curl / libcurl / API / curl_easy_setopt / CURLOPT_HSTSWRITEDATA

CURLOPT_HSTSWRITEDATA explained

Name

CURLOPT_HSTSWRITEDATA - pointer passed to the HSTS write callback

Synopsis

#include <curl/curl.h>
 
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTSWRITEDATA, void *pointer);

Description

Data pointer to pass to the HSTS write function. If you use the CURLOPT_HSTSWRITEFUNCTION option, this is the pointer you get as input in the fourth argument to the callback.

This option does not enable HSTS, you need to use CURLOPT_HSTS_CTRL to do that.

Default

NULL

Protocols

This functionality affects http only

Example

struct MyData {
  void *custom;
};
 
int main(void)
{
  CURL *curl = curl_easy_init();
  struct MyData this;
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
 
    /* pass pointer that gets passed in to the
       CURLOPT_HSTSWRITEFUNCTION callback */
    curl_easy_setopt(curl, CURLOPT_HSTSWRITEDATA, &this);
 
    curl_easy_perform(curl);
  }
}

Availability

Added in curl 7.74.0

Return value

This returns CURLE_OK.