size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
{
    std::string data((const char*) ptr, (size_t) size * nmemb);
    *((std::stringstream*) stream) << data << std::endl;
    return size * nmemb;
}


std::string UpdateManager::download(std::string url)
{
    CURL *curl = curl_easy_init();

    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
    //curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
    //curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
    curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
    std::stringstream out;
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &out);
    CURLcode res = curl_easy_perform(curl);
    if (res != CURLE_OK)
        return "ERROR";

    curl_easy_cleanup(curl);
    return out.str();
}