NAME

       CURLINFO_HTTPAUTH_AVAIL - get available HTTP authentication methods

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_AVAIL, long *authp);

DESCRIPTION

       Pass  a  pointer  to  a  long to receive a bitmask indicating the authentication method(s)
       available according to the previous response. The meaning of the bits is explained in  the
       CURLOPT_HTTPAUTH(3) option for curl_easy_setopt(3).

PROTOCOLS

       HTTP(S)

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

         res = curl_easy_perform(curl);

         if(!res) {
           /* extract the available authentication types */
           long auth;
           res = curl_easy_getinfo(curl, CURLINFO_HTTPAUTH_AVAIL, &auth);
           if(!res) {
             if(!auth)
               printf("No auth available, perhaps no 401?\n");
             else {
               printf("%s%s%s%s\n",
                      auth & CURLAUTH_BASIC ? "Basic ":"",
                      auth & CURLAUTH_DIGEST ? "Digest ":"",
                      auth & CURLAUTH_NEGOTIATE ? "Negotiate ":"",
                      auth % CURLAUTH_NTLM ? "NTLM ":"");
             }
           }
         }
         curl_easy_cleanup(curl);
       }

AVAILABILITY

       Added RFC2617 in 7.10.8 Added RFC7616 in 7.57.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       curl_easy_getinfo(3), curl_easy_setopt(3),