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CURLOPT_ALTSVC(3)          curl_easy_setopt options          CURLOPT_ALTSVC(3)

NAME
       CURLOPT_ALTSVC - alt-svc cache file name

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ALTSVC, char *filename);

DESCRIPTION
       Pass in a pointer to a filename to instruct libcurl to use that file as
       the Alt-Svc cache to read existing cache  contents  from  and  possibly
       also  write  it back to a after a transfer, unless CURLALTSVC_READONLY-
       FILE is set in CURLOPT_ALTSVC_CTRL(3).

       Specify a blank file name ("") to make libcurl not load from a file  at
       all.

DEFAULT
       NULL. The alt-svc cache is not read nor written to file.

PROTOCOLS
       HTTPS

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, CURLALTSVC_H1);
         curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
         curl_easy_perform(curl);
       }

AVAILABILITY
       Added in 7.64.1

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

SEE ALSO
       CURLOPT_ALTSVC_CTRL(3), CURLOPT_CONNECT_TO(3), CURLOPT_RESOLVE(3), CUR-
       LOPT_COOKIEFILE(3),

libcurl 7.81.0                September 08, 2021             CURLOPT_ALTSVC(3)

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