protected function prepareRequest(RequestInterface $request, array $options = array())
    {
        $request->setClient($this)->setEventDispatcher(clone $this->getEventDispatcher());

        if ($curl = $this->config[self::CURL_OPTIONS]) {
            $request->getCurlOptions()->overwriteWith(CurlHandle::parseCurlConfig($curl));
        }

        if ($params = $this->config[self::REQUEST_PARAMS]) {
            Version::warn('request.params is deprecated. Use request.options to add default request options.');
            $request->getParams()->overwriteWith($params);
        }

        if ($this->userAgent && !$request->hasHeader('User-Agent')) {
            $request->setHeader('User-Agent', $this->userAgent);
        }

        if ($defaults = $this->config[self::REQUEST_OPTIONS]) {
            $this->requestFactory->applyOptions($request, $defaults, RequestFactoryInterface::OPTIONS_AS_DEFAULTS);
        }

        if ($options) {
            $this->requestFactory->applyOptions($request, $options);
        }

        $this->dispatch('client.create_request', array('client' => $this, 'request' => $request));

        return $request;
    }