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 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.

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

int main(void)
{


  CURL *curl = curl_easy_init();


  if(curl) {


    CURLcode res;


    curl_off_t 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_T, &pretransfer);


      if(CURLE_OK == res) {


        printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld\n",


               pretransfer / 1000000,


               (long)(pretransfer % 1000000));


      }


    }


    /* always cleanup */


    curl_easy_cleanup(curl);


  }
}

AVAILABILITY

Added in curl 7.61.0

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).