CURLOPT_SSL_SESSIONID_CACHE(3)                        Library Functions Manual

NAME
       CURLOPT_SSL_SESSIONID_CACHE - use the SSL session-ID cache

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_SESSIONID_CACHE,
                                long enabled);

DESCRIPTION
       Pass a long set to 0 to disable libcurl's use of SSL session-ID
       caching. Set this to 1 to enable it. By default all transfers are done
       using the cache enabled. While nothing ever should get hurt by
       attempting to reuse SSL session-IDs, there seem to be or have been
       broken SSL implementations in the wild that may require you to disable
       this in order for you to succeed.

DEFAULT
       1

PROTOCOLS
       All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

       All TLS backends support this option.

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
           /* switch off session-id use! */
           curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0L);
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY
       Added in 7.16.0

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

SEE ALSO
       CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_MAXAGE_CONN(3),
       CURLOPT_MAXLIFETIME_CONN(3), CURLOPT_SSLVERSION(3)

libcurl                          April 26 2024  CURLOPT_SSL_SESSIONID_CACHE(3)