Braintree\Http::_doUrlRequest PHP Метод

    public function _doUrlRequest($httpVerb, $url, $requestBody = null)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_TIMEOUT, $this->_config->timeout());
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $httpVerb);
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
        $headers = $this->_getHeaders($curl);
        $headers[] = 'User-Agent: Braintree PHP Library ' . Version::get();
        $headers[] = 'X-ApiVersion: ' . Configuration::API_VERSION;
        $authorization = $this->_getAuthorization();
        if (isset($authorization['user'])) {
            curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
            curl_setopt($curl, CURLOPT_USERPWD, $authorization['user'] . ':' . $authorization['password']);
        } else {
            if (isset($authorization['token'])) {
                $headers[] = 'Authorization: Bearer ' . $authorization['token'];
            }
        }
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        // curl_setopt($curl, CURLOPT_VERBOSE, true);
        if ($this->_config->sslOn()) {
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
            curl_setopt($curl, CURLOPT_CAINFO, $this->getCaFile());
        }
        if (!empty($requestBody)) {
            curl_setopt($curl, CURLOPT_POSTFIELDS, $requestBody);
        }
        if ($this->_config->isUsingProxy()) {
            $proxyHost = $this->_config->getProxyHost();
            $proxyPort = $this->_config->getProxyPort();
            $proxyType = $this->_config->getProxyType();
            $proxyUser = $this->_config->getProxyUser();
            $proxyPwd = $this->_config->getProxyPassword();
            curl_setopt($curl, CURLOPT_PROXY, $proxyHost . ':' . $proxyPort);
            if (!empty($proxyType)) {
                curl_setopt($curl, CURLOPT_PROXYTYPE, $proxyType);
            }
            if ($this->_config->isAuthenticatedProxy()) {
                curl_setopt($curl, CURLOPT_PROXYUSERPWD, $proxyUser . ':' . $proxyPwd);
            }
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($curl);
        $httpStatus = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        $error_code = curl_errno($curl);
        if ($error_code == 28 && $httpStatus == 0) {
            throw new Exception\Timeout();
        }
        curl_close($curl);
        if ($this->_config->sslOn()) {
            if ($httpStatus == 0) {
                throw new Exception\SSLCertificate();
            }
        }
        return ['status' => $httpStatus, 'body' => $response];
    }

 public function testAuthorizationWithConfig()
 {
     $config = new Braintree\Configuration(['environment' => 'development', 'merchant_id' => 'integration_merchant_id', 'publicKey' => 'badPublicKey', 'privateKey' => 'badPrivateKey']);
     $http = new Braintree\Http($config);
     $result = $http->_doUrlRequest('GET', $config->baseUrl() . '/merchants/integration_merchant_id/customers');
     $this->assertEquals(401, $result['status']);
 }