CURL *curl;

    CURLcode res;

    struct curl_slist *headers = NULL;

    curl_global_init(CURL_GLOBAL_ALL);

    curl = curl_easy_init();

    if(curl)

    {

        //初始化cookie引擎

        curl_easy_setopt(curl,CURLOPT_COOKIEFILE,"");    //初始化cookie引擎,才能正确接收到cookie数据.

        curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION, 1L);

        curl_easy_setopt(curl, CURLOPT_URL,"https://passport.csdn.net/account/login");

        curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "cookie_open.txt");        //把服务器发过来的cookie保存到cookie_open.txt

        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);

        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);  

        //FILE *bodyfile;

        //bodyfile = fopen("open.html","w");  

        //curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);  //写数据的回调函数存文件

        //curl_easy_setopt(curl,CURLOPT_WRITEDATA, bodyfile);

        string content;

        //设置回调函数

        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);

        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &content);

        //执行http请求

        res = curl_easy_perform(curl);

        //如果执行成功,

        if(res ==  CURLE_OK)

        {

            struct curl_slist *cookies = NULL;

            curl_easy_getinfo(curl,CURLINFO_COOKIELIST,&cookies);       //获得cookie数据  

            int i=;

            while (cookies)

            {

                TRACE("[%d]: %s\n", i, cookies->data);

                cookies = cookies->next;

                i++;

            }

        }

        //再次请求的地址

        char *token_url="https://passport.csdn.net/account/login";

        //释放资源

        //fclose(bodyfile);

        curl_slist_free_all(headers);

        curl_easy_cleanup(curl);

    }

    curl_global_cleanup();