feat: Initial commit of PDF Tools project

server/routes/system.js

@@ -0,0 +1,279 @@
+const express = require('express');
+const os = require('os');
+const fs = require('fs');
+const path = require('path');
+
+const router = express.Router();
+
+// 系统健康检查
+router.get('/health', (req, res) => {
+  try {
+    const uptime = process.uptime();
+    const memoryUsage = process.memoryUsage();
+    const cpuUsage = process.cpuUsage();
+
+    const healthData = {
+      status: 'OK',
+      timestamp: new Date().toISOString(),
+      uptime: {
+        seconds: Math.floor(uptime),
+        readable: formatUptime(uptime)
+      },
+      memory: {
+        rss: formatBytes(memoryUsage.rss),
+        heapTotal: formatBytes(memoryUsage.heapTotal),
+        heapUsed: formatBytes(memoryUsage.heapUsed),
+        external: formatBytes(memoryUsage.external)
+      },
+      cpu: {
+        user: cpuUsage.user,
+        system: cpuUsage.system
+      },
+      system: {
+        platform: os.platform(),
+        arch: os.arch(),
+        nodeVersion: process.version,
+        totalMemory: formatBytes(os.totalmem()),
+        freeMemory: formatBytes(os.freemem()),
+        loadAverage: os.loadavg(),
+        cpuCount: os.cpus().length
+      }
+    };
+
+    res.json(healthData);
+
+  } catch (error) {
+    console.error('健康检查错误:', error);
+    res.status(500).json({
+      status: 'ERROR',
+      message: '系统健康检查失败',
+      timestamp: new Date().toISOString()
+    });
+  }
+});
+
+// 系统统计信息
+router.get('/stats', (req, res) => {
+  try {
+    const uploadDir = path.join(__dirname, '../uploads');
+    let filesCount = 0;
+    let totalSize = 0;
+
+    if (fs.existsSync(uploadDir)) {
+      const files = fs.readdirSync(uploadDir);
+      filesCount = files.length;
+      
+      files.forEach(file => {
+        const filePath = path.join(uploadDir, file);
+        const stats = fs.statSync(filePath);
+        totalSize += stats.size;
+      });
+    }
+
+    const statsData = {
+      files: {
+        count: filesCount,
+        totalSize: formatBytes(totalSize)
+      },
+      conversions: {
+        total: 0, // 这里应该从数据库查询
+        successful: 0,
+        failed: 0,
+        inProgress: 0
+      },
+      users: {
+        total: 0, // 这里应该从数据库查询
+        active: 0,
+        newToday: 0
+      },
+      performance: {
+        averageConversionTime: '0s',
+        queueLength: 0,
+        errorRate: '0%'
+      }
+    };
+
+    res.json({
+      success: true,
+      data: statsData,
+      timestamp: new Date().toISOString()
+    });
+
+  } catch (error) {
+    console.error('获取系统统计错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '获取系统统计失败'
+    });
+  }
+});
+
+// 支持的格式信息
+router.get('/formats', (req, res) => {
+  try {
+    const supportedFormats = {
+      input: [
+        {
+          format: 'pdf',
+          mimeType: 'application/pdf',
+          description: 'PDF文档',
+          maxSize: '50MB'
+        }
+      ],
+      output: [
+        {
+          format: 'docx',
+          mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+          description: 'Microsoft Word文档',
+          features: ['保持布局', '提取图片', 'OCR支持']
+        },
+        {
+          format: 'html',
+          mimeType: 'text/html',
+          description: 'HTML网页',
+          features: ['响应式设计', '嵌入图片', 'CSS框架']
+        },
+        {
+          format: 'txt',
+          mimeType: 'text/plain',
+          description: '纯文本',
+          features: ['提取文本', '保留换行', '字符编码']
+        },
+        {
+          format: 'png',
+          mimeType: 'image/png',
+          description: 'PNG图片',
+          features: ['高质量', '透明背景', '无损压缩']
+        },
+        {
+          format: 'jpg',
+          mimeType: 'image/jpeg',
+          description: 'JPEG图片',
+          features: ['压缩率高', '质量可调', '广泛支持']
+        }
+      ]
+    };
+
+    res.json({
+      success: true,
+      data: supportedFormats
+    });
+
+  } catch (error) {
+    console.error('获取格式信息错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '获取格式信息失败'
+    });
+  }
+});
+
+// 系统配置信息
+router.get('/config', (req, res) => {
+  try {
+    const config = {
+      upload: {
+        maxFileSize: '50MB',
+        allowedTypes: ['application/pdf'],
+        uploadDir: process.env.UPLOAD_DIR || './uploads'
+      },
+      conversion: {
+        timeout: process.env.CONVERSION_TIMEOUT || 300000,
+        maxConcurrent: process.env.MAX_CONCURRENT_CONVERSIONS || 5,
+        queueLimit: 100
+      },
+      security: {
+        rateLimiting: process.env.ENABLE_RATE_LIMITING === 'true',
+        rateLimit: {
+          window: process.env.RATE_LIMIT_WINDOW || 900000,
+          max: process.env.RATE_LIMIT_MAX || 100
+        }
+      },
+      features: {
+        userRegistration: true,
+        batchConversion: true,
+        previewSupport: false,
+        cloudStorage: false
+      }
+    };
+
+    res.json({
+      success: true,
+      data: config
+    });
+
+  } catch (error) {
+    console.error('获取系统配置错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '获取系统配置失败'
+    });
+  }
+});
+
+// 清理临时文件
+router.post('/cleanup', (req, res) => {
+  try {
+    const uploadDir = path.join(__dirname, '../uploads');
+    const maxAge = 24 * 60 * 60 * 1000; // 24小时
+    const now = Date.now();
+    let cleanedCount = 0;
+    let cleanedSize = 0;
+
+    if (fs.existsSync(uploadDir)) {
+      const files = fs.readdirSync(uploadDir);
+      
+      files.forEach(file => {
+        const filePath = path.join(uploadDir, file);
+        const stats = fs.statSync(filePath);
+        
+        if (now - stats.mtime.getTime() > maxAge) {
+          cleanedSize += stats.size;
+          fs.unlinkSync(filePath);
+          cleanedCount++;
+        }
+      });
+    }
+
+    res.json({
+      success: true,
+      message: '临时文件清理完成',
+      data: {
+        cleanedFiles: cleanedCount,
+        freedSpace: formatBytes(cleanedSize)
+      }
+    });
+
+  } catch (error) {
+    console.error('清理临时文件错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '清理临时文件失败'
+    });
+  }
+});
+
+// 辅助函数：格式化字节大小
+function formatBytes(bytes, decimals = 2) {
+  if (bytes === 0) return '0 Bytes';
+
+  const k = 1024;
+  const dm = decimals < 0 ? 0 : decimals;
+  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
+
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
+}
+
+// 辅助函数：格式化运行时间
+function formatUptime(uptime) {
+  const days = Math.floor(uptime / 86400);
+  const hours = Math.floor((uptime % 86400) / 3600);
+  const minutes = Math.floor((uptime % 3600) / 60);
+  const seconds = Math.floor(uptime % 60);
+
+  return `${days}d ${hours}h ${minutes}m ${seconds}s`;
+}
+
+module.exports = router;