<?php
// +----------------------------------------------------------------------
// | CRMEB [ CRMEB赋能开发者，助力企业发展 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2016~2022 https://www.crmeb.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed CRMEB并不是自由软件，未经许可不能去掉CRMEB相关版权
// +----------------------------------------------------------------------
// | Author: CRMEB Team <admin@crmeb.com>
// +----------------------------------------------------------------------

declare(strict_types=1);


namespace app\common\middleware;


use Closure;
use think\Config;
use think\Request;
use think\Response;

/**
 * 跨域中间件
 * Class AllowOriginMiddleware
 * @package app\http\middleware
 */
class AllowOriginMiddleware
{

    protected $cookieDomain;

    protected $header = [
        'Access-Control-Allow-Credentials' => '*',
        'Access-Control-Max-Age'           => 1800,
        'Access-Control-Allow-Methods'     => 'GET, POST, PATCH, PUT, DELETE, OPTIONS',
        'Access-Control-Allow-Headers' => 'token,X-Token, Content-Type, If-Match, If-Modified-Since, If-None-Match, If-Unmodified-Since, X-Requested-With,Form-type,Referer,Connection,Content-Length,Host,Origin,Authorization,Authori-zation,Accept,Accept-Encoding',
    ];

    public function __construct(\think\Config $config)
    {
        $this->cookieDomain = $config->get('cookie.domain', '');
    }

    /**
     * 允许跨域请求
     * @access public
     * @param \think\Request $request
     * @param Closure $next
     * @param array   $header
     * @return Response
     */
    public function handle($request, Closure $next, ? array $header = [])
    {
        $header = !empty($header) ? array_merge($this->header, $header) : $this->header;

        if (!isset($header['Access-Control-Allow-Origin'])) {
            $origin = $request->header('origin');

            if ($origin && ('' == $this->cookieDomain || strpos($origin, $this->cookieDomain))) {
                $header['Access-Control-Allow-Origin'] = $origin;
            } else {
                $header['Access-Control-Allow-Origin'] = '*';
            }
        }

        return $next($request)->header($header);
    }

}