From b8b574117466a2e58c6b9117c9b53837d766553f Mon Sep 17 00:00:00 2001
From: Spruce Weber-Milne <swebermilne@ucdavis.edu>
Date: Wed, 8 Jul 2026 10:27:32 -0700
Subject: [PATCH] Cancellation exception is not an error

---
 server/Helpers/LoggingMiddlewareHelper.cs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/server/Helpers/LoggingMiddlewareHelper.cs b/server/Helpers/LoggingMiddlewareHelper.cs
index 2bda801..e3f7afb 100644
--- a/server/Helpers/LoggingMiddlewareHelper.cs
+++ b/server/Helpers/LoggingMiddlewareHelper.cs
@@ -12,6 +12,17 @@ public static void UseApiFailureLogging(this WebApplication app)
             {
                 await next();
             }
+            catch (OperationCanceledException ex)
+                when (ctx.Request.Path.StartsWithSegments("/api") && ctx.RequestAborted.IsCancellationRequested)
+            {
+                app.Logger.LogInformation(
+                    ex,
+                    "API request was canceled by the client: {Method} {Path}. ContentLength={ContentLength}.",
+                    ctx.Request.Method,
+                    ctx.Request.Path,
+                    ctx.Request.ContentLength);
+                throw;
+            }
             catch (Exception ex) when (ctx.Request.Path.StartsWithSegments("/api"))
             {
                 app.Logger.LogError(