CURLOPT_AUTOREFERER(3)     Library Functions Manual     CURLOPT_AUTOREFERER(3)

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
       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).

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

libcurl                           2025-02-13            CURLOPT_AUTOREFERER(3)