国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Home Web Front-end JS Tutorial Site Authentication in Node.js: User Signup and Login

Site Authentication in Node.js: User Signup and Login

Mar 10, 2025 am 12:20 AM

This tutorial demonstrates building a user registration and login system in a Node.js web application. We'll cover input validation and password hashing for enhanced security.

Application Setup

Begin by creating a project directory (e.g., "site-auth"). Initialize npm within this directory:

npm init -y

Password validation uses a regular expression /^[a-zA-Z0-9]{6,30}$/, enforcing 6-30 characters consisting of alphanumeric characters.

The registration form's data is accessible via result. Validation errors result in an error message and redirection to the registration page. Duplicate email addresses are also prevented. Crucially, passwords are hashed using bcrypt before database storage:

result.value.password = hash

Successful registration displays a success message and redirects to the login page. Start the server with:

node app.js

Access the registration page at https://localhost:5000.

Site Authentication in Node.js: User Signup and Login

Sign-In Implementation

The login functionality is added to /routes/users.js. A login validation schema is defined using Joi:

const loginSchema = Joi.object().keys({
  email: Joi.string().email().required(),
  password: Joi.string().regex(/^[a-zA-Z0-9]{6,30}$/).required()
});

The login route handles both GET (rendering the login page) and POST (processing login attempts) requests:

router.route('/login')
  .get((req, res) => {
    res.render('login')
  })
  .post(async (req, res, next) => {
    // ... (login validation and password comparison logic) ...
  });

Successful login redirects to a dashboard.

Site Authentication in Node.js: User Signup and Login Site Authentication in Node.js: User Signup and Login Site Authentication in Node.js: User Signup and Login

Dashboard Implementation

A simple dashboard route is added to /routes/index.js:

router.get('/users/dashboard', (req, res) => {
    res.render('dashboard')
});

Site Authentication in Node.js: User Signup and Login

Conclusion

This tutorial provides a foundation for secure user authentication in Node.js applications. Remember to always validate user input and securely hash passwords. The complete source code is available on GitHub. This tutorial was updated with contributions from Mary Okosun, a software developer based in Lagos, Nigeria.

The above is the detailed content of Site Authentication in Node.js: User Signup and Login. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

JavaScript vs. Java: Which Language Should You Learn? JavaScript vs. Java: Which Language Should You Learn? Jun 10, 2025 am 12:05 AM

JavaScriptisidealforwebdevelopment,whileJavasuitslarge-scaleapplicationsandAndroiddevelopment.1)JavaScriptexcelsincreatinginteractivewebexperiencesandfull-stackdevelopmentwithNode.js.2)Javaisrobustforenterprisesoftwareandbackendsystems,offeringstrong

Which Comment Symbols to Use in JavaScript: A Clear Explanation Which Comment Symbols to Use in JavaScript: A Clear Explanation Jun 12, 2025 am 10:27 AM

In JavaScript, choosing a single-line comment (//) or a multi-line comment (//) depends on the purpose and project requirements of the comment: 1. Use single-line comments for quick and inline interpretation; 2. Use multi-line comments for detailed documentation; 3. Maintain the consistency of the comment style; 4. Avoid over-annotation; 5. Ensure that the comments are updated synchronously with the code. Choosing the right annotation style can help improve the readability and maintainability of your code.

The Ultimate Guide to JavaScript Comments: Enhance Code Clarity The Ultimate Guide to JavaScript Comments: Enhance Code Clarity Jun 11, 2025 am 12:04 AM

Yes,JavaScriptcommentsarenecessaryandshouldbeusedeffectively.1)Theyguidedevelopersthroughcodelogicandintent,2)arevitalincomplexprojects,and3)shouldenhanceclaritywithoutclutteringthecode.

Java vs. JavaScript: Clearing Up the Confusion Java vs. JavaScript: Clearing Up the Confusion Jun 20, 2025 am 12:27 AM

Java and JavaScript are different programming languages, each suitable for different application scenarios. Java is used for large enterprise and mobile application development, while JavaScript is mainly used for web page development.

Javascript Comments: short explanation Javascript Comments: short explanation Jun 19, 2025 am 12:40 AM

JavaScriptcommentsareessentialformaintaining,reading,andguidingcodeexecution.1)Single-linecommentsareusedforquickexplanations.2)Multi-linecommentsexplaincomplexlogicorprovidedetaileddocumentation.3)Inlinecommentsclarifyspecificpartsofcode.Bestpractic

Mastering JavaScript Comments: A Comprehensive Guide Mastering JavaScript Comments: A Comprehensive Guide Jun 14, 2025 am 12:11 AM

CommentsarecrucialinJavaScriptformaintainingclarityandfosteringcollaboration.1)Theyhelpindebugging,onboarding,andunderstandingcodeevolution.2)Usesingle-linecommentsforquickexplanationsandmulti-linecommentsfordetaileddescriptions.3)Bestpracticesinclud

JavaScript Data Types: A Deep Dive JavaScript Data Types: A Deep Dive Jun 13, 2025 am 12:10 AM

JavaScripthasseveralprimitivedatatypes:Number,String,Boolean,Undefined,Null,Symbol,andBigInt,andnon-primitivetypeslikeObjectandArray.Understandingtheseiscrucialforwritingefficient,bug-freecode:1)Numberusesa64-bitformat,leadingtofloating-pointissuesli

JavaScript vs. Java: A Comprehensive Comparison for Developers JavaScript vs. Java: A Comprehensive Comparison for Developers Jun 20, 2025 am 12:21 AM

JavaScriptispreferredforwebdevelopment,whileJavaisbetterforlarge-scalebackendsystemsandAndroidapps.1)JavaScriptexcelsincreatinginteractivewebexperienceswithitsdynamicnatureandDOMmanipulation.2)Javaoffersstrongtypingandobject-orientedfeatures,idealfor

See all articles