Http::query

public function query($command, $params = array(), $waitResponse = false)
{
	if ($command == '' || !is_array($params) || !$this->botId)
	{
		return false;
	}

	foreach ($params as $key => $value)
	{
		$value = $value === '0' ? '#ZERO#' : $value;
		$params[$key] = empty($value) ? '#EMPTY#' : $value;
	}

	$params['BX_COMMAND'] = $command;
	$params['BX_BOT'] = $this->botId;
	$params['BX_LICENCE'] = $this->licenceCode;
	$params['BX_DOMAIN'] = $this->domain;
	$params['BX_TYPE'] = $this->type;
	$params['BX_REGION'] = $this->region;
	$params['BX_VERSION'] = MainModuleManager::getVersion('imbot');
	$params['BX_LANG'] = BitrixMainLocalizationLoc::getCurrentLang();
	$params = BitrixMainTextEncoding::convertEncoding($params, SITE_CHARSET, 'UTF-8');
	$params['BX_HASH'] = self::requestSign($this->type, $params);

	$waitResponse = $waitResponse ? true : (bool)Option::get('imbot', 'wait_response', false);

	Log::write([$this->controllerUrl, $params], 'COMMAND: '.$command);

	$controllerUrl = $this->controllerUrl.'?';
	$controllerUrl .= 'BOT='.$this->botId.'&';
	$controllerUrl .= 'COMMAND='.$command;

	$httpClient = $this->instanceHttpClient($waitResponse);

	$result = $httpClient->post($controllerUrl, $params);
	$errorCode = $httpClient->getHeaders()->get('x-bitrix-error');

	Log::write(['response' => $result, 'error' => $errorCode], 'COMMAND RESULT: '.$command);

	if ($result === false)
	{
		// check for network errors
		$errors = $httpClient->getError();
		if (!empty($errors))
		{
			$result = [
				'error' => [
					'code' => self::ERROR_NETWORK,
					'msg' => 'Network connection error.',
					'errorStack' => $errors,
				]
			];
		}
	}
	elseif ($waitResponse)
	{
		// try to parse result
		if (is_string($result))
		{
			try
			{
				$result = Json::decode($result);
			}
			catch (ArgumentException $exception)
			{
				$result = [
					'error' => [
						'code' => self::ERROR_ANSWER,
						'msg' => 'Server answer is malformed.',
						'errorResult' => $result,
						'errorStack' => [
							$exception->getCode() => $exception->getMessage()
						],
					]
				];
			}
		}
	}
	// don't wait for response body
	else
	{
		$result = ($result !== false);

		if ($errorCode)
		{
			$result = [
				'error' => [
					'code' => $errorCode,
				]
			];
		}
	}

	return $result;
}