curl/docs/libcurl/opts/CURLINFO_NAMELOOKUP_TIME.md
Daniel Stenberg e3fe020089
docs/libcurl: generate PROTOCOLS from meta-data
Remove the PROTOCOLS section from the source files completely and
instead generate them based on the header data in the curldown files.

It also generates TLS backend information for options marked for TLS as
protocol.

Closes #13175
2024-03-23 18:13:03 +01:00

1.3 KiB

c SPDX-License-Identifier Title Section Source See-also Protocol
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. curl CURLINFO_NAMELOOKUP_TIME 3 libcurl
CURLINFO_NAMELOOKUP_TIME_T (3)
curl_easy_getinfo (3)
curl_easy_setopt (3)
All

NAME

CURLINFO_NAMELOOKUP_TIME - get the name lookup time

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_NAMELOOKUP_TIME,
                           double *timep);

DESCRIPTION

Pass a pointer to a double to receive the total time in seconds from the start until the name resolving was completed.

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.

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    double namelookup;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    res = curl_easy_perform(curl);
    if(CURLE_OK == res) {
      res = curl_easy_getinfo(curl, CURLINFO_NAMELOOKUP_TIME, &namelookup);
      if(CURLE_OK == res) {
        printf("Time: %.1f", namelookup);
      }
    }
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
}

AVAILABILITY

Added in 7.4.1

RETURN VALUE

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