From 00ba8d55492284581695d824648590715a8bd386 Mon Sep 17 00:00:00 2001
From: Rob Ede <robjtede@icloud.com>
Date: Wed, 6 Jan 2021 18:58:24 +0000
Subject: [PATCH] add http3 variant to protocol enum

---
 actix-http/CHANGES.md     | 3 +++
 actix-http/src/lib.rs     | 4 +++-
 actix-http/src/service.rs | 2 ++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/actix-http/CHANGES.md b/actix-http/CHANGES.md
index eadbf6f46..6daed67a0 100644
--- a/actix-http/CHANGES.md
+++ b/actix-http/CHANGES.md
@@ -1,6 +1,9 @@
 # Changes
 
 ## Unreleased - 2021-xx-xx
+### Added
+* Add `Http3` to `Protocol` enum for future compatibility and also mark `#[non_exhaustive]`.
+
 ### Changed
 * Update `actix-*` dependencies to tokio `1.0` based versions. [#1813]
 * Bumped `rand` to `0.8`.
diff --git a/actix-http/src/lib.rs b/actix-http/src/lib.rs
index 3879bae81..e17b7de0a 100644
--- a/actix-http/src/lib.rs
+++ b/actix-http/src/lib.rs
@@ -72,11 +72,13 @@ pub mod http {
     pub use crate::message::ConnectionType;
 }
 
-/// HTTP protocol
+/// A major HTTP protocol version.
 #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+#[non_exhaustive]
 pub enum Protocol {
     Http1,
     Http2,
+    Http3,
 }
 
 type ConnectCallback<IO> = dyn Fn(&IO, &mut Extensions);
diff --git a/actix-http/src/service.rs b/actix-http/src/service.rs
index e137ab6fa..392a1426f 100644
--- a/actix-http/src/service.rs
+++ b/actix-http/src/service.rs
@@ -580,6 +580,8 @@ where
                     peer_addr,
                 )),
             },
+
+            proto => unimplemented!("Unsupported HTTP version: {:?}.", proto)
         }
     }
 }