Laravel中的BinaryFileResponse未定义 [英] BinaryFileResponse in Laravel undefined

问题描述

我遇到了以下问题：
我想在路线上返回一个图像/ getImage / {id}
该函数如下所示：

I have got the following problem: I want to return an Image on the route /getImage/{id} The function looks like this:

public function getImage($id){
   $image = Image::find($id);
   return response()->download('/srv/www/example.com/api/public/images/'.$image->filename);
}

当我这样做时，它会将此返回给我：

When I do this it returns me this:

FatalErrorException in HandleCors.php line 18:
Call to undefined method Symfony\Component\HttpFoundation\BinaryFileResponse::header()

我有使用Response; 在开头控制器。
我不认为HandleCors.php是问题但无论如何：

I have got use Response; at the beginning of the controller. I dont think that the HandleCors.php is the problem but anyway:

<?php namespace App\Http\Middleware;
use Closure;

use Illuminate\Contracts\Routing\Middleware;
use Illuminate\Http\Response;

class CORS implements Middleware {

public function handle($request, Closure $next)
{
      return $next($request)->header('Access-Control-Allow-Origin' , '*')
            ->header('Access-Control-Allow-Methods', 'POST, GET, OPTIONS, PUT, DELETE')
            ->header('Access-Control-Allow-Headers', 'Content-Type, Accept, Authorization, X-Requested-With, Application');
     }
}

我实际上不知道为什么会这样，因为它确实是就像它在Laravel Docs中描述的那样。
当我收到错误时我更新了Laravel但这并没有解决它。

I actually dont know why this happens since it is exactly like it is described in the Laravel Docs. I have updated Laravel when I got the error but this did not fix it.

推荐答案

问题在于你在没有该功能的 Response 对象上调用 - > header（）（ Symfony \Component\HttpFoundation\BinaryFileResponse class）。 - > header（）函数是 Laravel使用的特征的一部分响应类，而不是基本的Symfony响应。

The problem is that you're calling ->header() on a Response object that doesn't have that function (the Symfony\Component\HttpFoundation\BinaryFileResponse class). The ->header() function is part of a trait that is used by Laravel's Response class, not the base Symfony Response.

幸运的是，您可以访问 headers property，所​​以你可以这样做：

Fortunately, you have access to the headers property, so you can do this:

$response = $next($request);

$response->headers->set('Access-Control-Allow-Origin' , '*');
$response->headers->set('Access-Control-Allow-Methods', 'POST, GET, OPTIONS, PUT, DELETE');
$response->headers->set('Access-Control-Allow-Headers', 'Content-Type, Accept, Authorization, X-Requested-With, Application');

return $response;

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