From 26cfb40b529250faa106bbdedd6be5751c8f3411 Mon Sep 17 00:00:00 2001
From: David Fowler <davidfowl@gmail.com>
Date: Thu, 11 Mar 2021 22:20:09 -0800
Subject: [PATCH] Use zero byte reads for incoming TLS frames - We recently did
 some work to reduce the amount of memory allocated by SslStream on idle reads
 so take advantage of it here by using a new StreamPipeReader feature that
 makes zero byte reads on the underlying Stream.

---
 .../Kestrel/Core/src/Middleware/HttpsConnectionMiddleware.cs   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Servers/Kestrel/Core/src/Middleware/HttpsConnectionMiddleware.cs b/src/Servers/Kestrel/Core/src/Middleware/HttpsConnectionMiddleware.cs
index 4abe340e4856..4a9418c97dc7 100644
--- a/src/Servers/Kestrel/Core/src/Middleware/HttpsConnectionMiddleware.cs
+++ b/src/Servers/Kestrel/Core/src/Middleware/HttpsConnectionMiddleware.cs
@@ -411,7 +411,8 @@ private SslDuplexPipe CreateSslDuplexPipe(IDuplexPipe transport, MemoryPool<byte
                 pool: memoryPool,
                 bufferSize: memoryPool.GetMinimumSegmentSize(),
                 minimumReadSize: memoryPool.GetMinimumAllocSize(),
-                leaveOpen: true
+                leaveOpen: true,
+                useZeroByteReads: true
             );
 
             var outputPipeOptions = new StreamPipeWriterOptions