NodeJs Tutorials
- NodeJs
- Install NodeJs
- Why use NodeJs
- NodeJs Process Model
- create First Application
- Run NodeJs Application
- Node.js Console
- Node.Js Modules
- URL Modules
- node.js Callback
- Node.js Events
- Upload Files
- Upload single & Multiple Files
- NodeJs File System
- NodeJs Email
- Debugging NodeJs
- .ENV
- NodeJs Mysql
- Helpers
- encription and decription in nodeJs
- Query string
- Date & Time
- Express Js
- Template Engine with Express
- MVC Pattern in Node.Js
- list of NPM Module
- Middleware
- Body Parser
- Render
- Nodemon module
- Morgan module
- Flash Message in ExpressJs
- Session
- Session store in database
- Cookies
- Helmet
- Multer
- Router: How To Use Routing In Node.Js
- App.Js
- express.json() and express.urlencoded()
- REST APIs in NodeJs
- Gloabal Objects
- Submit Form Data
- How to get Post Data in Node.js
- How to Get URL Parameters in Node.js
- How to create Node Project
- How to Insert Form Data Into the MySql Table Using Node.js
- How to fetch Data from MySQL database table using Node.js
- CRUD Example
- Await and Async
- Promises
- Login Example
- Password Encription
- How to validate Form (Form Validation) in Node.Js?
- Registration & Login form usingn Node.Js & MySql?
- Forgot & Reset Password
- File Upload in Node.Js with ExpressJs
- Resize Image Before Upload using Multer Sharp
- Upload multiple file using node.js with multer module
- Upload file using node.js with multer module
- Client IP Address
- REST API Downloading File in NodeJs
- Export and Download CSV From MySQL Database
- CRUD REST API
- CRUD REST API Example 2
- Enable HTTPS using Node
- How to send EMAIL using NodeJs?
- Dynamic dependent dropdown using NodeJs?
- Autocomplete Search
- Get and Send Data From Ajax Request
- Get and Post Data using Ajax
- Passport Authentication
- Node Js Data type
- Node Js Error
- Node Js Array Function
- Node Js String Function
- Puppeter Module
What is Helmet in NodeJs?
Helmet is a module of Node.Js that helps in securing HTTP headers. It sets up various HTTP headers to prevent attacks like Cross-Site-Scripting(XSS), clickjacking, etc.
Helmet secure the HTTP Security.
HTTP headers can leak sensitive information about your app. so you must use helmet for http security.
Helmet.js is a collection of 12 Node modules that interface with Express. Each module provides configuration options for securing different HTTP headers.
File Name :
npm install helmet --save
why use Helmet in node.Js?
File Name :
Content-Security-Policy: It sets up the Security Policy.
Expect-CT: It is used for handling Certificate Transparency.
X-DNS-Prefetch-Control: It is used for controlling the fetching of browser DNS.
X-Frame-Options: It is used to prevent ClickJacking.
X-Powered-By: It is used to remove X-Powered-By header. X-Powered-By header leaks the version of the server and its vendor.
Public-Key-Pins: It is used for HTTP public key pinning.
Strict-Transport-Security: It is used for HTTP Strict Transport policy.
X-Download-Options: It restricts to various Download-Options.
Cache control: It is used for disabling Client-Side caching.
X-Content-Type-Options: It is used to prevent the Sniffing attack.
Referrer-Policy: It is used to hide the referrer header.
X-XSS-Protection: It is used to add protection to XSS attacks.
How to show HTTP Header info: (without Helmet)
first right-click on a page that you want to inspect. Now, click on inspect element. After that open the Network tab. and there you will see the list of requests made by the browser.
File Name :
HTTP/1.1 304 Not Modified
X-Powered-By: Express
ETag: W/"35-QqeUaYjSJ35gtyT3DcgtpQlitTU"
Date: Thu, 04 Jun 2020 15:55:00 GMT
Connection: keep-alive
After use Helmet
File Name :
HTTP/1.1 304 Not Modified
X-DNS-Prefetch-Control: off
X-Frame-Options: SAMEORIGIN
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Download-Options: noopen
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
ETag: W/"35-QqeUaYjSJ35gtyT3DcgtpQlitTU"
Date: Thu, 04 Jun 2020 16:11:37 GMT
Connection: keep-alive
Here, the new set of headers are applied by our helmet.js module. These headers are added for an additional level of security.
Example
File Name :
const express = require('express');
const helmet = require('helmet');
const app = express();
app.use(helmet());
app.get('/', (req, res) => {
res.send("This is the Demo page for"
+ " setting up express server !")
});
app.listen(3000, (err) => {
if (err) { console.log(err); }
else { console.log('Server started "
+ "at http://localhost:3000'); }
});
X-XSS-Protection
helmet.xssFilter prevents cross-site scripting. While browsers come with a filter that prevents this by default,
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app.use(helmet.xssFilter());
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import * as helmet from "helmet";
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