weddingsite/pages/profile-ssr.js

import PropTypes from 'prop-types';
import Layout from '../components/Layout';
import withSession from '../lib/session';

const SsrProfile = ({ user }) => (
  <Layout>
    <h1>Your GitHub profile</h1>
    <h2>
      This page uses{' '}
      <a href="https://nextjs.org/docs/basic-features/pages#server-side-rendering">
        Server-side Rendering (SSR)
      </a>{' '}
      and{' '}
      <a href="https://nextjs.org/docs/basic-features/data-fetching#getserversideprops-server-side-rendering">
        getServerSideProps
      </a>
    </h2>

    {user?.isLoggedIn && (
      <>
        <p style={{ fontStyle: 'italic' }}>
          Public data, from{' '}
          <a href={githubUrl(user.login)}>{githubUrl(user.login)}</a>, reduced
          to `login` and `avatar_url`.
        </p>
        <pre>{JSON.stringify(user, null, 2)}</pre>
      </>
    )}
  </Layout>
);

export const getServerSideProps = withSession(async ({ req, res }) => {
  const user = req.session.get('user');

  if (!user) {
    return {
      redirect: {
        destination: '/login',
        permanent: false,
      },
    };
  }

  return {
    props: { user: req.session.get('user') },
  };
});

export default SsrProfile;

function githubUrl(login) {
  return `https://api.github.com/users/${login}`;
}

SsrProfile.propTypes = {
  user: PropTypes.shape({
    isLoggedIn: PropTypes.bool,
    login: PropTypes.string,
    avatarUrl: PropTypes.string,
  }),
};