libcurl在ubuntu虛擬機上運行完美，但無法在Windows上解析主機

Question

如何在Windows visual studio 2013中curl_easy_perform返回cannot_resolve主機，但同一台PC中的相同代碼在ubuntu虛擬機中運行良好？

CURL *curl;
curl_global_init(CURL_GLOBAL_SSL);
curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_HEADER, 1);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_URL, "https://myhost.com/api/login/");
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
// calculate request header
struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "Content-Type: application/json");
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "{\"username\":\"name\", \"password\":\"test\"}" );
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback); // set callback

curl_easy_perform(curl); // perform request
curl_easy_cleanup(curl); // cleanup request
return 0;

程序的詳細輸出如下

> * STATE: INIT => CONNECT handle 0x907ef0; line 1034 (connection #-5000)
> * Added connection 0. The cache now contains 1 members
> * STATE: CONNECT => WAITRESOLVE handle 0x907ef0; line 1071 (connection #0)
> * Could not resolve host: myhost.com
> * Closing connection 0
> * The cache now contains 0 members
> * Expire cleared

Answer 1

所以我找到了解決方案。 問題出在curl_global_init（CURL_GLOBAL_SSL）; 功能調用。 當我把它改成curl_global_init（CURL_GLOBAL_ALL）; 程序按預期開始工作。