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CURLOPT_DNS_USE_GLOBAL_CACHE

Section: curl_easy_setopt options (3)
Updated: May 31, 2017
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NAME

CURLOPT_DNS_USE_GLOBAL_CACHE - enable/disable global DNS cache

SYNOPSIS

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE,
long enable);

DESCRIPTION

Pass a long. If the enable value is 1, it tells curl to use a global DNS cache that will survive between easy handle creations and deletions. This is not thread-safe and this will use a global variable.

WARNING: this option is considered obsolete. Stop using it. Switch over to using the share interface instead! See CURLOPT_SHARE(3) and curl_share_init(3).

DEFAULT

PROTOCOLS

All

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  CURLcode ret;
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  /* switch off the use of a global, thread unsafe, cache */
  curl_easy_setopt(curl, CURLOPT_DNS_USE_GLOBAL_CACHE, 0L);
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

AVAILABILITY

Subject for removal in the future. Do not use!

RETURN VALUE

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