修复延迟问题

server/index.js

@@ -910,13 +910,12 @@ app.put('/api/latency-routes/:id', requireAuth, async (req, res) => {
 app.get('/api/metrics/latency', async (req, res) => {
   try {
     const [routes] = await db.query(`
-      SELECT r.*, s.url 
+      SELECT r.*, s.url, s.type as source_type
       FROM latency_routes r 
       JOIN prometheus_sources s ON r.source_id = s.id
     `);
     
     if (routes.length === 0) {
-      // Return empty routes array instead of null for consistency
       return res.json({ routes: [] });
     }
 
@@ -924,8 +923,8 @@ app.get('/api/metrics/latency', async (req, res) => {
       // Try to get from Valkey first (filled by background latencyService)
       let latency = await cache.get(`latency:route:${route.id}`);
       
-      // Fallback if not in cache (maybe service just started or failed)
-      if (latency === null) {
+      // Fallback if not in cache (only for prometheus sources, blackbox sources rely on the background service)
+      if (latency === null && route.source_type === 'prometheus') {
         latency = await prometheusService.getLatency(route.url, route.latency_target);
       }
 

server/latency-service.js

@@ -38,7 +38,8 @@ async function pollLatency() {
                 const lines = response.data.split('\n');
                 
                 for (const line of lines) {
-                    if (line.match(/^probe_success\s+1/)) {
+                    // Match probe_success with optional labels: probe_success{...} 1
+                    if (line.match(/^probe_success({.*})?\s+1/)) {
                         success = true;
                         break;
                     }
@@ -48,8 +49,9 @@ async function pollLatency() {
                     // Try specialized metrics first for better accuracy
                     const priorityMetrics = ['probe_icmp_duration_seconds', 'probe_http_duration_seconds', 'probe_duration_seconds'];
                     for (const metricName of priorityMetrics) {
-                        // Support scientific notation (e.g. 1.23e-04)
-                        const regex = new RegExp(`^${metricName}(?:\\{.*\\})?\\s+([\\d.eE+-]+)`);
+                        // More robust regex: handle optional labels and scientific notation
+                        // Supports: metric_name{...} 1.23e-4 or metric_name 0.05
+                        const regex = new RegExp(`^${metricName}\\s*(?:\\{[^}]*\\})?\\s+([\\d.eE+-]+)`);
                         for (const line of lines) {
                             const match = line.match(regex);
                             if (match) {