NAME¶

SYNOPSIS¶

CURLSTScode hstsread(CURL *easy, struct curl_hstsentry *sts, void *userp);

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTSREADFUNCTION, hstsread);

EXPERIMENTAL¶

DESCRIPTION¶

This callback function gets called by libcurl repeatedly when it populates the in-memory HSTS cache.

Set the userp argument with the CURLOPT_HSTSREADDATA(3) option or it will be NULL.

When this callback is invoked, the sts pointer points to a populated struct: Copy the host name to 'name' (no longer than 'namelen' bytes). Make it null-terminated. Set 'includeSubDomains' to TRUE or FALSE. Set 'expire' 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 CURLSTS_OK if it returns a name and is prepared to be called again (for another host) or CURLSTS_DONE if it has no entry to return. It can also return CURLSTS_FAIL to signal error.

This option doesn't enable HSTS, you need to use CURLOPT_HSTS_CTRL(3) to do that.

DEFAULT¶

PROTOCOLS¶

EXAMPLE¶

{
  /* 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);
}

AVAILABILITY¶

RETURN VALUE¶

SEE ALSO¶