From 1f1d25d1ecc34dca5d573c89d673dc634520df33 Mon Sep 17 00:00:00 2001
From: Julien Cretel <jub0bsinthecloud@gmail.com>
Date: Wed, 10 Apr 2024 14:34:47 +0200
Subject: [PATCH] http/httpguts: eschew UTF-8 decoding in ValidHeaderFieldName

---
 http/httpguts/httplex.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/http/httpguts/httplex.go b/http/httpguts/httplex.go
index cf96e583..9b4de940 100644
--- a/http/httpguts/httplex.go
+++ b/http/httpguts/httplex.go
@@ -197,8 +197,8 @@ func ValidHeaderFieldName(v string) bool {
 	if len(v) == 0 {
 		return false
 	}
-	for _, r := range v {
-		if !IsTokenRune(r) {
+	for i := 0; i < len(v); i++ {
+		if !isTokenTable[v[i]] {
 			return false
 		}
 	}