Accessing server with authentication using libcurl - c

Question

I am trying to access a company internal webpage that requires authentication using libcurl. When the code is run, it says "401 UNAUTHORIZED". I am providing the login credentials via curl_easy_setopt(curl, CURLOPT_USERPWD, "usr:pwd"), but still get the above message.
I read on this and found that 401 means it requires a SERVER authentication. However, I do not receive any available authentication schemes. My winhttp config settings are on 'Auto-detect'.
int wmain()
{
std::string content;
curl_global_init(CURL_GLOBAL_ALL);
CURL *curl = curl_easy_init();
if (curl)
{
curl_easy_setopt(curl, CURLOPT_URL, "company internal URL");
curl_easy_setopt(curl, CURLOPT_USERPWD, "usr:pwd");
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &content);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);
CURLcode code = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
curl_global_cleanup();
std::cout << content;
std::cin.get();
return 0;
}
I am very new to using libcurl and have limited working experience with C/C++. Your help is appreciated to identify the problem. Thanks!

Answer 1

Try to add curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
Also of course "usr:pwd"should be replaced, but I assume you did that.
Example below
https://curl.haxx.se/libcurl/c/CURLOPT_HTTPAUTH.html
CURL *curl = curl_easy_init();
if(curl) {
CURLcode ret;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
/* allow whatever auth the server speaks */
curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_easy_setopt(curl, CURLOPT_USERPWD, "james:bond");
ret = curl_easy_perform(curl);
}