers in the group.
+        /// </summary>
+        public List<Server> Servers { get; set; }
+
+        /// <summary>
+        /// Data used in bytes.
+        /// The value is fetched from SIP008 provider.
+        /// </summary>
+        public ulong BytesUsed { get; set; }
+
+        /// <summary>
+        /// Data remaining to be used in bytes.
+        /// The value is fetched from SIP008 provider.
+        /// </summary>
+        public ulong BytesRemaining { get; set; }
+
+        public Group()
+        {
+            Name = "";
+            Id = new Guid();
+            OnlineConfigSource = "";
+            Version = 1;
+            BytesUsed = 0UL;
+            BytesRemaining = 0UL;
+            Servers = new List<Server>();
+        }
+
+        public Group(string name)
+        {
+            Name = name;
+            Id = new Guid();
+            OnlineConfigSource = "";
+            Version = 1;
+            BytesUsed = 0UL;
+            BytesRemaining = 0UL;
+            Servers = new List<Server>();
+        }
+    }
+}

Shadowsocks/Models/JsonSnakeCaseNamingPolicy.cs

@@ -0,0 +1,87 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Source: https://github.com/dotnet/corefx/pull/40003
+// See also: https://github.com/dotnet/runtime/issues/782
+
+using System;
+using System.Text;
+using System.Text.Json;
+
+namespace Shadowsocks.Models
+{
+    public class JsonSnakeCaseNamingPolicy : JsonNamingPolicy
+    {
+        internal enum SnakeCaseState
+        {
+            Start,
+            Lower,
+            Upper,
+            NewWord
+        }
+
+        public override string ConvertName(string name)
+        {
+            if (string.IsNullOrEmpty(name))
+            {
+                return name;
+            }
+
+            var sb = new StringBuilder();
+            var state = SnakeCaseState.Start;
+
+            var nameSpan = name.AsSpan();
+
+            for (int i = 0; i < nameSpan.Length; i++)
+            {
+                if (nameSpan[i] == ' ')
+                {
+                    if (state != SnakeCaseState.Start)
+                    {
+                        state = SnakeCaseState.NewWord;
+                    }
+                }
+                else if (char.IsUpper(nameSpan[i]))
+                {
+                    switch (state)
+                    {
+                        case SnakeCaseState.Upper:
+                            bool hasNext = (i + 1 < nameSpan.Length);
+                            if (i > 0 && hasNext)
+                            {
+                                char nextChar = nameSpan[i + 1];
+                                if (!char.IsUpper(nextChar) && nextChar != '_')
+                                {
+                                    sb.Append('_');
+                                }
+                            }
+                            break;
+                        case SnakeCaseState.Lower:
+                        case SnakeCaseState.NewWord:
+                            sb.Append('_');
+                            break;
+                    }
+                    sb.Append(char.ToLowerInvariant(nameSpan[i]));
+                    state = SnakeCaseState.Upper;
+                }
+                else if (nameSpan[i] == '_')
+                {
+                    sb.Append('_');
+                    state = SnakeCaseState.Start;
+                }
+                else
+                {
+                    if (state == SnakeCaseState.NewWord)
+                    {
+                        sb.Append('_');
+                    }
+
+                    sb.Append(nameSpan[i]);
+                    state = SnakeCaseState.Lower;
+                }
+            }
+
+            return sb.ToString();
+        }
+    }
+}

Shadowsocks/Models/Server.cs

@@ -23,8 +23,9 @@ namespace Shadowsocks.Models
         public Server()
         {
             Host = "";
+            Port = 8388;
             Password = "";
-            Method = "";
+            Method = "chacha20-ietf-poly1305";
             Plugin = "";
             PluginOpts = "";
             Name = "";
@@ -50,5 +51,75 @@ namespace Shadowsocks.Models
             Name = name;
             Uuid = uuid;
         }
+
+        public override bool Equals(object? obj) => obj is Server server && Uuid == server.Uuid;
+        public override int GetHashCode() => base.GetHashCode();
+        public override string ToString() => Name;
+
+        /// <summary>
+        /// Converts this server object into an ss:// URL.
+        /// </summary>
+        /// <returns></returns>
+        public Uri ToUrl()
+        {
+            UriBuilder uriBuilder = new UriBuilder("ss", Host, Port)
+            {
+                UserName = Utilities.Base64Url.Encode($"{Method}:{Password}"),
+                Fragment = Name,
+            };
+            if (!string.IsNullOrEmpty(Plugin))
+                if (!string.IsNullOrEmpty(PluginOpts))
+                    uriBuilder.Query = $"plugin={Uri.EscapeDataString($"{Plugin};{PluginOpts}")}"; // manually escape as a workaround
+                else
+                    uriBuilder.Query = $"plugin={Plugin}";
+            return uriBuilder.Uri;
+        }
+
+        /// <summary>
+        /// Tries to parse an ss:// URL into a Server object.
+        /// </summary>
+        /// <param name="url">The ss:// URL to parse.</param>
+        /// <param name="server">
+        /// A Server object represented by the URL.
+        /// A new empty Server object if the URL is invalid.</param>
+        /// <returns>True for success. False for failure.</returns>
+        public static bool TryParse(string url, out Server server)
+        {
+            try
+            {
+                var uri = new Uri(url);
+                if (uri.Scheme != "ss")
+                    throw new ArgumentException("Wrong URL scheme");
+                var userinfo_base64url = uri.UserInfo;
+                var userinfo = Utilities.Base64Url.DecodeToString(userinfo_base64url);
+                var userinfoSplitArray = userinfo.Split(':', 2);
+                var method = userinfoSplitArray[0];
+                var password = userinfoSplitArray[1];
+                server = new Server(uri.Fragment, new Guid().ToString(), uri.Host, uri.Port, password, method);
+                // find the plugin query
+                var parsedQueriesArray = uri.Query.Split("?&");
+                var pluginQueryContent = "";
+                foreach (var query in parsedQueriesArray)
+                {
+                    if (query.StartsWith("plugin=") && query.Length > 7)
+                    {
+                        pluginQueryContent = query[7..]; // remove "plugin="
+                    }
+                }
+                var unescapedpluginQuery = Uri.UnescapeDataString(pluginQueryContent);
+                var parsedPluginQueryArray = unescapedpluginQuery.Split(';', 2);
+                if (parsedPluginQueryArray.Length == 2) // is valid plugin query
+                {
+                    server.Plugin = parsedPluginQueryArray[0];
+                    server.PluginOpts = parsedPluginQueryArray[1];
+                }
+                return true;
+            }
+            catch
+            {
+                server = new Server();
+                return false;
+            }
+        }
     }
 }

Shadowsocks/Shadowsocks.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 

shadowsocks-windows.sln

@@ -31,6 +31,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Shadowsocks.Protobuf", "Sha
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Shadowsocks.WPF", "Shadowsocks.WPF\Shadowsocks.WPF.csproj", "{EA1FB2D4-B5A7-47A6-B097-2F4D29E23010}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Shadowsocks.Interop", "Shadowsocks.Interop\Shadowsocks.Interop.csproj", "{1CC6E8A9-1875-430C-B2BB-F227ACD711B1}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -61,6 +63,10 @@ Global
 		{EA1FB2D4-B5A7-47A6-B097-2F4D29E23010}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EA1FB2D4-B5A7-47A6-B097-2F4D29E23010}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EA1FB2D4-B5A7-47A6-B097-2F4D29E23010}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1CC6E8A9-1875-430C-B2BB-F227ACD711B1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1CC6E8A9-1875-430C-B2BB-F227ACD711B1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1CC6E8A9-1875-430C-B2BB-F227ACD711B1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1CC6E8A9-1875-430C-B2BB-F227ACD711B1}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE