1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLOPT_MAXLIFETIME_CONN 5Section: 3 6Source: libcurl 7See-also: 8 - CURLOPT_FORBID_REUSE (3) 9 - CURLOPT_FRESH_CONNECT (3) 10 - CURLOPT_MAXAGE_CONN (3) 11 - CURLOPT_TIMEOUT (3) 12Protocol: 13 - All 14--- 15 16# NAME 17 18CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection 19 20# SYNOPSIS 21 22~~~c 23#include <curl/curl.h> 24 25CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN, 26 long maxlifetime); 27~~~ 28 29# DESCRIPTION 30 31Pass a long as parameter containing *maxlifetime* - the maximum time in 32seconds, since the creation of the connection, that you allow an existing 33connection to have to be considered for reuse for this request. 34 35libcurl features a connection cache that holds previously used connections. 36When a new request is to be done, libcurl considers any connection that 37matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) limit prevents 38libcurl from trying too old connections for reuse. This can be used for 39client-side load balancing. If a connection is found in the cache that is 40older than this set *maxlifetime*, it is instead marked for closure. 41 42If set to 0, this behavior is disabled: all connections are eligible for reuse. 43 44# DEFAULT 45 46Default *maxlifetime* is 0 seconds (i.e., disabled). 47 48# EXAMPLE 49 50~~~c 51int main(void) 52{ 53 CURL *curl = curl_easy_init(); 54 if(curl) { 55 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 56 57 /* only allow each connection to be reused for 30 seconds */ 58 curl_easy_setopt(curl, CURLOPT_MAXLIFETIME_CONN, 30L); 59 60 curl_easy_perform(curl); 61 } 62} 63~~~ 64 65# AVAILABILITY 66 67Added in 7.80.0 68 69# RETURN VALUE 70 71Returns CURLE_OK. 72