NAME

       CURLINFO_PROXYAUTH_AVAIL - get available HTTP proxy authentication methods

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXYAUTH_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_PROXYAUTH(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");
           curl_easy_setopt(curl, CURLOPT_PROXY, "http://127.0.0.1:80");

           res = curl_easy_perform(curl);

           if(!res) {
             /* extract the available proxy authentication types */
             long auth;
             res = curl_easy_getinfo(curl, CURLINFO_PROXYAUTH_AVAIL, &auth);
             if(!res) {
               if(!auth)
                 printf("No proxy auth available, perhaps no 407?\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.

SEE ALSO

       curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_HTTPAUTH_AVAIL(3)