✨ ghostlexly-auth ✨

The best, tiny, robust, customizable, and easy authentication for Next.js + Express.js stack.

Features

• 🐣 - Easy to use
• 📝 - Login & Logout
• 🔒 - JWT Secured Cookie
• 💅 - Maintain user session and access user session data
• 🤖 - Fetch module with Axios included (with authorization header)
• 💻 - SSR ready
• 🔥 - Battle-tested on 100k/user websites
• 🔑 - Compatible with PassportJS and Auth0
• ✅ - Module written in TypeScript

Installation

Install package

yarn add ghostlexly-auth

---

Add Context provider to your application

We need to wrap our application with the ghostlexly-auth context provider so that we can fetch user data within our application.

Add the context provider inside your _app.tsx file.

Example

// /pages/_app.tsx

import { GhostlexlyAuthProvider } from "ghostlexly-auth";

function MyApp({ Component, pageProps, router }) {
  return (
    <GhostlexlyAuthProvider {...pageProps}>
      <Component {...pageProps} />
    </GhostlexlyAuthProvider>
  );
}

export default MyApp;

You can configure the provider like you wish

<GhostlexlyAuthProvider {...pageProps} userDataUrl="/api/me" cookieExpireInDays="7">
  <Component {...pageProps} />
</GhostlexlyAuthProvider>

GhostLexlyAuthProvider options:

• userDataUrl: The URL path to your API from which we will fetch the user's session data that we can later access using auth.session.
• cookieExpireInDays: Cookie's expiration time in number of days. (31 by default)

---

Login the user

We first need to declare a auth variable with the useAuth hook. Then, we can call signIn() method to login the user.

Important: The signIn() method requires your api endpoint to return access_token in the response. This token will be used later in a Authorization header, while fetching user data.

Example

import { useAuth } from "ghostlexly-auth";

export default function LoginPage() {
  const router = useRouter();
  const auth = useAuth(); // 👈 here

  const onSubmit = async (data) => {
    auth
      .signIn("/api/login", { email: data.email, password: data.password })
      .then((res) => {
        router.push("/member-area/"); // 👈 redirect to this path if the login is successful
      })
      .catch((err) => {
        alert("Invalid user infos !"); // 👈 return an error if the credentials are invalid
      });
  };
}

Example api endpoint response

The api endpoint return a JWT Token that will be used later on Authorization header.

// https://localhost/api/login
{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE2ODkxMTExNDYsImV4cCI6MTY4OTcxNTk0Nn0.-ELIPUuYVfPOL3wXe-yCIU-TsSXUS4DXBuzirfdfTOg"
}

---

The signIn() method returns a promise. It resolves to the user's session data if the login is successful. If the API does not return a 200 response, it will return an error.

You can provide two parameters to the signIn method:

• url: The path of the API to call for the login.
• data: The data to be sent to the API.

---

Logout the user

We first need to declare a auth variable with the useAuth hook. Then, we can call signOut() method to logout the user.

Example

import { useAuth } from "ghostlexly-auth";

export default function LogoutPage() {
  const auth = useAuth();
  auth.signOut({ redirectUrl: "/member-area/login" });
}

The signOut() method remove the user's cookie and redirect to a path.

You can provide one parameter to the signOut() method:

• redirectUrl: The path to redirect the user to.

---

Get user session

The session object in useAuth hook is the easiest way to check if someone is signed in and get his data.

We first need to declare a auth variable with the useAuth hook. Then, we can call session object to access the user session.

Example

import { useAuth } from "ghostlexly-auth";

export default function ExamplePage() {
  const auth = useAuth();

  console.log(auth.session.status); // 👈 user's session status (if the user is logged in or not)
  console.log(auth.session.data); // 👈 access user session data

  return (
    <div>
      {auth.session.status === "authenticated" && <h1>I'm logged in !</h1>}

      {auth.session.status === "unauthenticated" && <h1>I'm not logged in.</h1>}
    </div>
  );
}

auth.session returns an object containing two values: data and status:

• data: This can be two values: Session / null.
  • when the session hasn't been fetched yet, data will be null
  • in case of success, data will be Session.
• status: Enum mapping to two possible session states: "authenticated" | "unauthenticated"

---

Retrieve user's Access Token

Client side:

import { getAccessToken } from "ghostlexly-auth";

export default TestPage() {
    const accessToken = getAccessToken();
    console.log(accessToken);
}

Server side:

import { getAccessToken } from "ghostlexly-auth";

export async function getServerSideProps({ req }) {
  const accessToken = getAccessToken(req);
  console.log(accessToken);
}

---

Call the api with the Authorization header and Axios

This request will automatically include an Authorization header with your access token.

The api() method accepts a req parameter for the SSR.

import { api } from "ghostlexly-auth";

export default TestPage() {
    const onSubmit = () => {
        api().get("https://dummyjson.com/products");

        api().post("/api/register", { email: "test@email.com"});
    }
}

More informations on Axios