CURLOPT_SSL_SESSIONID_CACHE man page

CURLOPT_SSL_SESSIONID_CACHE ā€” enable/disable use of 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

Example

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  /* switch off session-id use! */
  curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0L);
  ret = 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_SSLVERSION(3),

Referenced By

curl_easy_setopt(3).

May 31, 2017 libcurl 7.56.0 curl_easy_setopt options