NAME

       CURLINFO_XFER_ID - get the ID of a transfer

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_XFER_ID,
                                  curl_off_t *xfer_id);

DESCRIPTION

       Pass a pointer to a curl_off_t to receive the identifier of the current/last transfer done
       with the handle. Stores -1 if no transfer has been started yet for the handle.

       The transfer id is unique among all transfers performed using the same  connection  cache.
       This is implicitly the case for all transfers in the same multi handle.

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

           /* Perform the request */
           res = curl_easy_perform(curl);

           if(!res) {
             curl_off_t xfer_id;
             res = curl_easy_getinfo(curl, CURLINFO_XFER_ID, &xfer_id);
             if(!res) {
               printf("Transfer ID: %" CURL_FORMAT_CURL_OFF_T "\n", xfer_id);
             }
           }
         }
       }

AVAILABILITY

       Added in curl 8.2.0

RETURN VALUE

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

SEE ALSO

       CURLINFO_CONN_ID(3), curl_easy_getinfo(3), curl_easy_setopt(3)