CURLINFO_PRETRANSFER_TIME_T explained

Name

CURLINFO_PRETRANSFER_TIME_T - get the time until the file transfer start

Synopsis

#include <curl/curl.h>
 
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRETRANSFER_TIME_T,
                           curl_off_t *timep);

Description

Pass a pointer to a curl_off_t to receive the time, in microseconds, it took from the start until the file transfer is just about to begin. This includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. It does not involve the sending of the protocol- specific request 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 man page.

Protocols

All

Example

curl = curl_easy_init();
if(curl) {
  curl_off_t 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_T, &pretransfer);
    if(CURLE_OK == res) {
      printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", pretransfer / 1000000,
             (long)(pretransfer % 1000000));
    }
  }
  /* always cleanup */
  curl_easy_cleanup(curl);
}

Availability

Added in 7.61.0

Return value

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