Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
res.app Property in Express.js
The res.app property holds a reference to the instance of an Express Application that is being used by the middleware.
Syntax
res.app
Example 1
Create a file with the name "resApp.js" and copy the following code snippet. After creating the file, use the command "node resApp.js" to run this code as shown in the example below −
// res.app code Demo Example
// Importing the express module
var express = require('express');
// Initializing the express and port number
var app = express();
var PORT = 3000;
// Creating an endpoint
app.get('/', function (req, res) {
console.log(res.app.get('views'));
res.end();
});
app.listen(PORT, function(err){
if (err) console.log(err);
console.log("Server listening on PORT", PORT);
});Hit the following URL endpoint for a GET request − http://localhost:3000/
Output
C:\home
ode>> node resApp.js Server listening on PORT 3000 /home/express/test/views
Example 2
Let's take a look at one more example.
// req.range() code Demo Example
// Importing the express module
var express = require('express');
// Initializing the express and port number
var app = express();
var PORT = 3000;
// Creating an endpoint
app.get('/', function (req, res) {
console.log(req.range());
res.end();
});
app.listen(PORT, function(err){
if (err) console.log(err);
console.log("Server listening on PORT", PORT);
});Hit the following URL endpoint for a GET request − http://localhost:3000/
Output
C:\home
ode>> node resApp.js settings: { 'x-powered-by': true, etag: 'weak', 'etag fn': [Function: generateETag], env: 'development', 'query parser': 'extended', 'query parser fn': [Function: parseExtendedQueryString], 'subdomain offset': 2, 'trust proxy': false, 'trust proxy fn': [Function: trustNone], view: [Function: View], views: '/home/express/test/views', 'jsonp callback name': 'callback' }, locals: [Object: null prototype] { settings: { 'x-powered-by': true, etag: 'weak', 'etag fn': [Function: generateETag], env: 'development', 'query parser': 'extended', 'query parser fn': [Function: parseExtendedQueryString], 'subdomain offset': 2, 'trust proxy': false, 'trust proxy fn': [Function: trustNone], view: [Function: View], views: '/home/mayankaggarwal/mysql-test/views', 'jsonp callback name': 'callback' } }, mountpath: '/', _router: { [Function: router] params: {}, _params: [], caseSensitive: false, mergeParams: undefined, strict: false, stack: [ [Layer], [Layer], [Layer] ] } }
Updated on: 29-Jan-2022
179 Views
Advertisements