From 9cb210040d6fac3767d7347071c35cdd7e1badf5 Mon Sep 17 00:00:00 2001
From: Florian Rappl <florian.rappl@skve.de>
Date: Thu, 3 Sep 2026 16:25:47 +0200
Subject: [PATCH] Fixed #1105

---
 Changelog.md                                  |  1 +
 .../Bridge/SocketIOConnection.cs              | 28 ++++++++++++++++---
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/Changelog.md b/Changelog.md
index 977bdf7..d9f2b76 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -3,6 +3,7 @@
 ## ElectronNET.Core
 
 - Updated dependencies
+- Fixed socket bridge connection when a system proxy is configured (#1105)
 - Fixed cross-compilation behavior on same platform (#1098) @epsnm
 - Fixed resolution of unrelated target (#1099) @epsnm
 - Added target framework customization (#1095) @epsnm
diff --git a/src/ElectronNET.API/Bridge/SocketIOConnection.cs b/src/ElectronNET.API/Bridge/SocketIOConnection.cs
index 36ea2e5..10a88a7 100644
--- a/src/ElectronNET.API/Bridge/SocketIOConnection.cs
+++ b/src/ElectronNET.API/Bridge/SocketIOConnection.cs
@@ -4,6 +4,7 @@ namespace ElectronNET.API;
 
 using System;
 using System.Collections.Generic;
+using System.Net;
 using System.Threading.Tasks;
 using ElectronNET.API.Serialization;
 using SocketIO.Serializer.SystemTextJson;
@@ -18,13 +19,21 @@ internal class SocketIOConnection : ISocketConnection
 
     public SocketIOConnection(string uri, string authorization)
     {
-        var opts = string.IsNullOrEmpty(authorization) ? new SocketIOOptions() : new SocketIOOptions
+        var opts = new SocketIOOptions
         {
-            ExtraHeaders = new Dictionary<string, string>
+            // The bridge is a loopback IPC channel, so it must never go through a
+            // (system) proxy - otherwise the handshake never reaches the socket server.
+            Proxy = DirectProxy.Instance,
+        };
+
+        if (!string.IsNullOrEmpty(authorization))
+        {
+            opts.ExtraHeaders = new Dictionary<string, string>
             {
                 ["authorization"] = authorization
-            },
-        };
+            };
+        }
+
         _socket = new SocketIO(uri, opts);
         _socket.Serializer = new SystemTextJsonSerializer(ElectronJson.Options);
         // Use default System.Text.Json serializer from SocketIOClient.
@@ -152,4 +161,15 @@ internal class SocketIOConnection : ISocketConnection
             throw new ObjectDisposedException(nameof(SocketIOConnection));
         }
     }
+
+    private sealed class DirectProxy : IWebProxy
+    {
+        public static readonly DirectProxy Instance = new DirectProxy();
+
+        public ICredentials Credentials { get; set; }
+
+        public Uri GetProxy(Uri destination) => destination;
+
+        public bool IsBypassed(Uri host) => true;
+    }
 }
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