jiebanke/backend/src/app.js

const express = require('express');
const cors = require('cors');
const helmet = require('helmet');
const morgan = require('morgan');
const rateLimit = require('express-rate-limit');
const xss = require('xss-clean');
const hpp = require('hpp');
const swaggerUi = require('swagger-ui-express');
const swaggerSpec = require('./config/swagger');

console.log('🔧 初始化Express应用...');

const { globalErrorHandler, notFound } = require('./utils/errors');

// 路由导入
const authRoutes = require('./routes/auth');
const userRoutes = require('./routes/user');
const travelRoutes = require('./routes/travel');
const animalRoutes = require('./routes/animal');
const orderRoutes = require('./routes/order');
const adminRoutes = require('./routes/admin'); // 新增管理员路由

const app = express();

console.log('✅ Express应用初始化完成');

// 安全中间件
app.use(helmet());

// CORS配置
app.use(cors({
  origin: process.env.NODE_ENV === 'production' 
    ? ['https://your-domain.com'] 
    : ['https://www.jiebanke.com', 'https://admin.jiebanke.com', 'https://api.jiebanke.com'],
  credentials: true
}));

// 请求日志
if (process.env.NODE_ENV === 'development') {
  app.use(morgan('dev'));
} else {
  app.use(morgan('combined'));
}

// 请求频率限制
const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15分钟
  max: process.env.NODE_ENV === 'production' ? 100 : 1000, // 生产环境100次，开发环境1000次
  message: {
    success: false,
    code: 429,
    message: '请求过于频繁，请稍后再试',
    timestamp: new Date().toISOString()
  }
});
app.use('/api', limiter);

// 请求体解析
app.use(express.json({ limit: '10kb' }));
app.use(express.urlencoded({ extended: true, limit: '10kb' }));

// 数据清洗
app.use(xss()); // 防止XSS攻击
app.use(hpp({ // 防止参数污染
  whitelist: [
    'page',
    'pageSize',
    'sort',
    'fields',
    'price',
    'rating',
    'distance'
  ]
}));

// 静态文件服务
app.use('/uploads', express.static('uploads'));

// Swagger文档路由
if (process.env.NODE_ENV === 'development' || process.env.ENABLE_SWAGGER === 'true') {
  app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerSpec));
  console.log('📚 Swagger文档已启用: https://api.jiebanke.com/api-docs');
}

// 健康检查路由
app.get('/health', (req, res) => {
  res.status(200).json({
    status: 'OK',
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    environment: process.env.NODE_ENV || 'development'
  });
});

// 系统统计路由
app.get('/system-stats', (req, res) => {
  const stats = {
    status: 'OK',
    timestamp: new Date().toISOString(),
    environment: process.env.NODE_ENV || 'development',
    nodeVersion: process.version,
    memoryUsage: process.memoryUsage(),
    uptime: process.uptime(),
    cpuCount: require('os').cpus().length,
    platform: process.platform,
    architecture: process.arch
  };
  
  res.status(200).json(stats);
});

// API路由
app.use('/api/v1/auth', authRoutes);
app.use('/api/v1/users', userRoutes);
app.use('/api/v1/travel', travelRoutes);
app.use('/api/v1/animals', animalRoutes);
app.use('/api/v1/orders', orderRoutes);
// 管理员路由
app.use('/api/v1/admin', adminRoutes);

// 404处理
app.use('*', notFound);

// 全局错误处理
app.use(globalErrorHandler);

console.log('✅ 应用配置完成');

module.exports = app;