nextjs-basic-auth-middleware

nextjs-basic-auth-middleware

:warning: Please upgrade to v2 if you use Next.js middleware version, v1 is broken. SSR Middleware for Next <=11 is still available on v1.

Adds basic auth support to Next.js projects using the official middleware approach (with a middleware file). Options can be set on the basic auth middleware and overridden using environment variables.

Installation

Run either of the following commands to add the package, based on your package manager of choice:

# NPM
npm install nextjs-basic-auth-middleware

# Yarn
yarn add nextjs-basic-auth-middleware

Usage

Next.js Middleware

The Next.js middleware functionality allows you to add basic auth in front of all your requests, see the Next.js Middleware documentation for more information.

It consists of 2 parts, createNextAuthMiddleware for checking and redirecting and createApiPage to create the API page that sends a 401 message.

You can use the createNextAuthMiddleware function to create a default middleware function that sends a NextResponse.next() when the auth passes:

    // middleware.ts
    import { createNextAuthMiddleware } from 'nextjs-basic-auth-middleware'

    export const middleware = createNextAuthMiddleware(options)

    export const config = {
        matcher: ['/(.*)'], // Replace this with your own matcher logic
    }

Next create the API page that returns the 401 response:

    // pages/api/auth.ts
    import { createApiPage } from 'nextjs-basic-auth-middleware'

    export default createApiPage()

Optional

You can also use the nextBasicAuthMiddleware function to check basic auth in a bigger middleware function:

    import { nextBasicAuthMiddleware } from 'nextjs-basic-auth-middleware'

    export const middleware = (req) => {
        nextBasicAuthMiddleware(options, req)

        // Your other middleware functions here

        return NextResponse.next()
    }

:warning: The middleware will still return a 401 and will quit processing the rest of the middleware. Add this middleware after any required work.

Original SSR approach

Please check 1.0.0 if you want to use this, this is no longer available in version >=2

Setting environment variables

If you want to override credentials you can use the BASIC_AUTH_CREDENTIALS environment variable:

# Enables basic auth for user `test` with password `password`
BASIC_AUTH_CREDENTIALS=user:password

# You can set multiple accounts using `|` as a delimiter
BASIC_AUTH_CREDENTIALS=user:password|user2:password2

API

nextBasicAuthMiddleware()

nextBasicAuthMiddleware(req: NextApiRequest, res: http.ServerResponse, options)

The options object can contain any of the following options:

option	description	default value
pathname	The path that the middleware redirects to	/api/auth
users	A list of users that can authenticate	[]

The user object consists of the following required fields:

field	description	type
name	The username	string
password	The password	string

Local Development

Below is a list of commands you will probably find useful.

npm start or yarn start

Runs the project in development/watch mode. Your project will be rebuilt upon changes. TSDX has a special logger for your convenience. Error messages are pretty printed and formatted for compatibility VS Code's Problems tab.

Your library will be rebuilt if you make edits.

npm run build or yarn build

Bundles the package to the dist folder. The package is optimized and bundled with Rollup into multiple formats (CommonJS, UMD, and ES Module).

npm test or yarn test

Runs the test watcher (Jest) in an interactive mode. By default, runs tests related to files changed since the last commit.

This project was bootstrapped with TSDX.