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Diffstat (limited to 'docs/libcurl/opts/CURLOPT_HSTSWRITEFUNCTION.3')
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1 files changed, 79 insertions, 0 deletions
diff --git a/docs/libcurl/opts/CURLOPT_HSTSWRITEFUNCTION.3 b/docs/libcurl/opts/CURLOPT_HSTSWRITEFUNCTION.3 new file mode 100644 index 000000000..ecf1d86f0 --- /dev/null +++ b/docs/libcurl/opts/CURLOPT_HSTSWRITEFUNCTION.3 @@ -0,0 +1,79 @@ +.\" ************************************************************************** +.\" * _ _ ____ _ +.\" * Project ___| | | | _ \| | +.\" * / __| | | | |_) | | +.\" * | (__| |_| | _ <| |___ +.\" * \___|\___/|_| \_\_____| +.\" * +.\" * Copyright (C) 1998 - 2020, 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.haxx.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. +.\" * +.\" ************************************************************************** +.\" +.TH CURLOPT_HSTSWRITEFUNCTION 3 "14 Sep 2020" "libcurl 7.74.0" "curl_easy_setopt options" +.SH NAME +CURLOPT_HSTSWRITEFUNCTION \- write callback for HSTS hosts +.SH SYNOPSIS +#include <curl/curl.h> + +CURLSTScode hstswrite(CURL *easy, struct curl_hstsentry *sts, + struct curl_index *count, void *userp); + +CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTSWRITEFUNCTION, hstswrite); +.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 +Pass a pointer to your callback function, as the prototype shows above. + +This callback function gets called by libcurl repeatedly to allow the +application to store the in-memory HSTS cache when libcurl is about to discard +it. + +Set the \fIuserp\fP argument with the \fICURLOPT_HSTSWRITEDATA(3)\fP option or +it will be NULL. + +When the callback is invoked, the \fIsts\fP pointer points to a populated +struct: Read the host name to 'name' (it is 'namelen' bytes long and null +terminated. The 'includeSubDomains' field is non-zero if the entry matches +subdomains. The 'expire' string is a date stamp null-terminated string using +the syntax YYYYMMDD HH:MM:SS. + +The callback should return \fICURLSTS_OK\fP if it succeeded and is prepared to +be called again (for another host) or \fICURLSTS_DONE\fP if there's nothing +more to do. It can also return \fICURLSTS_FAIL\fP to signal error. +.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_HSTSWRITEFUNCTION, hstswrite); + + /* pass in suitable argument to the callback */ + curl_easy_setopt(curl, CURLOPT_HSTSWRITEDATA, &hstspreload[0]); + + result = curl_easy_perform(curl); +} +.fi +.SH AVAILABILITY +Added in 7.74.0 +.SH RETURN VALUE +This will return CURLE_OK. +.SH "SEE ALSO" +.BR CURLOPT_HSTSWRITEDATA "(3), " CURLOPT_HSTSWRITEFUNCTION "(3), " +.BR CURLOPT_HSTS "(3), " CURLOPT_HSTS_CTRL "(3), " |