refactor(h2c): h2c use net/http

Author: qianlongzt

go.mod

@@ -27,7 +27,6 @@ require (
 	go.etcd.io/bbolt v1.4.0
 	golang.org/x/crypto/x509roots/fallback v0.0.0-20240916204253-42ee18b96377
 	golang.org/x/image v0.24.0
-	golang.org/x/net v0.35.0
 )
 
 require (
@@ -45,6 +44,7 @@ require (
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/samber/lo v1.47.0 // indirect
 	github.com/samber/slog-common v0.18.1 // indirect
+	golang.org/x/net v0.35.0 // indirect
 	golang.org/x/sys v0.30.0 // indirect
 	golang.org/x/text v0.22.0 // indirect
 )

web/listener.go

@@ -2,7 +2,6 @@ package web
 
 import (
 	"context"
-	"crypto/tls"
 	"errors"
 	"fmt"
 	"log/slog"
@@ -12,8 +11,6 @@ import (
 	"github.com/coreos/go-systemd/v22/activation"
 	"github.com/librespeed/speedtest/config"
 	"github.com/pires/go-proxyproto"
-	"golang.org/x/net/http2"
-	"golang.org/x/net/http2/h2c"
 )
 
 func startListener(ctx context.Context, conf *config.Config, r http.Handler) error {
@@ -65,27 +62,24 @@ func startListener(ctx context.Context, conf *config.Config, r http.Handler) err
 	srv := &http.Server{
 		Handler: r,
 	}
+	srv.Protocols = new(http.Protocols)
+	srv.Protocols.SetHTTP1(true)
+
 	var listenFn func() error
 	// TLS and HTTP/2.
 	if conf.EnableTLS {
 		slog.Info("Use TLS connection")
-
-		if !conf.EnableHTTP2 {
-			// If TLSNextProto is not nil, HTTP/2 support is not enabled automatically.
-			srv.TLSNextProto = make(map[string]func(*http.Server, *tls.Conn, http.Handler))
+		if conf.EnableHTTP2 {
+			slog.Info("Use HTTP2 connection.")
+			srv.Protocols.SetHTTP2(conf.EnableHTTP2)
 		}
 		listenFn = func() error {
 			return srv.ServeTLS(listener, conf.TLSCertFile, conf.TLSKeyFile)
 		}
 	} else {
 		if conf.EnableHTTP2 {
 			slog.Info("Use HTTP2 connection.")
-			h2s := &http2.Server{}
-			srv.Handler = h2c.NewHandler(r, h2s)
-			err = http2.ConfigureServer(srv, h2s)
-			if err != nil {
-				return fmt.Errorf("http2.ConfigureServer: %s", err)
-			}
+			srv.Protocols.SetUnencryptedHTTP2(conf.EnableHTTP2)
 		}
 		listenFn = func() error {
 			return srv.Serve(listener)