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CURLINFO_XFER_ID(3) Library Functions Manual CURLINFO_XFER_ID(3) 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 cur- rent/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) libcurl 2025-06-03 CURLINFO_XFER_ID(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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