向不同端口上的Nodejs/Expressjs服务器发出Axios请求

// 安装 axios 和 express
// npm install axios express

const express = require('express');
const axios = require('axios');

// 创建一个 Express 应用
const app = express();
const port = 3000;

app.get('/data', (req, res) => {
  res.json({ message: 'Hello from server!' });
});

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

// 在另一个端口上创建第二个 Express 应用
const app2 = express();
const port2 = 3001;

app2.get('/data', (req, res) => {
  res.json({ message: 'Hello from another server!' });
});

app2.listen(port2, () => {
  console.log(`Second server running at http://localhost:${port2}`);
});

// 使用 Axios 发送请求到两个不同的服务器
axios.get(`http://localhost:${port}/data`)
  .then(response => {
    console.log('Response from first server:', response.data);
  })
  .catch(error => {
    console.error('Error from first server:', error);
  });

axios.get(`http://localhost:${port2}/data`)
  .then(response => {
    console.log('Response from second server:', response.data);
  })
  .catch(error => {
    console.error('Error from second server:', error);
  });

const cors = require('cors');

app.use(cors());

app.get('/data', cors(), (req, res) => {
  res.json({ message: 'Hello from server!' });
});