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.TH CURLINFO_HTTPAUTH_AVAIL 3 "November 04, 2020" "libcurl 7.77.0" "curl_easy_getinfo options"

.SH NAME
CURLINFO_HTTPAUTH_AVAIL \- get available HTTP authentication methods
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_AVAIL, long *authp);
.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(S)
.SH EXAMPLE
.nf
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);
}
.fi
.SH AVAILABILITY
Added RFC2617 in 7.10.8
Added RFC7616 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 curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
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