Laravel 5.2 CORS，GET 不适用于预检选项

可怕的 CORS 错误：

跨源请求被阻止：同源策略不允许读取 远程资源位于http://localhost/mysite/api/test http://localhost/mysite/api/test。 （原因：CORS 标头“Access-Control-Allow-Origin”丢失）。

拉拉维尔路线：

$router->group(['prefix' => 'api', 'middleware' => 'cors'], function ($router) {
    $router->get('/test', 'MyController@myMethod');
});

Laravel Cors 中间件：

public function handle($request, Closure $next)
    {
        header('Access-Control-Allow-Origin: *');

        // ALLOW OPTIONS METHOD
        $headers = [
            'Access-Control-Allow-Methods' => 'POST, GET, OPTIONS, PUT, DELETE',
            'Access-Control-Allow-Headers' => 'Content-Type, X-Auth-Token, Origin, Authorization'
        ];
        if ($request->getMethod() == "OPTIONS") {
            // The client-side application can set only headers allowed in Access-Control-Allow-Headers
            return Response::make('OK', 200, $headers);
        }

        $response = $next($request);
        foreach ($headers as $key => $value)
            $response->header($key, $value);
        return $response;
    }

Laravel 内核：

 protected $routeMiddleware = [
        'auth' => \App\Http\Middleware\Authenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
        'cors' => \App\Http\Middleware\CORS::class
    ];

相关.htaccess：

RewriteCond %{HTTP:Authorization} .
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

相关Vue.js：

 new Vue({
        el: '#app',
        data: {
           //data here
        },
        http: {
            headers: {
                "Authorization": "Basic " + "apiKeyHere"
            }
        },
        methods: {
            mymethod: function (e)
            {
                e.preventDefault();
                this.$http.get('http://localhost/mysite/api/test').then(
                        function (response)
                        {
                          //do something
                        }
                )
            }
        }
    });

如果我取出授权标头选项，则请求有效。

我也尝试过https://github.com/barryvdh/laravel-cors https://github.com/barryvdh/laravel-cors但仍然没有喜悦。 任何帮助表示赞赏！

显然这不是理想的解决方案，但它确实有效。我已将其添加到routes.php 文件的顶部：

header('Access-Control-Allow-Origin: *');
header( 'Access-Control-Allow-Headers: Authorization, Content-Type' );

如果不用黑客就能让这个工作就好了……唉。

更新：结果与 IIS 相关。我最终在 web.config 文件中设置了标头，现在 CORS 可以正常工作，而无需破解 paths.php 文件。

<httpProtocol>
    <customHeaders>
       <add name="Access-Control-Allow-Headers" value="Origin, Authorization, X-Requested-With, Content-Type, Accept" />
       <add name="Access-Control-Allow-Methods" value="POST,GET,OPTIONS,PUT,DELETE" />
    </customHeaders>
</httpProtocol>

如果您想限制访问，可以添加出站规则：

      <outboundRules>
          <clear />
                <rule name="AddCrossDomainHeader">
                    <match serverVariable="RESPONSE_Access_Control_Allow_Origin" pattern=".*" />
                    <conditions logicalGrouping="MatchAll" trackAllCaptures="true">
                        <add input="{HTTP_ORIGIN}" pattern="(http(s)?://((.+\.)?somesite\.com|(.+\.)?anothersite\.org))" />
                    </conditions>
                    <action type="Rewrite" value="{C:0}" />
                </rule>
      </outboundRules>