CURLOPT_MAXLIFETIME_CONN - Online Linux Manual PageSection : 3
Updated : November 26, 2021
Source : libcurl 7.82.0
Note : curl_easy_setopt options
NAMECURLOPT_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);
DESCRIPTIONPass 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, it will consider 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 will instead be closed once any in-progress transfers complete. If set to 0, this behavior is disabled: all connections are eligible for reuse.
DEFAULTDefault maxlifetime is 0 seconds (i.e., disabled).
PROTOCOLSAll
EXAMPLECURL *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);
}
AVAILABILITYAdded in 7.80.0
RETURN VALUEReturns CURLE_OK.
SEE ALSOCURLOPT_TIMEOUT(3), CURLOPT_FORBID_REUSE (3)," CURLOPT_FRESH_CONNECT(3), CURLOPT_MAXAGE_CONN (3)," 0
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