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curl/docs/libcurl/opts/CURLOPT_HSTS.3
Daniel Stenberg 7385610d0c
hsts: add support for Strict-Transport-Security
- enable in the build (configure)
- header parsing
- host name lookup
- unit tests for the above
- CI build
- CURL_VERSION_HSTS bit
- curl_version_info support
- curl -V output
- curl-config --features
- CURLOPT_HSTS_CTRL
- man page for CURLOPT_HSTS_CTRL
- curl --hsts (sets CURLOPT_HSTS_CTRL and works with --libcurl)
- man page for --hsts
- save cache to disk
- load cache from disk
- CURLOPT_HSTS
- man page for CURLOPT_HSTS
- added docs/HSTS.md
- fixed --version docs
- adjusted curl_easy_duphandle

Closes #5896
2020-11-03 16:08:42 +01:00

67 lines
2.6 KiB
Groff

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.TH CURLOPT_HSTS 3 "5 Feb 2019" "libcurl 7.74.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_HSTS \- set HSTS cache file name
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS, char *filename);
.fi
.SH EXPERIMENTAL
Warning: this feature is early code and is marked as experimental. It can only
be enabled by explicitly telling configure with \fB--enable-hsts\fP. You are
advised to not ship this in production before the experimental label is
removed.
.SH DESCRIPTION
Make the \fIfilename\fP point to a file name to load an existing HSTS cache
from, and to store the cache in when the easy handle is closed. Setting a file
name with this option will also enable HSTS for this handle (the equivalent of
setting \fICURLHSTS_ENABLE\fP with \fICURLOPT_HSTS_CTRL(3)\fP).
If the given file does not exist or contains no HSTS entries at startup, the
HSTS cache will simply start empty. Setting the file name to NULL or "" will
only enable HSTS without reading from or writing to any file.
If this option is set multiple times, libcurl will load cache entries from
each given file but will only store the last used name for later writing.
.SH DEFAULT
NULL, no file name
.SH PROTOCOLS
HTTPS and HTTP
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_HSTS, "/home/user/.hsts-cache");
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.74.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_HSTS_CTRL "(3), " CURLOPT_ALTSVC "(3), " CURLOPT_RESOLVE "(3), "