fix: only look for fallback in parent dir on 404

If another error caused the file lookup to fail, bubble that error up
instead.

Author: wucke13

src/webserver/http.rs

@@ -463,18 +463,29 @@ async fn serve_fallback(
         // Check if `maybe_fallback_path` actually exists, if not, skip to the next round (which
         // will check `maybe_fallback_path`s parent directory for fallback handler).
         let mabye_sql_path = PathBuf::from(&fallback_path_candidate);
-        let Ok(sql_file) = app_state
+        match app_state
             .sql_file_cache
             .get_with_privilege(app_state, &mabye_sql_path, false)
             .await
-        else {
-            log::trace!("The 404 handler {mabye_sql_path:?} does not exist");
-            continue;
-        };
+        {
+            // `maybe_fallback_path` does seem to exist, lets try to run it!
+            Ok(sql_file) => {
+                log::debug!("Processing SQL request via fallback: {:?}", mabye_sql_path);
+                return render_sql(service_request, sql_file).await;
+            }
+            Err(e) => {
+                let actix_web_err = anyhow_err_to_actix(e);
 
-        // `maybe_fallback_path` does seem to exist, lets try to run it!
-        log::debug!("Processing SQL request via fallback: {:?}", mabye_sql_path);
-        return render_sql(service_request, sql_file).await;
+                // `maybe_fallback_path` does not exist, continue search in parent dir.
+                if actix_web_err.as_response_error().status_code() == StatusCode::NOT_FOUND {
+                    log::trace!("The 404 handler {mabye_sql_path:?} does not exist");
+                    continue;
+                }
+
+                // Another error occured, bubble it up!
+                return Err(actix_web_err);
+            }
+        }
     }
 
     log::debug!("There is no {catch_all:?} handler, this response is terminally failed");