Обновить Program.cs

Program.cs

@@ -236,21 +236,72 @@ class WinHttpProxy : IWebProxy
 static class WinHttpHelper
 {
     [DllImport("winhttp.dll", SetLastError = true)]
-    static extern bool WinHttpGetIEProxyConfigForCurrentUser(out WINHTTP_CURRENT_USER_IE_PROXY_CONFIG config);
+    static extern bool WinHttpGetIEProxyConfigForCurrentUser(
+        out WINHTTP_CURRENT_USER_IE_PROXY_CONFIG config);
 
     public static Uri GetProxyForUrl(Uri url)
     {
-        WinHttpGetIEProxyConfigForCurrentUser(out var cfg);
+        if (!WinHttpGetIEProxyConfigForCurrentUser(out var cfg))
+            return url;
 
-        if (!string.IsNullOrEmpty(cfg.lpszProxy))
+        string proxy = PtrToString(cfg.lpszProxy);
+
+        if (string.IsNullOrWhiteSpace(proxy))
+            return url;
+
+        string selectedProxy = ParseProxy(proxy, url.Scheme);
+
+        if (string.IsNullOrEmpty(selectedProxy))
+            return url;
+
+        return new Uri(NormalizeProxy(selectedProxy));
+    }
+
+    // ===== helpers =====
+
+    static string PtrToString(IntPtr ptr)
+    {
+        if (ptr == IntPtr.Zero)
+            return null;
+
+        return Marshal.PtrToStringUni(ptr);
+    }
+
+    static string ParseProxy(string proxy, string scheme)
+    {
+        // варианты:
+        // "proxy:8080"
+        // "http=proxy:8080;https=proxy2:8080"
+
+        if (!proxy.Contains("="))
+            return proxy;
+
+        var entries = proxy.Split(';', StringSplitOptions.RemoveEmptyEntries);
+
+        foreach (var entry in entries)
         {
-            var parts = cfg.lpszProxy.Split(':');
-            return new Uri($"http://{parts[0]}:{parts[1]}");
+            var parts = entry.Split('=', 2);
+            if (parts.Length != 2)
+                continue;
+
+            if (parts[0].Equals(scheme, StringComparison.OrdinalIgnoreCase))
+                return parts[1];
         }
 
-        return url; // direct
+        // fallback — берём первый
+        return entries[0].Split('=')[1];
     }
 
+    static string NormalizeProxy(string proxy)
+    {
+        if (!proxy.StartsWith("http://") && !proxy.StartsWith("https://"))
+            return "http://" + proxy;
+
+        return proxy;
+    }
+
+    // ===== struct =====
+
     struct WINHTTP_CURRENT_USER_IE_PROXY_CONFIG
     {
         public bool fAutoDetect;