support .well-known dir

cmd/serve.go

@@ -48,7 +48,7 @@ var serveCmd = &cobra.Command{
 			Branch: branch,
 		}
 
-		s, err := lib.UseAPI(bind, f)
+		s, err := lib.UseAPI(bind, viper.GetString("well-known"), f)
 		if err != nil {
 			fmt.Println("cannot create server: ", err)
 			return
@@ -82,5 +82,6 @@ func init() {
 	f.StringP("server", "s", "", "Forgejo server address")
 	f.StringP("token", "k", "", "Forgejo api token")
 	f.StringP("branch", "b", "static-pages", "branch to use")
+	f.StringP("well-known", "w", "/.well-known", "well-known path, used by LetsEncrypt")
 	viper.BindPFlags(f)
 }

lib/web.go

@@ -54,13 +54,24 @@ func (f *Forgejo) GetFile(ctx context.Context, headers map[string]string, user,
 	return resp, nil
 }
 
-func UseAPI(bind string, f *Forgejo) (*http.Server, error) {
+func UseAPI(bind, wellKnown string, f *Forgejo) (*http.Server, error) {
 	if f == nil {
 		return nil, errors.New("forgejo is nil")
 	}
+	mux := http.NewServeMux()
+	if wellKnown != "" {
+		mux.Handle(
+			"/.well-known/",
+			http.StripPrefix(
+				"/.well-known/",
+				http.FileServer(http.Dir(wellKnown)),
+			),
+		)
+	}
+	mux.HandleFunc("/", f.handle)
 	s := &http.Server{
 		Addr:    bind,
-		Handler: http.HandlerFunc(f.handle),
+		Handler: mux,
 	}
 	return s, nil
 }