🎨 Support HTTP/2 over HTTPS (#17500)

kernel/server/serve.go

@@ -241,12 +241,13 @@ func Serve(fastMode bool, cookieKey string) {
 		// 反代服务器启动失败不影响核心服务器启动
 	}()
 
+	httpHandler := ginServer.Handler()
 	util.HttpServer = &http.Server{
-		Handler: ginServer,
+		Handler: httpHandler,
 	}
 
 	if useTLS && (util.FixedPort == util.ServerPort || util.IsPortOpen(util.FixedPort)) {
-		if err = util.ServeMultiplexed(ln, ginServer, certPath, keyPath, util.HttpServer); err != nil {
+		if err = util.ServeMultiplexed(ln, httpHandler, certPath, keyPath, util.HttpServer); err != nil {
 			if errors.Is(err, http.ErrServerClosed) || errors.Is(err, cmux.ErrListenerClosed) {
 				return
 			}

kernel/util/cmux.go

@@ -24,6 +24,7 @@ func ServeMultiplexed(ln net.Listener, handler http.Handler, certPath, keyPath s
 
 	tlsConfig := &tls.Config{
 		Certificates: []tls.Certificate{cert},
+		NextProtos:   []string{"h2", "http/1.1"},
 	}
 
 	tlsListener := tls.NewListener(tlsL, tlsConfig)