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CURLINFO_STARTTRANSFER_TIME_T

Section: C Library Functions (3)
Updated: 202-0-19
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NAME

CURLINFO_STARTTRANSFER_TIME_T - time to first byte received

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_STARTTRANSFER_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 first byte is received by libcurl. This includes CURLINFO_PRETRANSFER_TIME_T(3) and also the time the server needs to calculate the result.

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 result;
    curl_off_t start;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    result = curl_easy_perform(curl);
    if(result == CURLE_OK) {
      result = curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME_T, &start);
      if(result == CURLE_OK) {
        printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", start / 1000000,
               (long)(start % 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).