Then, we use the formData API to get user input data from the form text fields and send a post request to the backend using axios. At this point, Nest is now aware that the controllers and services in the app exist. The next step is to create middleware to protect the video routes from unauthenticated users.

What is Nest.js & how to learn it?

JSON Web Tokens (JWT) have become the https://wizardsdev.com/en/vacancy/front-end-react-engineer/ standard sessionless method for authenticating APIs. A JWT contains a user ID + expiration period cryptographically encoded to guarantee authenticity. Object-relational mapping libraries like Sequelize drastically reduce the complexity of working with SQL databases. After using many ORMs over the years, I find Sequelize to provide the best blend of power, performance and TypeScript integration.

Folders and files

In our submitForm nestjs developer function, we’ll prevent the form’s default reload, and we’ll get the form submission information using the formData API. To authorize the user to access the video endpoints, we’ll get the user’s token from the browser’s localStorage, and send a .post HTTP request with axios. Next, we’ll create the streamVideo function to send a video as a stream to the client. We’ll query the database to get the video’s details according to id. If the video id is found, we get the initial range value from the request headers.

Getting started with NestJS — a tutorial for beginners.

You can create custom exception filters by implementing the ExceptionFilter interface and using the @Catch() decorator. Controllers handle incoming requests and return responses to the client. Learn everything about the schema-first approach to creating GraphQL APIs with NestJS. Learn everything about the code-first approach to creating GraphQL APIs with NestJS. From N-Tier, Hexagonal, Domain Driven-Design, and so much, you’ll be ready to build world-class NestJS / Node.js systems in no-time! Prepare for an in-depth guided course & walk-through of real-world Advanced Architectural Concepts & Patterns from the Creator Kamil Mysliwiec himself, and Mark Pieszak (Core Team Member).

UseNavigation is used to redirect users after a successful sign-in. In this code, we import createReadStream and statSync from the fs module. We use the createReadStream to read files in our file system, and statSync to get the file’s details. We’ll create a requestBody variable and create objects to hold the form data values. The next step is to create a signin function that will allow users to log in to the application. In this article, we’ll take a deep dive into building the app backend with NestJS, building the app frontend with React, and then deploying the full-stack app.

Services, Middleware, and Exception Filters

Lastly, the main.ts is the entry file of the application which uses the core function NestFactory to create a Nest application instance. Next, the app.module.ts is the root module of the application and app.service.ts is the service/data model logic of the application. Now this interface can be customized to represent the different database schemas and columns that our application will use. The @Controllers, and @Get are the decorators used to inform Nest.js that we are creating a Todos controller and the findAll method is a GET request. The controller receives a specific request for the application through the routing mechanism created and processes the request. Functional Reactive Programming (FRP) is a programming model for reactive programming (Asynchronous Dataflow Programming) using the building blocks of functional programming.

• A JWT contains a user ID + expiration period cryptographically encoded to guarantee authenticity.
• First, we need to configure Multer to permit the uploading and streaming of videos.
• We send the user schema object and the jwtService as parameters for the Signin routes.
• NestJS natively supports the microservice architectural development style right out of the box by providing proper integration to many popular microservice tools such as Kafka, gPRC, RabbitMQ, etc.
• Functional Programming(FP) is also a programming paradigm where programs are constructed by applying and composing functions.
• When building highly testable, well-structured, and maintainable backend applications using TypeScript, NestJS is the top choice for top organizations.

Nest offers many features that allow developers to build web apps using their programming paradigms of choice (functional, object-oriented, or functional reactive). Nest also uses robust Node.js frameworks, like Express (its default) and Fastify, and includes inbuilt support for TypeScript, with the freedom to use pure JavaScript. NestJS is a progressive NodeJS framework for building efficient, reliable, and scalable server-side applications.

Nest applications handle requests and produce responses in a sequence we refer to as the request lifecycle. Next, we’ll loop through the video list in the videos state and display the list to users. We’ll use the link component to create a link to the video stream page, parsing the video in the URL. We check the response status to see if the sign-in was successful.