[5.6] Except URIs from CheckForMaintenanceMode middleware

[thannaske]

Feature
Like in the VerfiyCsrfToken middleware you should be able to specify URIs that are excluded from the handling of the CheckForMaintenanceMode middleware by adding them to a $except array. URIs that are matching are handled by the application even when maintenance mode is currently active.

Type
I consider this a minor feature.

Background & Use Case
Check the old pull request (#24731) that was designed to extend the artisan down command and the original feature proposal (laravel/ideas#1242) for a deeper description of the use case.

Usage
Same procedure as in the VerifyCsrfToken middleware:

<?php

namespace App\Http\Middleware;

use Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode as Middleware;

class CheckForMaintenanceMode extends Middleware
{
    /**
     * The URIs that should be excluded from CSRF verification.
     *
     * @var array
     */
    protected $except = [
        '/legal',
        '/privacy',
        '/terms',
        '/even/wildcards/are/okay/*
    ];
}

Breaking Changes
None. The middleware keeps its usual behavior unless the $except array gets redefined in a child middleware that extends the CheckForMaintenanceMode middleware.

[m1guelpf]

Tests?

[thannaske]

@m1guelpf The integrated function is the same as in the VerifyCsrfToken middleware, which is tested in tests/Integration/Http/Middleware/VerifyCsrfTokenExceptTest.

Edit
All right, all right. Thumbs down. I'll provide the test to satisfy your silent criticism.

[tetrahedronix]

Will this feature work with package development? I tried to extend CheckForMaintenanceMode class and register it in the Service Provider but it doesn't work. I'm using Laravel Framework 5.6.28.

Edit: OK, using the prependMiddleware method it works fine now.