fix

main.go

@@ -65,7 +65,6 @@ func (s *Server) handleSession(roomName string, sess *webtransport.Session) {
 		if err != nil {
 			return
 		}
-
 		go s.handleStream(room, sess, stream)
 	}
 }
@@ -84,14 +83,14 @@ func (s *Server) handleStream(room *Room, sender *webtransport.Session, stream *
 			if conn == sender {
 				continue
 			}
-			go func(c *webtransport.Session) {
+			go func(c *webtransport.Session, data []byte) {
 				out, err := c.OpenStream()
 				if err != nil {
 					return
 				}
 				defer out.Close()
-				out.Write(buf[:n])
-			}(conn)
+				out.Write(data)
+			}(conn, append([]byte(nil), buf[:n]...))
 		}
 		room.mu.Unlock()
 	}
@@ -112,6 +111,7 @@ func main() {
 		log.Fatal(err)
 	}
 
+	// Обязательно и h3, и http/1.1
 	tlsConf.NextProtos = []string{"h3", "http/1.1"}
 	tlsConf.MinVersion = tls.VersionTLS13
 
@@ -119,7 +119,14 @@ func main() {
 
 	mux := http.NewServeMux()
 
-	wtServer := &webtransport.Server{}
+	// WebTransport server поверх HTTP/3
+	wtServer := &webtransport.Server{
+		H3: &http3.Server{
+			Addr:      ":443",
+			TLSConfig: tlsConf,
+			Handler:   mux,
+		},
+	}
 
 	mux.HandleFunc("/room/", func(w http.ResponseWriter, r *http.Request) {
 		roomName := strings.TrimPrefix(r.URL.Path, "/room/")
@@ -133,27 +140,21 @@ func main() {
 		go server.handleSession(roomName, sess)
 	})
 
-	// HTTP/1.1 server (TCP 443)
+	log.Println("Relay running on https://" + domain + "/room/{room}")
+
+	// Запуск HTTP/3 + WebTransport (UDP 443)
+	go func() {
+		if err := wtServer.ListenAndServe(); err != nil {
+			log.Fatal(err)
+		}
+	}()
+
+	// Отдельный HTTPS сервер (TCP 443) для ACME challenge
 	httpServer := &http.Server{
 		Addr:      ":443",
 		TLSConfig: tlsConf,
 		Handler:   mux,
 	}
 
-	// HTTP/3 server (UDP 443)
-	h3Server := &http3.Server{
-		Addr:      ":443",
-		TLSConfig: tlsConf,
-		Handler:   mux,
-	}
-
-	log.Println("Relay running on https://" + domain + "/room/{room}")
-
-	// Запускаем HTTP/3
-	go func() {
-		log.Fatal(h3Server.ListenAndServe())
-	}()
-
-	// Запускаем HTTPS (TCP)
 	log.Fatal(httpServer.ListenAndServeTLS("", ""))
 }