CURLINFO_HTTPAUTH_AVAIL(3) Library Functions Manual NAME CURLINFO_HTTPAUTH_AVAIL - get available HTTP authentication methods SYNOPSIS #include 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 This functionality affects http only 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 in curl 7.10.8 RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. SEE ALSO CURLINFO_PROXYAUTH_AVAIL(3), CURLOPT_HTTPAUTH(3), curl_easy_getinfo(3), curl_easy_setopt(3) libcurl 2024-11-07 CURLINFO_HTTPAUTH_AVAIL(3)