From 9eade3e3e6676c20156188b4c2081be22fffd678 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=96=BB=E5=8B=87=E7=A5=A5?= <237899745@qq.com>
Date: Tue, 11 Nov 2025 15:24:39 +0800
Subject: [PATCH] =?UTF-8?q?=E6=80=A7=E8=83=BD:=20=E4=BC=98=E5=8C=96?=
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问题：
- /api/admin/storage-stats 使用 execSync 同步执行 df/wmic 命令
- 同步执行会阻塞事件循环，影响并发请求处理
- 磁盘信息获取可能需要几百毫秒，影响响应速度

优化内容：
1. 导入 util.promisify 将 exec 转换为异步函数
2. 将路由处理函数改为 async
3. 使用 execAsync 替代 execSync 执行 df 命令
4. 使用 execAsync 替代 execSync 执行 wmic 命令

优势：
- 不阻塞事件循环，提升并发性能
- 管理员查看存储统计时不影响其他用户操作
- 更符合 Node.js 最佳实践
---
 backend/server.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/backend/server.js b/backend/server.js
index c5865cf..4ef0d64 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -10,7 +10,9 @@ const path = require('path');
 const fs = require('fs');
 const { body, validationResult } = require('express-validator');
 const archiver = require('archiver');
-const { execSync } = require('child_process');
+const { exec, execSync } = require('child_process');
+const util = require('util');
+const execAsync = util.promisify(exec);
 
 const { db, UserDB, ShareDB, SettingsDB, PasswordResetDB } = require('./database');
 const { generateToken, authMiddleware, adminMiddleware } = require('./auth');
@@ -1775,7 +1777,7 @@ app.post('/api/admin/settings', authMiddleware, adminMiddleware, (req, res) => {
 });
 
 // 获取服务器存储统计信息
-app.get('/api/admin/storage-stats', authMiddleware, adminMiddleware, (req, res) => {
+app.get('/api/admin/storage-stats', authMiddleware, adminMiddleware, async (req, res) => {
   try {
     // 获取本地存储目录
     const localStorageDir = path.join(__dirname, 'local-storage');
@@ -1787,7 +1789,7 @@ app.get('/api/admin/storage-stats', authMiddleware, adminMiddleware, (req, res)
     
     try {
       // 获取本地存储目录所在分区的磁盘信息
-      const dfOutput = execSync(`df -B 1 / | tail -1`, { encoding: 'utf8' });
+      const { stdout: dfOutput } = await execAsync(`df -B 1 / | tail -1`, { encoding: 'utf8' });
       const parts = dfOutput.trim().split(/\s+/);
       
       if (parts.length >= 4) {
@@ -1801,7 +1803,7 @@ app.get('/api/admin/storage-stats', authMiddleware, adminMiddleware, (req, res)
       try {
         // 获取本地存储目录所在的驱动器号
         const driveLetter = localStorageDir.charAt(0);
-        const wmicOutput = execSync(`wmic logicaldisk where "DeviceID='${driveLetter}:'" get Size,FreeSpace /value`, { encoding: 'utf8' });
+        const { stdout: wmicOutput } = await execAsync(`wmic logicaldisk where "DeviceID='' + driveLetter + '':''" get Size,FreeSpace /value`, { encoding: 'utf8' });
         
         const freeMatch = wmicOutput.match(/FreeSpace=(\d+)/);
         const sizeMatch = wmicOutput.match(/Size=(\d+)/);