NAME

CURLOPT_DNS_USE_GLOBAL_CACHE - global DNS cache

SYNOPSIS

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE,
long enable);

DESCRIPTION

Has no function since 7.62.0. Do not use! Pass a long. If the enable value is 1, it tells curl to use a global DNS cache that survives between easy handle creations and deletions. This is not thread-safe and this uses a global variable. See CURLOPT_SHARE(3) and curl_share_init(3) for the correct way to share DNS cache between transfers.

DEFAULT

0

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

int main(void)
{
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);
}
}

DEPRECATED

Deprecated since 7.11.1. Functionality removed in 7.62.0.

AVAILABILITY

Added in curl 7.9.3

RETURN VALUE

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

SEE ALSO

CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_SHARE(3)