.\" generated by cd2nroff 0.1 from CURLINFO_HTTPAUTH_AVAIL.md
.TH CURLINFO_HTTPAUTH_AVAIL 3 "2024-04-19" libcurl
.SH NAME
CURLINFO_HTTPAUTH_AVAIL \- get available HTTP authentication methods
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_AVAIL, long *authp);
.fi
.SH 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 \fICURLOPT_HTTPAUTH(3)\fP option for
\fIcurl_easy_setopt(3)\fP.
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    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);
  }
}
.fi
.SH AVAILABILITY
Added RFC 2617 in 7.10.8
Added RFC 7616 in 7.57.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH SEE ALSO
.BR CURLINFO_PROXYAUTH_AVAIL (3),
.BR CURLOPT_HTTPAUTH (3),
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3)