/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

0 vote132 views1 answer
How to load image from dir nodejs
Javascript Node.js
0 vote134 views1 answer
Concept of node js with react js
Javascript Node.js
21 votes148 views1 answer
Node if path exists
Javascript Node.js
24 votes123 views3 answers
Node js check type of variable
Javascript Node.js
29 votes134 views3 answers
Node js version
Javascript Node.js
-1 vote122 views1 answer
Split and join in node js
Javascript Node.js
7 votes136 views3 answers
Atob nodejs
Javascript Node.js
0 vote141 views1 answer
Nodejs write to log file
Javascript Node.js
0 vote119 views1 answer
Send mail in node js without password
Javascript Node.js
13 votes140 views4 answers
Node version manager install
Javascript Node.js