ExpressJS+TypeScript如何获取请求上下文

import express from 'express';

const app = express();
const port = 3000;

app.listen(port, () => {
  console.log(`Server is running on http://localhost:${port}`);
});

import { Request, Response, NextFunction } from 'express';

const requestContextMiddleware = (req: Request, res: Response, next: NextFunction) => {
  // 在这里你可以访问请求上下文
  console.log('Request URL:', req.url);
  console.log('Request Method:', req.method);
  console.log('Request Headers:', req.headers);

  // 你可以将一些信息添加到请求对象中，以便后续中间件或路由处理器使用
  req.context = {
    userId: 'someUserId', // 示例：从请求头或认证信息中获取的用户ID
    timestamp: new Date().toISOString(),
  };

  // 调用下一个中间件
  next();
};

app.use(requestContextMiddleware);

app.get('/', (req: Request, res: Response) => {
  res.send(`Hello, your user ID is ${req.context.userId} and the request was made at ${req.context.timestamp}`);
});

import express from 'express';
import { Request, Response, NextFunction } from 'express';

const app = express();
const port = 3000;

const requestContextMiddleware = (req: Request, res: Response, next: NextFunction) => {
  console.log('Request URL:', req.url);
  console.log('Request Method:', req.method);
  console.log('Request Headers:', req.headers);

  req.context = {
    userId: 'someUserId',
    timestamp: new Date().toISOString(),
  };

  next();
};

app.use(requestContextMiddleware);

app.get('/', (req: Request, res: Response) => {
  res.send(`Hello, your user ID is ${req.context.userId} and the request was made at ${req.context.timestamp}`);
});

app.listen(port, () => {
  console.log(`Server is running on http://localhost:${port}`);
});