laravel之跨域请求（二）

1，方法一：通过扩展包解决

扩展包地址:barryvdh/laravel-cors

（1）安装，项目根目录

composer require barryvdh/laravel-cors

Laravel 5.4 及以下版本需要手动在 config/app.php 中注册服务提供者：

Barryvdh\Cors\ServiceProvider::class,

（2）使用
全局使用的中间件，在app/Http/kernel.php 文件：

protected $middleware = [
    // ...
    \Barryvdh\Cors\HandleCors::class,
];

特定路由中应用 CORS

protected $middlewareGroups = [
    'web' => [
       // ...
    ],

    'api' => [
        // ...
        \Barryvdh\Cors\HandleCors::class,
    ],

（3）配置
自定义配置，laravel-cors 扩展包的配置文件发布到 config 目录下：

php artisan vendor:publish --provider="Barryvdh\Cors\ServiceProvider" 

以下是该配置文件默认配置值（config/cors.php）：

eturn [

    /*
    |--------------------------------------------------------------------------
    | Laravel CORS
    |--------------------------------------------------------------------------
    |
    | allowedOrigins, allowedHeaders and allowedMethods can be set to array('*')
    | to accept any value.
    |
    */

    'supportsCredentials' => false,
    'allowedOrigins' => ['*'],
    'allowedOriginsPatterns' => [],
    'allowedHeaders' => ['*'],
    'allowedMethods' => ['*'],
    'exposedHeaders' => [],
    'maxAge' => 0,

];

以上步骤操作完，发起请求会报403错误，具体没找原因，知道小伙伴，可留言。


在gitHub上面找到了问题：

我使用的是 laravel 5.7 api + dingo + laravel-cors not work，需要在 config/app.php 中操注册服务提供者：

'providers' => [
	Barryvdh\Cors\ServiceProvider::class	
]

所以上面提到的laravel5.4<=版本需要添加，这个需要根据具体情况而定。

2，方法二：通过自定义中间件解决

1，新建一个中间件

php artisan make:middleware EnableCrossRequestMiddleware

2.CrossRequestMiddleware.php

?php
namespace App\Http\Middleware;
use Closure;
class CrossRequestMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Closure $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $response = $next($request);
        $origin = $request->server('HTTP_ORIGIN') ? $request->server('HTTP_ORIGIN') : '';
        $allow_origin = [
            'http://localhost:8000',
        ];
        if (in_array($origin, $allow_origin)) {
            $response->header('Access-Control-Allow-Origin', $origin);
            $response->header('Access-Control-Allow-Headers', 'Origin, Content-Type, Cookie, X-CSRF-TOKEN, Accept, Authorization, X-XSRF-TOKEN');
            $response->header('Access-Control-Expose-Headers', 'Authorization, authenticated');
            $response->header('Access-Control-Allow-Methods', 'GET, POST, PATCH, PUT, OPTIONS，DELETE');
            $response->header('Access-Control-Allow-Credentials', 'true');
        }
        return $response;
    }
}

3,全局使用，注册该中间件

 protected $middleware = [
        // more
        App\Http\Middleware\CrossRequestMiddleware::class,
    ];