NAME

       CURLOPT_AUTOREFERER - automatically update the referer header

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);

DESCRIPTION

       Pass  a  long  parameter set to 1 to enable this. When enabled, libcurl automatically sets
       the Referer: header field in HTTP requests to the full URL when  it  follows  a  Location:
       redirect to a new destination.

       The  automatic  referer  is  set  to  the  full  previous URL even when redirects are done
       cross-origin or following redirects to insecure protocols.  This  is  considered  a  minor
       privacy leak by some.

       With  CURLINFO_REFERER(3), applications can extract the actually used referer header after
       the transfer.

DEFAULT

       0, disabled

PROTOCOLS

       This functionality affects http only

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");

           /* follow redirects */
           curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);

           /* set Referer: automatically when following redirects */
           curl_easy_setopt(curl, CURLOPT_AUTOREFERER, 1L);

           res = curl_easy_perform(curl);

           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.1

RETURN VALUE

       Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLINFO_EFFECTIVE_URL(3),         CURLINFO_REDIRECT_URL(3),          CURLINFO_REFERER(3),
       CURLOPT_FOLLOWLOCATION(3), CURLOPT_REFERER(3)