Relax stream cancellation filter after response start

Copilot · BenjaminMichaelis · web-flow · commit f2ca026bb522 · 2026-05-14T00:44:45.000Z
Agent-Logs-Url: https://github.com/IntelliTect/EssentialCSharp.Web/sessions/c0627de3-aa52-4d77-a845-1420ecbe2416 Co-authored-by: BenjaminMichaelis <22186029+BenjaminMichaelis@users.noreply.github.com>
diff --git a/EssentialCSharp.Web/Controllers/ChatController.cs b/EssentialCSharp.Web/Controllers/ChatController.cs
@@ -134,7 +134,7 @@ public async Task StreamMessage([FromBody] ChatMessageRequest request, Cancellat
             await Response.WriteAsync("data: [DONE]\n\n", cancellationToken);
             await Response.Body.FlushAsync(cancellationToken);
         }
-        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested || HttpContext.RequestAborted.IsCancellationRequested)
+        catch (OperationCanceledException) when (Response.HasStarted || cancellationToken.IsCancellationRequested || HttpContext.RequestAborted.IsCancellationRequested)
         {
             LogChatStreamCancelled(_Logger, User.Identity?.Name);
         }

Original file line number	Diff line number	Diff line change
`@@ -134,7 +134,7 @@ public async Task StreamMessage([FromBody] ChatMessageRequest request, Cancellat`
`134`	`134`	`await Response.WriteAsync("data: [DONE]\n\n", cancellationToken);`
`135`	`135`	`await Response.Body.FlushAsync(cancellationToken);`
`136`	`136`	`}`
`137`		`- catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested \|\| HttpContext.RequestAborted.IsCancellationRequested)`
	`137`	`+ catch (OperationCanceledException) when (Response.HasStarted \|\| cancellationToken.IsCancellationRequested \|\| HttpContext.RequestAborted.IsCancellationRequested)`
`138`	`138`	`{`
`139`	`139`	`LogChatStreamCancelled(_Logger, User.Identity?.Name);`
`140`	`140`	`}`