2019-03-03 05:17:52 -05:00
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.haxx.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_ALTSVC 3 "5 Feb 2019" "libcurl 7.64.1" "curl_easy_setopt options"
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.SH NAME
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CURLOPT_ALTSVC \- set alt-svc cache file name
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ALTSVC, char *filename);
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.fi
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.SH EXPERIMENTAL
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Warning: this feature is early code and is marked as experimental. It can only
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2019-04-03 11:16:18 -04:00
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be enabled by explicitly telling configure with \fB--enable-alt-svc\fP. You are
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2019-03-03 05:17:52 -05:00
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advised to not ship this in production before the experimental label is
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removed.
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.SH DESCRIPTION
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Pass in a pointer to a \fIfilename\fP to instruct libcurl to use that file as
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the Alt-Svc cache to read existing cache contents from and possibly also write
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it back to a after a transfer, unless \fBCURLALTSVC_READONLYFILE\fP is set in
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\fICURLOPT_ALTSVC_CTRL(3)\fP.
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2019-08-14 08:42:11 -04:00
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Specify a blank file name ("") to make libcurl not load from a file at all.
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2019-03-03 05:17:52 -05:00
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.SH DEFAULT
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NULL. The alt-svc cache is not read nor written to file.
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.SH PROTOCOLS
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HTTPS
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.SH EXAMPLE
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.nf
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, CURLALTSVC_H1);
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curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
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curl_easy_perform(curl);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.64.1
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH "SEE ALSO"
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.BR CURLOPT_ALTSVC_CTRL "(3), " CURLOPT_CONNECT_TO "(3), " CURLOPT_RESOLVE "(3), "
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.BR CURLOPT_COOKIEFILE "(3), "
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