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CURLINFO_PROXYAUTH_AVAIL(3)         libcurl        CURLINFO_PROXYAUTH_AVAIL(3)

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
       CURL *curl = curl_easy_init();
       if(curl) {
         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 RFC2617 in 7.10.8 Added RFC7616 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),

ibcurl 8.1.2                    April 26, 2023     CURLINFO_PROXYAUTH_AVAIL(3)