| CURLOPT_MAXAGE_CONN(3) | Introduction to Library Functions | CURLOPT_MAXAGE_CONN(3) |
CURLOPT_MAXAGE_CONN - max idle time allowed for reusing a connection
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXAGE_CONN, long age);
Pass a long as parameter containing age - the maximum time in seconds allowed for an existing connection to have been idle to be considered for reuse for this request.
The "connection cache" holds previously used connections. When a new request is to be done, libcurl considers any connection that matches for reuse. The CURLOPT_MAXAGE_CONN(3) limit prevents libcurl from trying too old connections for reuse, since old connections have a higher risk of not working and thus trying them is a performance loss and sometimes service loss due to the difficulties to figure out the situation. If a connection is found in the cache that is older than this set age, it is closed instead.
118 seconds
This functionality affects all supported protocols
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* only allow 30 seconds idle time */
curl_easy_setopt(curl, CURLOPT_MAXAGE_CONN, 30L);
curl_easy_perform(curl);
}
}
Added in curl 7.65.0
Returns CURLE_OK.
CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3), CURLOPT_MAXLIFETIME_CONN(3), CURLOPT_TIMEOUT(3)
| 2024-10-05 | libcurl |