使用异步请求请求自己项目的地址时报错

            $Http = new Client();
            $Http->get('http://localhost:8787/merchant/recharge_notice', function ($response) {
                var_dump($response->getStatusCode());
                echo $response->getBody();
            }, function ($exception) {
                echo "失败\n";
                echo $exception;
            });

失败
Exception: connect localhost:8787 fail after 0.0064 seconds in /Users/code/vendor/workerman/http-client/src/Request.php:462