feat: Initial commit of PDF Tools project

server/middleware/auth.js

@@ -0,0 +1,42 @@
+const jwt = require('jsonwebtoken');
+
+const auth = (req, res, next) => {
+  try {
+    const token = req.header('Authorization')?.replace('Bearer ', '');
+    
+    if (!token) {
+      return res.status(401).json({
+        success: false,
+        message: '未提供访问令牌'
+      });
+    }
+
+    const decoded = jwt.verify(token, process.env.JWT_SECRET);
+    req.user = decoded;
+    next();
+  } catch (error) {
+    res.status(401).json({
+      success: false,
+      message: '无效的访问令牌'
+    });
+  }
+};
+
+// 可选身份验证中间件
+const optionalAuth = (req, res, next) => {
+  try {
+    const token = req.header('Authorization')?.replace('Bearer ', '');
+    
+    if (token) {
+      const decoded = jwt.verify(token, process.env.JWT_SECRET);
+      req.user = decoded;
+    }
+    
+    next();
+  } catch (error) {
+    // 忽略错误，继续执行
+    next();
+  }
+};
+
+module.exports = { auth, optionalAuth };

server/middleware/errorHandler.js

@@ -0,0 +1,52 @@
+const errorHandler = (err, req, res, next) => {
+  console.error('错误详情:', err);
+
+  // 默认错误信息
+  let error = { ...err };
+  error.message = err.message;
+
+  // MongoDB错误处理
+  if (err.name === 'CastError') {
+    const message = '资源未找到';
+    error = { message, statusCode: 404 };
+  }
+
+  // MongoDB重复键错误
+  if (err.code === 11000) {
+    const message = '资源已存在';
+    error = { message, statusCode: 400 };
+  }
+
+  // MongoDB验证错误
+  if (err.name === 'ValidationError') {
+    const message = Object.values(err.errors).map(val => val.message).join(', ');
+    error = { message, statusCode: 400 };
+  }
+
+  // 文件上传错误
+  if (err.code === 'LIMIT_FILE_SIZE') {
+    const message = '文件大小超出限制';
+    error = { message, statusCode: 400 };
+  }
+
+  // JWT错误
+  if (err.name === 'JsonWebTokenError') {
+    const message = '无效的访问令牌';
+    error = { message, statusCode: 401 };
+  }
+
+  // JWT过期错误
+  if (err.name === 'TokenExpiredError') {
+    const message = '访问令牌已过期';
+    error = { message, statusCode: 401 };
+  }
+
+  res.status(error.statusCode || 500).json({
+    success: false,
+    message: error.message || '服务器内部错误',
+    timestamp: new Date().toISOString(),
+    ...(process.env.NODE_ENV === 'development' && { stack: err.stack })
+  });
+};
+
+module.exports = errorHandler;