Redirect issue

Certainly! Here’s how you might respond to the Laracasts forum question:

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Solution:

It sounds like your Microsoft SSO route (/login/ms) is returning an HTML redirect page (a 200 OK with a meta refresh or JavaScript), rather than a 302 HTTP redirect. Since a similar Laravel 11 app works fine, and the issue started recently, here are some possible causes and solutions:

1. Double-check the Middleware

Older Laravel apps (e.g. Laravel 8, 9, or sometimes 10) might not have the web middleware globally applied or could have a misconfigured middleware group. Make sure your /login/ms route is using the web middleware (not just api), as session and redirect helpers depend on it.

Example:

Route::get('/login/ms', [SsoController::class, 'redirectToProvider'])->middleware('web');

Or, ensure it's within the correct group in routes/web.php.

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2. Look for expectsJson() on Your Requests

If you're hitting the route with a request that Laravel interprets as expecting JSON (e.g. an AJAX request), Laravel's redirect logic changes, and it may return a JSON "redirect" response or an HTML page with JS.

Make sure your request does not include Accept: application/json headers (check your frontend or tool hitting the URL). It should prefer text/html for typical browser redirects.

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3. Check for Changes in Your SSO or HTTP Client

If you recently upgraded the SSO library (like laravel/socialite), check if the method of handling redirects changed. Sometimes, upgrades alter response behaviors.

If you're using Socialite, make sure you use the redirect() method from the Socialite driver, not ->stateless()->redirect(), unless you need stateless logic.

Example:

public function redirectToProvider()
{
    return Socialite::driver('microsoft')->redirect();
}

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4. Server-level or Proxy Issues

Reverse proxies (like Nginx or Apache with mod_proxy) or load balancers can sometimes convert 302s to 200s with HTML/JS redirect pages, especially if misconfigured.

Test your route directly (using curl or Postman) against the appropriate port on your web server to verify the raw response. For example:

curl -I http://your-server/login/ms

You should get:

HTTP/1.1 302 Found
Location: https://login.microsoftonline.com/...

If you see a 200 response with an HTML page, it's probably happening within Laravel, not at the proxy.

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5. Compare with Laravel 11 Working App

Check the code and middleware stack (use php artisan route:list --middleware) in your working Laravel 11 app and compare with the problematic one for differences in groupings and middleware order.

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Debugging Steps

1. Check which file your route is defined in (make sure it’s in web.php).

2. Place a dd(request()->headers->all()) in your controller to check headers.

3. Comment out SSO logic temporarily and try a manual redirect in the route/controller to isolate SSO issues:

   return redirect('https://example.com');
   

   If this still gives you a 200 with an HTML page, it’s almost certainly middleware or headers.

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Summary

• Ensure web middleware is applied
• Check your request's headers for Accept: application/json
• Test a manual redirect() response
• Inspect server/proxy configuration
• Compare working Laravel 11 app routes/middleware

Let us know which Laravel version you’re using, and feel free to include relevant route/controller code for more specific help!