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=1;              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();

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