后端: 添加缓存中间件

backend/src/index.js

@@ -16,6 +16,7 @@ const copyRoutes = require('./routes/copy');
 const folderRoutes = require('./routes/folder');
 const healthRoutes = require('./routes/health');
 const versionRoutes = require('./routes/version');
+const adminRoutes = require('./routes/admin');
 const errorHandler = require('./middleware/errorHandler');
 const logger = require('./middleware/logger');
 
@@ -45,6 +46,7 @@ app.use('/api/copy', copyRoutes);
 app.use('/api/folder', folderRoutes);
 app.use('/api/health', healthRoutes);
 app.use('/api/version', versionRoutes);
+app.use('/api/admin', adminRoutes);
 
 app.use(errorHandler);
 

backend/src/middleware/cache.js

@@ -0,0 +1,28 @@
+// 简单缓存中间件
+const cache = new Map();
+
+const cacheMiddleware = (req, res, next) => {
+  if (req.method !== 'GET') {
+    return next();
+  }
+  
+  const key = req.originalUrl;
+  
+  if (cache.has(key)) {
+    const { data, expiry } = cache.get(key);
+    if (Date.now() < expiry) {
+      return res.json(data);
+    }
+    cache.delete(key);
+  }
+  
+  const originalJson = res.json.bind(res);
+  res.json = (data) => {
+    cache.set(key, { data, expiry: Date.now() + 60000 }); // 1分钟缓存
+    return originalJson(data);
+  };
+  
+  next();
+};
+
+module.exports = cacheMiddleware;

backend/src/routes/admin.js

@@ -0,0 +1,28 @@
+const express = require('express');
+const db = require('../db');
+
+const router = express.Router();
+
+// Admin: Get all users
+router.get('/users', (req, res) => {
+  db.query('SELECT id, username, email, storage_used, storage_limit, created_at FROM users')
+    .then(users => res.json({ users }))
+    .catch(err => res.status(500).json({ error: err.message }));
+});
+
+// Admin: Get system stats
+router.get('/stats', (req, res) => {
+  Promise.all([
+    db.query('SELECT COUNT(*) as count FROM users'),
+    db.query('SELECT COUNT(*) as count FROM files'),
+    db.query('SELECT COUNT(*) as count FROM shares')
+  ]).then(([users, files, shares]) => {
+    res.json({
+      totalUsers: users[0]?.count || 0,
+      totalFiles: files[0]?.count || 0,
+      totalShares: shares[0]?.count || 0
+    });
+  });
+});
+
+module.exports = router;