plucky (3) CURLINFO_XFER_ID.3.gz

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

       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_CONN_ID(3), curl_easy_getinfo(3), curl_easy_setopt(3)