01：如何将资源文件夹放在pulic外

如css放在 /statics/assets/cms/css/main.css

<link href="http://www.abc.app/assets/cms/css/app.min.css" rel="stylesheet">

解决过程:
app.min.css这个文件的请求也是经过public/index.php，看下$_SERVER中有关路径的内容如下

[server] => Symfony\Component\HttpFoundation\ServerBag Object(
     [parameters:protected] => Array(
          [HTTP_HOST] => www.abc.app
          [SERVER_NAME] => abc.app
          [DOCUMENT_ROOT] => /home/vagrant/abcde/study/abc/public
          [DOCUMENT_URI] => /index.php
          [REQUEST_URI] => /assets/cms/css/app.min.css
          [SCRIPT_NAME] => /index.php
          [SCRIPT_FILENAME] => /home/vagrant/abcde/study/abc/public/index.php
          ...
          )
     ...
)

有两个解决办法，一个是在.htaccess中定义规则，另一个就是在全局中间件中生成响应对象直接返回
下面是第二种解决办法，定义中间件

第一步:定义全局中间件

class StaticPath{
    protected $container;
    protected $response;
    // 根据扩展名定义内容类型，完整参考 \Symfony\Component\HttpFoundation\File\MimeType\MimeTypeExtensionGuesser::$defaultExtensions
    protected $mimes = [
        'css'     => 'text/css',   
        'html'    => 'text/html',
        'jpeg'    => 'image/jpeg',
        'jpg'     => 'image/jpeg',
        'js'      => 'application/x-javascript',      

    ];

    public function __construct(Container $container, ResponseFactory $response){
        $this->container = $container;
        $this->response = $response;
    }


    public function handle($request, Closure $next){
          $staticPath = base_path('statics'); //获取static的目录
          $file = staticPath . DIRECTORY_SEPARATOR . $request->path(); //请求文件的实际路径, /home/vagrant/abcde/study/abc/statics/assets/install/css/app.min.css    
          if (file_exists($file) && !Str::endsWith('/', $request->path())) { //如果文件存在，就直接返回象            
            //指定headers
            $headers = [];
            $extension = pathinfo($file, PATHINFO_EXTENSION); //文件扩展名
            if (isset($this->mimes[$extension])) {
                $headers['Content-Type'] = $this->mimes[$extension];
            } else {
                $headers['Content-Type'] = 'application/octet-stream';
            }
            //返回请求对象
            return $this->response->make(file_get_contents($file), 200, $headers);
        } else {
            return $next($request);
        }
    }
}

第二步:配置中间件

方法一：直接在App/Http/Kernel中配置

protected $middleware = [
    ...\Middleware\StaticPath::class,
    \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
    \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
    \App\Http\Middleware\TrimStrings::class,
    \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
    \App\Http\Middleware\TrustProxies::class,
];

方法二：在任一服务提供商中
在AppHttpKernel中的$middleware最前面增加中间件StaticPath

$this->app->make(KernelContract::class)->prependMiddleware(StaticPath::class);