Gain insights into building scalable backend applications with NestJS. Explore modules, REST API, TypeORM, JWT authentication, and automated testing to advance your backend development skills.

hello-world.tar.gz

nest-first-app

nest-starter

nest-starter-build

nest-starter-start-in-prod

nest-starter-start-module-controller-service

nest-starter-start-generate-resource

database-agnostic

nest-global-module

nest-scope

books-api

books-api-database

books-api-database-configuration

books-api-database-configuration-joi

books-api-database-configuration-default-env

books-api-database-configuration-dev-env

nest-react-hashing

books-api-test-auth-service

books-api-test-end-to-end

nest-react-spa

nest-react-bcrypt

In this course, you will cover NestJS, a framework used to build efficient and reliable server-side applications. Using this framework, developers can make highly scalable backend applications that can be consumed with any type of frontend. 

You will start the course by learning the foundational blocks of NestJS, such as understanding modules, services, and controllers. Next, you will learn how to build REST API, validation and error handling. You will also learn database integration using TypeORM, app configuration using environment variables, authentication, and authorization using JWT tokens. You will complete this course by learning automated testing and application logging.

After completing this course, you will be equipped with all the necessary skills to build scalable backend applications using NestJS, and that will also advance your career in backend development.

Building a Back-End Application with NestJS

To convert passwords into irreversible hash values for security

To synchronize user passwords across different systems

What is the role of hashing in the context of password security?

What is the role of hashing in the context of password security?

By generating a unique hash for each password, even if the passwords are identical

 By encrypting and decrypting user passwords

By storing passwords in a secure central database

By sending user passwords to a secure external server for validation

How does bcrypt enhance the security of passwords?

How does bcrypt enhance the security of passwords?

It encrypts the user password before sending it to the client.

It generates an access token from the given payload.

It verifies the user credentials against the database.

It stores the user session in the server to maintain state.

Consider this code snippet from a sign-in method. What does the `signAsync` method of `JwtService` do?

   ``` typescript
   const payload = { id: user.id, email: user.email };
   const accessToken = await this.jwtService.signAsync(payload);
   ```

Consider this code snippet from a sign-in method. What does the <code>signAsync</code> method of <code>JwtService</code> do?
<pre><code class="language-typescript">const payload = { id: user.id, email: user.email };
const accessToken = await this.jwtService.signAsync(payload);
</code></pre>

Information about the current request and response

Configuration settings of the application

What does the `ExecutionContext` object provide in a guard `canActivate` method?

```typescript
@Injectable()
export class AuthGuard implements CanActivate {
  canActivate(context: ExecutionContext): boolean {
      
  }
}
```

What does the <code>ExecutionContext</code> object provide in a guard <code>canActivate</code> method?
<pre><code class="language-typescript">@Injectable()
export class AuthGuard implements CanActivate {
 canActivate(context: ExecutionContext): boolean {
 
 }
}
</code></pre>

Test your understanding of Authentication in NestJS.

Introduction

Getting Started

NestJS CLI

Building a REST API

Validation and Error Handling

Working with Databases

App Configuration

Authentication

Authorization

Testing

Logging

Wrapping Up

Quiz on Authentication