CURLOPT_ALTSVC - Man Page
set 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_READONLYFILE 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), CURLOPT_COOKIEFILE(3),
Referenced By
curl_easy_setopt(3), CURLOPT_ALTSVC_CTRL(3), CURLOPT_HSTS(3), CURLOPT_HSTS_CTRL(3), CURLOPT_HTTP_VERSION(3).
November 04, 2020 libcurl 7.76.0 curl_easy_setopt options