blessing-skin-server/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use Blade;
use Event;
use Utils;
use App\Events;
use App\Models\User;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        // Replace HTTP_HOST with site url setted in options to prevent CDN source problems
        if (! option('auto_detect_asset_url')) {
            $rootUrl = option('site_url');

            if ($this->app['url']->isValidUrl($rootUrl)) {
                $this->app['url']->forceRootUrl($rootUrl);
            }
        }

        if (option('force_ssl') || Utils::isRequestSecure()) {
            $this->app['url']->forceScheme('https');
        }

        Event::listen(Events\RenderingHeader::class, function($event) {
            // Provide some application information for javascript
            $blessing = array_merge(array_except(config('app'), ['key', 'providers', 'aliases', 'cipher', 'log', 'url']), [
                'base_url' => url('/'),
                'site_name' => option_localized('site_name')
            ]);

            $event->addContent('<script>var blessing = '.json_encode($blessing).';</script>');
        });
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        // Register default cipher
        $className = "App\Services\Cipher\\".config('secure.cipher');

        if (class_exists($className)) {
            $this->app->singleton('cipher', $className);
        } else {
            die_with_utf8_encoding(sprintf(
                '[Error] Unsupported encryption method: < %1$s >, please check your .env configuration <br>'.
                '[错误] 不支持的密码加密方式 < %1$s >，请检查你的 .env 配置文件'
            , config('secure.cipher')));
        }

        $this->app->singleton('users', \App\Services\Repositories\UserRepository::class);
        $this->app->singleton('parsedown', \Parsedown::class);

        Blade::if('admin', function (User $user) {
            return $user->isAdmin();
        });
    }
}