curl/docs/libcurl/opts/CURLINFO_HTTPAUTH_AVAIL.md

c	SPDX-License-Identifier	Title	Section	Source	See-also	Protocol	Added-in
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	CURLINFO_HTTPAUTH_AVAIL	3	libcurl	CURLINFO_PROXYAUTH_AVAIL (3) CURLOPT_HTTPAUTH (3) curl_easy_getinfo (3) curl_easy_setopt (3)	HTTP	7.10.8

NAME

CURLINFO_HTTPAUTH_AVAIL - 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%

EXAMPLE

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);
  }
}

%AVAILABILITY%

RETURN VALUE

curl_easy_getinfo(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).