NAME

       CURLINFO_PROXYAUTH_USED - get used HTTP proxy authentication method

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXYAUTH_USED, long *authp);

DESCRIPTION

       Pass  a  pointer to a long to receive a bitmask indicating the authentication method that was used in the
       previous request done over an HTTP  proxy.  The  meaning  of  the  possible  bits  is  explained  in  the
       CURLOPT_HTTPAUTH(3) option for curl_easy_setopt(3).

       The returned value has zero or one bit set.

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");
           curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example.com");
           curl_easy_setopt(curl, CURLOPT_PROXYAUTH,
                            CURLAUTH_BASIC | CURLAUTH_DIGEST);
           curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, "shrek");
           curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, "swamp");

           res = curl_easy_perform(curl);

           if(!res) {
             long auth;
             res = curl_easy_getinfo(curl, CURLINFO_PROXYAUTH_USED, &auth);
             if(!res) {
               if(!auth)
                 printf("No auth used\n");
               else {
                 if(auth == CURLAUTH_DIGEST)
                   printf("Used Digest proxy authentication\n");
                 else
                   printf("Used Basic proxy authentication\n");
               }
             }
           }
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 8.12.0

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).

SEE ALSO

       CURLINFO_HTTPAUTH_USED(3), CURLINFO_PROXYAUTH_AVAIL(3), CURLOPT_HTTPAUTH(3)

libcurl                                            2025-06-16                         CURLINFO_PROXYAUTH_USED(3)