CURLOPT_MAXLIFETIME_CONN(3) Library Functions Manual NAME CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection SYNOPSIS #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN, long maxlifetime); DESCRIPTION Pass a long as parameter containing maxlifetime - the maximum time in seconds, since the creation of the connection, that you allow an existing connection to have to be considered for reuse for this request. libcurl features a connection cache that holds previously used connections. When a new request is to be done, libcurl considers any connection that matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) limit prevents libcurl from trying too old connections for reuse. This can be used for client-side load balancing. If a connection is found in the cache that is older than this set maxlifetime, it is instead marked for closure. If set to 0, this behavior is disabled: all connections are eligible for reuse. DEFAULT 0 seconds (i.e., disabled) PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* only allow each connection to be reused for 30 seconds */ curl_easy_setopt(curl, CURLOPT_MAXLIFETIME_CONN, 30L); curl_easy_perform(curl); } } AVAILABILITY Added in curl 7.80.0 RETURN VALUE Returns CURLE_OK. SEE ALSO CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3), CURLOPT_MAXAGE_CONN(3), CURLOPT_TIMEOUT(3) libcurl 2024-11-07 CURLOPT_MAXLIFETIME_CONN(3)