From 7ddb46e74db7f733968925160a6334dd17260e79 Mon Sep 17 00:00:00 2001
From: DHR60 <dehongren60@gmail.com>
Date: Tue, 24 Mar 2026 03:25:02 +0000
Subject: [PATCH] Xray browser header masquerading (#8981)

---
 v2rayN/ServiceLib/Global.cs                    |  8 ++++----
 v2rayN/ServiceLib/Models/V2rayConfig.cs        |  3 +++
 .../CoreConfig/V2ray/V2rayOutboundService.cs   | 18 ++++++++++--------
 3 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/v2rayN/ServiceLib/Global.cs b/v2rayN/ServiceLib/Global.cs
index e9a5a41e..bf8dd7ab 100644
--- a/v2rayN/ServiceLib/Global.cs
+++ b/v2rayN/ServiceLib/Global.cs
@@ -182,13 +182,14 @@ public class Global
         @"https://raw.githubusercontent.com/Chocolate4U/Iran-v2ray-rules/main/v2rayN/"
     ];
 
-    public static readonly Dictionary<string, string> UserAgentTexts = new()
+    public static readonly Dictionary<string, string> TcpHttpUserAgentTexts = new()
     {
         {"chrome","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36" },
         {"firefox","Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0" },
         {"safari","Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Safari/605.1.15" },
         {"edge","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36 Edg/91.0.864.70" },
-        {"none",""}
+        {"none",""},
+        {"golang",""}
     };
 
     public const string Hysteria2ProtocolShare = "hy2://";
@@ -391,9 +392,8 @@ public class Global
     [
         "chrome",
         "firefox",
-        "safari",
         "edge",
-        "none"
+        "golang"
     ];
 
     public static readonly List<string> XhttpMode =
diff --git a/v2rayN/ServiceLib/Models/V2rayConfig.cs b/v2rayN/ServiceLib/Models/V2rayConfig.cs
index 4d3f9512..983cb4da 100644
--- a/v2rayN/ServiceLib/Models/V2rayConfig.cs
+++ b/v2rayN/ServiceLib/Models/V2rayConfig.cs
@@ -421,6 +421,8 @@ public class HttpupgradeSettings4Ray
     public string? path { get; set; }
 
     public string? host { get; set; }
+
+    public Headers4Ray headers { get; set; }
 }
 
 public class XhttpSettings4Ray
@@ -456,6 +458,7 @@ public class GrpcSettings4Ray
     public int? health_check_timeout { get; set; }
     public bool? permit_without_stream { get; set; }
     public int? initial_windows_size { get; set; }
+    public string? user_agent { get; set; }
 }
 
 public class HysteriaSettings4Ray
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
index e9241030..85f72e41 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
@@ -354,11 +354,7 @@ public partial class CoreConfigV2rayService
             var host = _node.RequestHost.TrimEx();
             var path = _node.Path.TrimEx();
             var sni = _node.Sni.TrimEx();
-            var useragent = "";
-            if (!_config.CoreBasicItem.DefUserAgent.IsNullOrEmpty())
-            {
-                useragent = Global.UserAgentTexts.GetValueOrDefault(_config.CoreBasicItem.DefUserAgent, _config.CoreBasicItem.DefUserAgent);
-            }
+            var useragent = _config.CoreBasicItem.DefUserAgent ?? string.Empty;
 
             //if tls
             if (_node.StreamSecurity == Global.StreamSecurity)
@@ -496,13 +492,17 @@ public partial class CoreConfigV2rayService
                 case nameof(ETransport.httpupgrade):
                     HttpupgradeSettings4Ray httpupgradeSettings = new();
 
+                    if (host.IsNotEmpty())
+                    {
+                        httpupgradeSettings.host = host;
+                    }
                     if (path.IsNotEmpty())
                     {
                         httpupgradeSettings.path = path;
                     }
-                    if (host.IsNotEmpty())
+                    if (useragent.IsNotEmpty())
                     {
-                        httpupgradeSettings.host = host;
+                        httpupgradeSettings.headers.UserAgent = useragent;
                     }
                     streamSettings.httpupgradeSettings = httpupgradeSettings;
 
@@ -581,6 +581,7 @@ public partial class CoreConfigV2rayService
                         health_check_timeout = _config.GrpcItem.HealthCheckTimeout,
                         permit_without_stream = _config.GrpcItem.PermitWithoutStream,
                         initial_windows_size = _config.GrpcItem.InitialWindowsSize,
+                        user_agent = useragent.NullIfEmpty(),
                     };
                     streamSettings.grpcSettings = grpcSettings;
                     break;
@@ -655,10 +656,11 @@ public partial class CoreConfigV2rayService
 
                         //request Host
                         var request = EmbedUtils.GetEmbedText(Global.V2raySampleHttpRequestFileName);
+                        var useragentValue = Global.TcpHttpUserAgentTexts.GetValueOrDefault(useragent, useragent);
                         var arrHost = host.Split(',');
                         var host2 = string.Join(",".AppendQuotes(), arrHost);
                         request = request.Replace("$requestHost$", $"{host2.AppendQuotes()}");
-                        request = request.Replace("$requestUserAgent$", $"{useragent.AppendQuotes()}");
+                        request = request.Replace("$requestUserAgent$", $"{useragentValue.AppendQuotes()}");
                         //Path
                         var pathHttp = @"/";
                         if (path.IsNotEmpty())