From b6322c42a148b39faea6da89322bdf8c6be3cfd4 Mon Sep 17 00:00:00 2001
From: Jun Kurihara <junkurihara@users.noreply.github.com>
Date: Wed, 6 Jul 2022 08:29:38 +0900
Subject: [PATCH] fix log alt-svc

---
 src/constants.rs           |  3 +++
 src/proxy/proxy_handler.rs | 14 ++++++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/constants.rs b/src/constants.rs
index 30a8e48..45552b3 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -7,3 +7,6 @@ pub const MAX_CLIENTS: usize = 512;
 pub const MAX_CONCURRENT_STREAMS: u32 = 16;
 // #[cfg(feature = "tls")]
 pub const CERTS_WATCH_DELAY_SECS: u32 = 10;
+
+#[cfg(feature = "h3")]
+pub const H3_ALT_SVC_MAX_AGE: u32 = 60;
diff --git a/src/proxy/proxy_handler.rs b/src/proxy/proxy_handler.rs
index cb3dfbe..a82d489 100644
--- a/src/proxy/proxy_handler.rs
+++ b/src/proxy/proxy_handler.rs
@@ -1,6 +1,6 @@
 // Highly motivated by https://github.com/felipenoris/hyper-reverse-proxy
 use super::Proxy;
-use crate::{error::*, log::*};
+use crate::{constants::*, error::*, log::*};
 use hyper::{
   client::connect::Connect,
   header::{HeaderMap, HeaderValue},
@@ -112,9 +112,15 @@ where
     {
       if self.globals.http3 {
         if let Some(port) = self.globals.https_port {
-          res_backend
-            .headers_mut()
-            .insert("alt-svc", format!("h3=\":{}\"", port).parse().unwrap());
+          res_backend.headers_mut().insert(
+            hyper::header::ALT_SVC,
+            format!(
+              "h3=\":{}\"; ma={}, h3-29\":{}\"; ma={}",
+              port, H3_ALT_SVC_MAX_AGE, port, H3_ALT_SVC_MAX_AGE
+            )
+            .parse()
+            .unwrap(),
+          );
         }
       }
     }