/Javascript/Node.js/How to create response time router node js

How to create response time router node js

const app = require('express')();
 const bodyParser = require('body-parser');
 const { EventEmitter } = require('events');
 
 // Aggregate all profiler results into an event emitter to make
 // handling the results generic
 const profiles = new EventEmitter();
 
 profiles.on('middleware', ({ req, name, elapsedMS }) => {
   console.log(req.method, req.url, ':', name, `${elapsedMS}ms`);
 });
 
 app.use(wrap(function block(req, res, next) {
   setTimeout(() => next(), 1000);
 }));
 
 app.use(wrap(bodyParser.json()));
 
 app.post('*', function(req, res) {
   res.send('Hello, world!');
 });
 
 app.listen(3000);
 
 function wrap(fn) {
   return function(req, res, next) {
     const start = Date.now();
     fn(req, res, function() {
       profiles.emit('middleware', {
         req,
         name: fn.name,
         elapsedMS: Date.now() - start
       });
 
       next.apply(this, arguments);
     });
   };
 }

Source: lunchbadger.com

How to create response time router node js

module.exports = function responseTime(){
  return function(req, res, next){
    var start = new Date;

    if (res._responseTime) return next();
    res._responseTime = true;

    res.on('header', function(){
      var duration = new Date - start;
      res.setHeader('X-Response-Time', duration + 'ms');
    });

    next();
  };
};

Source: senchalabs.org

Similar codes

11 votes308 views3 answers
How to use body-parser in node js
Javascript Node.js
7 votes320 views2 answers
Getting user input in node js
Javascript Node.js
16 votes329 views2 answers
How to create an array in node js
Javascript Node.js
61 votes359 views6 answers
Node sass version 5.0.0 is incompatible with ^4.0.0
Javascript Node.js
0 vote435 views1 answer
App listen in node js
Javascript Node.js
1 vote312 views1 answer
Node redis json push to array
Javascript Node.js
0 vote300 views2 answers
How to return when child process is complete in node js
Javascript Node.js
2 votes318 views1 answer
Node file change event listener
Javascript Node.js
6 votes314 views1 answer
Add numbers from array nodejs
Javascript Node.js
48 votes449 views3 answers
Node sass version 6.0.0 is incompatible with 4.0.0
Javascript Node.js