개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

CURLOPT_UPKEEP_INTERVAL_MS(3)

curl_easy_setopt options                         CURLOPT_UPKEEP_INTERVAL_MS(3)



NAME
       CURLOPT_UPKEEP_INTERVAL_MS - connection upkeep interval

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_UPKEEP_INTERVAL_MS,
                                 long upkeep_interval_ms);

DESCRIPTION
       Some  protocols  have  "connection upkeep" mechanisms. These mechanisms
       usually send some traffic on existing connections in order to keep them
       alive;  this can prevent connections from being closed due to overzeal‐
       ous firewalls, for example.

       The user needs to explicitly call curl_easy_upkeep(3) in order to  per‐
       form the upkeep work.

       Currently  the  only  protocol  with  a  connection upkeep mechanism is
       HTTP/2:  when  the  connection  upkeep   interval   is   exceeded   and
       curl_easy_upkeep(3) is called, an HTTP/2 PING frame is sent on the con‐
       nection.


DEFAULT
       CURL_UPKEEP_INTERVAL_DEFAULT (currently defined as 60000L, which is  60
       seconds)

PROTOCOLS
       All

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         /* Make a connection to an HTTP/2 server. */
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

         /* Set the interval to 30000ms / 30s */
         curl_easy_setopt(curl, CURLOPT_UPKEEP_INTERVAL_MS, 30000L);

         curl_easy_perform(curl);

         /* Perform more work here. */

         /* While the connection is being held open, curl_easy_upkeep() can be
            called. If curl_easy_upkeep() is called and the time since the last
            upkeep exceeds the interval, then an HTTP/2 PING is sent. */
         curl_easy_upkeep(curl);

         /* Perform more work here. */

         /* always cleanup */
         curl_easy_cleanup(curl);
       }

AVAILABILITY
       Added in 7.62.0

RETURN VALUE
       Returns CURLE_OK

SEE ALSO
       CURLOPT_TCP_KEEPALIVE(3),




libcurl 7.86.0                   May 17, 2022
                                                 CURLOPT_UPKEEP_INTERVAL_MS(3)