Next.js Middleware Tutorial

Next.js middleware is a powerful tool that allows developers to protect routes and APIs by adding custom middleware functions.

In this tutorial, we will learn how to use middleware in Next.js to secure our routes and APIs using codemeta.

Step 1: Installing Next.js Middleware

To use middleware in Next.js, we first need to install the necessary dependencies. Open your terminal and run the following command:

npm install next-connect codemeta express

Step 2: Creating Middleware Functions

Next, we need to create our custom middleware functions to protect our routes and APIs. Create a new file named middleware.js and add the following code:


const nextConnect = require('next-connect');
const codemeta = require('codemeta');
const express = require('express');

const middleware = nextConnect();

middleware.use((req, res, next) => {
// Add your middleware logic here
console.log('Middleware executed');
next();
});

module.exports = middleware;


Step 3: Implementing Middleware in Next.js

Now that we have our middleware functions ready, we can implement them in our Next.js application. Open your pages/api folder and add the following code to secure your API route:


import middleware from '../../middleware';

const handler = middleware();

handler.get((req, res) => {
res.status(200).json({ message: 'API protected by middleware'});
});

export default handler;


Step 4: Testing our Middleware

Finally, we can test our middleware by accessing our protected route or API. Open your browser and navigate to http://localhost:3000/api to see the middleware in action.

Congratulations! You have successfully implemented Next.js middleware to protect your routes and APIs using codemeta.