From fb1177329cb740a69c9b26133c166c1f5725b235 Mon Sep 17 00:00:00 2001
From: puke <1129090915@qq.com>
Date: Thu, 28 Mar 2024 13:08:37 +0800
Subject: [PATCH] Fix bug when v is None

---
 src/h2/utilities.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/h2/utilities.py b/src/h2/utilities.py
index 3a7bf6e07..d5d525313 100644
--- a/src/h2/utilities.py
+++ b/src/h2/utilities.py
@@ -177,6 +177,8 @@ def authority_from_headers(headers):
         # user, so we may have unicode floating around in here. We only want
         # bytes.
         if n in (b':authority', u':authority'):
+            if v is None:
+                return None
             return v.encode('utf-8') if not isinstance(v, bytes) else v
 
     return None