84 lines
1.9 KiB
Markdown
84 lines
1.9 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_HSTS
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_ALTSVC (3)
|
||
|
|
- CURLOPT_HSTS_CTRL (3)
|
||
|
|
- CURLOPT_RESOLVE (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_HSTS - HSTS cache filename
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#include <curl/curl.h>
|
||
|
|
|
||
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS, char *filename);
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# DESCRIPTION
|
||
|
|
|
||
|
|
Make the *filename* point to a filename 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 also enables HSTS for this handle (the equivalent of
|
||
|
|
setting *CURLHSTS_ENABLE* with CURLOPT_HSTS_CTRL(3)).
|
||
|
|
|
||
|
|
If the given file does not exist or contains no HSTS entries at startup, the
|
||
|
|
HSTS cache simply starts empty. Setting the filename to NULL or "" only
|
||
|
|
enables HSTS without reading from or writing to any file.
|
||
|
|
|
||
|
|
If this option is set multiple times, libcurl loads cache entries from each
|
||
|
|
given file but only stores the last used name for later writing.
|
||
|
|
|
||
|
|
# FILE FORMAT
|
||
|
|
|
||
|
|
The HSTS cache is saved to and loaded from a text file with one entry per
|
||
|
|
physical line. Each line in the file has the following format:
|
||
|
|
|
||
|
|
[host] [stamp]
|
||
|
|
|
||
|
|
[host] is the domain name for the entry and the name is dot-prefixed if it is
|
||
|
|
an entry valid for all subdomains to the name as well or only for the exact
|
||
|
|
name.
|
||
|
|
|
||
|
|
[stamp] is the time (in UTC) when the entry expires and it uses the format
|
||
|
|
"YYYYMMDD HH:MM:SS".
|
||
|
|
|
||
|
|
Lines starting with "#" are treated as comments and are ignored. There is
|
||
|
|
currently no length or size limit.
|
||
|
|
|
||
|
|
# DEFAULT
|
||
|
|
|
||
|
|
NULL, no filename
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
HTTPS and HTTP
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
CURL *curl = curl_easy_init();
|
||
|
|
if(curl) {
|
||
|
|
curl_easy_setopt(curl, CURLOPT_HSTS, "/home/user/.hsts-cache");
|
||
|
|
curl_easy_perform(curl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# AVAILABILITY
|
||
|
|
|
||
|
|
Added in 7.74.0
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|