Laravel 解决添加CROS中间件后出现Storage私有文件无法访问与下载

问题描述

添加了跨域中间件后，发现文件预览出现了报错，报错信息如下：

Symfony\Component\Debug\Exception\FatalThrowableError
Call to undefined method Symfony\Component\HttpFoundation\BinaryFileResponse::header()

问题原因

排查后发现中间件设置了请求头后会出现这个问题，这是因为Laravel响应请求的实现的类不一样，需要在中间件调用对应的方法设置请求头。

解决方法

引用对应的类

use Illuminate\Http\Response as IlluminateResponse;
use Symfony\Component\HttpFoundation\Response as SymfonyResponse;

根据类调用不同的返回头设置方法

if ($response instanceof IlluminateResponse) {
    $response->header($k, $v);
}
if ($response instanceof SymfonyResponse) {
    $response->headers->set($k, $v);
}

下面是我的跨域中间件，可以参考参考。

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Response as IlluminateResponse;
use Symfony\Component\HttpFoundation\Response as SymfonyResponse;

/**
 * 跨域
 *
 * @author Wenhsing <wenhsing@qq.com>
 */
class CORSMiddleware
{
    // 请求头
    protected $headers = [
        'Access-Control-Allow-Credentials' => 'true',
        'Access-Control-Max-Age'           => 1800,
        'Access-Control-Allow-Methods'     => 'GET, POST, PATCH, PUT, DELETE, OPTIONS',
    ];

    /**
     * Handle an incoming request.
     *
     * @author Wenhsing <wenhsing@qq.com>
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $response = $next($request);
        if (! isset($this->headers['Access-Control-Allow-Origin'])) {
            $this->setAllowHeaders();
            $origin = $request->header('Origin') ?: '';
            $domain = config()->get('cors.domain');
            if ($origin && ('' === $domain || strpos($origin, $domain))) {
                $this->headers['Access-Control-Allow-Origin'] = $origin;
            } else {
                $this->headers['Access-Control-Allow-Origin'] = '*';
            }
            foreach ($this->headers as $k => $v) {
                if ($response instanceof IlluminateResponse) {
                    $response->header($k, $v);
                }
                if ($response instanceof SymfonyResponse) {
                    $response->headers->set($k, $v);
                }
            }
        }
        return $response;
    }

    /**
     * 设置请求头部允许字段
     *
     * @author Wenhsing <wenhsing@qq.com>
     * @return void
     */
    public function setAllowHeaders()
    {
        $headerArr = [
            'Authorization',
            'Content-Type',
            'If-Match',
            'If-Modified-Since',
            'If-None-Match',
            'If-Unmodified-Since',
            'X-CSRF-TOKEN',
            'X-Requested-With',
            'lang',
            'token',
            'X-Token',
        ];
        $headers = implode(', ', $headerArr);
        $this->headers['Access-Control-Allow-Headers'] = $headers;
    }
}