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_HTTP_VERSION(3)

CURLOPT_HTTP_VERSION(3)    curl_easy_setopt options    CURLOPT_HTTP_VERSION(3)



NAME
       CURLOPT_HTTP_VERSION - HTTP protocol version to use

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTP_VERSION, long version);

DESCRIPTION
       Pass version a long, set to one of the values described below. They ask
       libcurl to use the specific HTTP versions.

       Note that the HTTP version is just a request. libcurl will still prior‐
       itize  to  re-use an existing connection so it might then re-use a con‐
       nection using a HTTP version you have not asked for.


       CURL_HTTP_VERSION_NONE
              We do not care about what version the library uses. libcurl will
              use whatever it thinks fit.

       CURL_HTTP_VERSION_1_0
              Enforce HTTP 1.0 requests.

       CURL_HTTP_VERSION_1_1
              Enforce HTTP 1.1 requests.

       CURL_HTTP_VERSION_2_0
              Attempt  HTTP  2 requests. libcurl will fall back to HTTP 1.1 if
              HTTP 2 cannot be negotiated with the server. (Added in 7.33.0)

              When libcurl uses HTTP/2 over HTTPS, it does not  itself  insist
              on  TLS 1.2 or higher even though that is required by the speci‐
              fication. A user can add  this  version  requirement  with  CUR‐
              LOPT_SSLVERSION(3).

              The  alias  CURL_HTTP_VERSION_2  was  added  in 7.43.0 to better
              reflect the actual protocol name.

       CURL_HTTP_VERSION_2TLS
              Attempt HTTP 2 over TLS (HTTPS) only. libcurl will fall back  to
              HTTP  1.1  if HTTP 2 cannot be negotiated with the HTTPS server.
              For clear text HTTP servers, libcurl will  use  1.1.  (Added  in
              7.47.0)

       CURL_HTTP_VERSION_2_PRIOR_KNOWLEDGE
              Issue  non-TLS  HTTP  requests  using  HTTP/2  without  HTTP/1.1
              Upgrade. It requires prior knowledge that  the  server  supports
              HTTP/2  straight  away.  HTTPS requests will still do HTTP/2 the
              standard way with negotiated protocol version in the  TLS  hand‐
              shake. (Added in 7.49.0)

       CURL_HTTP_VERSION_3
              (Added  in  7.66.0) Setting this value will make libcurl attempt
              to use HTTP/3 directly to server given in  the  URL.  Note  that
              this  cannot gracefully downgrade to earlier HTTP version if the
              server does not support HTTP/3.

              For more reliably upgrading to HTTP/3, set the preferred version
              to  something  lower and let the server announce its HTTP/3 sup‐
              port via Alt-Svc:. See CURLOPT_ALTSVC(3).

DEFAULT
       Since curl 7.62.0: CURL_HTTP_VERSION_2TLS

       Before that: CURL_HTTP_VERSION_1_1

PROTOCOLS
       HTTP

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         CURLcode ret;
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_HTTP_VERSION,
                          (long)CURL_HTTP_VERSION_2TLS);
         ret = curl_easy_perform(curl);
         if(ret == CURLE_HTTP_RETURNED_ERROR) {
           /* an HTTP response error problem */
         }
       }

AVAILABILITY
       Along with HTTP

RETURN VALUE
       Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO
       CURLOPT_SSLVERSION(3),         CURLOPT_HTTP200ALIASES(3),          CUR‐
       LOPT_HTTP09_ALLOWED(3), CURLOPT_ALTSVC(3)



libcurl 7.86.0                 October 22, 2022        CURLOPT_HTTP_VERSION(3)