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| .TH CURLOPT_CA_CACHE_TIMEOUT 3 "21 Dec 2022" libcurl libcurl |
| .SH NAME |
| CURLOPT_CA_CACHE_TIMEOUT \- life-time for cached certificate stores |
| .SH SYNOPSIS |
| .nf |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CA_CACHE_TIMEOUT, long age); |
| .fi |
| .SH DESCRIPTION |
| Pass a long, this sets the timeout in seconds. This tells libcurl the maximum |
| time any cached certificate store it has in memory may be kept and reused for |
| new connections. Once the timeout has expired, a subsequent fetch requiring a |
| certificate store will have to build a new one. |
| |
| Building a certificate store from a \fICURLOPT_CAINFO\fP file is a slow |
| operation so curl may cache the generated certificate store internally to speed |
| up future connections. |
| |
| Set to zero to completely disable caching, or set to -1 to retain the cached |
| store remain forever. By default, libcurl caches this info for 24 hours. |
| .SH DEFAULT |
| 86400 (24 hours) |
| .SH PROTOCOLS |
| All |
| .SH EXAMPLE |
| .nf |
| CURL *curl = curl_easy_init(); |
| if(curl) { |
| curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin"); |
| |
| /* only reuse certificate stores for a short time */ |
| curl_easy_setopt(curl, CURLOPT_CA_CACHE_TIMEOUT, 60L); |
| |
| ret = curl_easy_perform(curl); |
| |
| /* in this second request, the cache will not be used if more than |
| sixty seconds have passed since the previous connection */ |
| ret = curl_easy_perform(curl); |
| |
| curl_easy_cleanup(curl); |
| } |
| .fi |
| .SH AVAILABILITY |
| This option was added in curl 7.87.0. |
| |
| Currently the only SSL backend to implement this certificate store caching |
| functionality is the OpenSSL (and forks) backend. |
| .SH RETURN VALUE |
| Returns CURLE_OK |
| .SH "SEE ALSO" |
| .BR CURLOPT_CAINFO "(3), " |
| .BR CURLOPT_CAINFO_BLOB "(3), " CURLOPT_CAPATH "(3), " |
| .BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_SSL_VERIFYHOST "(3), " |
