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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