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

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

Added RFC 2617 in 7.10.8 Added RFC 7616 in 7.57.0

RETURN VALUE

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