_express-js-sending-multiple-http-responses.md

Code Examples for my Blog Post: Node.js – What is the Difference Between response.send(), response.end() and response.write() ?

The full Github repo can be found here: github.com/kevinchisholm/video-code-examples/tree/master/node-express/response-send-end-write-difference

example-1.js

//require the express nodejs module
var express = require('express'),
  //set an instance of exress
  app = express();

//tell express what to do when the / route is requested
app.get('/', function (req, res) {
  var i = 1,
    max = 5;

  //set the appropriate HTTP header
  res.setHeader('Content-Type', 'text/html');

  //send multiple responses to the client
  for (; i <= max; i++) {
    res.send('<h1>This is the response #: ' + i + '</h1>');
  }
});

//wait for a connection
app.listen(5000, function () {
  console.log('The web server is running. Please open http://localhost:5000/ in your browser.');
});

example-2.js

//require the express nodejs module
var express = require('express'),
  //set an instance of exress
  app = express();

//tell express what to do when the / route is requested
app.get('/', function (req, res) {
  var i = 1,
    max = 5;

  //set the appropriate HTTP header
  res.setHeader('Content-Type', 'text/html');

  //send multiple responses to the client
  for (; i <= max; i++) {
    res.write('<h1>This is the response #: ' + i + '</h1>');
  }
});

//wait for a connection
app.listen(5000, function () {
  console.log('The web server is running. Please open http://localhost:5000/ in your browser.');
});

example-3.js

//require the express nodejs module
var express = require('express'),
  //set an instance of exress
  app = express();

//tell express what to do when the / route is requested
app.get('/', function (req, res) {
  var i = 1,
    max = 5;

  //set the appropriate HTTP header
  res.setHeader('Content-Type', 'text/html');

  //send multiple responses to the client
  for (; i <= max; i++) {
    res.write('<h1>This is the response #: ' + i + '</h1>');
  }

  //end the response process
  res.end();
});

//wait for a connection
app.listen(5000, function () {
  console.log('The web server is running. Please open http://localhost:5000/ in your browser.');
});