feat: Initial commit of PDF Tools project

server/routes/files.js

@@ -0,0 +1,193 @@
+const express = require('express');
+const multer = require('multer');
+const path = require('path');
+const fs = require('fs');
+const { v4: uuidv4 } = require('uuid');
+const { optionalAuth } = require('../middleware/auth');
+
+const router = express.Router();
+
+// 确保上传目录存在
+const uploadDir = path.join(__dirname, '../uploads');
+if (!fs.existsSync(uploadDir)) {
+  fs.mkdirSync(uploadDir, { recursive: true });
+}
+
+// Multer配置
+const storage = multer.diskStorage({
+  destination: (req, file, cb) => {
+    cb(null, uploadDir);
+  },
+  filename: (req, file, cb) => {
+    const uniqueName = `${uuidv4()}-${file.originalname}`;
+    cb(null, uniqueName);
+  }
+});
+
+const fileFilter = (req, file, cb) => {
+  // 检查文件类型
+  if (file.mimetype === 'application/pdf') {
+    cb(null, true);
+  } else {
+    cb(new Error('只支持PDF文件格式'), false);
+  }
+};
+
+const upload = multer({
+  storage,
+  fileFilter,
+  limits: {
+    fileSize: 50 * 1024 * 1024, // 50MB限制
+  }
+});
+
+// 上传文件
+router.post('/upload', optionalAuth, upload.single('file'), async (req, res) => {
+  try {
+    if (!req.file) {
+      return res.status(400).json({
+        success: false,
+        message: '未找到上传的文件'
+      });
+    }
+
+    const fileInfo = {
+      fileId: uuidv4(),
+      originalName: req.file.originalname,
+      fileName: req.file.filename,
+      fileSize: req.file.size,
+      mimeType: req.file.mimetype,
+      uploadTime: new Date(),
+      userId: req.user?.userId || null,
+      filePath: req.file.path
+    };
+
+    // 这里应该保存到数据库
+    // await FileModel.create(fileInfo);
+
+    res.json({
+      success: true,
+      message: '文件上传成功',
+      data: {
+        fileId: fileInfo.fileId,
+        originalName: fileInfo.originalName,
+        fileSize: fileInfo.fileSize,
+        uploadTime: fileInfo.uploadTime
+      }
+    });
+
+  } catch (error) {
+    console.error('文件上传错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '文件上传失败'
+    });
+  }
+});
+
+// 获取文件信息
+router.get('/:fileId', optionalAuth, async (req, res) => {
+  try {
+    const { fileId } = req.params;
+
+    // 这里应该从数据库查询
+    // const file = await FileModel.findOne({ fileId });
+    
+    // 模拟数据
+    const file = {
+      fileId,
+      originalName: '示例文档.pdf',
+      fileSize: 2048576,
+      mimeType: 'application/pdf',
+      uploadTime: new Date(),
+      status: 'ready'
+    };
+
+    if (!file) {
+      return res.status(404).json({
+        success: false,
+        message: '文件未找到'
+      });
+    }
+
+    res.json({
+      success: true,
+      data: file
+    });
+
+  } catch (error) {
+    console.error('获取文件信息错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '获取文件信息失败'
+    });
+  }
+});
+
+// 删除文件
+router.delete('/:fileId', optionalAuth, async (req, res) => {
+  try {
+    const { fileId } = req.params;
+
+    // 这里应该从数据库查询文件信息
+    // const file = await FileModel.findOne({ fileId });
+    
+    // 删除物理文件
+    const uploadDir = path.join(__dirname, '../uploads');
+    const files = fs.readdirSync(uploadDir);
+    const targetFile = files.find(file => file.includes(fileId));
+    
+    if (targetFile) {
+      fs.unlinkSync(path.join(uploadDir, targetFile));
+    }
+
+    // 从数据库删除记录
+    // await FileModel.deleteOne({ fileId });
+
+    res.json({
+      success: true,
+      message: '文件删除成功'
+    });
+
+  } catch (error) {
+    console.error('删除文件错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '删除文件失败'
+    });
+  }
+});
+
+// 下载文件
+router.get('/download/:fileName', (req, res) => {
+  try {
+    const { fileName } = req.params;
+    const filePath = path.join(uploadDir, fileName);
+
+    if (!fs.existsSync(filePath)) {
+      return res.status(404).json({
+        success: false,
+        message: '文件不存在'
+      });
+    }
+
+    res.download(filePath, (err) => {
+      if (err) {
+        console.error('文件下载错误:', err);
+        res.status(500).json({
+          success: false,
+          message: '文件下载失败'
+        });
+      }
+    });
+
+  } catch (error) {
+    console.error('下载文件错误:', error);
+    res.status(500).json({
+      success: false,
+      message: '下载文件失败'
+    });
+  }
+});
+
+module.exports = router;