c++使用curl库访问服务器并获取应答结果

size_t http_data_writer(void* data, size_t size, size_t nmemb, void* content)
{
    long totalSize = size*nmemb;
    std::string* symbolBuffer = (std::string*)content;
    if(symbolBuffer)
    {
        symbolBuffer->append((char *)data, ((char*)data)+totalSize);
    }
    return totalSize;
}
bool AccessWeb(char* szUrl)
{    
    CURL* curl = NULL;
    curl=curl_easy_init();
    CURLcode code;
    // 设置Url
    code = curl_easy_setopt(curl, CURLOPT_URL, szUrl);
    // 设置post的json数据
    char szPost[64] = "msg=hello";
    code = curl_easy_setopt(curl, CURLOPT_POSTFIELDS, szPost);
    // 设置回调函数
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_func);
    //设置写数据
    std::string strData;
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)&strData);
    // 执行请求
    code = curl_easy_perform(curl);
 
    if(code == CURLcode::CURLE_OK)
    {
    long responseCode = 0;
    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode);
    if (responseCode < 200 || responseCode >= 300 || strData.empty())
    {
        return false;
    }
        //下面可以对应答的数据进行处理了
        // strData
    }
 
    // 清除curl对象
    curl_easy_cleanup(curl);
 
    return true;
}