Fix Vaultwarden 429: add 5min server cache, slow widget poll

server/routes/vaultwarden.ts

@@ -6,6 +6,10 @@ const router = Router()
 let vwCookie: string | null = null
 let vwCookieExpiry = 0
 
+interface CacheEntry { data: unknown; ts: number }
+let statsCache: CacheEntry | null = null
+const CACHE_TTL = 5 * 60 * 1000 // 5 minutes
+
 async function getCookie(): Promise<string> {
   if (vwCookie && Date.now() < vwCookieExpiry) return vwCookie
 
@@ -38,6 +42,11 @@ router.get('/stats', async (_req, res) => {
     const host = process.env.VAULTWARDEN_HOST
     if (!host) { res.status(503).json({ error: 'VAULTWARDEN_HOST not configured' }); return }
 
+    if (statsCache && Date.now() - statsCache.ts < CACHE_TTL) {
+      res.json(statsCache.data)
+      return
+    }
+
     const cookie = await getCookie()
 
     const [usersRes, diagRes] = await Promise.all([
@@ -59,7 +68,7 @@ router.get('/stats', async (_req, res) => {
     const users: any[] = usersRes.data ?? []
     const diag = diagRes.data ?? {}
 
-    res.json({
+    const result = {
       version:          diag.version ?? null,
       signupsAllowed:   diag.config?.signups_allowed ?? null,
       userCount:        users.length,
@@ -73,7 +82,9 @@ router.get('/stats', async (_req, res) => {
         cipherCount: u.cipherCount ?? u.cipher_count ?? null,
         attachCount: u.attachmentCount ?? u.attachment_count ?? null,
       })),
-    })
+    }
+    statsCache = { data: result, ts: Date.now() }
+    res.json(result)
   } catch (err: unknown) {
     if (err instanceof Error && err.message.includes('login failed')) vwCookie = null
     const msg = err instanceof Error ? err.message : 'Unknown error'