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CURLOPT_MAXLIFETIME_CONN(3) Library Functions Manual CURLOPT_MAXLIFETIME_CONN(3) NAME CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN, long maxlifetime); DESCRIPTION Pass a long as parameter containing maxlifetime - the maximum time in sec- onds, since the creation of the connection, that you allow an existing con- nection 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 24 hours (since 8.17.0). Before that, the default was 0 seconds (i.e., dis- abled) PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; 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); result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.80.0 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3), CURLOPT_MAXAGE_CONN(3), CURLOPT_TIMEOUT(3) libcurl 2026-06-11 CURLOPT_MAXLIFETIME_CONN(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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