php - Laravel guzzlehttp - 如何检查主机是否在线？

Question

当我尝试连接到离线或不存在的主机时，出现异常:

cURL error 6: Could not resolve host: somedomain.com

那你怎么用这些东西呢？ ( https://laravel.com/docs/8.x/http-client )

$response->body() : string;
$response->json() : array|mixed;
$response->status() : int;
$response->ok() : bool;
$response->successful() : bool;
$response->failed() : bool;
$response->serverError() : bool;
$response->clientError() : bool;
$response->header($header) : string;
$response->headers() : array;

我需要知道主机是否在线/离线。

编辑:

use Illuminate\Support\Facades\Http;
use GuzzleHttp\Exception\RequestException;


public function checkSiteStatus($host)
{
    try {
        return Http::timeout(2)->get($host);
    } catch (RequestException $e) {
        //Access the message or other type of errors and react to them

        if (!$e->hasResponse()) {
            //No response from server. Assume the host is offline or server is overloaded.
            return 'offline';
        }
        
        return 'offline';
    }
}

它对我不起作用，我总是得到:cURL 错误 6:无法解析主机:somedomain.com

Answer 1

Guzzle HTTP 客户端抛出一组异常。 有可能从异常中得到响应。

http://docs.guzzlephp.org/en/stable/quickstart.html#exceptions

use GuzzleHttp\Exception\RequestException;

try {
    $client->request('GET', 'https://github.com/_abc_123_404');
} catch (RequestException $e) {
    //Access the message or other type of errors and react to them
    $e->getMessage();
    if (! $e->hasResponse()) {
        //No response from server. Assume the host is offline or server is overloaded.
    }
}