修改请求数据库方式

server/index.js

@@ -314,9 +314,6 @@ app.post('/api/sources', requireAuth, async (req, res) => {
     );
     const [rows] = await db.query('SELECT * FROM prometheus_sources WHERE id = ?', [result.insertId]);
     
-    // Trigger history preloading in background
-    setImmediate(() => preloadSourceHistory(url));
-    
     res.status(201).json(rows[0]);
   } catch (err) {
     console.error('Error adding source:', err);
@@ -560,47 +557,6 @@ app.get('*', (req, res) => {
   res.sendFile(path.join(__dirname, '..', 'public', 'index.html'));
 });
 
-// Preload history for all existing sources if table is empty
-async function initialPreload() {
-  if (!isDbInitialized) return;
-  try {
-    const [stats] = await db.query('SELECT COUNT(*) as count FROM traffic_stats');
-    if (stats[0].count === 0) {
-      console.log('[Initial Preloader] Database empty, preloading history for all sources...');
-      const [sources] = await db.query('SELECT * FROM prometheus_sources');
-      for (const source of sources) {
-        await preloadSourceHistory(source.url);
-      }
-    }
-  } catch (err) {
-    console.error('[Initial Preloader] Error:', err);
-  }
-}
-
-// Preload history for a new source
-async function preloadSourceHistory(url) {
-  if (!isDbInitialized) return;
-  console.log(`[History Preloader] Starting preloading for ${url}...`);
-  try {
-    const history = await prometheusService.getTrafficHistoryRange(url);
-    if (!history || history.length === 0) return;
-
-    for (const p of history) {
-      await db.query(`
-        INSERT INTO traffic_stats (timestamp, rx_bytes, tx_bytes, rx_bandwidth, tx_bandwidth)
-        VALUES (FROM_UNIXTIME(?), ?, ?, ?, ?)
-        ON DUPLICATE KEY UPDATE 
-          rx_bytes = rx_bytes + VALUES(rx_bytes),
-          tx_bytes = tx_bytes + VALUES(tx_bytes),
-          rx_bandwidth = rx_bandwidth + VALUES(rx_bandwidth),
-          tx_bandwidth = tx_bandwidth + VALUES(tx_bandwidth)
-      `, [p.ts, Math.round(p.rxBytes), Math.round(p.txBytes), p.rxBW, p.txBW]);
-    }
-    console.log(`[History Preloader] Successfully preloaded ${history.length} points for ${url}.`);
-  } catch (err) {
-    console.error(`[History Preloader] Error preloading ${url}:`, err.message);
-  }
-}
 
 async function recordTrafficStats() {
   if (!isDbInitialized) return;
@@ -655,9 +611,7 @@ async function recordTrafficStats() {
 }
 
 // Check and fix database integrity on startup
-checkAndFixDatabase().then(() => {
-  initialPreload();
-});
+checkAndFixDatabase();
 
 // Record traffic every 5 seconds (17,280 points/day)
 setInterval(recordTrafficStats, 5 * 1000);

server/prometheus-service.js

@@ -411,50 +411,6 @@ function mergeCpuHistories(histories) {
   };
 }
 
-/**
- * Get aggregated traffic history range for preloading (past 24h, 5-min intervals)
- */
-async function getTrafficHistoryRange(url) {
-  const now = Math.floor(Date.now() / 1000);
-  const start = now - 86400; // 24h ago
-  const step = 5; // 5 seconds (17,280 points for 24h)
-
-  const queries = [
-    'sum(node_network_receive_bytes_total{device!~"lo|veth.*|docker.*|br-.*"})',
-    'sum(node_network_transmit_bytes_total{device!~"lo|veth.*|docker.*|br-.*"})',
-    'sum(rate(node_network_receive_bytes_total{device!~"lo|veth.*|docker.*|br-.*"}[5m]))',
-    'sum(rate(node_network_transmit_bytes_total{device!~"lo|veth.*|docker.*|br-.*"}[5m]))'
-  ];
-
-  const results = await Promise.all(queries.map(q =>
-    queryRange(url, q, start, now, step).catch(() => [])
-  ));
-
-  const rxBytesRes = results[0];
-  const txBytesRes = results[1];
-  const rxBWRes = results[2];
-  const txBWRes = results[3];
-
-  // Map results by timestamp
-  const dataMap = new Map();
-
-  const process = (res, field) => {
-    if (res.length > 0 && res[0].values) {
-      for (const [ts, val] of res[0].values) {
-        const entry = dataMap.get(ts) || { ts, rxBytes: 0, txBytes: 0, rxBW: 0, txBW: 0 };
-        entry[field] = parseFloat(val) || 0;
-        dataMap.set(ts, entry);
-      }
-    }
-  };
-
-  process(rxBytesRes, 'rxBytes');
-  process(txBytesRes, 'txBytes');
-  process(rxBWRes, 'rxBW');
-  process(txBWRes, 'txBW');
-
-  return Array.from(dataMap.values());
-}
 
 module.exports = {
   testConnection,
@@ -464,6 +420,5 @@ module.exports = {
   getNetworkHistory,
   mergeNetworkHistories,
   getCpuHistory,
-  mergeCpuHistories,
-  getTrafficHistoryRange
+  mergeCpuHistories
 };