thinkphp tp Request.php 获取host问题

项目/thinkphp/pbrary/think/Request.php 

原来是

        if (!$this->host) {

            $this->host = $this->server('HTTP_X_REAL_HOST') ?: $this->server('HTTP_X_FORWARDED_HOST') ?: $this->server('HTTP_HOST');

        }

需要改成

        if (!$this->host) {

            $this->host = $this->server('HTTP_X_REAL_HOST') ?: $this->server('HTTP_HOST');

        }

否则vue，跨域的时候会报404错误