From 6eee2c2342d6d626c6f4dd0053e888f4f240083e Mon Sep 17 00:00:00 2001
From: 2dust <31833384+2dust@users.noreply.github.com>
Date: Thu, 29 Feb 2024 10:11:27 +0800
Subject: [PATCH] Add obfs=http support for sing-box ss

---
 v2rayN/v2rayN/Handler/CoreConfigSingbox.cs | 8 ++++++++
 v2rayN/v2rayN/Handler/ShareHandler.cs      | 6 +++---
 v2rayN/v2rayN/Model/SingboxConfig.cs       | 2 ++
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/v2rayN/v2rayN/Handler/CoreConfigSingbox.cs b/v2rayN/v2rayN/Handler/CoreConfigSingbox.cs
index 335582e8..c88d422e 100644
--- a/v2rayN/v2rayN/Handler/CoreConfigSingbox.cs
+++ b/v2rayN/v2rayN/Handler/CoreConfigSingbox.cs
@@ -238,6 +238,14 @@ namespace v2rayN.Handler
                     outbound.method = LazyConfig.Instance.GetShadowsocksSecurities(node).Contains(node.security) ? node.security : Global.None;
                     outbound.password = node.id;
 
+                    if (node.network == Global.DefaultNetwork
+                        && node.headerType == Global.TcpHeaderHttp
+                        && node.requestHost.IsNullOrEmpty() == false)
+                    {
+                        outbound.plugin = "obfs-local";
+                        outbound.plugin_opts = $"obfs=http;obfs-host={node.requestHost};";
+                    }
+
                     GenOutboundMux(node, outbound);
                 }
                 else if (node.configType == EConfigType.Socks)
diff --git a/v2rayN/v2rayN/Handler/ShareHandler.cs b/v2rayN/v2rayN/Handler/ShareHandler.cs
index ba78a6c6..3704cce6 100644
--- a/v2rayN/v2rayN/Handler/ShareHandler.cs
+++ b/v2rayN/v2rayN/Handler/ShareHandler.cs
@@ -686,13 +686,13 @@ namespace v2rayN.Handler
             if (queryParameters["plugin"] != null)
             {
                 //obfs-host exists
-                var obfsHost = queryParameters["plugin"].Split(';').FirstOrDefault(t => t.Contains("obfs-host"));
+                var obfsHost = queryParameters["plugin"]?.Split(';').FirstOrDefault(t => t.Contains("obfs-host"));
                 if (queryParameters["plugin"].Contains("obfs=http") && !Utile.IsNullOrEmpty(obfsHost))
                 {
-                    obfsHost = obfsHost.Replace("obfs-host=", "");
+                    obfsHost = obfsHost?.Replace("obfs-host=", "");
                     server.network = Global.DefaultNetwork;
                     server.headerType = Global.TcpHeaderHttp;
-                    server.requestHost = obfsHost;
+                    server.requestHost = obfsHost ?? "";
                 }
                 else
                 {
diff --git a/v2rayN/v2rayN/Model/SingboxConfig.cs b/v2rayN/v2rayN/Model/SingboxConfig.cs
index 7f243e63..2e61918f 100644
--- a/v2rayN/v2rayN/Model/SingboxConfig.cs
+++ b/v2rayN/v2rayN/Model/SingboxConfig.cs
@@ -118,6 +118,8 @@
         public string? peer_public_key { get; set; }
         public int[]? reserved { get; set; }
         public int? mtu { get; set; }
+        public string? plugin { get; set; }
+        public string? plugin_opts { get; set; }
         public Tls4Sbox tls { get; set; }
         public Multiplex4Sbox multiplex { get; set; }
         public Transport4Sbox transport { get; set; }