1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_HSTSREADFUNCTION 3 "14 Sep 2020" libcurl libcurl
.SH NAME
CURLOPT_HSTSREADFUNCTION \- read callback for HSTS hosts
.SH SYNOPSIS
.nf
#include <curl/curl.h>
struct curl_hstsentry {
char *name;
size_t namelen;
unsigned int includeSubDomains:1;
char expire[18]; /* YYYYMMDD HH:MM:SS [null-terminated] */
};
CURLSTScode hstsread(CURL *easy, struct curl_hstsentry *sts, void *clientp);
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTSREADFUNCTION, hstsread);
.fi
.SH DESCRIPTION
Pass a pointer to your callback function, as the prototype shows above.
This callback function gets called by libcurl repeatedly when it populates the
in-memory HSTS cache.
Set the \fIclientp\fP argument with the \fICURLOPT_HSTSREADDATA(3)\fP option
or it is NULL.
When this callback is invoked, the \fIsts\fP pointer points to a populated
struct: Copy the host name to \fIname\fP (no longer than \fInamelen\fP
bytes). Make it null-terminated. Set \fIincludeSubDomains\fP to TRUE or
FALSE. Set \fIexpire\fP to a date stamp or a zero length string for *forever*
(wrong date stamp format might cause the name to not get accepted)
The callback should return \fICURLSTS_OK\fP if it returns a name and is
prepared to be called again (for another host) or \fICURLSTS_DONE\fP if it has
no entry to return. It can also return \fICURLSTS_FAIL\fP to signal
error. Returning \fICURLSTS_FAIL\fP stops the transfer from being performed
and make \fICURLE_ABORTED_BY_CALLBACK\fP get returned.
This option does not enable HSTS, you need to use \fICURLOPT_HSTS_CTRL(3)\fP to
do that.
.SH DEFAULT
NULL - no callback.
.SH PROTOCOLS
This feature is only used for HTTP(S) transfer.
.SH EXAMPLE
.nf
{
/* set HSTS read callback */
curl_easy_setopt(curl, CURLOPT_HSTSREADFUNCTION, hstsread);
/* pass in suitable argument to the callback */
curl_easy_setopt(curl, CURLOPT_HSTSREADDATA, &hstspreload[0]);
result = curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.74.0
.SH RETURN VALUE
This returns CURLE_OK.
.SH "SEE ALSO"
.BR CURLOPT_HSTS (3),
.BR CURLOPT_HSTS_CTRL (3),
.BR CURLOPT_HSTSREADDATA (3),
.BR CURLOPT_HSTSWRITEFUNCTION (3)
|
