优化数据库稳定性

server/prometheus-service.js

@@ -876,10 +876,8 @@ module.exports = {
   getLatency: async (blackboxUrl, target) => {
     if (!blackboxUrl || !target) return null;
     try {
-      const normalized = blackboxUrl.trim().replace(/\/+$/, '');
+      const normalized = normalizeUrl(blackboxUrl);
       
-      // Construct a single optimized query searching for priority metrics and common labels
-      // Prioritize probe_icmp_duration_seconds OVER probe_duration_seconds
       const queryExpr = `(
         probe_icmp_duration_seconds{phase="rtt", instance="${target}"} or 
         probe_icmp_duration_seconds{phase="rtt", target="${target}"} or 
@@ -891,14 +889,9 @@ module.exports = {
         probe_duration_seconds{target="${target}"}
       )`;
       
-      const params = new URLSearchParams({ query: queryExpr });
-      const res = await fetch(`${normalized}/api/v1/query?${params.toString()}`);
-      
-      if (res.ok) {
-        const data = await res.json();
-        if (data.status === 'success' && data.data.result.length > 0) {
-          return parseFloat(data.data.result[0].value[1]) * 1000;
-        }
+      const result = await query(normalized, queryExpr);
+      if (result && result.length > 0) {
+        return parseFloat(result[0].value[1]) * 1000;
       }
       return null;
     } catch (err) {