mirror of
https://github.com/curl/curl.git
synced 2026-07-14 11:02:12 +03:00
54ded66618
- always assign the curl_easy_perform() return code (and declare the necessary 'result' variable for it) - always call curl_easy_cleanup() on the created easy handles Closes #21364
79 lines
1.9 KiB
Markdown
79 lines
1.9 KiB
Markdown
---
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
SPDX-License-Identifier: curl
|
|
Title: CURLOPT_MAXLIFETIME_CONN
|
|
Section: 3
|
|
Source: libcurl
|
|
See-also:
|
|
- CURLOPT_FORBID_REUSE (3)
|
|
- CURLOPT_FRESH_CONNECT (3)
|
|
- CURLOPT_MAXAGE_CONN (3)
|
|
- CURLOPT_TIMEOUT (3)
|
|
Protocol:
|
|
- All
|
|
Added-in: 7.80.0
|
|
---
|
|
|
|
# NAME
|
|
|
|
CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection
|
|
|
|
# SYNOPSIS
|
|
|
|
~~~c
|
|
#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 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, 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.,
|
|
disabled)
|
|
|
|
# %PROTOCOLS%
|
|
|
|
# EXAMPLE
|
|
|
|
~~~c
|
|
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%
|
|
|
|
# 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).
|