this.http.get(url)

但是当我添加标题：

var headers = new Headers({'x-id': '1'});
this.http.get(url,{'headers': headers})

浏览器返回错误：

XMLHttpRequest cannot load http://domain/api/v1/. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access.

我也尝试添加Origin头 – 浏览器错误：拒绝设置不安全标题“Origin”

和Access-Control-Allow-Origin标题 – 没有影响

在服务器(Laravel)上我创建了中间件Cors.PHP：

<?PHP

namespace App\Http\Middleware;

use Closure;

class Cors {
    public function handle($request,Closure $next)
    {
        return $next($request)
            ->header('Access-Control-Allow-Origin','http://localhost:3000')
            ->header('Access-Control-Allow-Methods','GET,POST,PUT,DELETE,OPTIONS')
            ->header('Access-Control-Allow-Headers','x-id');
    }
}

Im new to angular2和CORS请求,不知道该怎么办.

>角度：2.0.0-beta.0
> Laravel：5.0
>浏览器：Google Chrome