如何通过socket.io使用nodejs rest api？

npm install socket.io

const express = require('express');
const app = express();
const http = require('http').Server(app);
const io = require('socket.io')(http);

app.get('/api/data', (req, res) => {
  // 处理GET请求并返回数据
  const data = { message: 'Hello, world!' };
  res.json(data);
});

io.on('connection', (socket) => {
  // 当客户端连接成功时触发
  console.log('A client connected.');

  // 发送REST API请求
  const apiUrl = 'http://localhost:3000/api/data'; // 替换为你的REST API的URL
  http.get(apiUrl, (apiRes) => {
    let rawData = '';
    apiRes.on('data', (chunk) => {
      rawData += chunk;
    });
    apiRes.on('end', () => {
      const data = JSON.parse(rawData);
      // 将获取到的数据发送给客户端
      socket.emit('apiData', data);
    });
  });
});

<script src="https://cdn.socket.io/socket.io-3.1.3.min.js"></script>
<script>
  const socket = io();

  // 监听服务器发送的数据
  socket.on('apiData', (data) => {
    console.log('Received data:', data);
    // 在页面上展示数据
    document.getElementById('data').innerHTML = data.message;
  });
</script>

<div id="data"></div>