CURLOPT_SSL_SESSIONID_CACHE(3) | Library Functions Manual | CURLOPT_SSL_SESSIONID_CACHE(3) |
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
This functionality affects 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 curl 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)
2024-09-18 | libcurl |