fix more info

Cargo.lock

@@ -1590,7 +1590,7 @@ dependencies = [
 
 [[package]]
 name = "rs_maps"
-version = "0.3.1"
+version = "0.3.2"
 dependencies = [
  "anyhow",
  "argon2",

Cargo.toml

@@ -1,7 +1,7 @@
 # Cargo.toml
 [package]
 name = "rs_maps"
-version = "0.3.1"
+version = "0.3.2"
 edition = "2021"
 
 [dependencies]

frontend/app.js

@@ -26,7 +26,19 @@ const NOMINATIM = 'https://nominatim.openstreetmap.org/search';
 // Nominatim's search endpoint doesn't return object tags, so opening hours,
 // phone and website need a second lookup by OSM id. Overpass is donated
 // infrastructure like Nominatim: fine on an explicit click, not per result.
-const OVERPASS = 'https://overpass-api.de/api/interpreter';
+//
+// Tried in order. The main overpass-api.de instance is by far the busiest and
+// returns 504 under load even for a trivial single-object query, so the mirrors
+// are a practical necessity rather than belt and braces.
+const OVERPASS_ENDPOINTS = [
+  'https://overpass.kumi.systems/api/interpreter',
+  'https://overpass-api.de/api/interpreter',
+  'https://overpass.private.coffee/api/interpreter',
+];
+
+// Past this, move on to the next mirror. A single-object lookup that hasn't
+// answered in 8s isn't going to.
+const OVERPASS_TIMEOUT_MS = 8000;
 
 const COLOURS = ['#4E9C6B', '#D2467F', '#E2A93C', '#4E8FC9', '#B07BD4', '#D3574B'];
 const DEFAULT_COLOUR = COLOURS[0];
@@ -693,16 +705,38 @@ async function fetchOsmTags(osmType, osmId) {
   const short = OSM_SHORT[osmType];
   if (!short) return null;
 
-  const query = `[out:json][timeout:20];${short}(${osmId});out tags;`;
-  const res = await fetch(OVERPASS, {
+  const query = `[out:json][timeout:10];${short}(${osmId});out tags;`;
+  let lastError = null;
+
+  for (const endpoint of OVERPASS_ENDPOINTS) {
+    // AbortController rather than relying on the server: a hung connection
+    // would otherwise block the fallback for as long as the browser allows.
+    const abort = new AbortController();
+    const timer = setTimeout(() => abort.abort(), OVERPASS_TIMEOUT_MS);
+
+    try {
+      const res = await fetch(endpoint, {
         method: 'POST',
         headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
         body: 'data=' + encodeURIComponent(query),
+        signal: abort.signal,
       });
+
+      // 429 and 504 mean this mirror is busy, not that the object is missing —
+      // worth asking someone else.
       if (!res.ok) throw new Error('overpass ' + res.status);
 
       const body = await res.json();
       return (body.elements && body.elements[0] && body.elements[0].tags) || {};
+    } catch (err) {
+      lastError = err;
+      console.warn('overpass mirror failed:', endpoint, err.message);
+    } finally {
+      clearTimeout(timer);
+    }
+  }
+
+  throw lastError || new Error('no overpass endpoint responded');
 }
 
 /* Renders whatever came back. Deliberately raw values — no "open now", no
@@ -875,7 +909,10 @@ function showSearchHit(hit) {
         } catch {
           more.disabled = false;
           more.textContent = 'More details';
-          toast('Could not load details right now', true);
+          // Every mirror was busy or unreachable. This is a load problem at
+          // their end, not missing data — worth saying so, since retrying in a
+          // minute usually works.
+          toast('OpenStreetMap details are busy — try again shortly', true);
         }
         popup.update();   // re-measure after the content grew
       });