From 1a0acbea4487a876fa81edb875d3833610ccb7a8 Mon Sep 17 00:00:00 2001
From: Frank Denis <you@example.com>
Date: Thu, 9 Jul 2020 20:24:58 +0200
Subject: [PATCH] Add stale-if-error and max-stale

---
 src/libdoh/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libdoh/src/lib.rs b/src/libdoh/src/lib.rs
index 7a8c56a..0060157 100644
--- a/src/libdoh/src/lib.rs
+++ b/src/libdoh/src/lib.rs
@@ -212,7 +212,7 @@ impl DoH {
             .header(hyper::header::CONTENT_TYPE, "application/dns-message")
             .header(
                 hyper::header::CACHE_CONTROL,
-                format!("max-age={}, stale-while-revalidate={}", ttl, ttl).as_str(),
+                format!("max-age={}, max-stale={}, stale-while-revalidate={}, stale-if-error={}", ttl, ttl, ttl, ttl).as_str(),
             )
             .body(Body::from(packet))
             .unwrap();