Next.js Frontend Struggling with SPA Auth Using Laravel Sanctum

Frontend
1

Help! My Next.js app can’t authenticate with Laravel Sanctum

I’m stuck with a tricky auth issue. My Next.js frontend communicates with a Laravel backend using Sanctum, but I’m running into a problem. After logging in, the authentication cookies show up in my browser, yet subsequent requests to fetch user info result in an authentication error. It all works fine in Postman, so I’m puzzled about what could be going wrong.

I’ve reviewed my code and everything seems in place:

async function getCSRFToken() {
  await fetch('http://myapi.com/sanctum/csrf-cookie', {
    method: 'GET',
    credentials: 'include'
  });
}

async function loginUser(email, password) {
  await getCSRFToken();
  const response = await fetch('http://myapi.com/api/login', {
    method: 'POST',
    credentials: 'include',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ email, password })
  });
  return response.json();
}

async function getUserInfo() {
  const response = await fetch('http://myapi.com/api/user', {
    method: 'GET',
    credentials: 'include',
    headers: { 'Content-Type': 'application/json' }
  });
  return response.json();
}

Any suggestions on how to resolve this issue are welcome. Thanks!

2

yo, sounds like a headache! have u double-checked ur api routes? sometimes nextjs can be funky with api calls. also, try using axios instead of fetch - it handles cookies better imo. and make sure ur not accidentally clearing session data somewhere. good luck man, auth can be a real pain!

3

I encountered a similar issue when implementing Sanctum authentication with a Next.js frontend. One crucial aspect to check is your session configuration in Laravel. Ensure that the ‘sanctum’ guard is properly set up in your auth.php config file. Additionally, verify that your session domain in config/session.php matches your frontend domain.

Another potential pitfall is CORS configuration. Double-check your cors.php file to ensure it allows credentials and has the correct allowed origins. Lastly, inspect your network requests in the browser’s developer tools. Look for any discrepancies in how cookies are being sent or received compared to Postman.

If these don’t resolve the issue, consider implementing a custom middleware in Laravel to log authentication attempts and pinpoint where exactly the process is failing.

4

hmm, have u tried checking your cors settings on the laravel side? sometimes that can cause sneaky auth issues. also, are u using httpOnly cookies? those can be tricky with js. maybe try logging the exact error message ur getting? could give more clues. curious to hear what you find out!