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)

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

How to work with dates and times in js? How to work with dates and times in js? Jul 01, 2025 am 01:27 AM

The following points should be noted when processing dates and time in JavaScript: 1. There are many ways to create Date objects. It is recommended to use ISO format strings to ensure compatibility; 2. Get and set time information can be obtained and set methods, and note that the month starts from 0; 3. Manually formatting dates requires strings, and third-party libraries can also be used; 4. It is recommended to use libraries that support time zones, such as Luxon. Mastering these key points can effectively avoid common mistakes.

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

Why should you place  tags at the bottom of the ? Why should you place tags at the bottom of the ? Jul 02, 2025 am 01:22 AM

PlacingtagsatthebottomofablogpostorwebpageservespracticalpurposesforSEO,userexperience,anddesign.1.IthelpswithSEObyallowingsearchenginestoaccesskeyword-relevanttagswithoutclutteringthemaincontent.2.Itimprovesuserexperiencebykeepingthefocusonthearticl

JavaScript: Exploring Data Types for Efficient Coding JavaScript: Exploring Data Types for Efficient Coding Jun 20, 2025 am 12:46 AM

JavaScripthassevenfundamentaldatatypes:number,string,boolean,undefined,null,object,andsymbol.1)Numbersuseadouble-precisionformat,usefulforwidevaluerangesbutbecautiouswithfloating-pointarithmetic.2)Stringsareimmutable,useefficientconcatenationmethodsf

What is event bubbling and capturing in the DOM? What is event bubbling and capturing in the DOM? Jul 02, 2025 am 01:19 AM

Event capture and bubble are two stages of event propagation in DOM. Capture is from the top layer to the target element, and bubble is from the target element to the top layer. 1. Event capture is implemented by setting the useCapture parameter of addEventListener to true; 2. Event bubble is the default behavior, useCapture is set to false or omitted; 3. Event propagation can be used to prevent event propagation; 4. Event bubbling supports event delegation to improve dynamic content processing efficiency; 5. Capture can be used to intercept events in advance, such as logging or error processing. Understanding these two phases helps to accurately control the timing and how JavaScript responds to user operations.

What's the Difference Between Java and JavaScript? What's the Difference Between Java and JavaScript? Jun 17, 2025 am 09:17 AM

Java and JavaScript are different programming languages. 1.Java is a statically typed and compiled language, suitable for enterprise applications and large systems. 2. JavaScript is a dynamic type and interpreted language, mainly used for web interaction and front-end development.

See all articles