Middleware

Using Middleware in FeathersJS:

Middleware is a powerful feature in FeathersJS that allows you to add extra functionality to your application. It provides a way to manipulate and modify requests and responses as they pass through your application. In FeathersJS, middleware is typically used to perform tasks such as authentication, authorization, data validation, and error handling.

Creating and Using Custom FeathersJS Plugins:

FeathersJS provides a rich plugin architecture that makes it easy to extend its functionality. You can create custom plugins to add new features or to customize existing ones. For example, you might create a plugin to add support for a new database, or to implement custom authentication strategies.

Deployment and Scaling of FeathersJS Applications:

FeathersJS is designed to be scalable and performant, making it well-suited for building high-traffic applications. In this section, we will cover the various options for deploying and scaling FeathersJS applications, including cloud deployment, load balancing, and database scaling.

• We can add a custom EXPRESS Routes and APIs, this can be added in the middleware section.

• the example below is given as starter, where you can add  the existent authentication as the headers, than following the below you can add your routes.

Adding Custom Middleware (Reply Hello World):

module.exports = function (app) {

  app.get('/data', (req, res) => {

    res.json({ message: 'Hello World' });

  });

};

Adding Custom Middleware (Reply Hello World with Authentication):

const  restAuth  = require('@feathersjs/express');

module.exports = function (app) {

  // Add your custom middleware here. Remember that

  // in Express, the order matters.

  app.get('/data',restAuth.authenticate('jwt'), (req, res) => {

    res.json({ message: 'Hello World' });

  });

};

Aditional Methods of adding middleware (socket.io)

const { authenticate } = require('@feathersjs/authentication').express;

// middleware function to check if the user is authenticated

const checkAuthentication = async (req, res, next) => {

  try {

    await authenticate('jwt')(req, res, next);

  } catch (error) {

    return res.status(401).json({ message: 'Not authenticated' });

  }

};

// Folowed by custom routes

// Using middleware in the FeathersJS app

app.use('/api/protected-route', checkAuthentication, (req, res) => {

  res.json({ message: 'Protected route accessed' });

});