Класс для работы с CURL на PHP

Создадим универсальный класс для HTTP запросов GET/POST/PUT на основе CURL.

(пока еще не по PSR-7)

Сам класс:

/**
 * Class Client
 * @package App\Helpers
 */
class Client1
{
    public function request($method, $url, $body = [])
    {
        $method = strtoupper($method);
        //$headers = request()->headers->all();
        try {
            return $this->curl($method, $url, $body);
        } catch (Throwable $e) {
            return $e->getMessage();
        }
    }

    private $connections = [];

    /**
     * @throws JsonException
     */
    private function curl(
        string $method,
        string $url,
        array $bodyFields = [],
        array $headers = []
    ): Response {
        $connectionKey = $url . $method
            . json_encode($bodyFields, JSON_THROW_ON_ERROR)
            . json_encode($headers, JSON_THROW_ON_ERROR);

        if (empty($this->connections[$connectionKey])) {
            $curl = curl_init();
            curl_setopt_array(
                $curl,
                [
                    CURLOPT_URL => $url,
                    CURLOPT_RETURNTRANSFER => true,
                    CURLOPT_ENCODING => "",
                    CURLOPT_MAXREDIRS => 10,
                    CURLOPT_TIMEOUT => 0,
                    CURLOPT_FOLLOWLOCATION => true,
                    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
                    CURLOPT_CUSTOMREQUEST => $method,
                    CURLOPT_HTTPHEADER => $this->prepareHeaders($headers),
                    CURLOPT_POSTFIELDS => is_array($bodyFields)
                        ? json_encode($bodyFields, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE)
                        : $bodyFields,
                ]
            );
            $this->connections[$connectionKey] = $curl;
        } else {
            $curl = $this->connections[$connectionKey];
        }

        $responseBody = curl_exec($curl);
        $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        //curl_close($curl);
        return new Response('', $responseBody, $statusCode);
    }

    private function prepareHeaders($headers): array
    {
        $flattened = [];
        foreach ($headers as $key => $header) {
            if (is_int($key)) {
                $flattened[] = $header;
            } else {
                $flattened[] = $key . ': ' . $header;
            }
        }
        return $flattened;//implode("\r\n", $flattened);
    }
}

class Response
{
    private $body;
    private $headers;
    private $statusCode;

    public function __construct($headers, $body, $statusCode)
    {
        $this->headers = $headers;
        $this->body = $body;
        $this->statusCode = $statusCode;
    }

    public function getBody()
    {
        return $this->body;
    }

    public function getHeaders()
    {
        return $this->headers;
    }

    public function getStatusCode()
    {
        return $this->statusCode;
    }
}

Пример использования:

$proxy = Settings::get($name, 'service_proxy');

if ($proxy) {
  $url = $proxy;
  $msg = Proxy::request($url, 'POST', json_decode($request->getContent(), 1));
  return response($msg)->header('Content-Type', 'application/json');
}