Fix response with empty producer

cmd/debug/debug.go

@@ -0,0 +1,27 @@
+package debug
+
+import (
+	"github.com/AlexxIT/go2rtc/cmd/api"
+	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"net/http"
+	"os"
+	"strconv"
+)
+
+func Init() {
+	api.HandleFunc("/api/stack", stackHandler)
+	api.HandleFunc("/api/exit", exitHandler)
+
+	streams.HandleFunc("null", nullHandler)
+}
+
+func exitHandler(_ http.ResponseWriter, r *http.Request) {
+	s := r.URL.Query().Get("code")
+	code, _ := strconv.Atoi(s)
+	os.Exit(code)
+}
+
+func nullHandler(string) (streamer.Producer, error) {
+	return nil, nil
+}