DOKK / manpages / debian 12 / libcurl4-doc / CURLINFO_PRETRANSFER_TIME.3.en
CURLINFO_PRETRANSFER_TIME(3) curl_easy_getinfo options CURLINFO_PRETRANSFER_TIME(3)

CURLINFO_PRETRANSFER_TIME - get the time until the file transfer start

#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRETRANSFER_TIME,

double *timep);

Pass a pointer to a double to receive the time, in seconds, it took from the start until the file transfer is just about to begin.

This time-stamp includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. It includes the sending of the protocol- specific protocol instructions that triggers a transfer.

When a redirect is followed, the time from each request is added together.

See also the TIMES overview in the curl_easy_getinfo(3) man page.

All

curl = curl_easy_init();
if(curl) {

double pretransfer;
curl_easy_setopt(curl, CURLOPT_URL, url);
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME, &pretransfer);
if(CURLE_OK == res) {
printf("Time: %.1f", pretransfer);
}
}
/* always cleanup */
curl_easy_cleanup(curl); }

Added in 7.4.1

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

curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_PRETRANSFER_TIME_T(3)

January 2, 2023 libcurl 7.88.1