Node.Js Async Middelware

server.js

// server.js
//
const responseTime = require('response-time');
const express = require('express')
const app = express()


app.use(responseTime())


const backgroundAxiosMiddleware = async (req, res, next) => {
    const startTime = Date.now();

	  next()

    res.once('finish', () => {
       const endTime = Date.now();
       const responseTime = endTime - startTime;
       
       try {
         // Express request.
         console.log('Request BaseUrl:', req.baseUrl);
         console.log('Request OriginalUrl:', req.originalUrl);
         console.log('Request Method:', req.method);
         console.log('Request Hostname:', req.hostname);
         console.log('Request. IP:', req.ip);
         console.log('Request. User Agent:', req.get('User-Agent'));
         
         // Express response.
         console.log('Response Status Code:', res.statusCode);
         console.log('Response Status Message:', res.statusMessage);
         console.log(`Response time: ${responseTime}ms`);

        // Create an Axios instance
        const axios = require('axios');	

        // Asynchronously make a GET request using Axios in the background
        const responsePromise = axios.get('https://jsonplaceholder.typicode.com/posts');

        // Handle the response when it resolves
        responsePromise.then(response => {
          // Process the response as needed
          console.log('Axios endpoint called successfully')
        }).catch(error => {
          // Handle errors
          console.error('Background Axios error:', error);
        });
	
  } catch (error) {
    // Pass any errors to the Express error handling middleware
    next(error);
  }
 })
};

const anotherOnFinishMiddleware = (req, res, next) =>{
  next()
  
  res.once('finish', () => {
     console.log("Another Once Finish Call")
  })
}

app.use(anotherOnFinishMiddleware);
app.use(backgroundAxiosMiddleware);

app.get('/', (req, res) => {
    console.log("GET localhost:3000/");
    res.json({ message: 'Hello, JSON!' });
});
 
const PORT = 3000;
app.listen(PORT, () => {
    console.log(`Server at http://localhost:${PORT}`);
});