init

Guardian/Program.cs

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+using Microsoft.Win32;
+using System.Diagnostics;
+
+namespace FireflyProxy.Guardian;
+
+internal class Program
+{
+    static async Task Main(string[] args)
+    {
+        if (args.Length != 1 || !int.TryParse(args[0], out var watchPid))
+        {
+            Console.WriteLine("Usage: Proxy Guardian [watch-pid]");
+            Environment.Exit(1);
+            return;
+        }
+
+        Console.WriteLine("Proxy Guardian start!");
+        Process proc;
+        try
+        {
+            proc = Process.GetProcessById(watchPid);
+            Console.WriteLine($"Guardian find process {proc.ProcessName}:{watchPid}.");
+        }
+        catch
+        {
+            DisableSystemProxy();
+            Environment.Exit(2);
+            return;
+        }
+
+        while (!proc.HasExited)
+        {
+            await Task.Delay(1000);
+        }
+        DisableSystemProxy();
+    }
+
+    private static void DisableSystemProxy()
+    {
+        try
+        {
+            using RegistryKey? key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Internet Settings", true);
+
+            key?.SetValue("ProxyEnable", 0);
+            Console.WriteLine($"Guardian successfully disabled System Proxy.");
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine(ex);
+            Console.WriteLine();
+            Console.WriteLine($"Guardian failed to disable System Proxy.");
+        }
+    }
+}