CURLINFO_PRETRANSFER_TIME - Man Page

#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 instructions that trigger 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.

This functionality affects all supported protocols

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    double pretransfer;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    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 curl 7.4.1

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

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

curl_easy_getinfo(3), CURLINFO_APPCONNECT_TIME(3), CURLINFO_STARTTRANSFER_TIME(3).