CURLOPT_DNS_USE_GLOBAL_CACHE(3)

CURLOPT_DNS_USE_GLOBAL_CACHE(3curl_easy_setopt optionCURLOPT_DNS_USE_GLOBAL_CACHE(3)

NAME

     CURLOPT_DNS_USE_GLOBAL_CACHE  -  enable/disable  global  DNS
     cache

SYNOPSIS

     #include <curl/curl.h>

     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

     0

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.

SEE ALSO

     CURLOPT_SHARE(3), CURLOPT_DNS_CACHE_TIMEOUT(3),

libcurl 7.58.0      Last change: May 31, 2017                   1