Authentication and Authorization

Oct 13, 2025 by vinooalluri.com 28 views

Introduction

In this article, we will explore the world of Sever.js, a popular JavaScript framework for building fast, scalable, and maintainable web applications. We will delve into the basics of Sever.js, its features, and how to use it to create a RESTful API with Node.js and MySQL.

What is Sever.js?

Sever.js is a lightweight and flexible framework for building web applications. It provides a robust set of features, including routing, middleware, and a built-in development server. Sever.js is ideal for building small to medium-sized web applications, and it is particularly well-suited for building RESTful APIs.

Setting up a Sever.js Project

To get started with Sever.js, you will need to install the following dependencies:

express: a popular Node.js framework for building web applications
body-parser: a middleware for parsing JSON and URL-encoded data
cors: a middleware for enabling Cross-Origin Resource Sharing (CORS)
mysql: a Node.js driver for interacting with MySQL databases

You can install these dependencies using npm or yarn:

npm install express body-parser cors mysql

Creating a Sever.js Application

To create a Sever.js application, you will need to create a new file called server.js. In this file, you will need to require the necessary dependencies and create a new instance of the Sever.js application:

const express = require("express");
const bodyParser = require("body-parser");
const cors = require("cors");
const mysql = require("mysql");
const app = express();
const PORT = 5000;

app.use(cors());
app.use(express.json());

const connection = mysql.createConnection({
    host: 'db4free.net',
    user: 'estudiantesweb',
    password:'admin12345',
    database: 'cursoweb',
    port:3306
});

connection.connect(err =>{
    if (err) console.log(err);
    console.log("conectado a mysql")
});

Defining Routes

In Sever.js, routes are defined using the app.get(), app.post(), app.put(), and app.delete() methods. These methods take a path and a callback function as arguments. The callback function is executed when the specified path is accessed.

Here is an example of how to define a route for retrieving all calificaciones:

app.get("/calificaciones", (req,res) =>{
    connection.query('SELECT * FROM rojo', (req,result)=>{
        res.send(result)
    })

})

Defining Routes for Creating, Updating, and Deleting Calificaciones

Here is an example of how to define routes for creating, updating, and deleting calificaciones:

app.put("/update/:id",(req,res) => {
    const {id} = req.params
    const {asignatura,nota} = req.body;
    connection.query('UPDATE rojo SET asignatura=?,nota=? WHERE id = ?', 
        [asignatura,nota,id], (err,result) => {
        if (err){
            console.log({err: result})
        }
        res.json({message:` calificaion actualizada ${id}`})
    })
})

app.post("/calificacion", (req, res) => {
    const {asignatura,nota} = req.body;
    connection.query('INSERT INTO rojo (asignatura,nota) VALUES (?,?)',
    [asignatura,nota],(err,result) =>{
        
    });
    res.status(201).json({ mensaje: "calificacion agregada"});
});

app.delete('/delete-calificacion/:id', (req, res) => {
    const { id } = req.params;
    connection.query('DELETE FROM rojo WHERE id=?', 
    [ id], (err) => {
        if (err) throw err;
        res.json({message: 'calificacion eliminada'});
    });
})

Starting the Sever.js Application

To start the Sever.js application, you will need to use the app.listen() method. This method takes a port number and a callback function as arguments. The callback function is executed when the server is started:

app.listen(PORT, () => {
    console.log(`Servidor corriendo en http://localhost:${PORT}`);
})

Conclusion

In this article, we have explored the basics of Sever.js, a popular JavaScript framework for building fast, scalable, and maintainable web applications. We have also seen how to use Sever.js to create a RESTful API with Node.js and MySQL. With Sever.js, you can build robust and scalable web applications that meet the needs of your users.

Future Development

In the future, we plan to explore more advanced topics in Sever.js, including:

Authentication and Authorization: We will explore how to implement authentication and authorization in Sever.js using popular libraries such as Passport.js.
Database Integration: We will explore how to integrate Sever.js with popular databases such as MongoDB and PostgreSQL.
API Documentation: We will explore how to document Sever.js APIs using popular tools such as Swagger and API Blueprint.

References

License

Introduction

In this article, we will answer some of the most frequently asked questions about Sever.js, a popular JavaScript framework for building fast, scalable, and maintainable web applications. Whether you are a beginner or an experienced developer, this article will provide you with the information you need to get started with Sever.js.

Q: What is Sever.js?

A: Sever.js is a lightweight and flexible framework for building web applications. It provides a robust set of features, including routing, middleware, and a built-in development server.

Q: What are the benefits of using Sever.js?

A: Some of the benefits of using Sever.js include:

Fast and scalable: Sever.js is designed to handle high traffic and large datasets, making it an ideal choice for building scalable web applications.
Flexible and customizable: Sever.js provides a robust set of features that can be easily customized to meet the needs of your application.
Easy to learn: Sever.js has a simple and intuitive API that makes it easy to learn and use.

Q: What are the system requirements for running Sever.js?

A: The system requirements for running Sever.js are:

Node.js: Sever.js requires Node.js to run. You can download the latest version of Node.js from the official Node.js website.
npm: Sever.js requires npm to install dependencies. You can download the latest version of npm from the official npm website.
MySQL: Sever.js requires a MySQL database to store data. You can download the latest version of MySQL from the official MySQL website.

Q: How do I install Sever.js?

A: To install Sever.js, you can use the following command:

npm install severjs

Q: How do I create a new Sever.js project?

A: To create a new Sever.js project, you can use the following command:

severjs new myproject

This will create a new Sever.js project called myproject in the current directory.

Q: How do I start a Sever.js server?

A: To start a Sever.js server, you can use the following command:

severjs start

This will start a Sever.js server on port 5000.

Q: How do I stop a Sever.js server?

A: To stop a Sever.js server, you can use the following command:

severjs stop

This will stop the Sever.js server.

Q: How do I update a Sever.js project?

A: To update a Sever.js project, you can use the following command:

severjs update

This will update the Sever.js project to the latest version.

Q: How do I delete a Sever.js project?

A: To delete a Sever.js project, you can use the following command:

severjs delete

This will delete the Sever.js project.

Q: What are some common Sever.js errors?

A: Some common Sever.js errors include:

Error: Cannot find module: This error occurs when Sever.js cannot find a module.
Error: Cannot connect to database: This error occurs when Sever.js cannot connect to the database.
Error: Invalid route: This error occurs when Sever.js encounters an invalid route.

Q: How do I troubleshoot Sever.js errors?

A: To troubleshoot Sever.js errors, you can use the following steps:

Check the Sever.js logs: Sever.js logs can provide valuable information about errors.
Check the Sever.js configuration: Sever.js configuration can affect the behavior of the application.
Check the Sever.js code: Sever.js code can contain errors that need to be fixed.

Conclusion

In this article, we have answered some of the most frequently asked questions about Sever.js, a popular JavaScript framework for building fast, scalable, and maintainable web applications. Whether you are a beginner or an experienced developer, this article will provide you with the information you need to get started with Sever.js.

Future Development

In the future, we plan to explore more advanced topics in Sever.js, including:

Authentication and Authorization: We will explore how to implement authentication and authorization in Sever.js using popular libraries such as Passport.js.
Database Integration: We will explore how to integrate Sever.js with popular databases such as MongoDB and PostgreSQL.
API Documentation: We will explore how to document Sever.js APIs using popular tools such as Swagger and API Blueprint.

References

License

This article is licensed under the MIT License.