Laravel 源码解读：PHP artisan down

use Illuminate\Foundation\Http\Exceptions\MaintenanceModeException;

if ($e instanceof MaintenanceModeException) {
            return response()->json([
                'code'    => '1000',
                'status'  => 'error',
                'message' => $e->getMessage(),
            ], 400);
}Copy

// api 请求结果：
{
    "message": "Service Unavailable",
    // 看这里是 HttpException
    "exception": "Symfony\\Component\\HttpKernel\\Exception\\HttpException",
    "file": "/var/www/learn-laravel/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php",
    "line": 79,
    "trace": [
        {
            "file": "/var/www/learn-laravel/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php",
            "line": 167,
            "function": "handle",
            "class": "Illuminate\\Foundation\\Http\\Middleware\\PreventRequestsDuringMaintenance",
            "type": "->"
        },
       .
       .
    ]
}Copy

<?php

namespace App\Http\Middleware;

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

class PreventRequestsDuringMaintenance extends Middleware
{
    public function handle($request, \Closure $next)
    {
        // $uri = $request->path();

        if($this->app->isDownForMaintenance() && $request->is('api/*')){
          return response()->json([
            'code' => '4444',
            'message' => '服务器维护中...',
            'data' => [],
          ]);
        }

        return parent::handle($request, $next);
    }
}Copy

// api 请求结果：
{
    "code": "4444",
    "message": "服务器维护中...",
    "data": []
}Copy