使用libcurl 发送post请求

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SendHttpPost(string& strUrl, string& strPost, string& strResponse， int nTimeOut) {     CURLcode res;     CURL* curl = curl_easy_init();     if(NULL == curl)     {         return CURLE_FAILED_INIT;     }       if (nTimeOut < 60)     {         nTimeOut = 60;     }       curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());     curl_easy_setopt(curl, CURLOPT_POST, 1);     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, strPost.c_str());     curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);     curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);     curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);     curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, nTimeOut);     curl_easy_setopt(curl, CURLOPT_TIMEOUT, m_nMD5TimeOut);       res = curl_easy_perform(curl);     curl_easy_cleanup(curl);       return res; }