54ded66618
- always assign the curl_easy_perform() return code (and declare the necessary 'result' variable for it) - always call curl_easy_cleanup() on the created easy handles Closes #21364
1.8 KiB
| c | SPDX-License-Identifier | Title | Section | Source | Protocol | See-also | Added-in | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. | curl | CURLOPT_HSTS_CTRL | 3 | libcurl |
|
|
7.74.0 |
NAME
CURLOPT_HSTS_CTRL - control HSTS behavior
SYNOPSIS
#include <curl/curl.h>
#define CURLHSTS_ENABLE (1L << 0)
#define CURLHSTS_READONLYFILE (1L << 1)
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS_CTRL, long bitmask);
DESCRIPTION
HSTS (HTTP Strict Transport Security) means that an HTTPS server can instruct the client to not contact it again over clear-text HTTP for a certain period into the future. libcurl then automatically redirects HTTP attempts to such hosts to instead use HTTPS. This is done by libcurl retaining this knowledge in an in-memory cache.
Populate the long bitmask with the correct set of features to instruct libcurl how to handle HSTS for the transfers using this handle.
BITS
CURLHSTS_ENABLE
Enable the in-memory HSTS cache for this handle.
CURLHSTS_READONLYFILE
Make the HSTS file (if specified) read-only - makes libcurl not save the cache to the file when closing the handle.
DEFAULT
0
%PROTOCOLS%
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
/* enable HSTS */
curl_easy_setopt(curl, CURLOPT_HSTS_CTRL, CURLHSTS_ENABLE);
/* specify where to store the HSTS cache */
curl_easy_setopt(curl, CURLOPT_HSTS, "/home/user/.hsts-cache");
result = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
%AVAILABILITY%
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).