From 078d685d8e84e9c97f605d2f302dde72f1d2d248 Mon Sep 17 00:00:00 2001
From: "nick.yi" <jqrddd@163.com>
Date: Thu, 20 Nov 2025 14:07:14 +0800
Subject: [PATCH] hotfix HttpContext NullReferenceException

---
 src/Plugins/BotSharp.Plugin.ChatHub/SignalRHub.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Plugins/BotSharp.Plugin.ChatHub/SignalRHub.cs b/src/Plugins/BotSharp.Plugin.ChatHub/SignalRHub.cs
index 2cb0d1627..a261084bb 100644
--- a/src/Plugins/BotSharp.Plugin.ChatHub/SignalRHub.cs
+++ b/src/Plugins/BotSharp.Plugin.ChatHub/SignalRHub.cs
@@ -28,7 +28,8 @@ public override async Task OnConnectedAsync()
         _logger.LogInformation($"SignalR Hub: {_user.FirstName} {_user.LastName} ({Context.User.Identity.Name}) connected in {Context.ConnectionId}");
 
         var convService = _services.GetRequiredService<IConversationService>();
-        _context.HttpContext.Request.Query.TryGetValue("conversation-id", out var conversationId);
+        var httpContext = Context.GetHttpContext();
+        string? conversationId = httpContext?.Request?.Query["conversation-id"].FirstOrDefault();
 
         if (!string.IsNullOrEmpty(conversationId))
         {