From eebd6b1d10cd0c8ec6daf6d41244525f029a0894 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Wed, 8 Oct 2025 11:40:02 +0300
Subject: [PATCH] Ability to disable HTTP/2

---
 cmd/godlighty/main.go | 10 ++++++++++
 godlighty.go          |  2 +-
 tls.go                |  2 +-
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/cmd/godlighty/main.go b/cmd/godlighty/main.go
index 5ca0380..6cbba08 100644
--- a/cmd/godlighty/main.go
+++ b/cmd/godlighty/main.go
@@ -46,6 +46,7 @@ var (
 func main() {
 	bind := flag.String("bind", "[::]:80", "Address to bind and listen on")
 	doTLS := flag.Bool("tls", false, "Enable TLS")
+	noH2 := flag.Bool("no-h2", false, "Disable HTTP/2")
 	doSetUID := flag.Int("setuid", 0, "Set that UID after binding the socket")
 	doSetGID := flag.Int("setgid", 0, "Set that GID after binding the socket")
 	doSetGIDs := flag.String("setgids", "", "Comma-separated GIDs to set")
@@ -108,6 +109,15 @@ func main() {
 		Handler:           godlighty.MainHandler,
 		ReadHeaderTimeout: RWTimeout,
 		IdleTimeout:       time.Minute,
+		Protocols:         &http.Protocols{},
+	}
+	srv.Protocols.SetHTTP1(true)
+	if *noH2 {
+		godlighty.NextProtos = []string{"http/1.1"}
+	} else {
+		godlighty.NextProtos = []string{"h2", "http/1.1"}
+		srv.Protocols.SetHTTP2(true)
+		srv.Protocols.SetUnencryptedHTTP2(true)
 	}
 	go func() {
 		<-shutdown
diff --git a/godlighty.go b/godlighty.go
index 895b10c..834266e 100644
--- a/godlighty.go
+++ b/godlighty.go
@@ -1,6 +1,6 @@
 // Highly-customizable HTTP, HTTP/2, HTTPS server
 package godlighty
 
-const Version = "godlighty/0.9.0"
+const Version = "godlighty/0.10.0"
 
 var BindAddr string
diff --git a/tls.go b/tls.go
index 7ccc8f7..e42b06f 100644
--- a/tls.go
+++ b/tls.go
@@ -27,7 +27,7 @@ import (
 )
 
 var (
-	NextProtos = []string{"h2", "http/1.1"}
+	NextProtos []string
 
 	HostToECDSACertificate map[string]*tls.Certificate
 	HostECDSAClientAuth    map[string]*x509.CertPool
-- 
2.51.0