src/server/server.go

@@ -189,6 +189,7 @@ type PageData struct {
 	Title       string
 	Version     string
 	Expirations []int
+	Expiration  int
 	Languages   []string
 	Err         error
 	URL         string
@@ -426,6 +427,7 @@ func (s *Server) Start() error {
 	p := PageData{
 		Title:       s.config.Title,
 		Expirations: s.config.Expirations,
+		Expiration:  s.config.Expiration,
 		Languages:   s.config.Languages,
 	}
 

src/server/templates/index.html

@@ -36,9 +36,9 @@
                 </div>
                 <div class="col">
                     <select class="form-select" aria-label="Expiration" id="expiration" name="expiration">
-                        <option selected="selected" disabled>Expiration</option>
-                        {{range .Expirations}}
-                        <option value="{{.}}">{{HumanDuration .}}</option>
+                        <option disabled>Expiration</option>
+                        {{range $exp := .Expirations}}
+                        <option {{ if eq $exp $.Expiration }}selected="selected"{{end}} value="{{$exp}}">{{HumanDuration $exp}}</option>
                         {{end}}
                     </select>
                 </div>