CURLOPT_MAXLIFETIME_CONN(3)curl_easy_setopt optionsCURLOPT_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
seconds, since the creation of the connection, that you allow an exist-
ing connection to have to be considered for reuse for this request.
libcurl features a connection cache that holds previously used connec-
tions. When a new request is to be done, it will consider any connec-
tion that matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) limit pre-
vents 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 will instead be
closed once any in-progress transfers complete.
If set to 0, this behavior is disabled: all connections are eligible
for reuse.
DEFAULT
Default maxlifetime is 0 seconds (i.e., disabled).
PROTOCOLS
All
EXAMPLE
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 7.80.0
RETURN VALUE
Returns CURLE_OK.
SEE ALSO
CURLOPT_TIMEOUT(3), CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3),
CURLOPT_MAXAGE_CONN(3),
libcurl 7.81.0 November 26, 2021 CURLOPT_MAXLIFETIME_CONN(3)
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