From 5e7bb0f5c5a12cce07f6d37384f05983d4d16ef8 Mon Sep 17 00:00:00 2001
From: Steve Sanderson <SteveSandersonMS@users.noreply.github.com>
Date: Sun, 11 Jun 2017 19:57:26 +0100
Subject: [PATCH] Don't log OperationCanceledException every time an HMR client
 disconnects

---
 .../Webpack/ConditionalProxyMiddleware.cs              | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Microsoft.AspNetCore.SpaServices/Webpack/ConditionalProxyMiddleware.cs b/src/Microsoft.AspNetCore.SpaServices/Webpack/ConditionalProxyMiddleware.cs
index 118e264014..ba0cf9f926 100644
--- a/src/Microsoft.AspNetCore.SpaServices/Webpack/ConditionalProxyMiddleware.cs
+++ b/src/Microsoft.AspNetCore.SpaServices/Webpack/ConditionalProxyMiddleware.cs
@@ -98,7 +98,15 @@ namespace Microsoft.AspNetCore.SpaServices.Webpack
 
                 using (var responseStream = await responseMessage.Content.ReadAsStreamAsync())
                 {
-                    await responseStream.CopyToAsync(context.Response.Body, DefaultHttpBufferSize, context.RequestAborted);
+                    try
+                    {
+                        await responseStream.CopyToAsync(context.Response.Body, DefaultHttpBufferSize, context.RequestAborted);
+                    }
+                    catch (OperationCanceledException)
+                    {
+                        // The CopyToAsync task will be canceled if the client disconnects (e.g., user
+                        // closes or refreshes the browser tab). Don't treat this as an error.
+                    }
                 }
 
                 return true;