[cpp-netlib]如何发送post请求

int CHttpFetch::Post(const CString& strURL, const CString& strContent, CString& strResponse){    int nStatus = 200;    try    {        http::client::request request(StringUtility::CStr2Stl(strURL));        std::string content = StringUtility::CStr2Stl(strContent);        CString strContentLength;        strContentLength.Format(_T("%d"), content.length());        request << header("Content-Length", StringUtility::CStr2Stl(strContentLength));        request << header("Content-Type", "application/x-www-form-urlencoded");        request << body(content);        http::client::response response = m_client.post(request);        strResponse = StringUtility::Stl2CStr(chunked_body(response));        nStatus = status(response);    }    catch (std::exception& e)    {        UNREFERENCED_PARAMETER(e);        nStatus = 500;     }    return nStatus;}